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authorLinus Torvalds <torvalds@linux-foundation.org>2020-06-08 12:05:31 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2020-06-08 12:05:31 -0700
commit23fc02e36e4f657af242e59175c891b27c704935 (patch)
tree43e7d81637b4f3a6ec2d8e5d754f33dc6171f729 /arch/s390
parent4e3a16ee9148e966678bbc713579235422271a63 (diff)
parentbfa50e1427e4608ce6941d3d0855445fcaa7dbb7 (diff)
downloadlinux-23fc02e36e4f657af242e59175c891b27c704935.tar.bz2
Merge tag 's390-5.8-1' of git://git.kernel.org/pub/scm/linux/kernel/git/s390/linux
Pull s390 updates from Vasily Gorbik: - Add support for multi-function devices in pci code. - Enable PF-VF linking for architectures using the pdev->no_vf_scan flag (currently just s390). - Add reipl from NVMe support. - Get rid of critical section cleanup in entry.S. - Refactor PNSO CHSC (perform network subchannel operation) in cio and qeth. - QDIO interrupts and error handling fixes and improvements, more refactoring changes. - Align ioremap() with generic code. - Accept requests without the prefetch bit set in vfio-ccw. - Enable path handling via two new regions in vfio-ccw. - Other small fixes and improvements all over the code. * tag 's390-5.8-1' of git://git.kernel.org/pub/scm/linux/kernel/git/s390/linux: (52 commits) vfio-ccw: make vfio_ccw_regops variables declarations static vfio-ccw: Add trace for CRW event vfio-ccw: Wire up the CRW irq and CRW region vfio-ccw: Introduce a new CRW region vfio-ccw: Refactor IRQ handlers vfio-ccw: Introduce a new schib region vfio-ccw: Refactor the unregister of the async regions vfio-ccw: Register a chp_event callback for vfio-ccw vfio-ccw: Introduce new helper functions to free/destroy regions vfio-ccw: document possible errors vfio-ccw: Enable transparent CCW IPL from DASD s390/pci: Log new handle in clp_disable_fh() s390/cio, s390/qeth: cleanup PNSO CHSC s390/qdio: remove q->first_to_kick s390/qdio: fix up qdio_start_irq() kerneldoc s390: remove critical section cleanup from entry.S s390: add machine check SIGP s390/pci: ioremap() align with generic code s390/ap: introduce new ap function ap_get_qdev() Documentation/s390: Update / remove developerWorks web links ...
Diffstat (limited to 'arch/s390')
-rw-r--r--arch/s390/appldata/appldata_mem.c4
-rw-r--r--arch/s390/appldata/appldata_net_sum.c4
-rw-r--r--arch/s390/appldata/appldata_os.c4
-rw-r--r--arch/s390/include/asm/ccwdev.h5
-rw-r--r--arch/s390/include/asm/chsc.h62
-rw-r--r--arch/s390/include/asm/io.h2
-rw-r--r--arch/s390/include/asm/ipl.h11
-rw-r--r--arch/s390/include/asm/nmi.h2
-rw-r--r--arch/s390/include/asm/pci.h42
-rw-r--r--arch/s390/include/asm/pci_clp.h13
-rw-r--r--arch/s390/include/asm/processor.h20
-rw-r--r--arch/s390/include/asm/qdio.h33
-rw-r--r--arch/s390/include/asm/smp.h1
-rw-r--r--arch/s390/include/uapi/asm/ipl.h25
-rw-r--r--arch/s390/kernel/Makefile5
-rw-r--r--arch/s390/kernel/entry.S464
-rw-r--r--arch/s390/kernel/ftrace.c16
-rw-r--r--arch/s390/kernel/idle.c14
-rw-r--r--arch/s390/kernel/ipl.c209
-rw-r--r--arch/s390/kernel/nmi.c23
-rw-r--r--arch/s390/kernel/ptrace.c2
-rw-r--r--arch/s390/kernel/setup.c16
-rw-r--r--arch/s390/kernel/smp.c8
-rw-r--r--arch/s390/kvm/kvm-s390.c3
-rw-r--r--arch/s390/kvm/vsie.c3
-rw-r--r--arch/s390/lib/delay.c4
-rw-r--r--arch/s390/pci/Makefile3
-rw-r--r--arch/s390/pci/pci.c225
-rw-r--r--arch/s390/pci/pci_bus.c328
-rw-r--r--arch/s390/pci/pci_bus.h31
-rw-r--r--arch/s390/pci/pci_clp.c8
-rw-r--r--arch/s390/pci/pci_event.c39
-rw-r--r--arch/s390/pci/pci_sysfs.c4
33 files changed, 1003 insertions, 630 deletions
diff --git a/arch/s390/appldata/appldata_mem.c b/arch/s390/appldata/appldata_mem.c
index e68136c3c23a..21c3147bd92a 100644
--- a/arch/s390/appldata/appldata_mem.c
+++ b/arch/s390/appldata/appldata_mem.c
@@ -29,10 +29,6 @@
* the structure version (product ID, see appldata_base.c) needs to be changed
* as well and all documentation and z/VM applications using it must be
* updated.
- *
- * The record layout is documented in the Linux for zSeries Device Drivers
- * book:
- * http://oss.software.ibm.com/developerworks/opensource/linux390/index.shtml
*/
struct appldata_mem_data {
u64 timestamp;
diff --git a/arch/s390/appldata/appldata_net_sum.c b/arch/s390/appldata/appldata_net_sum.c
index 8bc14b0d1def..59c282ca002f 100644
--- a/arch/s390/appldata/appldata_net_sum.c
+++ b/arch/s390/appldata/appldata_net_sum.c
@@ -25,10 +25,6 @@
* This is accessed as binary data by z/VM. If changes to it can't be avoided,
* the structure version (product ID, see appldata_base.c) needs to be changed
* as well and all documentation and z/VM applications using it must be updated.
- *
- * The record layout is documented in the Linux for zSeries Device Drivers
- * book:
- * http://oss.software.ibm.com/developerworks/opensource/linux390/index.shtml
*/
struct appldata_net_sum_data {
u64 timestamp;
diff --git a/arch/s390/appldata/appldata_os.c b/arch/s390/appldata/appldata_os.c
index 8bf46d705957..5503217366ec 100644
--- a/arch/s390/appldata/appldata_os.c
+++ b/arch/s390/appldata/appldata_os.c
@@ -32,10 +32,6 @@
* the structure version (product ID, see appldata_base.c) needs to be changed
* as well and all documentation and z/VM applications using it must be
* updated.
- *
- * The record layout is documented in the Linux for zSeries Device Drivers
- * book:
- * http://oss.software.ibm.com/developerworks/opensource/linux390/index.shtml
*/
struct appldata_os_per_cpu {
u32 per_cpu_user; /* timer ticks spent in user mode */
diff --git a/arch/s390/include/asm/ccwdev.h b/arch/s390/include/asm/ccwdev.h
index 865ce1cb86d5..3cfe1eb89838 100644
--- a/arch/s390/include/asm/ccwdev.h
+++ b/arch/s390/include/asm/ccwdev.h
@@ -11,6 +11,7 @@
#include <linux/device.h>
#include <linux/mod_devicetable.h>
+#include <asm/chsc.h>
#include <asm/fcx.h>
#include <asm/irq.h>
#include <asm/schid.h>
@@ -236,4 +237,8 @@ extern void ccw_device_get_schid(struct ccw_device *, struct subchannel_id *);
struct channel_path_desc_fmt0 *ccw_device_get_chp_desc(struct ccw_device *, int);
u8 *ccw_device_get_util_str(struct ccw_device *cdev, int chp_idx);
+int ccw_device_pnso(struct ccw_device *cdev,
+ struct chsc_pnso_area *pnso_area,
+ struct chsc_pnso_resume_token resume_token,
+ int cnc);
#endif /* _S390_CCWDEV_H_ */
diff --git a/arch/s390/include/asm/chsc.h b/arch/s390/include/asm/chsc.h
new file mode 100644
index 000000000000..36ce2d25a5fc
--- /dev/null
+++ b/arch/s390/include/asm/chsc.h
@@ -0,0 +1,62 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+/*
+ * Copyright IBM Corp. 2020
+ *
+ * Author(s): Alexandra Winter <wintera@linux.ibm.com>
+ *
+ * Interface for Channel Subsystem Call
+ */
+#ifndef _ASM_S390_CHSC_H
+#define _ASM_S390_CHSC_H
+
+#include <uapi/asm/chsc.h>
+
+/**
+ * struct chsc_pnso_naid_l2 - network address information descriptor
+ * @nit: Network interface token
+ * @addr_lnid: network address and logical network id (VLAN ID)
+ */
+struct chsc_pnso_naid_l2 {
+ u64 nit;
+ struct { u8 mac[6]; u16 lnid; } addr_lnid;
+} __packed;
+
+struct chsc_pnso_resume_token {
+ u64 t1;
+ u64 t2;
+} __packed;
+
+struct chsc_pnso_naihdr {
+ struct chsc_pnso_resume_token resume_token;
+ u32:32;
+ u32 instance;
+ u32:24;
+ u8 naids;
+ u32 reserved[3];
+} __packed;
+
+struct chsc_pnso_area {
+ struct chsc_header request;
+ u8:2;
+ u8 m:1;
+ u8:5;
+ u8:2;
+ u8 ssid:2;
+ u8 fmt:4;
+ u16 sch;
+ u8:8;
+ u8 cssid;
+ u16:16;
+ u8 oc;
+ u32:24;
+ struct chsc_pnso_resume_token resume_token;
+ u32 n:1;
+ u32:31;
+ u32 reserved[3];
+ struct chsc_header response;
+ u32:32;
+ struct chsc_pnso_naihdr naihdr;
+ struct chsc_pnso_naid_l2 entries[0];
+} __packed __aligned(PAGE_SIZE);
+
+#endif /* _ASM_S390_CHSC_H */
diff --git a/arch/s390/include/asm/io.h b/arch/s390/include/asm/io.h
index 5a16f500515a..da014e4f8113 100644
--- a/arch/s390/include/asm/io.h
+++ b/arch/s390/include/asm/io.h
@@ -26,7 +26,7 @@ void unxlate_dev_mem_ptr(phys_addr_t phys, void *addr);
#define IO_SPACE_LIMIT 0
-void __iomem *ioremap(unsigned long offset, unsigned long size);
+void __iomem *ioremap(phys_addr_t addr, size_t size);
void iounmap(volatile void __iomem *addr);
static inline void __iomem *ioport_map(unsigned long port, unsigned int nr)
diff --git a/arch/s390/include/asm/ipl.h b/arch/s390/include/asm/ipl.h
index b63bd66404b8..7d5cfdda5277 100644
--- a/arch/s390/include/asm/ipl.h
+++ b/arch/s390/include/asm/ipl.h
@@ -21,6 +21,7 @@ struct ipl_parameter_block {
struct ipl_pb0_common common;
struct ipl_pb0_fcp fcp;
struct ipl_pb0_ccw ccw;
+ struct ipl_pb0_nvme nvme;
char raw[PAGE_SIZE - sizeof(struct ipl_pl_hdr)];
};
} __packed __aligned(PAGE_SIZE);
@@ -30,6 +31,11 @@ struct ipl_parameter_block {
#define IPL_BP_FCP_LEN (sizeof(struct ipl_pl_hdr) + \
sizeof(struct ipl_pb0_fcp))
#define IPL_BP0_FCP_LEN (sizeof(struct ipl_pb0_fcp))
+
+#define IPL_BP_NVME_LEN (sizeof(struct ipl_pl_hdr) + \
+ sizeof(struct ipl_pb0_nvme))
+#define IPL_BP0_NVME_LEN (sizeof(struct ipl_pb0_nvme))
+
#define IPL_BP_CCW_LEN (sizeof(struct ipl_pl_hdr) + \
sizeof(struct ipl_pb0_ccw))
#define IPL_BP0_CCW_LEN (sizeof(struct ipl_pb0_ccw))
@@ -59,6 +65,7 @@ enum ipl_type {
IPL_TYPE_FCP = 4,
IPL_TYPE_FCP_DUMP = 8,
IPL_TYPE_NSS = 16,
+ IPL_TYPE_NVME = 32,
};
struct ipl_info
@@ -74,6 +81,10 @@ struct ipl_info
u64 lun;
} fcp;
struct {
+ u32 fid;
+ u32 nsid;
+ } nvme;
+ struct {
char name[NSS_NAME_SIZE + 1];
} nss;
} data;
diff --git a/arch/s390/include/asm/nmi.h b/arch/s390/include/asm/nmi.h
index b160da8fa14b..5afee80cff58 100644
--- a/arch/s390/include/asm/nmi.h
+++ b/arch/s390/include/asm/nmi.h
@@ -99,7 +99,7 @@ int nmi_alloc_per_cpu(struct lowcore *lc);
void nmi_free_per_cpu(struct lowcore *lc);
void s390_handle_mcck(void);
-void s390_do_machine_check(struct pt_regs *regs);
+int s390_do_machine_check(struct pt_regs *regs);
#endif /* __ASSEMBLY__ */
#endif /* _ASM_S390_NMI_H */
diff --git a/arch/s390/include/asm/pci.h b/arch/s390/include/asm/pci.h
index 7485ee561fec..99b92c3e46b0 100644
--- a/arch/s390/include/asm/pci.h
+++ b/arch/s390/include/asm/pci.h
@@ -22,12 +22,17 @@ int pci_domain_nr(struct pci_bus *);
int pci_proc_domain(struct pci_bus *);
#define ZPCI_BUS_NR 0 /* default bus number */
-#define ZPCI_DEVFN 0 /* default device number */
#define ZPCI_NR_DMA_SPACES 1
#define ZPCI_NR_DEVICES CONFIG_PCI_NR_FUNCTIONS
#define ZPCI_DOMAIN_BITMAP_SIZE (1 << 16)
+#ifdef PCI
+#if (ZPCI_NR_DEVICES > ZPCI_DOMAIN_BITMAP_SIZE)
+# error ZPCI_NR_DEVICES can not be bigger than ZPCI_DOMAIN_BITMAP_SIZE
