[PATCH v3 3/8] arm64: apei: add a per-cpu variable to indecate sei is processing
From: Xie XiuQi <hidden>
Date: 2017-03-30 10:34:49
Also in:
kvm, kvmarm, linux-acpi, lkml
Subsystem:
acpi, acpi component architecture (acpica), arm64 port (aarch64 architecture), the rest · Maintainers:
"Rafael J. Wysocki", Saket Dumbre, Catalin Marinas, Will Deacon, Linus Torvalds
Add a per-cpu variable to indicate sei is processing, with which we could use to reserve a separate virtual space address page for sei in next patch Signed-off-by: Xie XiuQi <redacted> --- arch/arm64/kernel/traps.c | 4 ++++ include/acpi/ghes.h | 2 ++ 2 files changed, 6 insertions(+)
diff --git a/arch/arm64/kernel/traps.c b/arch/arm64/kernel/traps.c
index 53710a2..955dc8c 100644
--- a/arch/arm64/kernel/traps.c
+++ b/arch/arm64/kernel/traps.c@@ -615,6 +615,8 @@ const char *esr_get_class_string(u32 esr) return esr_class_str[ESR_ELx_EC(esr)]; } +DEFINE_PER_CPU(int, sei_in_process); + /* * bad_mode handles the impossible case in the exception vector. This is always * fatal.
@@ -632,7 +634,9 @@ asmlinkage void bad_mode(struct pt_regs *regs, int reason, unsigned int esr) * of cper records at a time. There is no risk for one cpu to parse ghes table. */ if (IS_ENABLED(CONFIG_ACPI_APEI_SEI) && ESR_ELx_EC(esr) == ESR_ELx_EC_SERROR) { + this_cpu_inc(sei_in_process); ghes_notify_sei(); + this_cpu_dec(sei_in_process); } die("Oops - bad mode", regs, 0);
diff --git a/include/acpi/ghes.h b/include/acpi/ghes.h
index 10d752e..eed79ea 100644
--- a/include/acpi/ghes.h
+++ b/include/acpi/ghes.h@@ -102,4 +102,6 @@ static inline void *acpi_hest_generic_data_payload(struct acpi_hest_generic_data int ghes_notify_sea(void); int ghes_notify_sei(void); +DECLARE_PER_CPU(int, sei_in_process); + #endif /* GHES_H */
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1.8.3.1