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-rw-r--r--drivers/acpi/Kconfig10
-rw-r--r--drivers/acpi/Makefile3
-rw-r--r--drivers/acpi/acpi_processor.c7
-rw-r--r--drivers/acpi/bus.c3
-rw-r--r--drivers/acpi/gsi.c105
-rw-r--r--drivers/acpi/internal.h4
-rw-r--r--drivers/acpi/osl.c6
-rw-r--r--drivers/acpi/processor_core.c60
-rw-r--r--drivers/acpi/tables.c52
-rw-r--r--drivers/clocksource/arm_arch_timer.c132
-rw-r--r--drivers/irqchip/irq-gic.c104
-rw-r--r--drivers/irqchip/irqchip.c3
-rw-r--r--drivers/xen/Kconfig4
-rw-r--r--drivers/xen/Makefile2
14 files changed, 430 insertions, 65 deletions
diff --git a/drivers/acpi/Kconfig b/drivers/acpi/Kconfig
index e6c3ddd92665..ab2cbb51c6aa 100644
--- a/drivers/acpi/Kconfig
+++ b/drivers/acpi/Kconfig
@@ -5,7 +5,7 @@
menuconfig ACPI
bool "ACPI (Advanced Configuration and Power Interface) Support"
depends on !IA64_HP_SIM
- depends on IA64 || X86
+ depends on IA64 || X86 || (ARM64 && EXPERT)
depends on PCI
select PNP
default y
@@ -48,9 +48,16 @@ config ACPI_LEGACY_TABLES_LOOKUP
config ARCH_MIGHT_HAVE_ACPI_PDC
bool
+config ACPI_GENERIC_GSI
+ bool
+
+config ACPI_SYSTEM_POWER_STATES_SUPPORT
+ bool
+
config ACPI_SLEEP
bool
depends on SUSPEND || HIBERNATION
+ depends on ACPI_SYSTEM_POWER_STATES_SUPPORT
default y
config ACPI_PROCFS_POWER
@@ -163,6 +170,7 @@ config ACPI_PROCESSOR
tristate "Processor"
select THERMAL
select CPU_IDLE
+ depends on X86 || IA64
default y
help
This driver installs ACPI as the idle handler for Linux and uses
diff --git a/drivers/acpi/Makefile b/drivers/acpi/Makefile
index 623b117ad1a2..8a063e276530 100644
--- a/drivers/acpi/Makefile
+++ b/drivers/acpi/Makefile
@@ -23,7 +23,7 @@ acpi-y += nvs.o
# Power management related files
acpi-y += wakeup.o
-acpi-y += sleep.o
+acpi-$(CONFIG_ACPI_SYSTEM_POWER_STATES_SUPPORT) += sleep.o
acpi-y += device_pm.o
acpi-$(CONFIG_ACPI_SLEEP) += proc.o
@@ -56,6 +56,7 @@ ifdef CONFIG_ACPI_VIDEO
acpi-y += video_detect.o
endif
acpi-y += acpi_lpat.o
+acpi-$(CONFIG_ACPI_GENERIC_GSI) += gsi.o
# These are (potentially) separate modules
diff --git a/drivers/acpi/acpi_processor.c b/drivers/acpi/acpi_processor.c
index 1020b1b53a17..58f335ca2e75 100644
--- a/drivers/acpi/acpi_processor.c
+++ b/drivers/acpi/acpi_processor.c
@@ -170,7 +170,7 @@ static int acpi_processor_hotadd_init(struct acpi_processor *pr)
acpi_status status;
int ret;
- if (pr->phys_id == -1)
+ if (pr->phys_id == PHYS_CPUID_INVALID)
return -ENODEV;
status = acpi_evaluate_integer(pr->handle, "_STA", NULL, &sta);
@@ -215,7 +215,8 @@ static int acpi_processor_get_info(struct acpi_device *device)
union acpi_object object = { 0 };
struct acpi_buffer buffer = { sizeof(union acpi_object), &object };
struct acpi_processor *pr = acpi_driver_data(device);
- int phys_id, cpu_index, device_declaration = 0;
+ phys_cpuid_t phys_id;
+ int cpu_index, device_declaration = 0;
acpi_status status = AE_OK;
static int cpu0_initialized;
unsigned long long value;
@@ -263,7 +264,7 @@ static int acpi_processor_get_info(struct acpi_device *device)
}
phys_id = acpi_get_phys_id(pr->handle, device_declaration, pr->acpi_id);
- if (phys_id < 0)
+ if (phys_id == PHYS_CPUID_INVALID)
acpi_handle_debug(pr->handle, "failed to get CPU physical ID.\n");
pr->phys_id = phys_id;
diff --git a/drivers/acpi/bus.c b/drivers/acpi/bus.c
index 8b67bd0f6bb5..c412fdb28d34 100644
--- a/drivers/acpi/bus.c
+++ b/drivers/acpi/bus.c
@@ -448,6 +448,9 @@ static int __init acpi_bus_init_irq(void)
case ACPI_IRQ_MODEL_IOSAPIC:
message = "IOSAPIC";
break;
+ case ACPI_IRQ_MODEL_GIC:
+ message = "GIC";
+ break;
case ACPI_IRQ_MODEL_PLATFORM:
message = "platform specific model";
break;
diff --git a/drivers/acpi/gsi.c b/drivers/acpi/gsi.c
new file mode 100644
index 000000000000..38208f2d0e69
--- /dev/null
+++ b/drivers/acpi/gsi.c
@@ -0,0 +1,105 @@
+/*
+ * ACPI GSI IRQ layer
+ *
+ * Copyright (C) 2015 ARM Ltd.