+#endif
+#endif /* PCI */
+
/* PCI Function Controls */
#define ZPCI_FC_FN_ENABLED 0x80
#define ZPCI_FC_ERROR 0x40
@@ -94,10 +99,26 @@ struct zpci_bar_struct {
struct s390_domain;
+#define ZPCI_FUNCTIONS_PER_BUS 256
+struct zpci_bus {
+ struct kref kref;
+ struct pci_bus *bus;
+ struct zpci_dev *function[ZPCI_FUNCTIONS_PER_BUS];
+ struct list_head resources;
+ struct list_head bus_next;
+ struct resource bus_resource;
+ int pchid;
+ int domain_nr;
+ bool multifunction;
+ enum pci_bus_speed max_bus_speed;
+};
+
/* Private data per function */
struct zpci_dev {
- struct pci_bus *bus;
+ struct zpci_bus *zbus;
struct list_head entry; /* list of all zpci_devices, needed for hotplug, etc. */
+ struct list_head bus_next;
+ struct kref kref;
struct hotplug_slot hotplug_slot;
enum zpci_state state;
@@ -107,7 +128,12 @@ struct zpci_dev {
u16 pchid; /* physical channel ID */
u8 pfgid; /* function group ID */
u8 pft; /* pci function type */
- u16 domain;
+ u8 port;
+ u8 rid_available : 1;
+ u8 has_hp_slot : 1;
+ u8 is_physfn : 1;
+ u8 reserved : 5;
+ unsigned int devfn; /* DEVFN part of the RID*/
struct mutex lock;
u8 pfip[CLP_PFIP_NR_SEGMENTS]; /* pci function internal path */
@@ -167,6 +193,7 @@ static inline bool zdev_enabled(struct zpci_dev *zdev)
extern const struct attribute_group *zpci_attr_groups[];
extern unsigned int s390_pci_force_floating __initdata;
+extern unsigned int s390_pci_no_rid;
/* -----------------------------------------------------------------------------
Prototypes
@@ -227,7 +254,14 @@ static inline void zpci_exit_slot(struct zpci_dev *zdev) {}
/* Helpers */
static inline struct zpci_dev *to_zpci(struct pci_dev *pdev)
{
- return pdev->sysdata;
+ struct zpci_bus *zbus = pdev->sysdata;
+
+ return zbus->function[pdev->devfn];
+}
+
+static inline struct zpci_dev *to_zpci_dev(struct device *dev)
+{
+ return to_zpci(to_pci_dev(dev));
}
struct zpci_dev *get_zdev_by_fid(u32);
diff --git a/arch/s390/include/asm/pci_clp.h b/arch/s390/include/asm/pci_clp.h
index bd2cb4ea7d93..eb51272dd2cc 100644
--- a/arch/s390/include/asm/pci_clp.h
+++ b/arch/s390/include/asm/pci_clp.h
@@ -93,7 +93,10 @@ struct clp_req_query_pci {
struct clp_rsp_query_pci {
struct clp_rsp_hdr hdr;
u16 vfn; /* virtual fn number */
- u16 : 6;
+ u16 : 3;
+ u16 rid_avail : 1;
+ u16 is_physfn : 1;
+ u16 reserved1 : 1;
u16 mio_addr_avail : 1;
u16 util_str_avail : 1; /* utility string available? */
u16 pfgid : 8; /* pci function group id */
@@ -102,12 +105,16 @@ struct clp_rsp_query_pci {
u16 pchid;
__le32 bar[PCI_STD_NUM_BARS];
u8 pfip[CLP_PFIP_NR_SEGMENTS]; /* pci function internal path */
- u32 : 16;
+ u16 : 12;
+ u16 port : 4;
u8 fmb_len;
u8 pft; /* pci function type */
u64 sdma; /* start dma as */
u64 edma; /* end dma as */
- u32 reserved[11];
+#define ZPCI_RID_MASK_DEVFN 0x00ff
+ u16 rid; /* BUS/DEVFN PCI address */
+ u16 reserved0;
+ u32 reserved[10];
u32 uid; /* user defined id */
u8 util_str[CLP_UTIL_STR_LEN]; /* utility string */
u32 reserved2[16];
diff --git a/arch/s390/include/asm/processor.h b/arch/s390/include/asm/processor.h
index 555d148ccf32..962da04234af 100644
--- a/arch/s390/include/asm/processor.h
+++ b/arch/s390/include/asm/processor.h
@@ -14,17 +14,15 @@
#include <linux/bits.h>
-#define CIF_MCCK_PENDING 0 /* machine check handling is pending */
-#define CIF_ASCE_PRIMARY 1 /* primary asce needs fixup / uaccess */
-#define CIF_ASCE_SECONDARY 2 /* secondary asce needs fixup / uaccess */
-#define CIF_NOHZ_DELAY 3 /* delay HZ disable for a tick */
-#define CIF_FPU 4 /* restore FPU registers */
-#define CIF_IGNORE_IRQ 5 /* ignore interrupt (for udelay) */
-#define CIF_ENABLED_WAIT 6 /* in enabled wait state */
-#define CIF_MCCK_GUEST 7 /* machine check happening in guest */
-#define CIF_DEDICATED_CPU 8 /* this CPU is dedicated */
-
-#define _CIF_MCCK_PENDING BIT(CIF_MCCK_PENDING)
+#define CIF_ASCE_PRIMARY 0 /* primary asce needs fixup / uaccess */
+#define CIF_ASCE_SECONDARY 1 /* secondary asce needs fixup / uaccess */
+#define CIF_NOHZ_DELAY 2 /* delay HZ disable for a tick */
+#define CIF_FPU 3 /* restore FPU registers */
+#define CIF_IGNORE_IRQ 4 /* ignore interrupt (for udelay) */
+#define CIF_ENABLED_WAIT 5 /* in enabled wait state */
+#define CIF_MCCK_GUEST 6 /* machine check happening in guest */
+#define CIF_DEDICATED_CPU 7 /* this CPU is dedicated */
+
#define _CIF_ASCE_PRIMARY BIT(CIF_ASCE_PRIMARY)
#define _CIF_ASCE_SECONDARY BIT(CIF_ASCE_SECONDARY)
#define _CIF_NOHZ_DELAY BIT(CIF_NOHZ_DELAY)
diff --git a/arch/s390/include/asm/qdio.h b/arch/s390/include/asm/qdio.h
index 86a3796e9be8..e69dbf438f99 100644
--- a/arch/s390/include/asm/qdio.h
+++ b/arch/s390/include/asm/qdio.h
@@ -365,34 +365,6 @@ struct qdio_initialize {
struct qdio_outbuf_state *output_sbal_state_array;
};
-/**
- * enum qdio_brinfo_entry_type - type of address entry for qdio_brinfo_desc()
- * @l3_ipv6_addr: entry contains IPv6 address
- * @l3_ipv4_addr: entry contains IPv4 address
- * @l2_addr_lnid: entry contains MAC address and VLAN ID
- */
-enum qdio_brinfo_entry_type {l3_ipv6_addr, l3_ipv4_addr, l2_addr_lnid};
-
-/**
- * struct qdio_brinfo_entry_XXX - Address entry for qdio_brinfo_desc()
- * @nit: Network interface token
- * @addr: Address of one of the three types
- *
- * The struct is passed to the callback function by qdio_brinfo_desc()
- */
-struct qdio_brinfo_entry_l3_ipv6 {
- u64 nit;
- struct { unsigned char _s6_addr[16]; } addr;
-} __packed;
-struct qdio_brinfo_entry_l3_ipv4 {
- u64 nit;
- struct { uint32_t _s_addr; } addr;
-} __packed;
-struct qdio_brinfo_entry_l2 {
- u64 nit;
- struct { u8 mac[6]; u16 lnid; } addr_lnid;
-} __packed;
-
#define QDIO_STATE_INACTIVE 0x00000002 /* after qdio_cleanup */
#define QDIO_STATE_ESTABLISHED 0x00000004 /* after qdio_establish */
#define QDIO_STATE_ACTIVE 0x00000008 /* after qdio_activate */
@@ -423,10 +395,5 @@ extern int qdio_inspect_queue(struct ccw_device *cdev, unsigned int nr,
extern int qdio_shutdown(struct ccw_device *, int);
extern int qdio_free(struct ccw_device *);
extern int qdio_get_ssqd_desc(struct ccw_device *, struct qdio_ssqd_desc *);
-extern int qdio_pnso_brinfo(struct subchannel_id schid,
- int cnc, u16 *response,
- void (*cb)(void *priv, enum qdio_brinfo_entry_type type,
- void *entry),
- void *priv);
#endif /* __QDIO_H__ */
diff --git a/arch/s390/include/asm/smp.h b/arch/s390/include/asm/smp.h
index 231a51e870fe..7326f110d48c 100644
--- a/arch/s390/include/asm/smp.h
+++ b/arch/s390/include/asm/smp.h
@@ -58,5 +58,6 @@ extern int smp_rescan_cpus(void);
extern void __noreturn cpu_die(void);
extern void __cpu_die(unsigned int cpu);
extern int __cpu_disable(void);
+extern void schedule_mcck_handler(void);
#endif /* __ASM_SMP_H */
diff --git a/arch/s390/include/uapi/asm/ipl.h b/arch/s390/include/uapi/asm/ipl.h
index 451ba7d08905..d1ecd5d722a0 100644
--- a/arch/s390/include/uapi/asm/ipl.h
+++ b/arch/s390/include/uapi/asm/ipl.h
@@ -27,6 +27,7 @@ enum ipl_pbt {
IPL_PBT_FCP = 0,
IPL_PBT_SCP_DATA = 1,
IPL_PBT_CCW = 2,
+ IPL_PBT_NVME = 4,
};
/* IPL Parameter Block 0 with common fields */
@@ -67,6 +68,30 @@ struct ipl_pb0_fcp {
#define IPL_PB0_FCP_OPT_IPL 0x10
#define IPL_PB0_FCP_OPT_DUMP 0x20
+/* IPL Parameter Block 0 for NVMe */
+struct ipl_pb0_nvme {
+ __u32 len;
+ __u8 pbt;
+ __u8 reserved1[3];
+ __u8 loadparm[8];
+ __u8 reserved2[304];
+ __u8 opt;
+ __u8 reserved3[3];
+ __u32 fid;
+ __u8 reserved4[12];
+ __u32 nsid;
+ __u8 reserved5[4];
+ __u32 bootprog;
+ __u8 reserved6[12];
+ __u64 br_lba;
+ __u32 scp_data_len;
+ __u8 reserved7[260];
+ __u8 scp_data[];
+} __packed;
+
+#define IPL_PB0_NVME_OPT_IPL 0x10
+#define IPL_PB0_NVME_OPT_DUMP 0x20
+
/* IPL Parameter Block 0 for CCW */
struct ipl_pb0_ccw {
__u32 len;
diff --git a/arch/s390/kernel/Makefile b/arch/s390/kernel/Makefile
index 75f26d775027..a8f136943deb 100644
--- a/arch/s390/kernel/Makefile
+++ b/arch/s390/kernel/Makefile
@@ -33,11 +33,6 @@ CFLAGS_stacktrace.o += -fno-optimize-sibling-calls
CFLAGS_dumpstack.o += -fno-optimize-sibling-calls
CFLAGS_unwind_bc.o += -fno-optimize-sibling-calls
-#
-# Pass UTS_MACHINE for user_regset definition
-#
-CFLAGS_ptrace.o += -DUTS_MACHINE='"$(UTS_MACHINE)"'
-
obj-y := traps.o time.o process.o base.o early.o setup.o idle.o vtime.o
obj-y += processor.o sys_s390.o ptrace.o signal.o cpcmd.o ebcdic.o nmi.o
obj-y += debug.o irq.o ipl.o dis.o diag.o vdso.o
diff --git a/arch/s390/kernel/entry.S b/arch/s390/kernel/entry.S
index 3ae64914bd14..50ff6dd0f995 100644
--- a/arch/s390/kernel/entry.S
+++ b/arch/s390/kernel/entry.S
@@ -55,14 +55,11 @@ _TIF_WORK = (_TIF_SIGPENDING | _TIF_NOTIFY_RESUME | _TIF_NEED_RESCHED | \
_TIF_UPROBE | _TIF_GUARDED_STORAGE | _TIF_PATCH_PENDING)
_TIF_TRACE = (_TIF_SYSCALL_TRACE | _TIF_SYSCALL_AUDIT | _TIF_SECCOMP | \
_TIF_SYSCALL_TRACEPOINT)
-_CIF_WORK = (_CIF_MCCK_PENDING | _CIF_ASCE_PRIMARY | \
- _CIF_ASCE_SECONDARY | _CIF_FPU)
+_CIF_WORK = (_CIF_ASCE_PRIMARY | _CIF_ASCE_SECONDARY | _CIF_FPU)
_PIF_WORK = (_PIF_PER_TRAP | _PIF_SYSCALL_RESTART)
_LPP_OFFSET = __LC_LPP
-#define BASED(name) name-cleanup_critical(%r13)
-
.macro TRACE_IRQS_ON
#ifdef CONFIG_TRACE_IRQFLAGS
basr %r2,%r0
@@ -116,17 +113,39 @@ _LPP_OFFSET = __LC_LPP
.macro SWITCH_ASYNC savearea,timer
tmhh %r8,0x0001 # interrupting from user ?
jnz 2f
+#if IS_ENABLED(CONFIG_KVM)
lgr %r14,%r9
- cghi %r14,__LC_RETURN_LPSWE
- je 0f
- slg %r14,BASED(.Lcritical_start)
- clg %r14,BASED(.Lcritical_length)
- jhe 1f
-0:
+ larl %r13,.Lsie_gmap
+ slgr %r14,%r13
+ lghi %r13,.Lsie_done - .Lsie_gmap
+ clgr %r14,%r13
+ jhe 0f
lghi %r11,\savearea # inside critical section, do cleanup
- brasl %r14,cleanup_critical
- tmhh %r8,0x0001 # retest problem state after cleanup
- jnz 2f
+ brasl %r14,.Lcleanup_sie
+#endif
+0: larl %r13,.Lpsw_idle_exit
+ cgr %r13,%r9
+ jne 1f
+
+ mvc __CLOCK_IDLE_EXIT(8,%r2), __LC_INT_CLOCK
+ mvc __TIMER_IDLE_EXIT(8,%r2), __LC_ASYNC_ENTER_TIMER
+ # account system time going idle
+ ni __LC_CPU_FLAGS+7,255-_CIF_ENABLED_WAIT
+
+ lg %r13,__LC_STEAL_TIMER
+ alg %r13,__CLOCK_IDLE_ENTER(%r2)
+ slg %r13,__LC_LAST_UPDATE_CLOCK
+ stg %r13,__LC_STEAL_TIMER
+
+ mvc __LC_LAST_UPDATE_CLOCK(8),__CLOCK_IDLE_EXIT(%r2)
+
+ lg %r13,__LC_SYSTEM_TIMER
+ alg %r13,__LC_LAST_UPDATE_TIMER
+ slg %r13,__TIMER_IDLE_ENTER(%r2)
+ stg %r13,__LC_SYSTEM_TIMER
+ mvc __LC_LAST_UPDATE_TIMER(8),__TIMER_IDLE_EXIT(%r2)
+
+ nihh %r8,0xfcfd # clear wait state and irq bits
1: lg %r14,__LC_ASYNC_STACK # are we already on the target stack?
