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path: root/drivers/acpi/apei/ghes.c
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Diffstat (limited to 'drivers/acpi/apei/ghes.c')
-rw-r--r--drivers/acpi/apei/ghes.c253
1 files changed, 205 insertions, 48 deletions
diff --git a/drivers/acpi/apei/ghes.c b/drivers/acpi/apei/ghes.c
index d0855c09f32f..d661d452b238 100644
--- a/drivers/acpi/apei/ghes.c
+++ b/drivers/acpi/apei/ghes.c
@@ -45,10 +45,14 @@
#include <linux/aer.h>
#include <linux/nmi.h>
#include <linux/sched/clock.h>
+#include <linux/uuid.h>
+#include <linux/ras.h>
+#include <acpi/actbl1.h>
#include <acpi/ghes.h>
#include <acpi/apei.h>
#include <asm/tlbflush.h>
+#include <ras/ras_event.h>
#include "apei-internal.h"
@@ -80,6 +84,11 @@
((struct acpi_hest_generic_status *) \
((struct ghes_estatus_node *)(estatus_node) + 1))
+static inline bool is_hest_type_generic_v2(struct ghes *ghes)
+{
+ return ghes->generic->header.type == ACPI_HEST_TYPE_GENERIC_ERROR_V2;
+}
+
/*
* This driver isn't really modular, however for the time being,
* continuing to use module_param is the easiest way to remain
@@ -89,14 +98,14 @@ bool ghes_disable;
module_param_named(disable, ghes_disable, bool, 0);
/*
- * All error sources notified with SCI shares one notifier function,
- * so they need to be linked and checked one by one. This is applied
- * to NMI too.
+ * All error sources notified with HED (Hardware Error Device) share a
+ * single notifier callback, so they need to be linked and checked one
+ * by one. This holds true for NMI too.
*
* RCU is used for these lists, so ghes_list_mutex is only used for
* list changing, not for traversing.
*/
-static LIST_HEAD(ghes_sci);
+static LIST_HEAD(ghes_hed);
static DEFINE_MUTEX(ghes_list_mutex);
/*
@@ -110,11 +119,7 @@ static DEFINE_MUTEX(ghes_list_mutex);
* Two virtual pages are used, one for IRQ/PROCESS context, the other for
* NMI context (optionally).
*/
-#ifdef CONFIG_HAVE_ACPI_APEI_NMI
#define GHES_IOREMAP_PAGES 2
-#else
-#define GHES_IOREMAP_PAGES 1
-#endif
#define GHES_IOREMAP_IRQ_PAGE(base) (base)
#define GHES_IOREMAP_NMI_PAGE(base) ((base) + PAGE_SIZE)
@@ -133,6 +138,8 @@ static unsigned long ghes_estatus_pool_size_request;
static struct ghes_estatus_cache *ghes_estatus_caches[GHES_ESTATUS_CACHES_SIZE];
static atomic_t ghes_estatus_cache_alloced;
+static int ghes_panic_timeout __read_mostly = 30;
+
static int ghes_ioremap_init(void)
{
ghes_ioremap_area = __get_vm_area(PAGE_SIZE * GHES_IOREMAP_PAGES,
@@ -153,10 +160,14 @@ static void ghes_ioremap_exit(void)
static void __iomem *ghes_ioremap_pfn_nmi(u64 pfn)
{
unsigned long vaddr;
+ phys_addr_t paddr;
+ pgprot_t prot;
vaddr = (unsigned long)GHES_IOREMAP_NMI_PAGE(ghes_ioremap_area->addr);
- ioremap_page_range(vaddr, vaddr + PAGE_SIZE,
- pfn << PAGE_SHIFT, PAGE_KERNEL);
+
+ paddr = pfn << PAGE_SHIFT;
+ prot = arch_apei_get_mem_attribute(paddr);
+ ioremap_page_range(vaddr, vaddr + PAGE_SIZE, paddr, prot);
return (void __iomem *)vaddr;
}
@@ -240,6 +251,16 @@ static int ghes_estatus_pool_expand(unsigned long len)
return 0;
}
+static int map_gen_v2(struct ghes *ghes)
+{
+ return apei_map_generic_address(&ghes->generic_v2->read_ack_register);
+}
+
+static void unmap_gen_v2(struct ghes *ghes)
+{
+ apei_unmap_generic_address(&ghes->generic_v2->read_ack_register);
+}
+
static struct ghes *ghes_new(struct acpi_hest_generic *generic)