+ * Author: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+#include <linux/acpi.h>
+#include <linux/irq.h>
+#include <linux/irqdomain.h>
+
+enum acpi_irq_model_id acpi_irq_model;
+
+static unsigned int acpi_gsi_get_irq_type(int trigger, int polarity)
+{
+ switch (polarity) {
+ case ACPI_ACTIVE_LOW:
+ return trigger == ACPI_EDGE_SENSITIVE ?
+ IRQ_TYPE_EDGE_FALLING :
+ IRQ_TYPE_LEVEL_LOW;
+ case ACPI_ACTIVE_HIGH:
+ return trigger == ACPI_EDGE_SENSITIVE ?
+ IRQ_TYPE_EDGE_RISING :
+ IRQ_TYPE_LEVEL_HIGH;
+ case ACPI_ACTIVE_BOTH:
+ if (trigger == ACPI_EDGE_SENSITIVE)
+ return IRQ_TYPE_EDGE_BOTH;
+ default:
+ return IRQ_TYPE_NONE;
+ }
+}
+
+/**
+ * acpi_gsi_to_irq() - Retrieve the linux irq number for a given GSI
+ * @gsi: GSI IRQ number to map
+ * @irq: pointer where linux IRQ number is stored
+ *
+ * irq location updated with irq value [>0 on success, 0 on failure]
+ *
+ * Returns: linux IRQ number on success (>0)
+ * -EINVAL on failure
+ */
+int acpi_gsi_to_irq(u32 gsi, unsigned int *irq)
+{
+ /*
+ * Only default domain is supported at present, always find
+ * the mapping corresponding to default domain by passing NULL
+ * as irq_domain parameter
+ */
+ *irq = irq_find_mapping(NULL, gsi);
+ /*
+ * *irq == 0 means no mapping, that should
+ * be reported as a failure
+ */
+ return (*irq > 0) ? *irq : -EINVAL;
+}
+EXPORT_SYMBOL_GPL(acpi_gsi_to_irq);
+
+/**
+ * acpi_register_gsi() - Map a GSI to a linux IRQ number
+ * @dev: device for which IRQ has to be mapped
+ * @gsi: GSI IRQ number
+ * @trigger: trigger type of the GSI number to be mapped
+ * @polarity: polarity of the GSI to be mapped
+ *
+ * Returns: a valid linux IRQ number on success
+ * -EINVAL on failure
+ */
+int acpi_register_gsi(struct device *dev, u32 gsi, int trigger,
+ int polarity)
+{
+ unsigned int irq;
+ unsigned int irq_type = acpi_gsi_get_irq_type(trigger, polarity);
+
+ /*
+ * There is no way at present to look-up the IRQ domain on ACPI,
+ * hence always create mapping referring to the default domain
+ * by passing NULL as irq_domain parameter
+ */
+ irq = irq_create_mapping(NULL, gsi);
+ if (!irq)
+ return -EINVAL;
+
+ /* Set irq type if specified and different than the current one */
+ if (irq_type != IRQ_TYPE_NONE &&
+ irq_type != irq_get_trigger_type(irq))
+ irq_set_irq_type(irq, irq_type);
+ return irq;
+}
+EXPORT_SYMBOL_GPL(acpi_register_gsi);
+
+/**
+ * acpi_unregister_gsi() - Free a GSI<->linux IRQ number mapping
+ * @gsi: GSI IRQ number
+ */
+void acpi_unregister_gsi(u32 gsi)
+{
+ int irq = irq_find_mapping(NULL, gsi);
+
+ irq_dispose_mapping(irq);
+}
+EXPORT_SYMBOL_GPL(acpi_unregister_gsi);
diff --git a/drivers/acpi/internal.h b/drivers/acpi/internal.h
index 56b321aa2b1c..ba4a61e964be 100644
--- a/drivers/acpi/internal.h
+++ b/drivers/acpi/internal.h
@@ -161,7 +161,11 @@ void acpi_ec_remove_query_handler(struct acpi_ec *ec, u8 query_bit);
/*--------------------------------------------------------------------------
Suspend/Resume
-------------------------------------------------------------------------- */
+#ifdef CONFIG_ACPI_SYSTEM_POWER_STATES_SUPPORT
extern int acpi_sleep_init(void);
+#else
+static inline int acpi_sleep_init(void) { return -ENXIO; }