slgr %r14,%r15
srag %r14,%r14,STACK_SHIFT
@@ -152,12 +171,30 @@ _LPP_OFFSET = __LC_LPP
mvc __LC_LAST_UPDATE_TIMER(8),\enter_timer
.endm
- .macro REENABLE_IRQS
+ .macro RESTORE_SM_CLEAR_PER
stg %r8,__LC_RETURN_PSW
ni __LC_RETURN_PSW,0xbf
ssm __LC_RETURN_PSW
.endm
+ .macro ENABLE_INTS
+ stosm __SF_EMPTY(%r15),3
+ .endm
+
+ .macro ENABLE_INTS_TRACE
+ TRACE_IRQS_ON
+ ENABLE_INTS
+ .endm
+
+ .macro DISABLE_INTS
+ stnsm __SF_EMPTY(%r15),0xfc
+ .endm
+
+ .macro DISABLE_INTS_TRACE
+ DISABLE_INTS
+ TRACE_IRQS_OFF
+ .endm
+
.macro STCK savearea
#ifdef CONFIG_HAVE_MARCH_Z9_109_FEATURES
.insn s,0xb27c0000,\savearea # store clock fast
@@ -254,8 +291,6 @@ ENTRY(__switch_to)
BR_EX %r14
ENDPROC(__switch_to)
-.L__critical_start:
-
#if IS_ENABLED(CONFIG_KVM)
/*
* sie64a calling convention:
@@ -288,7 +323,6 @@ ENTRY(sie64a)
BPEXIT __SF_SIE_FLAGS(%r15),(_TIF_ISOLATE_BP|_TIF_ISOLATE_BP_GUEST)
.Lsie_entry:
sie 0(%r14)
-.Lsie_exit:
BPOFF
BPENTER __SF_SIE_FLAGS(%r15),(_TIF_ISOLATE_BP|_TIF_ISOLATE_BP_GUEST)
.Lsie_skip:
@@ -341,7 +375,6 @@ EXPORT_SYMBOL(sie_exit)
ENTRY(system_call)
stpt __LC_SYNC_ENTER_TIMER
-.Lsysc_stmg:
stmg %r8,%r15,__LC_SAVE_AREA_SYNC
BPOFF
lg %r12,__LC_CURRENT
@@ -350,7 +383,6 @@ ENTRY(system_call)
.Lsysc_per:
lg %r15,__LC_KERNEL_STACK
la %r11,STACK_FRAME_OVERHEAD(%r15) # pointer to pt_regs
-.Lsysc_vtime:
UPDATE_VTIME %r8,%r9,__LC_SYNC_ENTER_TIMER
BPENTER __TI_flags(%r12),_TIF_ISOLATE_BP
stmg %r0,%r7,__PT_R0(%r11)
@@ -358,6 +390,7 @@ ENTRY(system_call)
mvc __PT_PSW(16,%r11),__LC_SVC_OLD_PSW
mvc __PT_INT_CODE(4,%r11),__LC_SVC_ILC
stg %r14,__PT_FLAGS(%r11)
+ ENABLE_INTS
.Lsysc_do_svc:
# clear user controlled register to prevent speculative use
xgr %r0,%r0
@@ -393,26 +426,26 @@ ENTRY(system_call)
jnz .Lsysc_work
TSTMSK __TI_flags(%r12),_TIF_WORK
jnz .Lsysc_work # check for work
- TSTMSK __LC_CPU_FLAGS,_CIF_WORK
+ TSTMSK __LC_CPU_FLAGS,(_CIF_WORK-_CIF_FPU)
jnz .Lsysc_work
BPEXIT __TI_flags(%r12),_TIF_ISOLATE_BP
.Lsysc_restore:
+ DISABLE_INTS
+ TSTMSK __LC_CPU_FLAGS, _CIF_FPU
+ jz .Lsysc_skip_fpu
+ brasl %r14,load_fpu_regs
+.Lsysc_skip_fpu:
lg %r14,__LC_VDSO_PER_CPU
- lmg %r0,%r10,__PT_R0(%r11)
mvc __LC_RETURN_PSW(16),__PT_PSW(%r11)
-.Lsysc_exit_timer:
stpt __LC_EXIT_TIMER
mvc __VDSO_ECTG_BASE(16,%r14),__LC_EXIT_TIMER
- lmg %r11,%r15,__PT_R11(%r11)
- b __LC_RETURN_LPSWE(%r0)
-.Lsysc_done:
+ lmg %r0,%r15,__PT_R0(%r11)
+ b __LC_RETURN_LPSWE
#
# One of the work bits is on. Find out which one.
#
.Lsysc_work:
- TSTMSK __LC_CPU_FLAGS,_CIF_MCCK_PENDING
- jo .Lsysc_mcck_pending
TSTMSK __TI_flags(%r12),_TIF_NEED_RESCHED
jo .Lsysc_reschedule
TSTMSK __PT_FLAGS(%r11),_PIF_SYSCALL_RESTART
@@ -436,11 +469,9 @@ ENTRY(system_call)
jo .Lsysc_sigpending
TSTMSK __TI_flags(%r12),_TIF_NOTIFY_RESUME
jo .Lsysc_notify_resume
- TSTMSK __LC_CPU_FLAGS,_CIF_FPU
- jo .Lsysc_vxrs
TSTMSK __LC_CPU_FLAGS,(_CIF_ASCE_PRIMARY|_CIF_ASCE_SECONDARY)
jnz .Lsysc_asce
- j .Lsysc_return # beware of critical section cleanup
+ j .Lsysc_return
#
# _TIF_NEED_RESCHED is set, call schedule
@@ -450,13 +481,6 @@ ENTRY(system_call)
jg schedule
#
-# _CIF_MCCK_PENDING is set, call handler
-#
-.Lsysc_mcck_pending:
- larl %r14,.Lsysc_return
- jg s390_handle_mcck # TIF bit will be cleared by handler
-
-#
# _CIF_ASCE_PRIMARY and/or _CIF_ASCE_SECONDARY set, load user space asce
#
.Lsysc_asce:
@@ -475,12 +499,6 @@ ENTRY(system_call)
larl %r14,.Lsysc_return
jg set_fs_fixup
-#
-# CIF_FPU is set, restore floating-point controls and floating-point registers.
-#
-.Lsysc_vxrs:
- larl %r14,.Lsysc_return
- jg load_fpu_regs
#
# _TIF_SIGPENDING is set, call do_signal
@@ -564,7 +582,6 @@ ENTRY(system_call)
jnh .Lsysc_tracenogo
sllg %r8,%r2,3
lg %r9,0(%r8,%r10)
-.Lsysc_tracego:
lmg %r3,%r7,__PT_R3(%r11)
stg %r7,STACK_FRAME_OVERHEAD(%r15)
lg %r2,__PT_ORIG_GPR2(%r11)
@@ -585,8 +602,6 @@ ENTRY(ret_from_fork)
la %r11,STACK_FRAME_OVERHEAD(%r15)
lg %r12,__LC_CURRENT
brasl %r14,schedule_tail
- TRACE_IRQS_ON
- ssm __LC_SVC_NEW_PSW # reenable interrupts
tm __PT_PSW+1(%r11),0x01 # forking a kernel thread ?
jne .Lsysc_tracenogo
# it's a kernel thread
@@ -620,15 +635,16 @@ ENTRY(pgm_check_handler)
lghi %r10,1
0: lg %r12,__LC_CURRENT
lghi %r11,0
- larl %r13,cleanup_critical
lmg %r8,%r9,__LC_PGM_OLD_PSW
tmhh %r8,0x0001 # test problem state bit
jnz 3f # -> fault in user space
#if IS_ENABLED(CONFIG_KVM)
# cleanup critical section for program checks in sie64a
lgr %r14,%r9
- slg %r14,BASED(.Lsie_critical_start)
- clg %r14,BASED(.Lsie_critical_length)
+ larl %r13,.Lsie_gmap
+ slgr %r14,%r13
+ lghi %r13,.Lsie_done - .Lsie_gmap
+ clgr %r14,%r13
jhe 1f
lg %r14,__SF_SIE_CONTROL(%r15) # get control block pointer
ni __SIE_PROG0C+3(%r14),0xfe # no longer in SIE
@@ -680,7 +696,7 @@ ENTRY(pgm_check_handler)
mvc __THREAD_per_address(8,%r14),__LC_PER_ADDRESS
mvc __THREAD_per_cause(2,%r14),__LC_PER_CODE
mvc __THREAD_per_paid(1,%r14),__LC_PER_ACCESS_ID
-6: REENABLE_IRQS
+6: RESTORE_SM_CLEAR_PER
xc __SF_BACKCHAIN(8,%r15),__SF_BACKCHAIN(%r15)
larl %r1,pgm_check_table
llgh %r10,__PT_INT_CODE+2(%r11)
@@ -702,7 +718,7 @@ ENTRY(pgm_check_handler)
# PER event in supervisor state, must be kprobes
#
.Lpgm_kprobe:
- REENABLE_IRQS
+ RESTORE_SM_CLEAR_PER
xc __SF_BACKCHAIN(8,%r15),__SF_BACKCHAIN(%r15)
lgr %r2,%r11 # pass pointer to pt_regs
brasl %r14,do_per_trap
@@ -713,11 +729,10 @@ ENTRY(pgm_check_handler)
#
.Lpgm_svcper:
mvc __LC_RETURN_PSW(8),__LC_SVC_NEW_PSW
- lghi %r13,__TASK_thread
larl %r14,.Lsysc_per
stg %r14,__LC_RETURN_PSW+8
lghi %r14,_PIF_SYSCALL | _PIF_PER_TRAP
- lpswe __LC_RETURN_PSW # branch to .Lsysc_per and enable irqs
+ lpswe __LC_RETURN_PSW # branch to .Lsysc_per
ENDPROC(pgm_check_handler)
/*
@@ -729,7 +744,6 @@ ENTRY(io_int_handler)
BPOFF
stmg %r8,%r15,__LC_SAVE_AREA_ASYNC
lg %r12,__LC_CURRENT
- larl %r13,cleanup_critical
lmg %r8,%r9,__LC_IO_OLD_PSW
SWITCH_ASYNC __LC_SAVE_AREA_ASYNC,__LC_ASYNC_ENTER_TIMER
stmg %r0,%r7,__PT_R0(%r11)
@@ -749,7 +763,12 @@ ENTRY(io_int_handler)
xc __PT_FLAGS(8,%r11),__PT_FLAGS(%r11)
TSTMSK __LC_CPU_FLAGS,_CIF_IGNORE_IRQ
jo .Lio_restore
+#if IS_ENABLED(CONFIG_TRACE_IRQFLAGS)
+ tmhh %r8,0x300
+ jz 1f
TRACE_IRQS_OFF
+1:
+#endif
xc __SF_BACKCHAIN(8,%r15),__SF_BACKCHAIN(%r15)
.Lio_loop:
lgr %r2,%r11 # pass pointer to pt_regs
@@ -767,25 +786,27 @@ ENTRY(io_int_handler)
j .Lio_loop
.Lio_return:
LOCKDEP_SYS_EXIT
- TRACE_IRQS_ON
-.Lio_tif:
TSTMSK __TI_flags(%r12),_TIF_WORK
jnz .Lio_work # there is work to do (signals etc.)
TSTMSK __LC_CPU_FLAGS,_CIF_WORK
jnz .Lio_work
.Lio_restore:
+#if IS_ENABLED(CONFIG_TRACE_IRQFLAGS)
+ tm __PT_PSW(%r11),3
+ jno 0f
+ TRACE_IRQS_ON
+0:
+#endif
lg %r14,__LC_VDSO_PER_CPU
- lmg %r0,%r10,__PT_R0(%r11)
mvc __LC_RETURN_PSW(16),__PT_PSW(%r11)
tm __PT_PSW+1(%r11),0x01 # returning to user ?
jno .Lio_exit_kernel
BPEXIT __TI_flags(%r12),_TIF_ISOLATE_BP
-.Lio_exit_timer:
stpt __LC_EXIT_TIMER
mvc __VDSO_ECTG_BASE(16,%r14),__LC_EXIT_TIMER
.Lio_exit_kernel:
- lmg %r11,%r15,__PT_R11(%r11)
- b __LC_RETURN_LPSWE(%r0)
+ lmg %r0,%r15,__PT_R0(%r11)
+ b __LC_RETURN_LPSWE
.Lio_done:
#
@@ -813,9 +834,6 @@ ENTRY(io_int_handler)
xc __SF_BACKCHAIN(8,%r1),__SF_BACKCHAIN(%r1)
la %r11,STACK_FRAME_OVERHEAD(%r1)
lgr %r15,%r1
- # TRACE_IRQS_ON already done at .Lio_return, call
- # TRACE_IRQS_OFF to keep things symmetrical
- TRACE_IRQS_OFF
brasl %r14,preempt_schedule_irq
j .Lio_return
#else
@@ -835,9 +853,6 @@ ENTRY(io_int_handler)
#
# One of the work bits is on. Find out which one.
#
-.Lio_work_tif:
- TSTMSK __LC_CPU_FLAGS,_CIF_MCCK_PENDING
- jo .Lio_mcck_pending
TSTMSK __TI_flags(%r12),_TIF_NEED_RESCHED
jo .Lio_reschedule
#ifdef CONFIG_LIVEPATCH
@@ -854,15 +869,6 @@ ENTRY(io_int_handler)
jo .Lio_vxrs
TSTMSK __LC_CPU_FLAGS,(_CIF_ASCE_PRIMARY|_CIF_ASCE_SECONDARY)
jnz .Lio_asce
- j .Lio_return # beware of critical section cleanup
-
-#
-# _CIF_MCCK_PENDING is set, call handler
-#
-.Lio_mcck_pending:
- # TRACE_IRQS_ON already done at .Lio_return
- brasl %r14,s390_handle_mcck # TIF bit will be cleared by handler
- TRACE_IRQS_OFF
j .Lio_return
#
@@ -895,23 +901,19 @@ ENTRY(io_int_handler)
# _TIF_GUARDED_STORAGE is set, call guarded_storage_load
#
.Lio_guarded_storage:
- # TRACE_IRQS_ON already done at .Lio_return
- ssm __LC_SVC_NEW_PSW # reenable interrupts
+ ENABLE_INTS_TRACE
lgr %r2,%r11 # pass pointer to pt_regs
brasl %r14,gs_load_bc_cb
- ssm __LC_PGM_NEW_PSW # disable I/O and ext. interrupts
- TRACE_IRQS_OFF
+ DISABLE_INTS_TRACE
j .Lio_return
#
# _TIF_NEED_RESCHED is set, call schedule
#
.Lio_reschedule:
- # TRACE_IRQS_ON already done at .Lio_return
- ssm __LC_SVC_NEW_PSW # reenable interrupts
+ ENABLE_INTS_TRACE
brasl %r14,schedule # call scheduler
- ssm __LC_PGM_NEW_PSW # disable I/O and ext. interrupts
- TRACE_IRQS_OFF
+ DISABLE_INTS_TRACE
j .Lio_return
#
@@ -928,24 +930,20 @@ ENTRY(io_int_handler)
# _TIF_SIGPENDING or is set, call do_signal
#
.Lio_sigpending:
- # TRACE_IRQS_ON already done at .Lio_return
- ssm __LC_SVC_NEW_PSW # reenable interrupts
+ ENABLE_INTS_TRACE
lgr %r2,%r11 # pass pointer to pt_regs
brasl %r14,do_signal
- ssm __LC_PGM_NEW_PSW # disable I/O and ext. interrupts
- TRACE_IRQS_OFF
+ DISABLE_INTS_TRACE
j .Lio_return
#
# _TIF_NOTIFY_RESUME or is set, call do_notify_resume
#
.Lio_notify_resume:
- # TRACE_IRQS_ON already done at .Lio_return
- ssm __LC_SVC_NEW_PSW # reenable interrupts
+ ENABLE_INTS_TRACE
lgr %r2,%r11 # pass pointer to pt_regs
brasl %r14,do_notify_resume
- ssm __LC_PGM_NEW_PSW # disable I/O and ext. interrupts
- TRACE_IRQS_OFF
+ DISABLE_INTS_TRACE
j .Lio_return
ENDPROC(io_int_handler)
@@ -958,7 +956,6 @@ ENTRY(ext_int_handler)
BPOFF
stmg %r8,%r15,__LC_SAVE_AREA_ASYNC
lg %r12,__LC_CURRENT
- larl %r13,cleanup_critical
lmg %r8,%r9,__LC_EXT_OLD_PSW
SWITCH_ASYNC __LC_SAVE_AREA_ASYNC,__LC_ASYNC_ENTER_TIMER
stmg %r0,%r7,__PT_R0(%r11)
@@ -981,7 +978,12 @@ ENTRY(ext_int_handler)
xc __PT_FLAGS(8,%r11),__PT_FLAGS(%r11)
TSTMSK __LC_CPU_FLAGS,_CIF_IGNORE_IRQ
jo .Lio_restore
+#if IS_ENABLED(CONFIG_TRACE_IRQFLAGS)
+ tmhh %r8,0x300
+ jz 1f
TRACE_IRQS_OFF
+1:
+#endif
xc __SF_BACKCHAIN(8,%r15),__SF_BACKCHAIN(%r15)
lgr %r2,%r11 # pass pointer to pt_regs
lghi %r3,EXT_INTERRUPT
@@ -990,11 +992,11 @@ ENTRY(ext_int_handler)
ENDPROC(ext_int_handler)
/*
- * Load idle PSW. The second "half" of this function is in .Lcleanup_idle.
