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arch/x86: Skip returning default leaf value as `0` 

`cpu_get_cache_info_leaf()` function is responsible to report leaf
value for CPU that have support for deterministic cache cpuid. As per
available datasheets from AMD and Intel the supported CPUID leafs are
0x8000_001d for AMD and 0x04 for Intel. Hence, this CL skips returning
default leaf value as `0`.

TEST=Verified fixes: e2b5fee3b0 (arch/x86: smbios write 7 table using
deterministic cache functions) hang issue on ASRock E350M1.

Change-Id: Iee33b39298e7821ac5280d998172b58a70c8715b
Signed-off-by: Subrata Banik <subrata.banik@intel.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/57305
Reviewed-by: Paul Menzel <paulepanter@mailbox.org>
Reviewed-by: Tim Wawrzynczak <twawrzynczak@chromium.org>
Reviewed-by: Angel Pons <th3fanbus@gmail.com>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
This commit is contained in:
Subrata Banik 2021-09-01 12:35:15 +05:30 committed by Tim Wawrzynczak
parent 04096b9773
commit 72f1e62bbb
1 changed files with 5 additions and 8 deletions
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13
src/arch/x86/cpu_common.c
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@ -109,14 +109,11 @@ enum cpu_type cpu_check_deterministic_cache_cpuid_supported(void)
static uint32_t cpu_get_cache_info_leaf(void)
{
switch (cpu_check_deterministic_cache_cpuid_supported()) {
case CPUID_TYPE_AMD:
return DETERMINISTIC_CACHE_PARAMETERS_CPUID_AMD;
case CPUID_TYPE_INTEL:
return DETERMINISTIC_CACHE_PARAMETERS_CPUID_IA;
default:
return 0;
}
uint32_t leaf = (cpu_check_deterministic_cache_cpuid_supported() == CPUID_TYPE_AMD) ?
DETERMINISTIC_CACHE_PARAMETERS_CPUID_AMD :
DETERMINISTIC_CACHE_PARAMETERS_CPUID_IA;
return leaf;
}
size_t cpu_get_cache_ways_assoc_info(const struct cpu_cache_info *info)