+#endif
#ifdef CONFIG_ACPI_SLEEP
int acpi_sleep_proc_init(void);
diff --git a/drivers/acpi/osl.c b/drivers/acpi/osl.c
index f9eeae871593..39748bb3a543 100644
--- a/drivers/acpi/osl.c
+++ b/drivers/acpi/osl.c
@@ -336,11 +336,11 @@ acpi_map_lookup_virt(void __iomem *virt, acpi_size size)
return NULL;
}
-#ifndef CONFIG_IA64
-#define should_use_kmap(pfn) page_is_ram(pfn)
-#else
+#if defined(CONFIG_IA64) || defined(CONFIG_ARM64)
/* ioremap will take care of cache attributes */
#define should_use_kmap(pfn) 0
+#else
+#define should_use_kmap(pfn) page_is_ram(pfn)
#endif
static void __iomem *acpi_map(acpi_physical_address pg_off, unsigned long pg_sz)
diff --git a/drivers/acpi/processor_core.c b/drivers/acpi/processor_core.c
index 7962651cdbd4..b1ec78b8a645 100644
--- a/drivers/acpi/processor_core.c
+++ b/drivers/acpi/processor_core.c
@@ -32,7 +32,7 @@ static struct acpi_table_madt *get_madt_table(void)
}
static int map_lapic_id(struct acpi_subtable_header *entry,
- u32 acpi_id, int *apic_id)
+ u32 acpi_id, phys_cpuid_t *apic_id)
{
struct acpi_madt_local_apic *lapic =
container_of(entry, struct acpi_madt_local_apic, header);
@@ -48,7 +48,7 @@ static int map_lapic_id(struct acpi_subtable_header *entry,
}
static int map_x2apic_id(struct acpi_subtable_header *entry,
- int device_declaration, u32 acpi_id, int *apic_id)
+ int device_declaration, u32 acpi_id, phys_cpuid_t *apic_id)
{
struct acpi_madt_local_x2apic *apic =
container_of(entry, struct acpi_madt_local_x2apic, header);
@@ -65,7 +65,7 @@ static int map_x2apic_id(struct acpi_subtable_header *entry,
}
static int map_lsapic_id(struct acpi_subtable_header *entry,
- int device_declaration, u32 acpi_id, int *apic_id)
+ int device_declaration, u32 acpi_id, phys_cpuid_t *apic_id)
{
struct acpi_madt_local_sapic *lsapic =
container_of(entry, struct acpi_madt_local_sapic, header);
@@ -83,10 +83,35 @@ static int map_lsapic_id(struct acpi_subtable_header *entry,
return 0;
}
-static int map_madt_entry(int type, u32 acpi_id)
+/*
+ * Retrieve the ARM CPU physical identifier (MPIDR)
+ */
+static int map_gicc_mpidr(struct acpi_subtable_header *entry,
+ int device_declaration, u32 acpi_id, phys_cpuid_t *mpidr)
+{
+ struct acpi_madt_generic_interrupt *gicc =
+ container_of(entry, struct acpi_madt_generic_interrupt, header);
+
+ if (!(gicc->flags & ACPI_MADT_ENABLED))
+ return -ENODEV;
+
+ /* device_declaration means Device object in DSDT, in the
+ * GIC interrupt model, logical processors are required to
+ * have a Processor Device object in the DSDT, so we should
+ * check device_declaration here
+ */
+ if (device_declaration && (gicc->uid == acpi_id)) {
+ *mpidr = gicc->arm_mpidr;
+ return 0;
+ }
+
+ return -EINVAL;
+}
+
+static phys_cpuid_t map_madt_entry(int type, u32 acpi_id)
{
unsigned long madt_end, entry;
- int phys_id = -1; /* CPU hardware ID */
+ phys_cpuid_t phys_id = PHYS_CPUID_INVALID; /* CPU hardware ID */
struct acpi_table_madt *madt;
madt = get_madt_table();
@@ -111,18 +136,21 @@ static int map_madt_entry(int type, u32 acpi_id)
} else if (header->type == ACPI_MADT_TYPE_LOCAL_SAPIC) {
if (!map_lsapic_id(header, type, acpi_id, &phys_id))