+ * Load idle PSW.
*/
ENTRY(psw_idle)
stg %r3,__SF_EMPTY(%r15)
- larl %r1,.Lpsw_idle_lpsw+4
+ larl %r1,.Lpsw_idle_exit
stg %r1,__SF_EMPTY+8(%r15)
larl %r1,smp_cpu_mtid
llgf %r1,0(%r1)
@@ -1006,10 +1008,9 @@ ENTRY(psw_idle)
BPON
STCK __CLOCK_IDLE_ENTER(%r2)
stpt __TIMER_IDLE_ENTER(%r2)
-.Lpsw_idle_lpsw:
lpswe __SF_EMPTY(%r15)
+.Lpsw_idle_exit:
BR_EX %r14
-.Lpsw_idle_end:
ENDPROC(psw_idle)
/*
@@ -1020,6 +1021,7 @@ ENDPROC(psw_idle)
* of the register contents at return from io or a system call.
*/
ENTRY(save_fpu_regs)
+ stnsm __SF_EMPTY(%r15),0xfc
lg %r2,__LC_CURRENT
aghi %r2,__TASK_thread
TSTMSK __LC_CPU_FLAGS,_CIF_FPU
@@ -1051,6 +1053,7 @@ ENTRY(save_fpu_regs)
.Lsave_fpu_regs_done:
oi __LC_CPU_FLAGS+7,_CIF_FPU
.Lsave_fpu_regs_exit:
+ ssm __SF_EMPTY(%r15)
BR_EX %r14
.Lsave_fpu_regs_end:
ENDPROC(save_fpu_regs)
@@ -1102,8 +1105,6 @@ load_fpu_regs:
.Lload_fpu_regs_end:
ENDPROC(load_fpu_regs)
-.L__critical_end:
-
/*
* Machine check handler routines
*/
@@ -1116,7 +1117,6 @@ ENTRY(mcck_int_handler)
lam %a0,%a15,__LC_AREGS_SAVE_AREA-4095(%r1) # validate acrs
lmg %r0,%r15,__LC_GPREGS_SAVE_AREA-4095(%r1)# validate gprs
lg %r12,__LC_CURRENT
- larl %r13,cleanup_critical
lmg %r8,%r9,__LC_MCK_OLD_PSW
TSTMSK __LC_MCCK_CODE,MCCK_CODE_SYSTEM_DAMAGE
jo .Lmcck_panic # yes -> rest of mcck code invalid
@@ -1202,15 +1202,13 @@ ENTRY(mcck_int_handler)
xc __SF_BACKCHAIN(8,%r15),__SF_BACKCHAIN(%r15)
lgr %r2,%r11 # pass pointer to pt_regs
brasl %r14,s390_do_machine_check
- tm __PT_PSW+1(%r11),0x01 # returning to user ?
- jno .Lmcck_return
+ cghi %r2,0
+ je .Lmcck_return
lg %r1,__LC_KERNEL_STACK # switch to kernel stack
mvc STACK_FRAME_OVERHEAD(__PT_SIZE,%r1),0(%r11)
xc __SF_BACKCHAIN(8,%r1),__SF_BACKCHAIN(%r1)
la %r11,STACK_FRAME_OVERHEAD(%r1)
lgr %r15,%r1
- TSTMSK __LC_CPU_FLAGS,_CIF_MCCK_PENDING
- jno .Lmcck_return
TRACE_IRQS_OFF
brasl %r14,s390_handle_mcck
TRACE_IRQS_ON
@@ -1280,265 +1278,23 @@ ENTRY(stack_overflow)
ENDPROC(stack_overflow)
#endif
-ENTRY(cleanup_critical)
- cghi %r9,__LC_RETURN_LPSWE
- je .Lcleanup_lpswe
-#if IS_ENABLED(CONFIG_KVM)
- clg %r9,BASED(.Lcleanup_table_sie) # .Lsie_gmap
- jl 0f
- clg %r9,BASED(.Lcleanup_table_sie+8)# .Lsie_done
- jl .Lcleanup_sie
-#endif
- clg %r9,BASED(.Lcleanup_table) # system_call
- jl 0f
- clg %r9,BASED(.Lcleanup_table+8) # .Lsysc_do_svc
- jl .Lcleanup_system_call
- clg %r9,BASED(.Lcleanup_table+16) # .Lsysc_tif
- jl 0f
- clg %r9,BASED(.Lcleanup_table+24) # .Lsysc_restore
- jl .Lcleanup_sysc_tif
- clg %r9,BASED(.Lcleanup_table+32) # .Lsysc_done
- jl .Lcleanup_sysc_restore
- clg %r9,BASED(.Lcleanup_table+40) # .Lio_tif
- jl 0f
- clg %r9,BASED(.Lcleanup_table+48) # .Lio_restore
- jl .Lcleanup_io_tif
- clg %r9,BASED(.Lcleanup_table+56) # .Lio_done
- jl .Lcleanup_io_restore
- clg %r9,BASED(.Lcleanup_table+64) # psw_idle
- jl 0f
- clg %r9,BASED(.Lcleanup_table+72) # .Lpsw_idle_end
- jl .Lcleanup_idle
- clg %r9,BASED(.Lcleanup_table+80) # save_fpu_regs
- jl 0f
- clg %r9,BASED(.Lcleanup_table+88) # .Lsave_fpu_regs_end
- jl .Lcleanup_save_fpu_regs
- clg %r9,BASED(.Lcleanup_table+96) # load_fpu_regs
- jl 0f
- clg %r9,BASED(.Lcleanup_table+104) # .Lload_fpu_regs_end
- jl .Lcleanup_load_fpu_regs
-0: BR_EX %r14,%r11
-ENDPROC(cleanup_critical)
-
- .align 8
-.Lcleanup_table:
- .quad system_call
- .quad .Lsysc_do_svc
- .quad .Lsysc_tif
- .quad .Lsysc_restore
- .quad .Lsysc_done
- .quad .Lio_tif
- .quad .Lio_restore
- .quad .Lio_done
- .quad psw_idle
- .quad .Lpsw_idle_end
- .quad save_fpu_regs
- .quad .Lsave_fpu_regs_end
- .quad load_fpu_regs
- .quad .Lload_fpu_regs_end
-
#if IS_ENABLED(CONFIG_KVM)
-.Lcleanup_table_sie:
- .quad .Lsie_gmap
- .quad .Lsie_done
-
.Lcleanup_sie:
- cghi %r11,__LC_SAVE_AREA_ASYNC #Is this in normal interrupt?
- je 1f
- slg %r9,BASED(.Lsie_crit_mcck_start)
- clg %r9,BASED(.Lsie_crit_mcck_length)
- jh 1f
- oi __LC_CPU_FLAGS+7, _CIF_MCCK_GUEST
-1: BPENTER __SF_SIE_FLAGS(%r15),(_TIF_ISOLATE_BP|_TIF_ISOLATE_BP_GUEST)
+ cghi %r11,__LC_SAVE_AREA_ASYNC #Is this in normal interrupt?
+ je 1f
+ larl %r13,.Lsie_entry
+ slgr %r9,%r13
+ larl %r13,.Lsie_skip
+ clgr %r9,%r13
+ jh 1f
+ oi __LC_CPU_FLAGS+7, _CIF_MCCK_GUEST
+1: BPENTER __SF_SIE_FLAGS(%r15),(_TIF_ISOLATE_BP|_TIF_ISOLATE_BP_GUEST)
lg %r9,__SF_SIE_CONTROL(%r15) # get control block pointer
ni __SIE_PROG0C+3(%r9),0xfe # no longer in SIE
lctlg %c1,%c1,__LC_USER_ASCE # load primary asce
larl %r9,sie_exit # skip forward to sie_exit
BR_EX %r14,%r11
-#endif
-.Lcleanup_system_call:
- # check if stpt has been executed
- clg %r9,BASED(.Lcleanup_system_call_insn)
- jh 0f
- mvc __LC_SYNC_ENTER_TIMER(8),__LC_ASYNC_ENTER_TIMER
- cghi %r11,__LC_SAVE_AREA_ASYNC
- je 0f
- mvc __LC_SYNC_ENTER_TIMER(8),__LC_MCCK_ENTER_TIMER
-0: # check if stmg has been executed
- clg %r9,BASED(.Lcleanup_system_call_insn+8)
- jh 0f
- mvc __LC_SAVE_AREA_SYNC(64),0(%r11)
-0: # check if base register setup + TIF bit load has been done
- clg %r9,BASED(.Lcleanup_system_call_insn+16)
- jhe 0f
- # set up saved register r12 task struct pointer
- stg %r12,32(%r11)
- # set up saved register r13 __TASK_thread offset
- mvc 40(8,%r11),BASED(.Lcleanup_system_call_const)
-0: # check if the user time update has been done
- clg %r9,BASED(.Lcleanup_system_call_insn+24)
- jh 0f
- lg %r15,__LC_EXIT_TIMER
- slg %r15,__LC_SYNC_ENTER_TIMER
- alg %r15,__LC_USER_TIMER
- stg %r15,__LC_USER_TIMER
-0: # check if the system time update has been done
- clg %r9,BASED(.Lcleanup_system_call_insn+32)
- jh 0f
- lg %r15,__LC_LAST_UPDATE_TIMER
- slg %r15,__LC_EXIT_TIMER
- alg %r15,__LC_SYSTEM_TIMER
- stg %r15,__LC_SYSTEM_TIMER
-0: # update accounting time stamp
- mvc __LC_LAST_UPDATE_TIMER(8),__LC_SYNC_ENTER_TIMER
- BPENTER __TI_flags(%r12),_TIF_ISOLATE_BP
- # set up saved register r11
- lg %r15,__LC_KERNEL_STACK
- la %r9,STACK_FRAME_OVERHEAD(%r15)
- stg %r9,24(%r11) # r11 pt_regs pointer
- # fill pt_regs
- mvc __PT_R8(64,%r9),__LC_SAVE_AREA_SYNC
- stmg %r0,%r7,__PT_R0(%r9)
- mvc __PT_PSW(16,%r9),__LC_SVC_OLD_PSW
- mvc __PT_INT_CODE(4,%r9),__LC_SVC_ILC
- xc __PT_FLAGS(8,%r9),__PT_FLAGS(%r9)
- mvi __PT_FLAGS+7(%r9),_PIF_SYSCALL
- # setup saved register r15
- stg %r15,56(%r11) # r15 stack pointer
- # set new psw address and exit
- larl %r9,.Lsysc_do_svc
- BR_EX %r14,%r11
-.Lcleanup_system_call_insn:
- .quad system_call
- .quad .Lsysc_stmg
- .quad .Lsysc_per
- .quad .Lsysc_vtime+36
- .quad .Lsysc_vtime+42
-.Lcleanup_system_call_const:
- .quad __TASK_thread
-
-.Lcleanup_sysc_tif:
- larl %r9,.Lsysc_tif
- BR_EX %r14,%r11
-
-.Lcleanup_sysc_restore:
- # check if stpt has been executed
- clg %r9,BASED(.Lcleanup_sysc_restore_insn)
- jh 0f
- mvc __LC_EXIT_TIMER(8),__LC_ASYNC_ENTER_TIMER
- cghi %r11,__LC_SAVE_AREA_ASYNC
- je 0f
- mvc __LC_EXIT_TIMER(8),__LC_MCCK_ENTER_TIMER
-0: clg %r9,BASED(.Lcleanup_sysc_restore_insn+8)
- je 1f
- lg %r9,24(%r11) # get saved pointer to pt_regs
- mvc __LC_RETURN_PSW(16),__PT_PSW(%r9)
- mvc 0(64,%r11),__PT_R8(%r9)
- lmg %r0,%r7,__PT_R0(%r9)
-.Lcleanup_lpswe:
-1: lmg %r8,%r9,__LC_RETURN_PSW
- BR_EX %r14,%r11
-.Lcleanup_sysc_restore_insn:
- .quad .Lsysc_exit_timer
- .quad .Lsysc_done - 4
-
-.Lcleanup_io_tif:
- larl %r9,.Lio_tif
- BR_EX %r14,%r11
-
-.Lcleanup_io_restore:
- # check if stpt has been executed
- clg %r9,BASED(.Lcleanup_io_restore_insn)
- jh 0f
- mvc __LC_EXIT_TIMER(8),__LC_MCCK_ENTER_TIMER
-0: clg %r9,BASED(.Lcleanup_io_restore_insn+8)
- je 1f
- lg %r9,24(%r11) # get saved r11 pointer to pt_regs
- mvc __LC_RETURN_PSW(16),__PT_PSW(%r9)
- mvc 0(64,%r11),__PT_R8(%r9)
- lmg %r0,%r7,__PT_R0(%r9)
-1: lmg %r8,%r9,__LC_RETURN_PSW
- BR_EX %r14,%r11
-.Lcleanup_io_restore_insn:
- .quad .Lio_exit_timer
- .quad .Lio_done - 4
-
-.Lcleanup_idle:
- ni __LC_CPU_FLAGS+7,255-_CIF_ENABLED_WAIT
- # copy interrupt clock & cpu timer
- mvc __CLOCK_IDLE_EXIT(8,%r2),__LC_INT_CLOCK
- mvc __TIMER_IDLE_EXIT(8,%r2),__LC_ASYNC_ENTER_TIMER
- cghi %r11,__LC_SAVE_AREA_ASYNC
- je 0f
- mvc __CLOCK_IDLE_EXIT(8,%r2),__LC_MCCK_CLOCK
- mvc __TIMER_IDLE_EXIT(8,%r2),__LC_MCCK_ENTER_TIMER
-0: # check if stck & stpt have been executed
- clg %r9,BASED(.Lcleanup_idle_insn)
- jhe 1f
- mvc __CLOCK_IDLE_ENTER(8,%r2),__CLOCK_IDLE_EXIT(%r2)
- mvc __TIMER_IDLE_ENTER(8,%r2),__TIMER_IDLE_EXIT(%r2)
-1: # calculate idle cycles
- clg %r9,BASED(.Lcleanup_idle_insn)
- jl 3f
- larl %r1,smp_cpu_mtid
- llgf %r1,0(%r1)
- ltgr %r1,%r1
- jz 3f
- .insn rsy,0xeb0000000017,%r1,5,__SF_EMPTY+80(%r15)
- larl %r3,mt_cycles
- ag %r3,__LC_PERCPU_OFFSET
- la %r4,__SF_EMPTY+16(%r15)
-2: lg %r0,0(%r3)
- slg %r0,0(%r4)
- alg %r0,64(%r4)
- stg %r0,0(%r3)
- la %r3,8(%r3)
- la %r4,8(%r4)
- brct %r1,2b
-3: # account system time going idle
- lg %r9,__LC_STEAL_TIMER
- alg %r9,__CLOCK_IDLE_ENTER(%r2)
- slg %r9,__LC_LAST_UPDATE_CLOCK
- stg %r9,__LC_STEAL_TIMER
- mvc __LC_LAST_UPDATE_CLOCK(8),__CLOCK_IDLE_EXIT(%r2)
- lg %r9,__LC_SYSTEM_TIMER
- alg %r9,__LC_LAST_UPDATE_TIMER
- slg %r9,__TIMER_IDLE_ENTER(%r2)
- stg %r9,__LC_SYSTEM_TIMER
- mvc __LC_LAST_UPDATE_TIMER(8),__TIMER_IDLE_EXIT(%r2)
- # prepare return psw
- nihh %r8,0xfcfd # clear irq & wait state bits
- lg %r9,48(%r11) # return from psw_idle
- BR_EX %r14,%r11
-.Lcleanup_idle_insn:
- .quad .Lpsw_idle_lpsw
-
-.Lcleanup_save_fpu_regs:
- larl %r9,save_fpu_regs
- BR_EX %r14,%r11
-
-.Lcleanup_load_fpu_regs:
- larl %r9,load_fpu_regs
- BR_EX %r14,%r11
-
-/*
- * Integer constants
- */
- .align 8
-.Lcritical_start:
- .quad .L__critical_start
-.Lcritical_length:
- .quad .L__critical_end - .L__critical_start
-#if IS_ENABLED(CONFIG_KVM)
-.Lsie_critical_start:
- .quad .Lsie_gmap
-.Lsie_critical_length:
- .quad .Lsie_done - .Lsie_gmap
-.Lsie_crit_mcck_start:
- .quad .Lsie_entry
-.Lsie_crit_mcck_length:
- .quad .Lsie_skip - .Lsie_entry
#endif
.section .rodata, "a"
#define SYSCALL(esame,emu) .quad __s390x_ ## esame
diff --git a/arch/s390/kernel/ftrace.c b/arch/s390/kernel/ftrace.c
index 4cd9b1ada834..44e01dd1e624 100644
--- a/arch/s390/kernel/ftrace.c
+++ b/arch/s390/kernel/ftrace.c
@@ -72,22 +72,6 @@ static inline void ftrace_generate_orig_insn(struct ftrace_insn *insn)
#endif
}
-static inline void ftrace_generate_kprobe_nop_insn(struct ftrace_insn *insn)
-{
-#ifdef CONFIG_KPROBES
- insn->opc = BREAKPOINT_INSTRUCTION;
- insn->disp = KPROBE_ON_FTRACE_NOP;
-#endif
-}
-
-static inline void ftrace_generate_kprobe_call_insn(struct ftrace_insn *insn)
-{
-#ifdef CONFIG_KPROBES
- insn->opc = BREAKPOINT_INSTRUCTION;
- insn->disp = KPROBE_ON_FTRACE_CALL;
-#endif
-}
-
int ftrace_modify_call(struct dyn_ftrace *rec, unsigned long old_addr,