{
struct ghes *ghes;
@@ -249,10 +270,17 @@ static struct ghes *ghes_new(struct acpi_hest_generic *generic)
ghes = kzalloc(sizeof(*ghes), GFP_KERNEL);
if (!ghes)
return ERR_PTR(-ENOMEM);
+
ghes->generic = generic;
+ if (is_hest_type_generic_v2(ghes)) {
+ rc = map_gen_v2(ghes);
+ if (rc)
+ goto err_free;
+ }
+
rc = apei_map_generic_address(&generic->error_status_address);
if (rc)
- goto err_free;
+ goto err_unmap_read_ack_addr;
error_block_length = generic->error_block_length;
if (error_block_length > GHES_ESTATUS_MAX_SIZE) {
pr_warning(FW_WARN GHES_PFX
@@ -264,13 +292,16 @@ static struct ghes *ghes_new(struct acpi_hest_generic *generic)
ghes->estatus = kmalloc(error_block_length, GFP_KERNEL);
if (!ghes->estatus) {
rc = -ENOMEM;
- goto err_unmap;
+ goto err_unmap_status_addr;
}
return ghes;
-err_unmap:
+err_unmap_status_addr:
apei_unmap_generic_address(&generic->error_status_address);
+err_unmap_read_ack_addr:
+ if (is_hest_type_generic_v2(ghes))
+ unmap_gen_v2(ghes);
err_free:
kfree(ghes);
return ERR_PTR(rc);
@@ -280,6 +311,8 @@ static void ghes_fini(struct ghes *ghes)
{
kfree(ghes->estatus);
apei_unmap_generic_address(&ghes->generic->error_status_address);
+ if (is_hest_type_generic_v2(ghes))
+ unmap_gen_v2(ghes);
}
static inline int ghes_severity(int severity)
@@ -400,8 +433,7 @@ static void ghes_handle_memory_failure(struct acpi_hest_generic_data *gdata, int
unsigned long pfn;
int flags = -1;
int sec_sev = ghes_severity(gdata->error_severity);
- struct cper_sec_mem_err *mem_err;
- mem_err = (struct cper_sec_mem_err *)(gdata + 1);
+ struct cper_sec_mem_err *mem_err = acpi_hest_get_payload(gdata);
if (!(mem_err->validation_bits & CPER_MEM_VALID_PA))
return;
@@ -431,24 +463,32 @@ static void ghes_do_proc(struct ghes *ghes,
{
int sev, sec_sev;
struct acpi_hest_generic_data *gdata;
+ guid_t *sec_type;
+ guid_t *fru_id = &NULL_UUID_LE;
+ char *fru_text = "";
sev = ghes_severity(estatus->error_severity);
apei_estatus_for_each_section(estatus, gdata) {
+ sec_type = (guid_t *)gdata->section_type;
sec_sev = ghes_severity(gdata->error_severity);
- if (!uuid_le_cmp(*(uuid_le *)gdata->section_type,
- CPER_SEC_PLATFORM_MEM)) {
- struct cper_sec_mem_err *mem_err;
- mem_err = (struct cper_sec_mem_err *)(gdata+1);
+ if (gdata->validation_bits & CPER_SEC_VALID_FRU_ID)
+ fru_id = (guid_t *)gdata->fru_id;
+
+ if (gdata->validation_bits & CPER_SEC_VALID_FRU_TEXT)
+ fru_text = gdata->fru_text;
+
+ if (guid_equal(sec_type, &CPER_SEC_PLATFORM_MEM)) {
+ struct cper_sec_mem_err *mem_err = acpi_hest_get_payload(gdata);
+
ghes_edac_report_mem_error(ghes, sev, mem_err);
arch_apei_report_mem_error(sev, mem_err);
ghes_handle_memory_failure(gdata, sev);
}
#ifdef CONFIG_ACPI_APEI_PCIEAER
- else if (!uuid_le_cmp(*(uuid_le *)gdata->section_type,
- CPER_SEC_PCIE)) {
- struct cper_sec_pcie *pcie_err;
- pcie_err = (struct cper_sec_pcie *)(gdata+1);
+ else if (guid_equal(sec_type, &CPER_SEC_PCIE)) {
+ struct cper_sec_pcie *pcie_err = acpi_hest_get_payload(gdata);
+
if (sev == GHES_SEV_RECOVERABLE &&
sec_sev == GHES_SEV_RECOVERABLE &&
pcie_err->validation_bits & CPER_PCIE_VALID_DEVICE_ID &&
@@ -477,6 +517,17 @@ static void ghes_do_proc(struct ghes *ghes,
}
#endif
+ else if (guid_equal(sec_type, &CPER_SEC_PROC_ARM)) {
+ struct cper_sec_proc_arm *err = acpi_hest_get_payload(gdata);
+
+ log_arm_hw_error(err);
+ } else {
