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authorLinus Torvalds <torvalds@linux-foundation.org>2016-10-07 20:19:31 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2016-10-07 20:19:31 -0700
commit07021b43597f506cc525d139ed1a94e79cf184f2 (patch)
tree888ab33ec69b397ae6f8a2c82d14197047ee827e /drivers/misc
parentd1f5323370fceaed43a7ee38f4c7bfc7e70f28d0 (diff)
parentb7b7013cac55d794940bd9cb7b7c55c9dececac4 (diff)
downloadlinux-07021b43597f506cc525d139ed1a94e79cf184f2.tar.bz2
Merge tag 'powerpc-4.9-1' of git://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux
Pull powerpc updates from Michael Ellerman: "Highlights: - Major rework of Book3S 64-bit exception vectors (Nicholas Piggin) - Use gas sections for arranging exception vectors et. al. - Large set of TM cleanups and selftests (Cyril Bur) - Enable transactional memory (TM) lazily for userspace (Cyril Bur) - Support for XZ compression in the zImage wrapper (Oliver O'Halloran) - Add support for bpf constant blinding (Naveen N. Rao) - Beginnings of upstream support for PA Semi Nemo motherboards (Darren Stevens) Fixes: - Ensure .mem(init|exit).text are within _stext/_etext (Michael Ellerman) - xmon: Don't use ld on 32-bit (Michael Ellerman) - vdso64: Use double word compare on pointers (Anton Blanchard) - powerpc/nvram: Fix an incorrect partition merge (Pan Xinhui) - powerpc: Fix usage of _PAGE_RO in hugepage (Christophe Leroy) - powerpc/mm: Update FORCE_MAX_ZONEORDER range to allow hugetlb w/4K (Aneesh Kumar K.V) - Fix memory leak in queue_hotplug_event() error path (Andrew Donnellan) - Replay hypervisor maintenance interrupt first (Nicholas Piggin) Various performance optimisations (Anton Blanchard): - Align hot loops of memset() and backwards_memcpy() - During context switch, check before setting mm_cpumask - Remove static branch prediction in atomic{, 64}_add_unless - Only disable HAVE_EFFICIENT_UNALIGNED_ACCESS on POWER7 little endian - Set default CPU type to POWER8 for little endian builds Cleanups & features: - Sparse fixes/cleanups (Daniel Axtens) - Preserve CFAR value on SLB miss caused by access to bogus address (Paul Mackerras) - Radix MMU fixups for POWER9 (Aneesh Kumar K.V) - Support for setting used_(vsr|vr|spe) in sigreturn path (for CRIU) (Simon Guo) - Optimise syscall entry for virtual, relocatable case (Nicholas Piggin) - Optimise MSR handling in exception handling (Nicholas Piggin) - Support for kexec with Radix MMU (Benjamin Herrenschmidt) - powernv EEH fixes (Russell Currey) - Suprise PCI hotplug support for powernv (Gavin Shan) - Endian/sparse fixes for powernv PCI (Gavin Shan) - Defconfig updates (Anton Blanchard) - KVM: PPC: Book3S HV: Migrate pinned pages out of CMA (Balbir Singh) - cxl: Flush PSL cache before resetting the adapter (Frederic Barrat) - cxl: replace loop with for_each_child_of_node(), remove unneeded of_node_put() (Andrew Donnellan) - Fix HV facility unavailable to use correct handler (Nicholas Piggin) - Remove unnecessary syscall trampoline (Nicholas Piggin) - fadump: Fix build break when CONFIG_PROC_VMCORE=n (Michael Ellerman) - Quieten EEH message when no adapters