unsigned long addr)
{
diff --git a/arch/s390/kernel/idle.c b/arch/s390/kernel/idle.c
index 8f8456816d83..0d7fbdfe995a 100644
--- a/arch/s390/kernel/idle.c
+++ b/arch/s390/kernel/idle.c
@@ -24,19 +24,19 @@ void enabled_wait(void)
{
struct s390_idle_data *idle = this_cpu_ptr(&s390_idle);
unsigned long long idle_time;
- unsigned long psw_mask;
+ unsigned long psw_mask, flags;
- trace_hardirqs_on();
/* Wait for external, I/O or machine check interrupt. */
psw_mask = PSW_KERNEL_BITS | PSW_MASK_WAIT | PSW_MASK_DAT |
PSW_MASK_IO | PSW_MASK_EXT | PSW_MASK_MCHECK;
clear_cpu_flag(CIF_NOHZ_DELAY);
+ local_irq_save(flags);
/* Call the assembler magic in entry.S */
psw_idle(idle, psw_mask);
+ local_irq_restore(flags);
- trace_hardirqs_off();
/* Account time spent with enabled wait psw loaded as idle time. */
write_seqcount_begin(&idle->seqcount);
@@ -118,22 +118,16 @@ u64 arch_cpu_idle_time(int cpu)
void arch_cpu_idle_enter(void)
{
- local_mcck_disable();
}
void arch_cpu_idle(void)
{
- if (!test_cpu_flag(CIF_MCCK_PENDING))
- /* Halt the cpu and keep track of cpu time accounting. */
- enabled_wait();
+ enabled_wait();
local_irq_enable();
}
void arch_cpu_idle_exit(void)
{
- local_mcck_enable();
- if (test_cpu_flag(CIF_MCCK_PENDING))
- s390_handle_mcck();
}
void arch_cpu_idle_dead(void)
diff --git a/arch/s390/kernel/ipl.c b/arch/s390/kernel/ipl.c
index 4a71061974fd..ccea9a245867 100644
--- a/arch/s390/kernel/ipl.c
+++ b/arch/s390/kernel/ipl.c
@@ -39,6 +39,7 @@
#define IPL_CCW_STR "ccw"
#define IPL_FCP_STR "fcp"
#define IPL_FCP_DUMP_STR "fcp_dump"
+#define IPL_NVME_STR "nvme"
#define IPL_NSS_STR "nss"
#define DUMP_CCW_STR "ccw"
@@ -93,6 +94,8 @@ static char *ipl_type_str(enum ipl_type type)
return IPL_FCP_DUMP_STR;
case IPL_TYPE_NSS:
return IPL_NSS_STR;
+ case IPL_TYPE_NVME:
+ return IPL_NVME_STR;
case IPL_TYPE_UNKNOWN:
default:
return IPL_UNKNOWN_STR;
@@ -133,6 +136,7 @@ static int reipl_capabilities = IPL_TYPE_UNKNOWN;
static enum ipl_type reipl_type = IPL_TYPE_UNKNOWN;
static struct ipl_parameter_block *reipl_block_fcp;
+static struct ipl_parameter_block *reipl_block_nvme;
static struct ipl_parameter_block *reipl_block_ccw;
static struct ipl_parameter_block *reipl_block_nss;
static struct ipl_parameter_block *reipl_block_actual;
@@ -261,6 +265,8 @@ static __init enum ipl_type get_ipl_type(void)
return IPL_TYPE_FCP_DUMP;
else
return IPL_TYPE_FCP;
+ case IPL_PBT_NVME:
+ return IPL_TYPE_NVME;
}
return IPL_TYPE_UNKNOWN;
}
@@ -317,6 +323,8 @@ static ssize_t sys_ipl_device_show(struct kobject *kobj,
case IPL_TYPE_FCP:
case IPL_TYPE_FCP_DUMP:
return sprintf(page, "0.0.%04x\n", ipl_block.fcp.devno);
+ case IPL_TYPE_NVME:
+ return sprintf(page, "%08ux\n", ipl_block.nvme.fid);
default:
return 0;
}
@@ -345,15 +353,35 @@ static ssize_t ipl_scp_data_read(struct file *filp, struct kobject *kobj,
return memory_read_from_buffer(buf, count, &off, scp_data, size);
}
+
+static ssize_t ipl_nvme_scp_data_read(struct file *filp, struct kobject *kobj,
+ struct bin_attribute *attr, char *buf,
+ loff_t off, size_t count)
+{
+ unsigned int size = ipl_block.nvme.scp_data_len;
+ void *scp_data = &ipl_block.nvme.scp_data;
+
+ return memory_read_from_buffer(buf, count, &off, scp_data, size);
+}
+
static struct bin_attribute ipl_scp_data_attr =
__BIN_ATTR(scp_data, S_IRUGO, ipl_scp_data_read, NULL, PAGE_SIZE);
+static struct bin_attribute ipl_nvme_scp_data_attr =
+ __BIN_ATTR(scp_data, S_IRUGO, ipl_nvme_scp_data_read, NULL, PAGE_SIZE);
+
static struct bin_attribute *ipl_fcp_bin_attrs[] = {
&ipl_parameter_attr,
&ipl_scp_data_attr,
NULL,
};
+static struct bin_attribute *ipl_nvme_bin_attrs[] = {
+ &ipl_parameter_attr,
+ &ipl_nvme_scp_data_attr,
+ NULL,
+};
+
/* FCP ipl device attributes */
DEFINE_IPL_ATTR_RO(ipl_fcp, wwpn, "0x%016llx\n",
@@ -365,6 +393,16 @@ DEFINE_IPL_ATTR_RO(ipl_fcp, bootprog, "%lld\n",
DEFINE_IPL_ATTR_RO(ipl_fcp, br_lba, "%lld\n",
(unsigned long long)ipl_block.fcp.br_lba);
+/* NVMe ipl device attributes */
+DEFINE_IPL_ATTR_RO(ipl_nvme, fid, "0x%08llx\n",
+ (unsigned long long)ipl_block.nvme.fid);
+DEFINE_IPL_ATTR_RO(ipl_nvme, nsid, "0x%08llx\n",
+ (unsigned long long)ipl_block.nvme.nsid);
+DEFINE_IPL_ATTR_RO(ipl_nvme, bootprog, "%lld\n",
+ (unsigned long long)ipl_block.nvme.bootprog);
+DEFINE_IPL_ATTR_RO(ipl_nvme, br_lba, "%lld\n",
+ (unsigned long long)ipl_block.nvme.br_lba);
+
static ssize_t ipl_ccw_loadparm_show(struct kobject *kobj,
struct kobj_attribute *attr, char *page)
{
@@ -399,6 +437,24 @@ static struct attribute_group ipl_fcp_attr_group = {
.bin_attrs = ipl_fcp_bin_attrs,
};
+static struct attribute *ipl_nvme_attrs[] = {
+ &sys_ipl_type_attr.attr,
+ &sys_ipl_nvme_fid_attr.attr,
+ &sys_ipl_nvme_nsid_attr.attr,
+ &sys_ipl_nvme_bootprog_attr.attr,
+ &sys_ipl_nvme_br_lba_attr.attr,
+ &sys_ipl_ccw_loadparm_attr.attr,
+ &sys_ipl_secure_attr.attr,
+ &sys_ipl_has_secure_attr.attr,
+ NULL,
+};
+
+static struct attribute_group ipl_nvme_attr_group = {
+ .attrs = ipl_nvme_attrs,
+ .bin_attrs = ipl_nvme_bin_attrs,
+};
+
+
/* CCW ipl device attributes */
static struct attribute *ipl_ccw_attrs_vm[] = {
@@ -474,6 +530,9 @@ static int __init ipl_init(void)
case IPL_TYPE_FCP_DUMP:
rc = sysfs_create_group(&ipl_kset->kobj, &ipl_fcp_attr_group);
break;
+ case IPL_TYPE_NVME:
+ rc = sysfs_create_group(&ipl_kset->kobj, &ipl_nvme_attr_group);
+ break;
default:
rc = sysfs_create_group(&ipl_kset->kobj,
&ipl_unknown_attr_group);
@@ -727,6 +786,93 @@ static struct attribute_group reipl_fcp_attr_group = {
static struct kobj_attribute sys_reipl_fcp_clear_attr =
__ATTR(clear, 0644, reipl_fcp_clear_show, reipl_fcp_clear_store);
+/* NVME reipl device attributes */
+
+static ssize_t reipl_nvme_scpdata_read(struct file *filp, struct kobject *kobj,
+ struct bin_attribute *attr,
+ char *buf, loff_t off, size_t count)
+{
+ size_t size = reipl_block_nvme->nvme.scp_data_len;
+ void *scp_data = reipl_block_nvme->nvme.scp_data;
+
+ return memory_read_from_buffer(buf, count, &off, scp_data, size);
+}
+
+static ssize_t reipl_nvme_scpdata_write(struct file *filp, struct kobject *kobj,
+ struct bin_attribute *attr,
+ char *buf, loff_t off, size_t count)
+{
+ size_t scpdata_len = count;
+ size_t padding;
+
+ if (off)
+ return -EINVAL;
+
+ memcpy(reipl_block_nvme->nvme.scp_data, buf, count);
+ if (scpdata_len % 8) {
+ padding = 8 - (scpdata_len % 8);
+ memset(reipl_block_nvme->nvme.scp_data + scpdata_len,
+ 0, padding);
+ scpdata_len += padding;
+ }
+
+ reipl_block_nvme->hdr.len = IPL_BP_FCP_LEN + scpdata_len;
+ reipl_block_nvme->nvme.len = IPL_BP0_FCP_LEN + scpdata_len;
+ reipl_block_nvme->nvme.scp_data_len = scpdata_len;
+
+ return count;
+}
+
+static struct bin_attribute sys_reipl_nvme_scp_data_attr =
+ __BIN_ATTR(scp_data, (S_IRUGO | S_IWUSR), reipl_nvme_scpdata_read,
+ reipl_nvme_scpdata_write, DIAG308_SCPDATA_SIZE);
+
+static struct bin_attribute *reipl_nvme_bin_attrs[] = {
+ &sys_reipl_nvme_scp_data_attr,
+ NULL,
+};
+
+DEFINE_IPL_ATTR_RW(reipl_nvme, fid, "0x%08llx\n", "%llx\n",
+ reipl_block_nvme->nvme.fid);
+DEFINE_IPL_ATTR_RW(reipl_nvme, nsid, "0x%08llx\n", "%llx\n",
+ reipl_block_nvme->nvme.nsid);
+DEFINE_IPL_ATTR_RW(reipl_nvme, bootprog, "%lld\n", "%lld\n",
+ reipl_block_nvme->nvme.bootprog);
+DEFINE_IPL_ATTR_RW(reipl_nvme, br_lba, "%lld\n", "%lld\n",
+ reipl_block_nvme->nvme.br_lba);
+
+/* nvme wrapper */
+static ssize_t reipl_nvme_loadparm_show(struct kobject *kobj,
+ struct kobj_attribute *attr, char *page)
+{
+ return reipl_generic_loadparm_show(reipl_block_nvme, page);
+}
+
+static ssize_t reipl_nvme_loadparm_store(struct kobject *kobj,
+ struct kobj_attribute *attr,
+ const char *buf, size_t len)
+{
+ return reipl_generic_loadparm_store(reipl_block_nvme, buf, len);
+}
+
+static struct kobj_attribute sys_reipl_nvme_loadparm_attr =
+ __ATTR(loadparm, S_IRUGO | S_IWUSR, reipl_nvme_loadparm_show,
+ reipl_nvme_loadparm_store);
+
+static struct attribute *reipl_nvme_attrs[] = {
+ &sys_reipl_nvme_fid_attr.attr,
+ &sys_reipl_nvme_nsid_attr.attr,
+ &sys_reipl_nvme_bootprog_attr.attr,
+ &sys_reipl_nvme_br_lba_attr.attr,
+ &sys_reipl_nvme_loadparm_attr.attr,
+ NULL,
+};
+
+static struct attribute_group reipl_nvme_attr_group = {
+ .attrs = reipl_nvme_attrs,
+ .bin_attrs = reipl_nvme_bin_attrs
+};
+
/* CCW reipl device attributes */
DEFINE_IPL_CCW_ATTR_RW(reipl_ccw, device, reipl_block_ccw->ccw);
@@ -891,6 +1037,9 @@ static int reipl_set_type(enum ipl_type type)
case IPL_TYPE_FCP:
reipl_block_actual = reipl_block_fcp;
break;
+ case IPL_TYPE_NVME:
+ reipl_block_actual = reipl_block_nvme;
+ break;
case IPL_TYPE_NSS:
reipl_block_actual = reipl_block_nss;
break;
@@ -917,6 +1066,8 @@ static ssize_t reipl_type_store(struct kobject *kobj,
rc = reipl_set_type(IPL_TYPE_CCW);
else if (strncmp(buf, IPL_FCP_STR, strlen(IPL_FCP_STR)) == 0)
rc = reipl_set_type(IPL_TYPE_FCP);
+ else if (strncmp(buf, IPL_NVME_STR, strlen(IPL_NVME_STR)) == 0)
+ rc = reipl_set_type(IPL_TYPE_NVME);
else if (strncmp(buf, IPL_NSS_STR, strlen(IPL_NSS_STR)) == 0)
rc = reipl_set_type(IPL_TYPE_NSS);
return (rc != 0) ? rc : len;
@@ -927,6 +1078,7 @@ static struct kobj_attribute reipl_type_attr =
static struct kset *reipl_kset;
static struct kset *reipl_fcp_kset;
+static struct kset *reipl_nvme_kset;
static void __reipl_run(void *unused)
{
@@ -945,6 +1097,10 @@ static void __reipl_run(void *unused)
else
diag308(DIAG308_LOAD_NORMAL, NULL);
break;
+ case IPL_TYPE_NVME:
+ diag308(DIAG308_SET, reipl_block_nvme);
+ diag308(DIAG308_LOAD_CLEAR, NULL);
+ break;
case IPL_TYPE_NSS:
diag308(DIAG308_SET, reipl_block_nss);
diag308(DIAG308_LOAD_CLEAR, NULL);
@@ -1093,6 +1249,49 @@ out1:
return rc;
}
+static int __init reipl_nvme_init(void)
+{
+ int rc;
+
+ reipl_block_nvme = (void *) get_zeroed_page(GFP_KERNEL);
+ if (!reipl_block_nvme)
+ return -ENOMEM;
+
+ /* sysfs: create kset for mixing attr group and bin attrs */
+ reipl_nvme_kset = kset_create_and_add(IPL_NVME_STR, NULL,
+ &reipl_kset->kobj);
+ if (!reipl_nvme_kset) {
+ free_page((unsigned long) reipl_block_nvme);
+ return -ENOMEM;
+ }
+
+ rc = sysfs_create_group(&reipl_nvme_kset->kobj, &reipl_nvme_attr_group);
+ if (rc) {
+ kset_unregister(reipl_nvme_kset);
+ free_page((unsigned long) reipl_block_nvme);
+ return rc;
+ }
+
+ if (ipl_info.type == IPL_TYPE_NVME) {
+ memcpy(reipl_block_nvme, &ipl_block, sizeof(ipl_block));
+ /*
+ * Fix loadparm: There are systems where the (SCSI) LOADPARM
+ * is invalid in the IPL parameter block, so take it
+ * always from sclp_ipl_info.