+ void *err = acpi_hest_get_payload(gdata);
+
+ log_non_standard_event(sec_type, fru_id, fru_text,
+ sec_sev, err,
+ gdata->error_data_length);
+ }
}
}
@@ -649,6 +700,31 @@ static void ghes_estatus_cache_add(
rcu_read_unlock();
}
+static int ghes_ack_error(struct acpi_hest_generic_v2 *gv2)
+{
+ int rc;
+ u64 val = 0;
+
+ rc = apei_read(&val, &gv2->read_ack_register);
+ if (rc)
+ return rc;
+
+ val &= gv2->read_ack_preserve << gv2->read_ack_register.bit_offset;
+ val |= gv2->read_ack_write << gv2->read_ack_register.bit_offset;
+
+ return apei_write(val, &gv2->read_ack_register);
+}
+
+static void __ghes_panic(struct ghes *ghes)
+{
+ __ghes_print_estatus(KERN_EMERG, ghes->generic, ghes->estatus);
+
+ /* reboot to log the error! */
+ if (!panic_timeout)
+ panic_timeout = ghes_panic_timeout;
+ panic("Fatal hardware error!");
+}
+
static int ghes_proc(struct ghes *ghes)
{
int rc;
@@ -656,11 +732,26 @@ static int ghes_proc(struct ghes *ghes)
rc = ghes_read_estatus(ghes, 0);
if (rc)
goto out;
+
+ if (ghes_severity(ghes->estatus->error_severity) >= GHES_SEV_PANIC) {
+ __ghes_panic(ghes);
+ }
+
if (!ghes_estatus_cached(ghes->estatus)) {
if (ghes_print_estatus(NULL, ghes->generic, ghes->estatus))
ghes_estatus_cache_add(ghes->generic, ghes->estatus);
}
ghes_do_proc(ghes, ghes->estatus);
+
+ /*
+ * GHESv2 type HEST entries introduce support for error acknowledgment,
+ * so only acknowledge the error if this support is present.
+ */
+ if (is_hest_type_generic_v2(ghes)) {
+ rc = ghes_ack_error(ghes->generic_v2);
+ if (rc)
+ return rc;
+ }
out:
ghes_clear_estatus(ghes);
return rc;
@@ -702,14 +793,14 @@ static irqreturn_t ghes_irq_func(int irq, void *data)
return IRQ_HANDLED;
}
-static int ghes_notify_sci(struct notifier_block *this,
- unsigned long event, void *data)
+static int ghes_notify_hed(struct notifier_block *this, unsigned long event,
+ void *data)
{
struct ghes *ghes;
int ret = NOTIFY_DONE;
rcu_read_lock();
- list_for_each_entry_rcu(ghes, &ghes_sci, list) {
+ list_for_each_entry_rcu(ghes, &ghes_hed, list) {
if (!ghes_proc(ghes))
ret = NOTIFY_OK;
}
@@ -718,10 +809,59 @@ static int ghes_notify_sci(struct notifier_block *this,
return ret;
}
-static struct notifier_block ghes_notifier_sci = {
- .notifier_call = ghes_notify_sci,
+static struct notifier_block ghes_notifier_hed = {
+ .notifier_call = ghes_notify_hed,
};
+#ifdef CONFIG_ACPI_APEI_SEA
+static LIST_HEAD(ghes_sea);
+
+/*
+ * Return 0 only if one of the SEA error sources successfully reported an error
+ * record sent from the firmware.
+ */
+int ghes_notify_sea(void)
+{
+ struct ghes *ghes;
+ int ret = -ENOENT;
+
+ rcu_read_lock();
+ list_for_each_entry_rcu(ghes, &ghes_sea, list) {
+ if (!ghes_proc(ghes))
+ ret = 0;
+ }
+ rcu_read_unlock();
+ return ret;
+}
+
+static void ghes_sea_add(struct ghes *ghes)
+{
+ mutex_lock(&ghes_list_mutex);
+ list_add_rcu(&ghes->list, &ghes_sea);
+ mutex_unlock(&ghes_list_mutex);
+}
+
+static void ghes_sea_remove(struct ghes *ghes)
+{
+ mutex_lock(&ghes_list_mutex);
+ list_del_rcu(&ghes->list);
+ mutex_unlock(&ghes_list_mutex);
+ synchronize_rcu();
+}
+#else /* CONFIG_ACPI_APEI_SEA */
+static inline void ghes_sea_add(struct ghes *ghes)
+{
+ pr_err(GHES_PFX "ID: %d, trying to add SEA notification which is not supported\n",
+ ghes->generic->header.source_id);
+}
+
+static inline void ghes_sea_remove(struct ghes *ghes)
+{
