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x86/cpu: Introduce new microcode matching helper

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The 'x86_cpu_id' and 'x86_cpu_desc' structures are very similar and
need to be consolidated.  There is a microcode version matching
function for 'x86_cpu_desc' but not 'x86_cpu_id'.

Create one for 'x86_cpu_id'.

This essentially just leverages the x86_cpu_id->driver_data field
to replace the less generic x86_cpu_desc->x86_microcode_rev field.

Signed-off-by: Dave Hansen <dave.hansen@linux.intel.com>
Link: https://lore.kernel.org/all/20241213185128.8F24EEFC%40davehans-spike.ostc.intel.com
This commit is contained in:
Dave Hansen 2024-12-13 10:51:28 -08:00
parent 4bf610499c
commit b8e10c86e6
2 changed files with 12 additions and 0 deletions
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1
arch/x86/include/asm/cpu_device_id.h
View File

@ -278,5 +278,6 @@ struct x86_cpu_desc {
extern const struct x86_cpu_id *x86_match_cpu(const struct x86_cpu_id *match);
extern bool x86_cpu_has_min_microcode_rev(const struct x86_cpu_desc *table);
extern bool x86_match_min_microcode_rev(const struct x86_cpu_id *table);
#endif /* _ASM_X86_CPU_DEVICE_ID */

11
arch/x86/kernel/cpu/match.c
View File

@ -86,3 +86,14 @@ bool x86_cpu_has_min_microcode_rev(const struct x86_cpu_desc *table)
return true;
}
EXPORT_SYMBOL_GPL(x86_cpu_has_min_microcode_rev);
bool x86_match_min_microcode_rev(const struct x86_cpu_id *table)
{
const struct x86_cpu_id *res = x86_match_cpu(table);
if (!res || res->driver_data > boot_cpu_data.microcode)
return false;
return true;
}
EXPORT_SYMBOL_GPL(x86_match_min_microcode_rev);