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tools/x86/kcpuid: Dump the correct CPUID function in error

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The tool uses the 16 least significant bits of the CPUID leaf as an
index into its array of CPUID function field descriptions.

However, when that index is non-existent, it uses the same, truncated
index to report it, which is wrong:

$ kcpuid -l 0x80000034
  ERR: invalid input index (0x34)

Use the original index number in the error message.

Signed-off-by: Borislav Petkov (AMD) <bp@alien8.de>
Link: https://lore.kernel.org/r/20230426094107.27348-1-bp@alien8.de
This commit is contained in:
Borislav Petkov (AMD) 2023-04-26 11:41:07 +02:00
parent ac9a78681b
commit 0150d1bfbe
1 changed files with 4 additions and 3 deletions
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7
tools/arch/x86/kcpuid/kcpuid.c
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@ -517,15 +517,16 @@ static void show_range(struct cpuid_range *range)
static inline struct cpuid_func *index_to_func(u32 index)
{
struct cpuid_range *range;
u32 func_idx;
range = (index & 0x80000000) ? leafs_ext : leafs_basic;
index &= 0x7FFFFFFF;
func_idx = index & 0xffff;
if (((index & 0xFFFF) + 1) > (u32)range->nr) {
if ((func_idx + 1) > (u32)range->nr) {
printf("ERR: invalid input index (0x%x)\n", index);
return NULL;
}
return &range->funcs[index];
return &range->funcs[func_idx];
}
static void show_info(void)