break;
+ } else if (header->type == ACPI_MADT_TYPE_GENERIC_INTERRUPT) {
+ if (!map_gicc_mpidr(header, type, acpi_id, &phys_id))
+ break;
}
entry += header->length;
}
return phys_id;
}
-static int map_mat_entry(acpi_handle handle, int type, u32 acpi_id)
+static phys_cpuid_t map_mat_entry(acpi_handle handle, int type, u32 acpi_id)
{
struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL };
union acpi_object *obj;
struct acpi_subtable_header *header;
- int phys_id = -1;
+ phys_cpuid_t phys_id = PHYS_CPUID_INVALID;
if (ACPI_FAILURE(acpi_evaluate_object(handle, "_MAT", NULL, &buffer)))
goto exit;
@@ -143,33 +171,35 @@ static int map_mat_entry(acpi_handle handle, int type, u32 acpi_id)
map_lsapic_id(header, type, acpi_id, &phys_id);
else if (header->type == ACPI_MADT_TYPE_LOCAL_X2APIC)
map_x2apic_id(header, type, acpi_id, &phys_id);
+ else if (header->type == ACPI_MADT_TYPE_GENERIC_INTERRUPT)
+ map_gicc_mpidr(header, type, acpi_id, &phys_id);
exit:
kfree(buffer.pointer);
return phys_id;
}
-int acpi_get_phys_id(acpi_handle handle, int type, u32 acpi_id)
+phys_cpuid_t acpi_get_phys_id(acpi_handle handle, int type, u32 acpi_id)
{
- int phys_id;
+ phys_cpuid_t phys_id;
phys_id = map_mat_entry(handle, type, acpi_id);
- if (phys_id == -1)
+ if (phys_id == PHYS_CPUID_INVALID)
phys_id = map_madt_entry(type, acpi_id);
return phys_id;
}
-int acpi_map_cpuid(int phys_id, u32 acpi_id)
+int acpi_map_cpuid(phys_cpuid_t phys_id, u32 acpi_id)
{
#ifdef CONFIG_SMP
int i;
#endif
- if (phys_id == -1) {
+ if (phys_id == PHYS_CPUID_INVALID) {
/*
* On UP processor, there is no _MAT or MADT table.
- * So above phys_id is always set to -1.
+ * So above phys_id is always set to PHYS_CPUID_INVALID.
*
* BIOS may define multiple CPU handles even for UP processor.
* For example,
@@ -190,7 +220,7 @@ int acpi_map_cpuid(int phys_id, u32 acpi_id)
if (nr_cpu_ids <= 1 && acpi_id == 0)
return acpi_id;
else
- return phys_id;
+ return -1;
}
#ifdef CONFIG_SMP
@@ -208,7 +238,7 @@ int acpi_map_cpuid(int phys_id, u32 acpi_id)
int acpi_get_cpuid(acpi_handle handle, int type, u32 acpi_id)
{
- int phys_id;
+ phys_cpuid_t phys_id;
phys_id = acpi_get_phys_id(handle, type, acpi_id);
diff --git a/drivers/acpi/tables.c b/drivers/acpi/tables.c
index 93b81523a2fe..2e19189da0ee 100644
--- a/drivers/acpi/tables.c
+++ b/drivers/acpi/tables.c
@@ -23,6 +23,8 @@
*
*/
+/* Uncomment next line to get verbose printout */
+/* #define DEBUG */
#define pr_fmt(fmt) "ACPI: " fmt
#include <linux/init.h>
@@ -61,9 +63,9 @@ void acpi_table_print_madt_entry(struct acpi_subtable_header *header)
{
struct acpi_madt_local_apic *p =
(struct acpi_madt_local_apic *)header;
- pr_info("LAPIC (acpi_id[0x%02x] lapic_id[0x%02x] %s)\n",
- p->processor_id, p->id,
- (p->lapic_flags & ACPI_MADT_ENABLED) ? "enabled" : "disabled");
+ pr_debug("LAPIC (acpi_id[0x%02x] lapic_id[0x%02x] %s)\n",
+ p->processor_id, p->id,
+ (p->lapic_flags & ACPI_MADT_ENABLED) ? "enabled" : "disabled");
}
break;
@@ -71,9 +73,9 @@ void acpi_table_print_madt_entry(struct acpi_subtable_header *header)
{
struct acpi_madt_local_x2apic *p =
(struct acpi_madt_local_x2apic *)header;
- pr_info("X2APIC (apic_id[0x%02x] uid[0x%02x] %s)\n",
