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
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)