@@ -32,6 +32,7 @@
#include <asm/cpu_ops.h>
#include <asm/daifflags.h>
#include <asm/smp_plat.h>
+#include <asm/traps.h>
int acpi_noirq = 1; /* skip ACPI IRQ initialization */
int acpi_disabled = 1;
@@ -407,6 +408,11 @@ int apei_claim_sea(struct pt_regs *regs)
return err;
}
+void arch_apei_do_unhandled_sea(void)
+{
+ arm64_force_sig_mceerr(BUS_MCEERR_AR, 0, 0, "Unhandled processor error");
+}
+
void arch_reserve_mem_area(acpi_physical_address addr, size_t size)
{
memblock_mark_nomap(addr, size);
@@ -773,6 +773,10 @@ void __weak arch_apei_report_mem_error(int sev,
}
EXPORT_SYMBOL_GPL(arch_apei_report_mem_error);
+void __weak arch_apei_do_unhandled_sea(void)
+{
+}
+
int apei_osc_setup(void)
{
static u8 whea_uuid_str[] = "ed855e0c-6c90-47bf-a62a-26de0fc5ad5c";
@@ -48,6 +48,7 @@
#include <asm/fixmap.h>
#include <asm/tlbflush.h>
#include <ras/ras_event.h>
+#include <asm/traps.h>
#include "apei-internal.h"
@@ -483,11 +484,12 @@ static bool ghes_handle_memory_failure(struct acpi_hest_generic_data *gdata,
return false;
}
-static bool ghes_handle_arm_hw_error(struct acpi_hest_generic_data *gdata, int sev)
+static bool ghes_handle_arm_hw_error(struct acpi_hest_generic_data *gdata,
+ int sev, int type)
{
struct cper_sec_proc_arm *err = acpi_hest_get_payload(gdata);
bool queued = false;
- int sec_sev, i;
+ int sec_sev, i, unhandled_err_count = 0;
char *p;
log_arm_hw_error(err);
@@ -521,9 +523,14 @@ static bool ghes_handle_arm_hw_error(struct acpi_hest_generic_data *gdata, int s
pr_warn_ratelimited(FW_WARN GHES_PFX
"Unhandled processor error type: %s\n",
error_type);
+ unhandled_err_count++;
+
p += err_info->length;
}
+ if (unhandled_err_count && type == ACPI_HEST_NOTIFY_SEA)
+ arch_apei_do_unhandled_sea();
+
return queued;
}
@@ -631,6 +638,7 @@ static bool ghes_do_proc(struct ghes *ghes,
const guid_t *fru_id = &guid_null;
char *fru_text = "";
bool queued = false;
+ int type = ghes->generic->notify.type;
sev = ghes_severity(estatus->error_severity);
apei_estatus_for_each_section(estatus, gdata) {
@@ -654,7 +662,7 @@ static bool ghes_do_proc(struct ghes *ghes,
ghes_handle_aer(gdata);
}
else if (guid_equal(sec_type, &CPER_SEC_PROC_ARM)) {
- queued = ghes_handle_arm_hw_error(gdata, sev);
+ queued = ghes_handle_arm_hw_error(gdata, sev, type);
} else {
void *err = acpi_hest_get_payload(gdata);
@@ -52,6 +52,7 @@ int erst_clear(u64 record_id);
int arch_apei_enable_cmcff(struct acpi_hest_header *hest_hdr, void *data);
void arch_apei_report_mem_error(int sev, struct cper_sec_mem_err *mem_err);
+void arch_apei_do_unhandled_sea(void);
#endif
#endif
According to the RAS documentation, if we cannot determine the impact of the error based on the details of the error when an SEA occurs, the process cannot safely continue to run. Therefore, for unhandled error, we should signal the system and terminate the process immediately. 2.2 Generating error exceptions: "An error exception is generated when a detected error is signaled to the PE as an in-band error response to an architecturally-executed memory access or cache maintenance operation. This includes any explicit data access, instruction fetch, translation table walk, or hardware update to the translation tables made by an architecturally-executed instruction." [1] 2.3 Taking error exceptions: Software is only able to successfully recover execution and make progress from a restart address for the exception by executing an Exception Return instruction to branch to the instruction at this restart address if all of the following are true: [2] - The error has not been silently propagated by the PE. - At the point when the Exception Return instruction is executed, the PE state and memory system state are consistent with the PE having executed all of the instructions up to but not including the instruction at the restart address, and none afterwards. That is, at least one of the following restart conditions is true: - The error has been not architecturally consumed by the PE andinfected the PE state. - Executing the instruction at the restart address will not consume the error and will correct any corrupt state by overwriting it with the correct value or values After commit 8fcc4ae6faf8 ("arm64: acpi: Make apei_claim_sea() synchronise with APEI's irq work"), we deferred de SEA process to irq_work. For example, an memory reading error without valid pa, the process isn't been terminated. It is not safe. In this patch, a SIGBUS is force signaled to fix this case. Note: RAS documentation: https://developer.arm.com/documentation/ddi0587/latest Fixes: 8fcc4ae6faf8 ("arm64: acpi: Make apei_claim_sea() synchronise with APEI's irq work") Signed-off-by: Xie XiuQi <xiexiuqi@huawei.com> --- arch/arm64/kernel/acpi.c | 6 ++++++ drivers/acpi/apei/apei-base.c | 4 ++++ drivers/acpi/apei/ghes.c | 14 +++++++++++--- include/acpi/apei.h | 1 + 4 files changed, 22 insertions(+), 3 deletions(-)