- p->local_apic_id, p->uid,
- (p->lapic_flags & ACPI_MADT_ENABLED) ? "enabled" : "disabled");
+ pr_debug("X2APIC (apic_id[0x%02x] uid[0x%02x] %s)\n",
+ p->local_apic_id, p->uid,
+ (p->lapic_flags & ACPI_MADT_ENABLED) ? "enabled" : "disabled");
}
break;
@@ -81,8 +83,8 @@ void acpi_table_print_madt_entry(struct acpi_subtable_header *header)
{
struct acpi_madt_io_apic *p =
(struct acpi_madt_io_apic *)header;
- pr_info("IOAPIC (id[0x%02x] address[0x%08x] gsi_base[%d])\n",
- p->id, p->address, p->global_irq_base);
+ pr_debug("IOAPIC (id[0x%02x] address[0x%08x] gsi_base[%d])\n",
+ p->id, p->address, p->global_irq_base);
}
break;
@@ -155,9 +157,9 @@ void acpi_table_print_madt_entry(struct acpi_subtable_header *header)
{
struct acpi_madt_io_sapic *p =
(struct acpi_madt_io_sapic *)header;
- pr_info("IOSAPIC (id[0x%x] address[%p] gsi_base[%d])\n",
- p->id, (void *)(unsigned long)p->address,
- p->global_irq_base);
+ pr_debug("IOSAPIC (id[0x%x] address[%p] gsi_base[%d])\n",
+ p->id, (void *)(unsigned long)p->address,
+ p->global_irq_base);
}
break;
@@ -165,9 +167,9 @@ void acpi_table_print_madt_entry(struct acpi_subtable_header *header)
{
struct acpi_madt_local_sapic *p =
(struct acpi_madt_local_sapic *)header;
- pr_info("LSAPIC (acpi_id[0x%02x] lsapic_id[0x%02x] lsapic_eid[0x%02x] %s)\n",
- p->processor_id, p->id, p->eid,
- (p->lapic_flags & ACPI_MADT_ENABLED) ? "enabled" : "disabled");
+ pr_debug("LSAPIC (acpi_id[0x%02x] lsapic_id[0x%02x] lsapic_eid[0x%02x] %s)\n",
+ p->processor_id, p->id, p->eid,
+ (p->lapic_flags & ACPI_MADT_ENABLED) ? "enabled" : "disabled");
}
break;
@@ -183,6 +185,28 @@ void acpi_table_print_madt_entry(struct acpi_subtable_header *header)
}
break;
+ case ACPI_MADT_TYPE_GENERIC_INTERRUPT:
+ {
+ struct acpi_madt_generic_interrupt *p =
+ (struct acpi_madt_generic_interrupt *)header;
+ pr_debug("GICC (acpi_id[0x%04x] address[%llx] MPIDR[0x%llx] %s)\n",
+ p->uid, p->base_address,
+ p->arm_mpidr,
+ (p->flags & ACPI_MADT_ENABLED) ? "enabled" : "disabled");
+
+ }
+ break;
+
+ case ACPI_MADT_TYPE_GENERIC_DISTRIBUTOR:
+ {
+ struct acpi_madt_generic_distributor *p =
+ (struct acpi_madt_generic_distributor *)header;
+ pr_debug("GIC Distributor (gic_id[0x%04x] address[%llx] gsi_base[%d])\n",
+ p->gic_id, p->base_address,
+ p->global_irq_base);
+ }
+ break;
+
default:
pr_warn("Found unsupported MADT entry (type = 0x%x)\n",
header->type);
diff --git a/drivers/clocksource/arm_arch_timer.c b/drivers/clocksource/arm_arch_timer.c
index 266469691e58..0aa135ddbf80 100644
--- a/drivers/clocksource/arm_arch_timer.c
+++ b/drivers/clocksource/arm_arch_timer.c
@@ -22,6 +22,7 @@
#include <linux/io.h>
#include <linux/slab.h>
#include <linux/sched_clock.h>
+#include <linux/acpi.h>
#include <asm/arch_timer.h>
#include <asm/virt.h>
@@ -371,8 +372,12 @@ arch_timer_detect_rate(void __iomem *cntbase, struct device_node *np)
if (arch_timer_rate)
return;
- /* Try to determine the frequency from the device tree or CNTFRQ */
- if (of_property_read_u32(np, "clock-frequency", &arch_timer_rate)) {
+ /*
+ * Try to determine the frequency from the device tree or CNTFRQ,
+ * if ACPI is enabled, get the frequency from CNTFRQ ONLY.