+ pr_err(GHES_PFX "ID: %d, trying to remove SEA notification which is not supported\n",
+ ghes->generic->header.source_id);
+}
+#endif /* CONFIG_ACPI_APEI_SEA */
+
#ifdef CONFIG_HAVE_ACPI_APEI_NMI
/*
* printk is not safe in NMI context. So in NMI handler, we allocate
@@ -742,8 +882,6 @@ static atomic_t ghes_in_nmi = ATOMIC_INIT(0);
static LIST_HEAD(ghes_nmi);
-static int ghes_panic_timeout __read_mostly = 30;
-
static void ghes_proc_in_irq(struct irq_work *irq_work)
{
struct llist_node *llnode, *next;
@@ -829,18 +967,6 @@ static void __process_error(struct ghes *ghes)
#endif
}
-static void __ghes_panic(struct ghes *ghes)
-{
- oops_begin();
- ghes_print_queued_estatus();
- __ghes_print_estatus(KERN_EMERG, ghes->generic, ghes->estatus);
-
- /* reboot to log the error! */
- if (panic_timeout == 0)
- panic_timeout = ghes_panic_timeout;
- panic("Fatal hardware error!");
-}
-
static int ghes_notify_nmi(unsigned int cmd, struct pt_regs *regs)
{
struct ghes *ghes;
@@ -858,8 +984,11 @@ static int ghes_notify_nmi(unsigned int cmd, struct pt_regs *regs)
}
sev = ghes_severity(ghes->estatus->error_severity);
- if (sev >= GHES_SEV_PANIC)
+ if (sev >= GHES_SEV_PANIC) {
+ oops_begin();
+ ghes_print_queued_estatus();
__ghes_panic(ghes);
+ }
if (!(ghes->flags & GHES_TO_CLEAR))
continue;
@@ -966,6 +1095,17 @@ static int ghes_probe(struct platform_device *ghes_dev)
case ACPI_HEST_NOTIFY_POLLED:
case ACPI_HEST_NOTIFY_EXTERNAL:
case ACPI_HEST_NOTIFY_SCI:
+ case ACPI_HEST_NOTIFY_GSIV:
+ case ACPI_HEST_NOTIFY_GPIO:
+ break;
+
+ case ACPI_HEST_NOTIFY_SEA:
+ if (!IS_ENABLED(CONFIG_ACPI_APEI_SEA)) {
+ pr_warn(GHES_PFX "Generic hardware error source: %d notified via SEA is not supported\n",
+ generic->header.source_id);
+ rc = -ENOTSUPP;
+ goto err;
+ }
break;
case ACPI_HEST_NOTIFY_NMI:
if (!IS_ENABLED(CONFIG_HAVE_ACPI_APEI_NMI)) {
@@ -1024,13 +1164,20 @@ static int ghes_probe(struct platform_device *ghes_dev)
goto err_edac_unreg;
}
break;
+
case ACPI_HEST_NOTIFY_SCI:
+ case ACPI_HEST_NOTIFY_GSIV:
+ case ACPI_HEST_NOTIFY_GPIO:
mutex_lock(&ghes_list_mutex);
- if (list_empty(&ghes_sci))
- register_acpi_hed_notifier(&ghes_notifier_sci);
- list_add_rcu(&ghes->list, &ghes_sci);
+ if (list_empty(&ghes_hed))
+ register_acpi_hed_notifier(&ghes_notifier_hed);
+ list_add_rcu(&ghes->list, &ghes_hed);
mutex_unlock(&ghes_list_mutex);
break;
+
+ case ACPI_HEST_NOTIFY_SEA:
+ ghes_sea_add(ghes);
+ break;
case ACPI_HEST_NOTIFY_NMI:
ghes_nmi_add(ghes);
break;
@@ -1039,6 +1186,9 @@ static int ghes_probe(struct platform_device *ghes_dev)
}
platform_set_drvdata(ghes_dev, ghes);
+ /* Handle any pending errors right away */
+ ghes_proc(ghes);
+
return 0;
err_edac_unreg:
ghes_edac_unregister(ghes);
@@ -1066,14 +1216,21 @@ static int ghes_remove(struct platform_device *ghes_dev)
case ACPI_HEST_NOTIFY_EXTERNAL:
free_irq(ghes->irq, ghes);
break;
+
case ACPI_HEST_NOTIFY_SCI:
+ case ACPI_HEST_NOTIFY_GSIV:
+ case ACPI_HEST_NOTIFY_GPIO:
mutex_lock(&ghes_list_mutex);
list_del_rcu(&ghes->list);
- if (list_empty(&ghes_sci))
- unregister_acpi_hed_notifier(&ghes_notifier_sci);
+ if (list_empty(&ghes_hed))
+ unregister_acpi_hed_notifier(&ghes_notifier_hed);
mutex_unlock(&ghes_list_mutex);
synchronize_rcu();
break;
+
+ case ACPI_HEST_NOTIFY_SEA:
+ ghes_sea_remove(ghes);
+ break;
case ACPI_HEST_NOTIFY_NMI:
ghes_nmi_remove(ghes);
break;
generated by cgit v1.2.3 (git 2.39.1) at 2024-12-25 00:08:50 +0100