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Subject[PATCH v3 3/8] arm64: apei: add a per-cpu variable to indecate sei is processing
Date
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 <xiexiuqi@huawei.com>
---
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 */
--
1.8.3.1
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