+ */
+ if (!acpi_disabled ||
+ of_property_read_u32(np, "clock-frequency", &arch_timer_rate)) {
if (cntbase)
arch_timer_rate = readl_relaxed(cntbase + CNTFRQ);
else
@@ -691,28 +696,8 @@ static void __init arch_timer_common_init(void)
arch_timer_arch_init();
}
-static void __init arch_timer_init(struct device_node *np)
+static void __init arch_timer_init(void)
{
- int i;
-
- if (arch_timers_present & ARCH_CP15_TIMER) {
- pr_warn("arch_timer: multiple nodes in dt, skipping\n");
- return;
- }
-
- arch_timers_present |= ARCH_CP15_TIMER;
- for (i = PHYS_SECURE_PPI; i < MAX_TIMER_PPI; i++)
- arch_timer_ppi[i] = irq_of_parse_and_map(np, i);
- arch_timer_detect_rate(NULL, np);
-
- /*
- * If we cannot rely on firmware initializing the timer registers then
- * we should use the physical timers instead.
- */
- if (IS_ENABLED(CONFIG_ARM) &&
- of_property_read_bool(np, "arm,cpu-registers-not-fw-configured"))
- arch_timer_use_virtual = false;
-
/*
* If HYP mode is available, we know that the physical timer
* has been configured to be accessible from PL1. Use it, so
@@ -731,13 +716,39 @@ static void __init arch_timer_init(struct device_node *np)
}
}
- arch_timer_c3stop = !of_property_read_bool(np, "always-on");
-
arch_timer_register();
arch_timer_common_init();
}
-CLOCKSOURCE_OF_DECLARE(armv7_arch_timer, "arm,armv7-timer", arch_timer_init);
-CLOCKSOURCE_OF_DECLARE(armv8_arch_timer, "arm,armv8-timer", arch_timer_init);
+
+static void __init arch_timer_of_init(struct device_node *np)
+{
+ int i;
+
+ if (arch_timers_present & ARCH_CP15_TIMER) {
+ pr_warn("arch_timer: multiple nodes in dt, skipping\n");
+ return;
+ }
+
+ arch_timers_present |= ARCH_CP15_TIMER;
+ for (i = PHYS_SECURE_PPI; i < MAX_TIMER_PPI; i++)
+ arch_timer_ppi[i] = irq_of_parse_and_map(np, i);
+
+ arch_timer_detect_rate(NULL, np);
+
+ arch_timer_c3stop = !of_property_read_bool(np, "always-on");
+
+ /*
+ * If we cannot rely on firmware initializing the timer registers then
+ * we should use the physical timers instead.
