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efi: Decode IA32/X64 MS Check structure 

The IA32/X64 MS Check structure varies from the other Check structures
in the the bit positions of its fields, and it includes an additional
"Error Type" field.

Decode the MS Check structure in a separate function.

Based on UEFI 2.7 Table 257. IA32/X64 MS Check Field Description.

Signed-off-by: Yazen Ghannam <yazen.ghannam@amd.com>
Signed-off-by: Ard Biesheuvel <ard.biesheuvel@linaro.org>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Matt Fleming <matt@codeblueprint.co.uk>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: linux-efi@vger.kernel.org
Link: http://lkml.kernel.org/r/20180504060003.19618-10-ard.biesheuvel@linaro.org
Signed-off-by: Ingo Molnar <mingo@kernel.org>
This commit is contained in:
Yazen Ghannam 2018-05-04 07:59:55 +02:00 committed by Ingo Molnar
parent c6bc4ac0aa
commit a32bc29ed1
1 changed files with 54 additions and 1 deletions
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55
drivers/firmware/efi/cper-x86.c
View File

@ -57,6 +57,20 @@
#define CHECK_BUS_TIME_OUT BIT_ULL(32)
#define CHECK_BUS_ADDR_SPACE(check) (((check) & GENMASK_ULL(34, 33)) >> 33)
#define CHECK_VALID_MS_ERR_TYPE BIT_ULL(0)
#define CHECK_VALID_MS_PCC BIT_ULL(1)
#define CHECK_VALID_MS_UNCORRECTED BIT_ULL(2)
#define CHECK_VALID_MS_PRECISE_IP BIT_ULL(3)
#define CHECK_VALID_MS_RESTARTABLE_IP BIT_ULL(4)
#define CHECK_VALID_MS_OVERFLOW BIT_ULL(5)
#define CHECK_MS_ERR_TYPE(check) (((check) & GENMASK_ULL(18, 16)) >> 16)
#define CHECK_MS_PCC BIT_ULL(19)
#define CHECK_MS_UNCORRECTED BIT_ULL(20)
#define CHECK_MS_PRECISE_IP BIT_ULL(21)
#define CHECK_MS_RESTARTABLE_IP BIT_ULL(22)
#define CHECK_MS_OVERFLOW BIT_ULL(23)
enum err_types {
ERR_TYPE_CACHE = 0,
ERR_TYPE_TLB,
@ -111,17 +125,56 @@ static const char * const ia_check_bus_addr_space_strs[] = {
"Other Transaction",
};
static const char * const ia_check_ms_error_type_strs[] = {
"No Error",
"Unclassified",
"Microcode ROM Parity Error",
"External Error",
"FRC Error",
"Internal Unclassified",
};
static inline void print_bool(char *str, const char *pfx, u64 check, u64 bit)
{
printk("%s%s: %s\n", pfx, str, (check & bit) ? "true" : "false");
}
static void print_err_info_ms(const char *pfx, u16 validation_bits, u64 check)
{
if (validation_bits & CHECK_VALID_MS_ERR_TYPE) {
u8 err_type = CHECK_MS_ERR_TYPE(check);
printk("%sError Type: %u, %s\n", pfx, err_type,
err_type < ARRAY_SIZE(ia_check_ms_error_type_strs) ?
ia_check_ms_error_type_strs[err_type] : "unknown");
}
if (validation_bits & CHECK_VALID_MS_PCC)
print_bool("Processor Context Corrupt", pfx, check, CHECK_MS_PCC);
if (validation_bits & CHECK_VALID_MS_UNCORRECTED)
print_bool("Uncorrected", pfx, check, CHECK_MS_UNCORRECTED);
if (validation_bits & CHECK_VALID_MS_PRECISE_IP)
print_bool("Precise IP", pfx, check, CHECK_MS_PRECISE_IP);
if (validation_bits & CHECK_VALID_MS_RESTARTABLE_IP)
print_bool("Restartable IP", pfx, check, CHECK_MS_RESTARTABLE_IP);
if (validation_bits & CHECK_VALID_MS_OVERFLOW)
print_bool("Overflow", pfx, check, CHECK_MS_OVERFLOW);
}
static void print_err_info(const char *pfx, u8 err_type, u64 check)
{
u16 validation_bits = CHECK_VALID_BITS(check);
/*
* The MS Check structure varies a lot from the others, so use a
* separate function for decoding.
*/
if (err_type == ERR_TYPE_MS)
return;
return print_err_info_ms(pfx, validation_bits, check);
if (validation_bits & CHECK_VALID_TRANS_TYPE) {
u8 trans_type = CHECK_TRANS_TYPE(check);