+ */
+ memcpy(reipl_block_nvme->nvme.loadparm, sclp_ipl_info.loadparm,
+ LOADPARM_LEN);
+ } else {
+ reipl_block_nvme->hdr.len = IPL_BP_NVME_LEN;
+ reipl_block_nvme->hdr.version = IPL_PARM_BLOCK_VERSION;
+ reipl_block_nvme->nvme.len = IPL_BP0_NVME_LEN;
+ reipl_block_nvme->nvme.pbt = IPL_PBT_NVME;
+ reipl_block_nvme->nvme.opt = IPL_PB0_NVME_OPT_IPL;
+ }
+ reipl_capabilities |= IPL_TYPE_NVME;
+ return 0;
+}
+
static int __init reipl_type_init(void)
{
enum ipl_type reipl_type = ipl_info.type;
@@ -1108,6 +1307,9 @@ static int __init reipl_type_init(void)
if (reipl_block->pb0_hdr.pbt == IPL_PBT_FCP) {
memcpy(reipl_block_fcp, reipl_block, size);
reipl_type = IPL_TYPE_FCP;
+ } else if (reipl_block->pb0_hdr.pbt == IPL_PBT_NVME) {
+ memcpy(reipl_block_nvme, reipl_block, size);
+ reipl_type = IPL_TYPE_NVME;
} else if (reipl_block->pb0_hdr.pbt == IPL_PBT_CCW) {
memcpy(reipl_block_ccw, reipl_block, size);
reipl_type = IPL_TYPE_CCW;
@@ -1134,6 +1336,9 @@ static int __init reipl_init(void)
rc = reipl_fcp_init();
if (rc)
return rc;
+ rc = reipl_nvme_init();
+ if (rc)
+ return rc;
rc = reipl_nss_init();
if (rc)
return rc;
@@ -1750,6 +1955,10 @@ void __init setup_ipl(void)
ipl_info.data.fcp.wwpn = ipl_block.fcp.wwpn;
ipl_info.data.fcp.lun = ipl_block.fcp.lun;
break;
+ case IPL_TYPE_NVME:
+ ipl_info.data.nvme.fid = ipl_block.nvme.fid;
+ ipl_info.data.nvme.nsid = ipl_block.nvme.nsid;
+ break;
case IPL_TYPE_NSS:
case IPL_TYPE_UNKNOWN:
/* We have no info to copy */
diff --git a/arch/s390/kernel/nmi.c b/arch/s390/kernel/nmi.c
index 0a487fae763e..86c8d5370e7f 100644
--- a/arch/s390/kernel/nmi.c
+++ b/arch/s390/kernel/nmi.c
@@ -148,7 +148,6 @@ void s390_handle_mcck(void)
local_mcck_disable();
mcck = *this_cpu_ptr(&cpu_mcck);
memset(this_cpu_ptr(&cpu_mcck), 0, sizeof(mcck));
- clear_cpu_flag(CIF_MCCK_PENDING);
local_mcck_enable();
local_irq_restore(flags);
@@ -333,7 +332,7 @@ NOKPROBE_SYMBOL(s390_backup_mcck_info);
/*
* machine check handler.
*/
-void notrace s390_do_machine_check(struct pt_regs *regs)
+int notrace s390_do_machine_check(struct pt_regs *regs)
{
static int ipd_count;
static DEFINE_SPINLOCK(ipd_lock);
@@ -342,6 +341,7 @@ void notrace s390_do_machine_check(struct pt_regs *regs)
unsigned long long tmp;
union mci mci;
unsigned long mcck_dam_code;
+ int mcck_pending = 0;
nmi_enter();
inc_irq_stat(NMI_NMI);
@@ -400,7 +400,7 @@ void notrace s390_do_machine_check(struct pt_regs *regs)
*/
mcck->kill_task = 1;
mcck->mcck_code = mci.val;
- set_cpu_flag(CIF_MCCK_PENDING);
+ mcck_pending = 1;
}
/*
@@ -420,8 +420,7 @@ void notrace s390_do_machine_check(struct pt_regs *regs)
mcck->stp_queue |= stp_sync_check();
if (S390_lowcore.external_damage_code & (1U << ED_STP_ISLAND))
mcck->stp_queue |= stp_island_check();
- if (mcck->stp_queue)
- set_cpu_flag(CIF_MCCK_PENDING);
+ mcck_pending = 1;
}
/*
@@ -442,12 +441,12 @@ void notrace s390_do_machine_check(struct pt_regs *regs)
if (mci.cp) {
/* Channel report word pending */
mcck->channel_report = 1;
- set_cpu_flag(CIF_MCCK_PENDING);
+ mcck_pending = 1;
}
if (mci.w) {
/* Warning pending */
mcck->warning = 1;
- set_cpu_flag(CIF_MCCK_PENDING);
+ mcck_pending = 1;
}
/*
@@ -462,7 +461,17 @@ void notrace s390_do_machine_check(struct pt_regs *regs)
*((long *)(regs->gprs[15] + __SF_SIE_REASON)) = -EINTR;
}
clear_cpu_flag(CIF_MCCK_GUEST);
+
+ if (user_mode(regs) && mcck_pending) {
+ nmi_exit();
+ return 1;
+ }
+
+ if (mcck_pending)
+ schedule_mcck_handler();
+
nmi_exit();
+ return 0;
}
NOKPROBE_SYMBOL(s390_do_machine_check);
diff --git a/arch/s390/kernel/ptrace.c b/arch/s390/kernel/ptrace.c
index 58faa12542a1..994a8b86edae 100644
--- a/arch/s390/kernel/ptrace.c
+++ b/arch/s390/kernel/ptrace.c
@@ -1416,7 +1416,7 @@ static const struct user_regset s390_regsets[] = {
};
static const struct user_regset_view user_s390_view = {
- .name = UTS_MACHINE,
+ .name = "s390x",
.e_machine = EM_S390,
.regsets = s390_regsets,
.n = ARRAY_SIZE(s390_regsets)
diff --git a/arch/s390/kernel/setup.c b/arch/s390/kernel/setup.c
index 0f0b140b5558..5853c9872dfe 100644
--- a/arch/s390/kernel/setup.c
+++ b/arch/s390/kernel/setup.c
@@ -381,8 +381,7 @@ static void __init setup_lowcore_dat_off(void)
lc->restart_psw.addr = (unsigned long) restart_int_handler;
lc->external_new_psw.mask = PSW_KERNEL_BITS | PSW_MASK_MCHECK;
lc->external_new_psw.addr = (unsigned long) ext_int_handler;
- lc->svc_new_psw.mask = PSW_KERNEL_BITS |
- PSW_MASK_IO | PSW_MASK_EXT | PSW_MASK_MCHECK;
+ lc->svc_new_psw.mask = PSW_KERNEL_BITS | PSW_MASK_MCHECK;
lc->svc_new_psw.addr = (unsigned long) system_call;
lc->program_new_psw.mask = PSW_KERNEL_BITS | PSW_MASK_MCHECK;
lc->program_new_psw.addr = (unsigned long) pgm_check_handler;
@@ -594,9 +593,10 @@ static void __init setup_memory_end(void)
#ifdef CONFIG_CRASH_DUMP
/*
- * When kdump is enabled, we have to ensure that no memory from
- * the area [0 - crashkernel memory size] and
- * [crashk_res.start - crashk_res.end] is set offline.
+ * When kdump is enabled, we have to ensure that no memory from the area
+ * [0 - crashkernel memory size] is set offline - it will be exchanged with
+ * the crashkernel memory region when kdump is triggered. The crashkernel
+ * memory region can never get offlined (pages are unmovable).
*/
static int kdump_mem_notifier(struct notifier_block *nb,
unsigned long action, void *data)
@@ -607,11 +607,7 @@ static int kdump_mem_notifier(struct notifier_block *nb,
return NOTIFY_OK;
if (arg->start_pfn < PFN_DOWN(resource_size(&crashk_res)))
return NOTIFY_BAD;
- if (arg->start_pfn > PFN_DOWN(crashk_res.end))
- return NOTIFY_OK;
- if (arg->start_pfn + arg->nr_pages - 1 < PFN_DOWN(crashk_res.start))
- return NOTIFY_OK;
- return NOTIFY_BAD;
+ return NOTIFY_OK;
}
static struct notifier_block kdump_mem_nb = {
diff --git a/arch/s390/kernel/smp.c b/arch/s390/kernel/smp.c
index 10dbb12eb14d..e6be63ff162a 100644
--- a/arch/s390/kernel/smp.c
+++ b/arch/s390/kernel/smp.c
@@ -61,6 +61,7 @@ enum {
ec_schedule = 0,
ec_call_function_single,
ec_stop_cpu,
+ ec_mcck_pending,
};
enum {
@@ -403,6 +404,11 @@ int smp_find_processor_id(u16 address)
return -1;
}
+void schedule_mcck_handler(void)
+{
+ pcpu_ec_call(pcpu_devices + smp_processor_id(), ec_mcck_pending);
+}
+
bool notrace arch_vcpu_is_preempted(int cpu)
{
if (test_cpu_flag_of(CIF_ENABLED_WAIT, cpu))
@@ -497,6 +503,8 @@ static void smp_handle_ext_call(void)
scheduler_ipi();
if (test_bit(ec_call_function_single, &bits))
generic_smp_call_function_single_interrupt();
+ if (test_bit(ec_mcck_pending, &bits))
+ s390_handle_mcck();
}
static void do_ext_call_interrupt(struct ext_code ext_code,
diff --git a/arch/s390/kvm/kvm-s390.c b/arch/s390/kvm/kvm-s390.c
index 06bde4bad205..22058ea9b8eb 100644
--- a/arch/s390/kvm/kvm-s390.c
+++ b/arch/s390/kvm/kvm-s390.c
@@ -3998,9 +3998,6 @@ static int vcpu_pre_run(struct kvm_vcpu *vcpu)
if (need_resched())
schedule();
- if (test_cpu_flag(CIF_MCCK_PENDING))
- s390_handle_mcck();
-
if (!kvm_is_ucontrol(vcpu->kvm)) {
rc = kvm_s390_deliver_pending_interrupts(vcpu);
if (rc)
diff --git a/arch/s390/kvm/vsie.c b/arch/s390/kvm/vsie.c
index ef05b4e167fb..9e9056cebfcf 100644
--- a/arch/s390/kvm/vsie.c
+++ b/arch/s390/kvm/vsie.c
@@ -1000,9 +1000,6 @@ static int do_vsie_run(struct kvm_vcpu *vcpu, struct vsie_page *vsie_page)
handle_last_fault(vcpu, vsie_page);
- if (test_cpu_flag(CIF_MCCK_PENDING))
- s390_handle_mcck();
-
srcu_read_unlock(&vcpu->kvm->srcu, vcpu->srcu_idx);
/* save current guest state of bp isolation override */
diff --git a/arch/s390/lib/delay.c b/arch/s390/lib/delay.c
index d4aa10795605..daca7bad66de 100644
--- a/arch/s390/lib/delay.c
+++ b/arch/s390/lib/delay.c
@@ -33,7 +33,7 @@ EXPORT_SYMBOL(__delay);
static void __udelay_disabled(unsigned long long usecs)
{
- unsigned long cr0, cr0_new, psw_mask;
+ unsigned long cr0, cr0_new, psw_mask, flags;
struct s390_idle_data idle;
u64 end;
@@ -45,7 +45,9 @@ static void __udelay_disabled(unsigned long long usecs)
psw_mask = __extract_psw() | PSW_MASK_EXT | PSW_MASK_WAIT;
set_clock_comparator(end);
set_cpu_flag(CIF_IGNORE_IRQ);
+ local_irq_save(flags);
psw_idle(&idle, psw_mask);
+ local_irq_restore(flags);
clear_cpu_flag(CIF_IGNORE_IRQ);
set_clock_comparator(S390_lowcore.clock_comparator);
__ctl_load(cr0, 0, 0);
diff --git a/arch/s390/pci/Makefile b/arch/s390/pci/Makefile
index 748626a33028..b4e3c84772a1 100644
--- a/arch/s390/pci/Makefile
+++ b/arch/s390/pci/Makefile
@@ -4,4 +4,5 @@
#
obj-$(CONFIG_PCI) += pci.o pci_irq.o pci_dma.o pci_clp.o pci_sysfs.o \
- pci_event.o pci_debug.o pci_insn.o pci_mmio.o
+ pci_event.o pci_debug.o pci_insn.o pci_mmio.o \
+ pci_bus.o
diff --git a/arch/s390/pci/pci.c b/arch/s390/pci/pci.c
index 94ca121933de..3902c9f6f2d6 100644
--- a/arch/s390/pci/pci.c
+++ b/arch/s390/pci/pci.c
@@ -36,18 +36,21 @@
#include <asm/pci_clp.h>
#include <asm/pci_dma.h>
+#include "pci_bus.h"
+
/* list of all detected zpci devices */
static LIST_HEAD(zpci_list);
static DEFINE_SPINLOCK(zpci_list_lock);
static DECLARE_BITMAP(zpci_domain, ZPCI_DOMAIN_BITMAP_SIZE);
static DEFINE_SPINLOCK(zpci_domain_lock);
-static unsigned int zpci_num_domains_allocated;
#define ZPCI_IOMAP_ENTRIES \
min(((unsigned long) ZPCI_NR_DEVICES * PCI_STD_NUM_BARS / 2), \
ZPCI_IOMAP_MAX_ENTRIES)
+unsigned int s390_pci_no_rid;
+
static DEFINE_SPINLOCK(zpci_iomap_lock);
static unsigned long *zpci_iomap_bitmap;
struct zpci_iomap_entry *zpci_iomap_start;
@@ -88,17 +91,12 @@ void zpci_remove_reserved_devices(void)
spin_unlock(&zpci_list_lock);
list_for_each_entry_safe(zdev, tmp, &remove, entry)
- zpci_remove_device(zdev);
-}
-
-static struct zpci_dev *get_zdev_by_bus(struct pci_bus *bus)
-{
- return (bus && bus->sysdata) ? (struct zpci_dev *) bus->sysdata : NULL;
+ zpci_zdev_put(zdev);
}
int pci_domain_nr(struct pci_bus *bus)
{
- return ((struct zpci_dev *) bus->sysdata)->domain;
+ return ((struct zpci_bus *) bus->sysdata)->domain_nr;
}
EXPORT_SYMBOL_GPL(pci_domain_nr);
@@ -228,28 +226,29 @@ void __iowrite64_copy(void __iomem *to, const void *from, size_t count)
zpci_memcpy_toio(to, from, count);
}
-void __iomem *ioremap(unsigned long ioaddr, unsigned long size)
+void __iomem *ioremap(phys_addr_t addr, size_t size)
{
+ unsigned long offset, vaddr;
struct vm_struct *area;
- unsigned long offset;
+ phys_addr_t last_addr;
- if (!size)
+ last_addr = addr + size - 1;
+ if (!size || last_addr < addr)
return NULL;
if (!static_branch_unlikely(&have_mio))
- return (void __iomem *) ioaddr;
+ return (void __iomem *) addr;
- offset = ioaddr & ~PAGE_MASK;
- ioaddr &= PAGE_MASK;
+ offset = addr & ~PAGE_MASK;
+ addr &= PAGE_MASK;
size = PAGE_ALIGN(size + offset);
area = get_vm_area(size, VM_IOREMAP);
if (!area)
return NULL;
- if (ioremap_page_range((unsigned long) area->addr,
- (unsigned long) area->addr + size,
- ioaddr, PAGE_KERNEL)) {
- vunmap(area->addr);
+ vaddr = (unsigned long) area->addr;
+ if (ioremap_page_range(vaddr, vaddr + size, addr, PAGE_KERNEL)) {