are found (Anton Blanchard) - powernv: Add PHB register dump debugfs handle (Russell Currey) - Use kprobe blacklist for exception handlers & asm functions (Nicholas Piggin) - Document the syscall ABI (Nicholas Piggin) - MAINTAINERS: Update cxl maintainers (Michael Neuling) - powerpc: Remove all usages of NO_IRQ (Michael Ellerman) Minor cleanups: - Andrew Donnellan, Christophe Leroy, Colin Ian King, Cyril Bur, Frederic Barrat, Pan Xinhui, PrasannaKumar Muralidharan, Rui Teng, Simon Guo" * tag 'powerpc-4.9-1' of git://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux: (156 commits) powerpc/bpf: Add support for bpf constant blinding powerpc/bpf: Implement support for tail calls powerpc/bpf: Introduce accessors for using the tmp local stack space powerpc/fadump: Fix build break when CONFIG_PROC_VMCORE=n powerpc: tm: Enable transactional memory (TM) lazily for userspace powerpc/tm: Add TM Unavailable Exception powerpc: Remove do_load_up_transact_{fpu,altivec} powerpc: tm: Rename transct_(*) to ck(\1)_state powerpc: tm: Always use fp_state and vr_state to store live registers selftests/powerpc: Add checks for transactional VSXs in signal contexts selftests/powerpc: Add checks for transactional VMXs in signal contexts selftests/powerpc: Add checks for transactional FPUs in signal contexts selftests/powerpc: Add checks for transactional GPRs in signal contexts selftests/powerpc: Check that signals always get delivered selftests/powerpc: Add TM tcheck helpers in C selftests/powerpc: Allow tests to extend their kill timeout selftests/powerpc: Introduce GPR asm helper header file selftests/powerpc: Move VMX stack frame macros to header file selftests/powerpc: Rework FPU stack placement macros and move to header file selftests/powerpc: Check for VSX preservation across userspace preemption ...
Diffstat (limited to 'drivers/misc')
-rw-r--r--drivers/misc/cxl/cxl.h6
-rw-r--r--drivers/misc/cxl/native.c31
-rw-r--r--drivers/misc/cxl/of.c8
-rw-r--r--drivers/misc/cxl/pci.c7
4 files changed, 44 insertions, 8 deletions
diff --git a/drivers/misc/cxl/cxl.h b/drivers/misc/cxl/cxl.h
index 344a0ff8f8c7..01d372aba131 100644
--- a/drivers/misc/cxl/cxl.h
+++ b/drivers/misc/cxl/cxl.h
@@ -162,7 +162,10 @@ static const cxl_p2n_reg_t CXL_PSL_WED_An = {0x0A0};
#define CXL_PSL_SPAP_V 0x0000000000000001ULL
/****** CXL_PSL_Control ****************************************************/
-#define CXL_PSL_Control_tb 0x0000000000000001ULL
+#define CXL_PSL_Control_tb (0x1ull << (63-63))
+#define CXL_PSL_Control_Fr (0x1ull << (63-31))
+#define CXL_PSL_Control_Fs_MASK (0x3ull << (63-29))
+#define CXL_PSL_Control_Fs_Complete (0x3ull << (63-29))
/****** CXL_PSL_DLCNTL *****************************************************/
#define CXL_PSL_DLCNTL_D (0x1ull << (63-28))
@@ -854,6 +857,7 @@ int cxl_register_one_irq(struct cxl *adapter, irq_handler_t handler,
int cxl_check_error(struct cxl_afu *afu);
int cxl_afu_slbia(struct cxl_afu *afu);
int cxl_tlb_slb_invalidate(struct cxl *adapter);
+int cxl_data_cache_flush(struct cxl *adapter);
int cxl_afu_disable(struct cxl_afu *afu);
int cxl_psl_purge(struct cxl_afu *afu);
