aboutsummaryrefslogtreecommitdiff
diff options
context:
space:
mode:
authorYazen Ghannam <yazen.ghannam@amd.com>2018-05-04 07:59:54 +0200
committerIngo Molnar <mingo@kernel.org>2018-05-14 08:57:48 +0200
commitc6bc4ac0aadede7a5c5260bcc315cd2b18c6b471 (patch)
tree3fe965e4246c979701a3879a4d327cf6cf6c7fea
parenta9c1e3e791409e35207277b7873efc756b6fb625 (diff)
download96b-common-c6bc4ac0aadede7a5c5260bcc315cd2b18c6b471.tar.gz
efi: Decode additional IA32/X64 Bus Check fields
The "Participation Type", "Time Out", and "Address Space" fields are unique to the IA32/X64 Bus Check structure. Print these fields. Based on UEFI 2.7 Table 256. IA32/X64 Bus Check Structure 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/20180504060003.19618-9-ard.biesheuvel@linaro.org Signed-off-by: Ingo Molnar <mingo@kernel.org>
-rw-r--r--drivers/firmware/efi/cper-x86.c44
1 files changed, 44 insertions, 0 deletions
diff --git a/drivers/firmware/efi/cper-x86.c b/drivers/firmware/efi/cper-x86.c
index f70c46f7a4db..5e6716564dba 100644
--- a/drivers/firmware/efi/cper-x86.c
+++ b/drivers/firmware/efi/cper-x86.c
@@ -39,6 +39,10 @@
#define CHECK_VALID_RESTARTABLE_IP BIT_ULL(6)
#define CHECK_VALID_OVERFLOW BIT_ULL(7)
+#define CHECK_VALID_BUS_PART_TYPE BIT_ULL(8)
+#define CHECK_VALID_BUS_TIME_OUT BIT_ULL(9)
+#define CHECK_VALID_BUS_ADDR_SPACE BIT_ULL(10)
+
#define CHECK_VALID_BITS(check) (((check) & GENMASK_ULL(15, 0)))
#define CHECK_TRANS_TYPE(check) (((check) & GENMASK_ULL(17, 16)) >> 16)
#define CHECK_OPERATION(check) (((check) & GENMASK_ULL(21, 18)) >> 18)
@@ -49,6 +53,10 @@
#define CHECK_RESTARTABLE_IP BIT_ULL(28)
#define CHECK_OVERFLOW BIT_ULL(29)
+#define CHECK_BUS_PART_TYPE(check) (((check) & GENMASK_ULL(31, 30)) >> 30)
+#define CHECK_BUS_TIME_OUT BIT_ULL(32)
+#define CHECK_BUS_ADDR_SPACE(check) (((check) & GENMASK_ULL(34, 33)) >> 33)
+
enum err_types {
ERR_TYPE_CACHE = 0,
ERR_TYPE_TLB,
@@ -89,6 +97,20 @@ static const char * const ia_check_op_strs[] = {
"snoop",
};
+static const char * const ia_check_bus_part_type_strs[] = {
+ "Local Processor originated request",
+ "Local Processor responded to request",
+ "Local Processor observed",
+ "Generic",
+};
+
+static const char * const ia_check_bus_addr_space_strs[] = {
+ "Memory Access",
+ "Reserved",
+ "I/O",
+ "Other Transaction",
+};
+
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");
@@ -139,6 +161,28 @@ static void print_err_info(const char *pfx, u8 err_type, u64 check)
if (validation_bits & CHECK_VALID_OVERFLOW)
print_bool("Overflow", pfx, check, CHECK_OVERFLOW);
+
+ if (err_type != ERR_TYPE_BUS)
+ return;
+
+ if (validation_bits & CHECK_VALID_BUS_PART_TYPE) {
+ u8 part_type = CHECK_BUS_PART_TYPE(check);
+
+ printk("%sParticipation Type: %u, %s\n", pfx, part_type,
+ part_type < ARRAY_SIZE(ia_check_bus_part_type_strs) ?
+ ia_check_bus_part_type_strs[part_type] : "unknown");
+ }
+
+ if (validation_bits & CHECK_VALID_BUS_TIME_OUT)
+ print_bool("Time Out", pfx, check, CHECK_BUS_TIME_OUT);
+
+ if (validation_bits & CHECK_VALID_BUS_ADDR_SPACE) {
+ u8 addr_space = CHECK_BUS_ADDR_SPACE(check);
+
+ printk("%sAddress Space: %u, %s\n", pfx, addr_space,
+ addr_space < ARRAY_SIZE(ia_check_bus_addr_space_strs) ?
+ ia_check_bus_addr_space_strs[addr_space] : "unknown");
+ }
}
void cper_print_proc_ia(const char *pfx, const struct cper_sec_proc_ia *proc)