+ */
+ if (IS_ENABLED(CONFIG_ARM) &&
+ of_property_read_bool(np, "arm,cpu-registers-not-fw-configured"))
+ arch_timer_use_virtual = false;
+
+ arch_timer_init();
+}
+CLOCKSOURCE_OF_DECLARE(armv7_arch_timer, "arm,armv7-timer", arch_timer_of_init);
+CLOCKSOURCE_OF_DECLARE(armv8_arch_timer, "arm,armv8-timer", arch_timer_of_init);
static void __init arch_timer_mem_init(struct device_node *np)
{
@@ -804,3 +815,70 @@ static void __init arch_timer_mem_init(struct device_node *np)
}
CLOCKSOURCE_OF_DECLARE(armv7_arch_timer_mem, "arm,armv7-timer-mem",
arch_timer_mem_init);
+
+#ifdef CONFIG_ACPI
+static int __init map_generic_timer_interrupt(u32 interrupt, u32 flags)
+{
+ int trigger, polarity;
+
+ if (!interrupt)
+ return 0;
+
+ trigger = (flags & ACPI_GTDT_INTERRUPT_MODE) ? ACPI_EDGE_SENSITIVE
+ : ACPI_LEVEL_SENSITIVE;
+
+ polarity = (flags & ACPI_GTDT_INTERRUPT_POLARITY) ? ACPI_ACTIVE_LOW
+ : ACPI_ACTIVE_HIGH;
+
+ return acpi_register_gsi(NULL, interrupt, trigger, polarity);
+}
+
+/* Initialize per-processor generic timer */
+static int __init arch_timer_acpi_init(struct acpi_table_header *table)
+{
+ struct acpi_table_gtdt *gtdt;
+
+ if (arch_timers_present & ARCH_CP15_TIMER) {
+ pr_warn("arch_timer: already initialized, skipping\n");
+ return -EINVAL;
+ }
+
+ gtdt = container_of(table, struct acpi_table_gtdt, header);
+
+ arch_timers_present |= ARCH_CP15_TIMER;
+
+ arch_timer_ppi[PHYS_SECURE_PPI] =
+ map_generic_timer_interrupt(gtdt->secure_el1_interrupt,
+ gtdt->secure_el1_flags);
+
+ arch_timer_ppi[PHYS_NONSECURE_PPI] =
+ map_generic_timer_interrupt(gtdt->non_secure_el1_interrupt,
+ gtdt->non_secure_el1_flags);
+
+ arch_timer_ppi[VIRT_PPI] =
+ map_generic_timer_interrupt(gtdt->virtual_timer_interrupt,
+ gtdt->virtual_timer_flags);
+
+ arch_timer_ppi[HYP_PPI] =
+ map_generic_timer_interrupt(gtdt->non_secure_el2_interrupt,
+ gtdt->non_secure_el2_flags);
+
+ /* Get the frequency from CNTFRQ */
+ arch_timer_detect_rate(NULL, NULL);
+
+ /* Always-on capability */
+ arch_timer_c3stop = !(gtdt->non_secure_el1_flags & ACPI_GTDT_ALWAYS_ON);
+
+ arch_timer_init();
+ return 0;
+}
+
+/* Initialize all the generic timers presented in GTDT */
+void __init acpi_generic_timer_init(void)
+{
+ if (acpi_disabled)
+ return;
+
+ acpi_table_parse(ACPI_SIG_GTDT, arch_timer_acpi_init);
+}
+#endif
diff --git a/drivers/irqchip/irq-gic.c b/drivers/irqchip/irq-gic.c
index a6ce3476834e..7b315e385ba3 100644
--- a/drivers/irqchip/irq-gic.c
+++ b/drivers/irqchip/irq-gic.c
@@ -33,12 +33,14 @@
#include <linux/of.h>
#include <linux/of_address.h>
#include <linux/of_irq.h>
+#include <linux/acpi.h>
#include <linux/irqdomain.h>
#include <linux/interrupt.h>
#include <linux/percpu.h>
#include <linux/slab.h>
#include <linux/irqchip/chained_irq.h>
#include <linux/irqchip/arm-gic.h>
+#include <linux/irqchip/arm-gic-acpi.h>
#include <asm/cputype.h>
#include <asm/irq.h>
@@ -1107,3 +1109,105 @@ IRQCHIP_DECLARE(msm_8660_qgic, "qcom,msm-8660-qgic", gic_of_init);
IRQCHIP_DECLARE(msm_qgic2, "qcom,msm-qgic2", gic_of_init);
#endif
+
+#ifdef CONFIG_ACPI
+static phys_addr_t dist_phy_base, cpu_phy_base __initdata;
+
+static int __init
+gic_acpi_parse_madt_cpu(struct acpi_subtable_header *header,
+ const unsigned long end)
+{
+ struct acpi_madt_generic_interrupt *processor;
+ phys_addr_t gic_cpu_base;
+ static int cpu_base_assigned;
+
+ processor = (struct acpi_madt_generic_interrupt *)header;
+
+ if (BAD_MADT_ENTRY(processor, end))
+ return -EINVAL;
+
+ /*
+ * There is no support for non-banked GICv1/2 register in ACPI spec.
+ * All CPU interface addresses have to be the same.