diff --git a/drivers/misc/cxl/native.c b/drivers/misc/cxl/native.c
index e606fdc4bc9c..a217a74ccc98 100644
--- a/drivers/misc/cxl/native.c
+++ b/drivers/misc/cxl/native.c
@@ -290,6 +290,37 @@ int cxl_tlb_slb_invalidate(struct cxl *adapter)
return 0;
}
+int cxl_data_cache_flush(struct cxl *adapter)
+{
+ u64 reg;
+ unsigned long timeout = jiffies + (HZ * CXL_TIMEOUT);
+
+ pr_devel("Flushing data cache\n");
+
+ reg = cxl_p1_read(adapter, CXL_PSL_Control);
+ reg |= CXL_PSL_Control_Fr;
+ cxl_p1_write(adapter, CXL_PSL_Control, reg);
+
+ reg = cxl_p1_read(adapter, CXL_PSL_Control);
+ while ((reg & CXL_PSL_Control_Fs_MASK) != CXL_PSL_Control_Fs_Complete) {
+ if (time_after_eq(jiffies, timeout)) {
+ dev_warn(&adapter->dev, "WARNING: cache flush timed out!\n");
+ return -EBUSY;
+ }
+
+ if (!cxl_ops->link_ok(adapter, NULL)) {
+ dev_warn(&adapter->dev, "WARNING: link down when flushing cache\n");
+ return -EIO;
+ }
+ cpu_relax();
+ reg = cxl_p1_read(adapter, CXL_PSL_Control);
+ }
+
+ reg &= ~CXL_PSL_Control_Fr;
+ cxl_p1_write(adapter, CXL_PSL_Control, reg);
+ return 0;
+}
+
static int cxl_write_sstp(struct cxl_afu *afu, u64 sstp0, u64 sstp1)
{
int rc;
diff --git a/drivers/misc/cxl/of.c b/drivers/misc/cxl/of.c
index edc458395f68..ec175ea5dfba 100644
--- a/drivers/misc/cxl/of.c
+++ b/drivers/misc/cxl/of.c
@@ -460,7 +460,7 @@ int cxl_of_probe(struct platform_device *pdev)
struct device_node *afu_np = NULL;
struct cxl *adapter = NULL;
int ret;
- int slice, slice_ok;
+ int slice = 0, slice_ok = 0;
pr_devel("in %s\n", __func__);
@@ -476,13 +476,13 @@ int cxl_of_probe(struct platform_device *pdev)
}
/* init afu */
- slice_ok = 0;
- for (afu_np = NULL, slice = 0; (afu_np = of_get_next_child(np, afu_np)); slice++) {
+ for_each_child_of_node(np, afu_np) {
if ((ret = cxl_guest_init_afu(adapter, slice, afu_np)))
dev_err(&pdev->dev, "AFU %i failed to initialise: %i\n",
slice, ret);
else
slice_ok++;
+ slice++;
}
if (slice_ok == 0) {
@@ -490,8 +490,6 @@ int cxl_of_probe(struct platform_device *pdev)
adapter->slices = 0;
}
- if (afu_np)
- of_node_put(afu_np);
return 0;
}
diff --git a/drivers/misc/cxl/pci.c b/drivers/misc/cxl/pci.c
index 6f0c4ac4b649..7afad8477ad5 100644
--- a/drivers/misc/cxl/pci.c
+++ b/drivers/misc/cxl/pci.c
@@ -1239,6 +1239,9 @@ int cxl_pci_reset(struct cxl *adapter)
dev_info(&dev->dev, "CXL reset\n");
+ /* the adapter is about to be reset, so ignore errors */
+ cxl_data_cache_flush(adapter);
+
/* pcie_warm_reset requests a fundamental pci reset which includes a
* PERST assert/deassert. PERST triggers a loading of the image
* if "user" or "factory" is selected in sysfs */
@@ -1530,11 +1533,11 @@ static void set_sl_ops(struct cxl *adapter, struct pci_dev *dev)
{
if (dev->vendor == PCI_VENDOR_ID_MELLANOX && dev->device == 0x1013) {
/* Mellanox CX-4 */
- dev_info(&adapter->dev, "Device uses an XSL\n");
+ dev_info(&dev->dev, "Device uses an XSL\n");
adapter->native->sl_ops = &xsl_ops;
adapter->min_pe = 1; /* Workaround for CX-4 hardware bug */
} else {
- dev_info(&adapter->dev, "Device uses a PSL\n");
+ dev_info(&dev->dev, "Device uses a PSL\n");
adapter->native->sl_ops = &psl_ops;
}
}