+ free_vm_area(area);
return NULL;
}
return (void __iomem *) ((unsigned long) area->addr + offset);
@@ -373,29 +372,17 @@ EXPORT_SYMBOL(pci_iounmap);
static int pci_read(struct pci_bus *bus, unsigned int devfn, int where,
int size, u32 *val)
{
- struct zpci_dev *zdev = get_zdev_by_bus(bus);
- int ret;
+ struct zpci_dev *zdev = get_zdev_by_bus(bus, devfn);
- if (!zdev || devfn != ZPCI_DEVFN)
- ret = -ENODEV;
- else
- ret = zpci_cfg_load(zdev, where, val, size);
-
- return ret;
+ return (zdev) ? zpci_cfg_load(zdev, where, val, size) : -ENODEV;
}
static int pci_write(struct pci_bus *bus, unsigned int devfn, int where,
int size, u32 val)
{
- struct zpci_dev *zdev = get_zdev_by_bus(bus);
- int ret;
+ struct zpci_dev *zdev = get_zdev_by_bus(bus, devfn);
- if (!zdev || devfn != ZPCI_DEVFN)
- ret = -ENODEV;
- else
- ret = zpci_cfg_store(zdev, where, val, size);
-
- return ret;
+ return (zdev) ? zpci_cfg_store(zdev, where, val, size) : -ENODEV;
}
static struct pci_ops pci_root_ops = {
@@ -506,15 +493,15 @@ static struct resource *__alloc_res(struct zpci_dev *zdev, unsigned long start,
return r;
}
-static int zpci_setup_bus_resources(struct zpci_dev *zdev,
- struct list_head *resources)
+int zpci_setup_bus_resources(struct zpci_dev *zdev,
+ struct list_head *resources)
{
unsigned long addr, size, flags;
struct resource *res;
int i, entry;
snprintf(zdev->res_name, sizeof(zdev->res_name),
- "PCI Bus %04x:%02x", zdev->domain, ZPCI_BUS_NR);
+ "PCI Bus %04x:%02x", zdev->uid, ZPCI_BUS_NR);
for (i = 0; i < PCI_STD_NUM_BARS; i++) {
if (!zdev->bars[i].size)
@@ -608,98 +595,53 @@ void pcibios_disable_device(struct pci_dev *pdev)
zpci_debug_exit_device(zdev);
}
-static int zpci_alloc_domain(struct zpci_dev *zdev)
+static int __zpci_register_domain(int domain)
{
spin_lock(&zpci_domain_lock);
- if (zpci_num_domains_allocated > (ZPCI_NR_DEVICES - 1)) {
+ if (test_bit(domain, zpci_domain)) {
spin_unlock(&zpci_domain_lock);
- pr_err("Adding PCI function %08x failed because the configured limit of %d is reached\n",
- zdev->fid, ZPCI_NR_DEVICES);
- return -ENOSPC;
+ pr_err("Domain %04x is already assigned\n", domain);
+ return -EEXIST;
}
+ set_bit(domain, zpci_domain);
+ spin_unlock(&zpci_domain_lock);
+ return domain;
+}
- if (zpci_unique_uid) {
- zdev->domain = (u16) zdev->uid;
- if (zdev->domain == 0) {
- pr_warn("UID checking is active but no UID is set for PCI function %08x, so automatic domain allocation is used instead\n",
- zdev->fid);
- update_uid_checking(false);
- goto auto_allocate;
- }
+static int __zpci_alloc_domain(void)
+{
+ int domain;
- if (test_bit(zdev->domain, zpci_domain)) {
- spin_unlock(&zpci_domain_lock);
- pr_err("Adding PCI function %08x failed because domain %04x is already assigned\n",
- zdev->fid, zdev->domain);
- return -EEXIST;
- }
- set_bit(zdev->domain, zpci_domain);
- zpci_num_domains_allocated++;
- spin_unlock(&zpci_domain_lock);
- return 0;
- }
-auto_allocate:
+ spin_lock(&zpci_domain_lock);
/*
* We can always auto allocate domains below ZPCI_NR_DEVICES.
* There is either a free domain or we have reached the maximum in
* which case we would have bailed earlier.
*/
- zdev->domain = find_first_zero_bit(zpci_domain, ZPCI_NR_DEVICES);
- set_bit(zdev->domain, zpci_domain);
- zpci_num_domains_allocated++;
+ domain = find_first_zero_bit(zpci_domain, ZPCI_NR_DEVICES);
+ set_bit(domain, zpci_domain);
spin_unlock(&zpci_domain_lock);
- return 0;
+ return domain;
}
-static void zpci_free_domain(struct zpci_dev *zdev)
+int zpci_alloc_domain(int domain)
{
- spin_lock(&zpci_domain_lock);
- clear_bit(zdev->domain, zpci_domain);
- zpci_num_domains_allocated--;
- spin_unlock(&zpci_domain_lock);
+ if (zpci_unique_uid) {
+ if (domain)
+ return __zpci_register_domain(domain);
+ pr_warn("UID checking was active but no UID is provided: switching to automatic domain allocation\n");
+ update_uid_checking(false);
+ }
+ return __zpci_alloc_domain();
}
-void pcibios_remove_bus(struct pci_bus *bus)
+void zpci_free_domain(int domain)
{
- struct zpci_dev *zdev = get_zdev_by_bus(bus);
-
- zpci_exit_slot(zdev);
- zpci_cleanup_bus_resources(zdev);
- zpci_destroy_iommu(zdev);
- zpci_free_domain(zdev);
-
- spin_lock(&zpci_list_lock);
- list_del(&zdev->entry);
- spin_unlock(&zpci_list_lock);
-
- zpci_dbg(3, "rem fid:%x\n", zdev->fid);
- kfree(zdev);
+ spin_lock(&zpci_domain_lock);
+ clear_bit(domain, zpci_domain);
+ spin_unlock(&zpci_domain_lock);
}
-static int zpci_scan_bus(struct zpci_dev *zdev)
-{
- LIST_HEAD(resources);
- int ret;
-
- ret = zpci_setup_bus_resources(zdev, &resources);
- if (ret)
- goto error;
-
- zdev->bus = pci_scan_root_bus(NULL, ZPCI_BUS_NR, &pci_root_ops,
- zdev, &resources);
- if (!zdev->bus) {
- ret = -EIO;
- goto error;
- }
- zdev->bus->max_bus_speed = zdev->max_bus_speed;
- pci_bus_add_devices(zdev->bus);
- return 0;
-
-error:
- zpci_cleanup_bus_resources(zdev);
- pci_free_resource_list(&resources);
- return ret;
-}
int zpci_enable_device(struct zpci_dev *zdev)
{
@@ -734,13 +676,15 @@ int zpci_create_device(struct zpci_dev *zdev)
{
int rc;
- rc = zpci_alloc_domain(zdev);
- if (rc)
- goto out;
+ kref_init(&zdev->kref);
+
+ spin_lock(&zpci_list_lock);
+ list_add_tail(&zdev->entry, &zpci_list);
+ spin_unlock(&zpci_list_lock);
rc = zpci_init_iommu(zdev);
if (rc)
- goto out_free;
+ goto out;
mutex_init(&zdev->lock);
if (zdev->state == ZPCI_FN_STATE_CONFIGURED) {
@@ -748,36 +692,59 @@ int zpci_create_device(struct zpci_dev *zdev)
if (rc)
goto out_destroy_iommu;
}
- rc = zpci_scan_bus(zdev);
+
+ rc = zpci_bus_device_register(zdev, &pci_root_ops);
if (rc)
goto out_disable;
- spin_lock(&zpci_list_lock);
- list_add_tail(&zdev->entry, &zpci_list);
- spin_unlock(&zpci_list_lock);
-
- zpci_init_slot(zdev);
-
return 0;
out_disable:
if (zdev->state == ZPCI_FN_STATE_ONLINE)
zpci_disable_device(zdev);
+
out_destroy_iommu:
zpci_destroy_iommu(zdev);
-out_free:
- zpci_free_domain(zdev);
out:
+ spin_lock(&zpci_list_lock);
+ list_del(&zdev->entry);
+ spin_unlock(&zpci_list_lock);
return rc;
}
-void zpci_remove_device(struct zpci_dev *zdev)
+void zpci_release_device(struct kref *kref)
{
- if (!zdev->bus)
- return;
+ struct zpci_dev *zdev = container_of(kref, struct zpci_dev, kref);
+
+ if (zdev->zbus->bus) {
+ struct pci_dev *pdev;
+
+ pdev = pci_get_slot(zdev->zbus->bus, zdev->devfn);
+ if (pdev)
+ pci_stop_and_remove_bus_device_locked(pdev);
+ }
+
+ switch (zdev->state) {
+ case ZPCI_FN_STATE_ONLINE:
+ case ZPCI_FN_STATE_CONFIGURED:
+ zpci_disable_device(zdev);
+ fallthrough;
+ case ZPCI_FN_STATE_STANDBY:
+ if (zdev->has_hp_slot)
+ zpci_exit_slot(zdev);
+ zpci_cleanup_bus_resources(zdev);
+ zpci_bus_device_unregister(zdev);
+ zpci_destroy_iommu(zdev);
+ fallthrough;
+ default:
+ break;
+ }
- pci_stop_root_bus(zdev->bus);
- pci_remove_root_bus(zdev->bus);
+ spin_lock(&zpci_list_lock);
+ list_del(&zdev->entry);
+ spin_unlock(&zpci_list_lock);
+ zpci_dbg(3, "rem fid:%x\n", zdev->fid);
+ kfree(zdev);
}
int zpci_report_error(struct pci_dev *pdev,
@@ -844,6 +811,10 @@ char * __init pcibios_setup(char *str)
s390_pci_force_floating = 1;
return NULL;
}
+ if (!strcmp(str, "norid")) {
+ s390_pci_no_rid = 1;
+ return NULL;
+ }
return str;
}
diff --git a/arch/s390/pci/pci_bus.c b/arch/s390/pci/pci_bus.c
new file mode 100644
index 000000000000..642a99384688
--- /dev/null
+++ b/arch/s390/pci/pci_bus.c
@@ -0,0 +1,328 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Copyright IBM Corp. 2020
+ *
+ * Author(s):
+ * Pierre Morel <pmorel@linux.ibm.com>
+ *
+ */
+
+#define KMSG_COMPONENT "zpci"
+#define pr_fmt(fmt) KMSG_COMPONENT ": " fmt
+
+#include <linux/kernel.h>
+#include <linux/slab.h>
+#include <linux/err.h>
+#include <linux/export.h>
+#include <linux/delay.h>
+#include <linux/seq_file.h>
+#include <linux/jump_label.h>
+#include <linux/pci.h>
+#include <linux/printk.h>
+
+#include <asm/pci_clp.h>
+#include <asm/pci_dma.h>
+
+#include "pci_bus.h"
+
+static LIST_HEAD(zbus_list);
+static DEFINE_SPINLOCK(zbus_list_lock);
+static int zpci_nb_devices;
+
+/* zpci_bus_scan
+ * @zbus: the zbus holding the zdevices
+ * @ops: the pci operations
+ *
+ * The domain number must be set before pci_scan_root_bus is called.
+ * This function can be called once the domain is known, hence
+ * when the function_0 is dicovered.
+ */
+static int zpci_bus_scan(struct zpci_bus *zbus, int domain, struct pci_ops *ops)
+{
+ struct pci_bus *bus;
+ int rc;
+
+ rc = zpci_alloc_domain(domain);
+ if (rc < 0)
+ return rc;
+ zbus->domain_nr = rc;
+
+ bus = pci_scan_root_bus(NULL, ZPCI_BUS_NR, ops, zbus, &zbus->resources);
+ if (!bus) {
+ zpci_free_domain(zbus->domain_nr);
+ return -EFAULT;
+ }
+
+ zbus->bus = bus;
+ pci_bus_add_devices(bus);
+ return 0;
+}
+
+static void zpci_bus_release(struct kref *kref)
+{
+ struct zpci_bus *zbus = container_of(kref, struct zpci_bus, kref);
+
+ if (zbus->bus) {
+ pci_lock_rescan_remove();
+ pci_stop_root_bus(zbus->bus);
+
+ zpci_free_domain(zbus->domain_nr);
+ pci_free_resource_list(&zbus->resources);
+
+ pci_remove_root_bus(zbus->bus);
+ pci_unlock_rescan_remove();
+ }
+
+ spin_lock(&zbus_list_lock);
+ list_del(&zbus->bus_next);
+ spin_unlock(&zbus_list_lock);
+ kfree(zbus);
+}
+
+static void zpci_bus_put(struct zpci_bus *zbus)
+{
+ kref_put(&zbus->kref, zpci_bus_release);
+}
+
+static struct zpci_bus *zpci_bus_get(int pchid)
+{
+ struct zpci_bus *zbus;
+
+ spin_lock(&zbus_list_lock);
+ list_for_each_entry(zbus, &zbus_list, bus_next) {
+ if (pchid == zbus->pchid) {
+ kref_get(&zbus->kref);
+ goto out_unlock;
+ }
+ }
+ zbus = NULL;
+out_unlock:
+ spin_unlock(&zbus_list_lock);
+ return zbus;
+}
+
+static struct zpci_bus *zpci_bus_alloc(int pchid)
+{
+ struct zpci_bus *zbus;
+
+ zbus = kzalloc(sizeof(*zbus), GFP_KERNEL);
+ if (!zbus)
+ return NULL;
+
+ zbus->pchid = pchid;
+ INIT_LIST_HEAD(&zbus->bus_next);
+ spin_lock(&zbus_list_lock);
+ list_add_tail(&zbus->bus_next, &zbus_list);
+ spin_unlock(&zbus_list_lock);
+
+ kref_init(&zbus->kref);
+ INIT_LIST_HEAD(&zbus->resources);
+
+ zbus->bus_resource.start = 0;
+ zbus->bus_resource.end = ZPCI_BUS_NR;
+ zbus->bus_resource.flags = IORESOURCE_BUS;
+ pci_add_resource(&zbus->resources, &zbus->bus_resource);
+
+ return zbus;
+}
+
+#ifdef CONFIG_PCI_IOV
+static int zpci_bus_link_virtfn(struct pci_dev *pdev,
+ struct pci_dev *virtfn, int vfid)
+{
+ int rc;
+
+ virtfn->physfn = pci_dev_get(pdev);
+ rc = pci_iov_sysfs_link(pdev, virtfn, vfid);
+ if (rc) {
+ pci_dev_put(pdev);
+ virtfn->physfn = NULL;
+ return rc;
+ }
+ return 0;
+}
+
+static int zpci_bus_setup_virtfn(struct zpci_bus *zbus,
+ struct pci_dev *virtfn, int vfn)
+{
+ int i, cand_devfn;
+ struct zpci_dev *zdev;
+ struct pci_dev *pdev;
+ int vfid = vfn - 1; /* Linux' vfid's start at 0 vfn at 1*/
+ int rc = 0;
+
+ virtfn->is_virtfn = 1;
+ virtfn->multifunction = 0;
+ WARN_ON(vfid < 0);
+ /* If the parent PF for the given VF is also configured in the
+ * instance, it must be on the same zbus.
