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Date: Sat, 24 Feb 2018 16:42:49 +0000
From: Ard Biesheuvel <ard.biesheuvel@...aro.org>
To: Yazen Ghannam <Yazen.Ghannam@....com>
Cc: linux-efi@...r.kernel.org,
Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
Borislav Petkov <bp@...e.de>,
"the arch/x86 maintainers" <x86@...nel.org>
Subject: Re: [PATCH 5/8] efi: Decode IA32/X64 Cache, TLB, and Bus Check structures
On 23 February 2018 at 20:03, Yazen Ghannam <Yazen.Ghannam@....com> wrote:
> From: Yazen Ghannam <yazen.ghannam@....com>
>
> Print the common fields of the Cache, TLB, and Bus check structures.The
> fields of these three check types are the same except for a few more
> fields in the Bus check structure. The remaining Bus check structure
> fields will be decoded in a following patch.
>
> Based on UEFI 2.7,
> Table 257. IA32/X64 Cache Check Structure
> Table 258. IA32/X64 TLB Check Structure
> Table 259. IA32/X64 Bus Check Structure
>
> Cc: <stable@...r.kernel.org> # 4.16.x
> Signed-off-by: Yazen Ghannam <yazen.ghannam@....com>
> ---
> drivers/firmware/efi/cper-x86.c | 101 +++++++++++++++++++++++++++++++++++++++-
> 1 file changed, 100 insertions(+), 1 deletion(-)
>
> diff --git a/drivers/firmware/efi/cper-x86.c b/drivers/firmware/efi/cper-x86.c
> index 3b86223bdb67..75f664043076 100644
> --- a/drivers/firmware/efi/cper-x86.c
> +++ b/drivers/firmware/efi/cper-x86.c
> @@ -33,6 +33,25 @@
> #define INFO_VALID_RESPONDER_ID BIT_ULL(3)
> #define INFO_VALID_IP BIT_ULL(4)
>
> +#define CHECK_VALID_TRANS_TYPE BIT_ULL(0)
> +#define CHECK_VALID_OPERATION BIT_ULL(1)
> +#define CHECK_VALID_LEVEL BIT_ULL(2)
> +#define CHECK_VALID_PCC BIT_ULL(3)
> +#define CHECK_VALID_UNCORRECTED BIT_ULL(4)
> +#define CHECK_VALID_PRECISE_IP BIT_ULL(5)
> +#define CHECK_VALID_RESTARTABLE_IP BIT_ULL(6)
> +#define CHECK_VALID_OVERFLOW BIT_ULL(7)
> +
> +#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)
> +#define CHECK_LEVEL(check) ((check & GENMASK_ULL(24, 22)) >> 22)
Parens around 'check' please
> +#define CHECK_PCC BIT_ULL(25)
> +#define CHECK_UNCORRECTED BIT_ULL(26)
> +#define CHECK_PRECISE_IP BIT_ULL(27)
> +#define CHECK_RESTARTABLE_IP BIT_ULL(28)
> +#define CHECK_OVERFLOW BIT_ULL(29)
> +
> enum err_types {
> ERR_TYPE_CACHE = 0,
> ERR_TYPE_TLB,
> @@ -55,11 +74,83 @@ static enum err_types cper_get_err_type(const guid_t *err_type)
> return N_ERR_TYPES;
> }
>
> +static const char * const ia_check_trans_type_strs[] = {
> + "Instruction",
> + "Data Access",
> + "Generic",
> +};
> +
> +static const char * const ia_check_op_strs[] = {
> + "generic error",
> + "generic read",
> + "generic write",
> + "data read",
> + "data write",
> + "instruction fetch",
> + "prefetch",
> + "eviction",
> + "snoop",
> +};
> +
> +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(const char *pfx, enum err_types err_type, u64 check)
u8 for err_type please
> +{
> + u16 validation_bits = CHECK_VALID_BITS(check);
> +
> + printk("%sValidation Bits: 0x%04x\n", pfx, validation_bits);
> +
> + if (err_type == ERR_TYPE_MS)
> + return;
> +
> + if (validation_bits & CHECK_VALID_TRANS_TYPE) {
> + u8 trans_type = CHECK_TRANS_TYPE(check);
> +
> + printk("%sTransaction Type: %u, %s\n", pfx, trans_type,
> + trans_type < ARRAY_SIZE(ia_check_trans_type_strs) ?
> + ia_check_trans_type_strs[trans_type] : "unknown");
> + }
> +
> + if (validation_bits & CHECK_VALID_OPERATION) {
> + u8 op = CHECK_OPERATION(check);
> +
> + /*
> + * CACHE has more operation types than TLB or BUS, though the
> + * name and the order are the same.
> + */
> + u8 max_ops = (err_type == ERR_TYPE_CACHE) ? 9 : 7;
> +
> + printk("%sOperation: %u, %s\n", pfx, op,
> + op < max_ops ? ia_check_op_strs[op] : "unknown");
> + }
> +
> + if (validation_bits & CHECK_VALID_LEVEL)
> + printk("%sLevel: %llu\n", pfx, CHECK_LEVEL(check));
> +
> + if (validation_bits & CHECK_VALID_PCC)
> + print_bool("Processor Context Corrupt", pfx, check, CHECK_PCC);
> +
> + if (validation_bits & CHECK_VALID_UNCORRECTED)
> + print_bool("Uncorrected", pfx, check, CHECK_UNCORRECTED);
> +
> + if (validation_bits & CHECK_VALID_PRECISE_IP)
> + print_bool("Precise IP", pfx, check, CHECK_PRECISE_IP);
> +
> + if (validation_bits & CHECK_VALID_RESTARTABLE_IP)
> + print_bool("Restartable IP", pfx, check, CHECK_RESTARTABLE_IP);
> +
> + if (validation_bits & CHECK_VALID_OVERFLOW)
> + print_bool("Overflow", pfx, check, CHECK_OVERFLOW);
> +}
> +
> void cper_print_proc_ia(const char *pfx, const struct cper_sec_proc_ia *proc)
> {
> int i;
> struct cper_ia_err_info *err_info;
> - char newpfx[64];
> + char newpfx[64], infopfx[64];
> enum err_types err_type;
>
> printk("%sValidation Bits: 0x%016llx\n", pfx, proc->validation_bits);
> @@ -93,6 +184,14 @@ void cper_print_proc_ia(const char *pfx, const struct cper_sec_proc_ia *proc)
> if (err_info->validation_bits & INFO_VALID_CHECK_INFO) {
> printk("%sCheck Information: 0x%016llx\n", newpfx,
> err_info->check_info);
> +
> + if (err_type < N_ERR_TYPES) {
> + snprintf(infopfx, sizeof(infopfx), "%s%s",
> + newpfx, INDENT_SP);
> +
> + print_err_info(infopfx, err_type,
> + err_info->check_info);
> + }
> }
>
> if (err_info->validation_bits & INFO_VALID_TARGET_ID) {
> --
> 2.14.1
>
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