+ */
+ gic_cpu_base = processor->base_address;
+ if (cpu_base_assigned && gic_cpu_base != cpu_phy_base)
+ return -EINVAL;
+
+ cpu_phy_base = gic_cpu_base;
+ cpu_base_assigned = 1;
+ return 0;
+}
+
+static int __init
+gic_acpi_parse_madt_distributor(struct acpi_subtable_header *header,
+ const unsigned long end)
+{
+ struct acpi_madt_generic_distributor *dist;
+
+ dist = (struct acpi_madt_generic_distributor *)header;
+
+ if (BAD_MADT_ENTRY(dist, end))
+ return -EINVAL;
+
+ dist_phy_base = dist->base_address;
+ return 0;
+}
+
+int __init
+gic_v2_acpi_init(struct acpi_table_header *table)
+{
+ void __iomem *cpu_base, *dist_base;
+ int count;
+
+ /* Collect CPU base addresses */
+ count = acpi_parse_entries(ACPI_SIG_MADT,
+ sizeof(struct acpi_table_madt),
+ gic_acpi_parse_madt_cpu, table,
+ ACPI_MADT_TYPE_GENERIC_INTERRUPT, 0);
+ if (count <= 0) {
+ pr_err("No valid GICC entries exist\n");
+ return -EINVAL;
+ }
+
+ /*
+ * Find distributor base address. We expect one distributor entry since
+ * ACPI 5.1 spec neither support multi-GIC instances nor GIC cascade.
+ */
+ count = acpi_parse_entries(ACPI_SIG_MADT,
+ sizeof(struct acpi_table_madt),
+ gic_acpi_parse_madt_distributor, table,
+ ACPI_MADT_TYPE_GENERIC_DISTRIBUTOR, 0);
+ if (count <= 0) {
+ pr_err("No valid GICD entries exist\n");
+ return -EINVAL;
+ } else if (count > 1) {
+ pr_err("More than one GICD entry detected\n");
+ return -EINVAL;
+ }
+
+ cpu_base = ioremap(cpu_phy_base, ACPI_GIC_CPU_IF_MEM_SIZE);
+ if (!cpu_base) {
+ pr_err("Unable to map GICC registers\n");
+ return -ENOMEM;
+ }
+
+ dist_base = ioremap(dist_phy_base, ACPI_GICV2_DIST_MEM_SIZE);
+ if (!dist_base) {
+ pr_err("Unable to map GICD registers\n");
+ iounmap(cpu_base);
+ return -ENOMEM;
+ }
+
+ /*
+ * Initialize zero GIC instance (no multi-GIC support). Also, set GIC
+ * as default IRQ domain to allow for GSI registration and GSI to IRQ
+ * number translation (see acpi_register_gsi() and acpi_gsi_to_irq()).
+ */
+ gic_init_bases(0, -1, dist_base, cpu_base, 0, NULL);
+ irq_set_default_host(gic_data[0].domain);
+
+ acpi_irq_model = ACPI_IRQ_MODEL_GIC;
+ return 0;
+}
+#endif
diff --git a/drivers/irqchip/irqchip.c b/drivers/irqchip/irqchip.c
index 0fe2f718d81c..afd1af3dfe5a 100644
--- a/drivers/irqchip/irqchip.c
+++ b/drivers/irqchip/irqchip.c
@@ -8,6 +8,7 @@
* warranty of any kind, whether express or implied.
*/
+#include <linux/acpi_irq.h>
#include <linux/init.h>
#include <linux/of_irq.h>
#include <linux/irqchip.h>
@@ -26,4 +27,6 @@ extern struct of_device_id __irqchip_of_table[];
void __init irqchip_init(void)
{
of_irq_init(__irqchip_of_table);
+
+ acpi_irq_init();
}
diff --git a/drivers/xen/Kconfig b/drivers/xen/Kconfig
index a270004c9605..7cd226da15fe 100644
--- a/drivers/xen/Kconfig
+++ b/drivers/xen/Kconfig
@@ -276,4 +276,8 @@ config XEN_AUTO_XLATE
help
Support for auto-translated physmap guests.
+config XEN_ACPI
+ def_bool y
+ depends on X86 && ACPI
+
endmenu
diff --git a/drivers/xen/Makefile b/drivers/xen/Makefile
index 40edd1cbb60d..e293bc507cbc 100644
--- a/drivers/xen/Makefile
+++ b/drivers/xen/Makefile
@@ -13,7 +13,7 @@ CFLAGS_efi.o += -fshort-wchar
dom0-$(CONFIG_PCI) += pci.o
dom0-$(CONFIG_USB_SUPPORT) += dbgp.o
-dom0-$(CONFIG_ACPI) += acpi.o $(xen-pad-y)
+dom0-$(CONFIG_XEN_ACPI) += acpi.o $(xen-pad-y)
xen-pad-$(CONFIG_X86) += xen-acpi-pad.o
dom0-$(CONFIG_X86) += pcpu.o
obj-$(CONFIG_XEN_DOM0) += $(dom0-y)
generated by cgit v1.2.3 (git 2.39.1) at 2024-10-07 22:22:10 +0000