+ * We can then identify the parent PF by checking what
+ * devfn the VF would have if it belonged to that PF using the PF's
+ * stride and offset. Only if this candidate devfn matches the
+ * actual devfn will we link both functions.
+ */
+ for (i = 0; i < ZPCI_FUNCTIONS_PER_BUS; i++) {
+ zdev = zbus->function[i];
+ if (zdev && zdev->is_physfn) {
+ pdev = pci_get_slot(zbus->bus, zdev->devfn);
+ cand_devfn = pci_iov_virtfn_devfn(pdev, vfid);
+ if (cand_devfn == virtfn->devfn) {
+ rc = zpci_bus_link_virtfn(pdev, virtfn, vfid);
+ break;
+ }
+ }
+ }
+ return rc;
+}
+#else
+static inline int zpci_bus_setup_virtfn(struct zpci_bus *zbus,
+ struct pci_dev *virtfn, int vfn)
+{
+ virtfn->is_virtfn = 1;
+ virtfn->multifunction = 0;
+ return 0;
+}
+#endif
+
+static int zpci_bus_add_device(struct zpci_bus *zbus, struct zpci_dev *zdev)
+{
+ struct pci_bus *bus;
+ struct resource_entry *window, *n;
+ struct resource *res;
+ struct pci_dev *pdev;
+ int rc;
+
+ bus = zbus->bus;
+ if (!bus)
+ return -EINVAL;
+
+ pdev = pci_get_slot(bus, zdev->devfn);
+ if (pdev) {
+ /* Device is already known. */
+ pci_dev_put(pdev);
+ return 0;
+ }
+
+ rc = zpci_init_slot(zdev);
+ if (rc)
+ return rc;
+ zdev->has_hp_slot = 1;
+
+ resource_list_for_each_entry_safe(window, n, &zbus->resources) {
+ res = window->res;
+ pci_bus_add_resource(bus, res, 0);
+ }
+
+ pdev = pci_scan_single_device(bus, zdev->devfn);
+ if (pdev) {
+ if (!zdev->is_physfn) {
+ rc = zpci_bus_setup_virtfn(zbus, pdev, zdev->vfn);
+ if (rc)
+ goto failed_with_pdev;
+ }
+ pci_bus_add_device(pdev);
+ }
+ return 0;
+
+failed_with_pdev:
+ pci_stop_and_remove_bus_device(pdev);
+ pci_dev_put(pdev);
+ return rc;
+}
+
+static void zpci_bus_add_devices(struct zpci_bus *zbus)
+{
+ int i;
+
+ for (i = 1; i < ZPCI_FUNCTIONS_PER_BUS; i++)
+ if (zbus->function[i])
+ zpci_bus_add_device(zbus, zbus->function[i]);
+
+ pci_lock_rescan_remove();
+ pci_bus_add_devices(zbus->bus);
+ pci_unlock_rescan_remove();
+}
+
+int zpci_bus_device_register(struct zpci_dev *zdev, struct pci_ops *ops)
+{
+ struct zpci_bus *zbus = NULL;
+ int rc = -EBADF;
+
+ if (zpci_nb_devices == ZPCI_NR_DEVICES) {
+ pr_warn("Adding PCI function %08x failed because the configured limit of %d is reached\n",
+ zdev->fid, ZPCI_NR_DEVICES);
+ return -ENOSPC;
+ }
+ zpci_nb_devices++;
+
+ if (zdev->devfn >= ZPCI_FUNCTIONS_PER_BUS)
+ return -EINVAL;
+
+ if (!s390_pci_no_rid && zdev->rid_available)
+ zbus = zpci_bus_get(zdev->pchid);
+
+ if (!zbus) {
+ zbus = zpci_bus_alloc(zdev->pchid);
+ if (!zbus)
+ return -ENOMEM;
+ }
+
+ zdev->zbus = zbus;
+ if (zbus->function[zdev->devfn]) {
+ pr_err("devfn %04x is already assigned\n", zdev->devfn);
+ goto error; /* rc already set */
+ }
+ zbus->function[zdev->devfn] = zdev;
+
+ zpci_setup_bus_resources(zdev, &zbus->resources);
+
+ if (zbus->bus) {
+ if (!zbus->multifunction) {
+ WARN_ONCE(1, "zbus is not multifunction\n");
+ goto error_bus;
+ }
+ if (!zdev->rid_available) {
+ WARN_ONCE(1, "rid_available not set for multifunction\n");
+ goto error_bus;
+ }
+ rc = zpci_bus_add_device(zbus, zdev);
+ if (rc)
+ goto error_bus;
+ } else if (zdev->devfn == 0) {
+ if (zbus->multifunction && !zdev->rid_available) {
+ WARN_ONCE(1, "rid_available not set on function 0 for multifunction\n");
+ goto error_bus;
+ }
+ rc = zpci_bus_scan(zbus, (u16)zdev->uid, ops);
+ if (rc)
+ goto error_bus;
+ zpci_bus_add_devices(zbus);
+ rc = zpci_init_slot(zdev);
+ if (rc)
+ goto error_bus;
+ zdev->has_hp_slot = 1;
+ zbus->multifunction = zdev->rid_available;
+ zbus->max_bus_speed = zdev->max_bus_speed;
+ } else {
+ zbus->multifunction = 1;
+ }
+
+ return 0;
+
+error_bus:
+ zpci_nb_devices--;
+ zbus->function[zdev->devfn] = NULL;
+error:
+ pr_err("Adding PCI function %08x failed\n", zdev->fid);
+ zpci_bus_put(zbus);
+ return rc;
+}
+
+void zpci_bus_device_unregister(struct zpci_dev *zdev)
+{
+ struct zpci_bus *zbus = zdev->zbus;
+
+ zpci_nb_devices--;
+ zbus->function[zdev->devfn] = NULL;
+ zpci_bus_put(zbus);
+}
diff --git a/arch/s390/pci/pci_bus.h b/arch/s390/pci/pci_bus.h
new file mode 100644
index 000000000000..89be3c354b7b
--- /dev/null
+++ b/arch/s390/pci/pci_bus.h
@@ -0,0 +1,31 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+/*
+ * Copyright IBM Corp. 2020
+ *
+ * Author(s):
+ * Pierre Morel <pmorel@linux.ibm.com>
+ *
+ */
+
+int zpci_bus_device_register(struct zpci_dev *zdev, struct pci_ops *ops);
+void zpci_bus_device_unregister(struct zpci_dev *zdev);
+int zpci_bus_init(void);
+
+void zpci_release_device(struct kref *kref);
+static inline void zpci_zdev_put(struct zpci_dev *zdev)
+{
+ kref_put(&zdev->kref, zpci_release_device);
+}
+
+int zpci_alloc_domain(int domain);
+void zpci_free_domain(int domain);
+int zpci_setup_bus_resources(struct zpci_dev *zdev,
+ struct list_head *resources);
+
+static inline struct zpci_dev *get_zdev_by_bus(struct pci_bus *bus,
+ unsigned int devfn)
+{
+ struct zpci_bus *zbus = bus->sysdata;
+
+ return (devfn >= ZPCI_FUNCTIONS_PER_BUS) ? NULL : zbus->function[devfn];
+}
diff --git a/arch/s390/pci/pci_clp.c b/arch/s390/pci/pci_clp.c
index ea794ae755ae..7e735f41a0a6 100644
--- a/arch/s390/pci/pci_clp.c
+++ b/arch/s390/pci/pci_clp.c
@@ -155,8 +155,13 @@ static int clp_store_query_pci_fn(struct zpci_dev *zdev,
zdev->pfgid = response->pfgid;
zdev->pft = response->pft;
zdev->vfn = response->vfn;
+ zdev->port = response->port;
zdev->uid = response->uid;
zdev->fmb_length = sizeof(u32) * response->fmb_len;
+ zdev->rid_available = response->rid_avail;
+ zdev->is_physfn = response->is_physfn;
+ if (!s390_pci_no_rid && zdev->rid_available)
+ zdev->devfn = response->rid & ZPCI_RID_MASK_DEVFN;
memcpy(zdev->pfip, response->pfip, sizeof(zdev->pfip));
if (response->util_str_avail) {
@@ -309,14 +314,13 @@ out:
int clp_disable_fh(struct zpci_dev *zdev)
{
- u32 fh = zdev->fh;
int rc;
if (!zdev_enabled(zdev))
return 0;
rc = clp_set_pci_fn(zdev, 0, CLP_SET_DISABLE_PCI_FN);
- zpci_dbg(3, "dis fid:%x, fh:%x, rc:%d\n", zdev->fid, fh, rc);
+ zpci_dbg(3, "dis fid:%x, fh:%x, rc:%d\n", zdev->fid, zdev->fh, rc);
return rc;
}
diff --git a/arch/s390/pci/pci_event.c b/arch/s390/pci/pci_event.c
index 8d6ee4af4230..08e1d619398e 100644
--- a/arch/s390/pci/pci_event.c
+++ b/arch/s390/pci/pci_event.c
@@ -14,6 +14,8 @@
#include <asm/pci_debug.h>
#include <asm/sclp.h>
+#include "pci_bus.h"
+
/* Content Code Description for PCI Function Error */
struct zpci_ccdf_err {
u32 reserved1;
@@ -53,7 +55,7 @@ static void __zpci_event_error(struct zpci_ccdf_err *ccdf)
zpci_err_hex(ccdf, sizeof(*ccdf));
if (zdev)
- pdev = pci_get_slot(zdev->bus, ZPCI_DEVFN);
+ pdev = pci_get_slot(zdev->zbus->bus, zdev->devfn);
pr_err("%s: Event 0x%x reports an error for PCI function 0x%x\n",
pdev ? pci_name(pdev) : "n/a", ccdf->pec, ccdf->fid);
@@ -78,36 +80,28 @@ static void __zpci_event_availability(struct zpci_ccdf_avail *ccdf)
enum zpci_state state;
int ret;
- if (zdev)
- pdev = pci_get_slot(zdev->bus, ZPCI_DEVFN);
+ if (zdev && zdev->zbus && zdev->zbus->bus)
+ pdev = pci_get_slot(zdev->zbus->bus, zdev->devfn);
- pr_info("%s: Event 0x%x reconfigured PCI function 0x%x\n",
- pdev ? pci_name(pdev) : "n/a", ccdf->pec, ccdf->fid);
zpci_err("avail CCDF:\n");
zpci_err_hex(ccdf, sizeof(*ccdf));
switch (ccdf->pec) {
case 0x0301: /* Reserved|Standby -> Configured */
if (!zdev) {
- ret = clp_add_pci_device(ccdf->fid, ccdf->fh, 0);
- if (ret)
- break;
- zdev = get_zdev_by_fid(ccdf->fid);
- }
- if (!zdev || zdev->state != ZPCI_FN_STATE_STANDBY)
+ ret = clp_add_pci_device(ccdf->fid, ccdf->fh, 1);
break;
- zdev->state = ZPCI_FN_STATE_CONFIGURED;
+ }
zdev->fh = ccdf->fh;
- ret = zpci_enable_device(zdev);
- if (ret)
- break;
- pci_lock_rescan_remove();
- pci_rescan_bus(zdev->bus);
- pci_unlock_rescan_remove();
+ zdev->state = ZPCI_FN_STATE_CONFIGURED;
+ zpci_create_device(zdev);
break;
case 0x0302: /* Reserved -> Standby */
- if (!zdev)
+ if (!zdev) {
clp_add_pci_device(ccdf->fid, ccdf->fh, 0);
+ break;
+ }
+ zdev->fh = ccdf->fh;
break;
case 0x0303: /* Deconfiguration requested */
if (!zdev)
@@ -135,12 +129,10 @@ static void __zpci_event_availability(struct zpci_ccdf_avail *ccdf)
pci_stop_and_remove_bus_device_locked(pdev);
}
- zdev->fh = ccdf->fh;
- zpci_disable_device(zdev);
zdev->state = ZPCI_FN_STATE_STANDBY;
if (!clp_get_state(ccdf->fid, &state) &&
state == ZPCI_FN_STATE_RESERVED) {
- zpci_remove_device(zdev);
+ zpci_zdev_put(zdev);
}
break;
case 0x0306: /* 0x308 or 0x302 for multiple devices */
@@ -149,12 +141,11 @@ static void __zpci_event_availability(struct zpci_ccdf_avail *ccdf)
case 0x0308: /* Standby -> Reserved */
if (!zdev)
break;
- zpci_remove_device(zdev);
+ zpci_zdev_put(zdev);
break;
default:
break;
}
- pci_dev_put(pdev);
}
void zpci_event_availability(void *data)
diff --git a/arch/s390/pci/pci_sysfs.c b/arch/s390/pci/pci_sysfs.c
index 215f17437a4f..5c028bee91b9 100644
--- a/arch/s390/pci/pci_sysfs.c
+++ b/arch/s390/pci/pci_sysfs.c
@@ -33,6 +33,7 @@ zpci_attr(pchid, "0x%04x\n", pchid);
zpci_attr(pfgid, "0x%02x\n", pfgid);
zpci_attr(vfn, "0x%04x\n", vfn);
zpci_attr(pft, "0x%02x\n", pft);
+zpci_attr(port, "%d\n", port);
zpci_attr(uid, "0x%x\n", uid);
zpci_attr(segment0, "0x%02x\n", pfip[0]);
zpci_attr(segment1, "0x%02x\n", pfip[1]);
@@ -88,7 +89,7 @@ static ssize_t recover_store(struct device *dev, struct device_attribute *attr,
ret = zpci_enable_device(zdev);
if (ret)
goto out;
- pci_rescan_bus(zdev->bus);
+ pci_rescan_bus(zdev->zbus->bus);
}
out:
pci_unlock_rescan_remove();
@@ -142,6 +143,7 @@ static struct attribute *zpci_dev_attrs[] = {
&dev_attr_pchid.attr,
&dev_attr_pfgid.attr,
&dev_attr_pft.attr,
+ &dev_attr_port.attr,
&dev_attr_vfn.attr,
&dev_attr_uid.attr,
&dev_attr_recover.attr,