Re: [PATCH v6 33/90] x86/cpu: Use parsed CPUID(0x2)

On 2026-03-27 at 03:15:47 +0100, Ahmed S. Darwish wrote:
>At the Intel cacheinfo code, use parsed CPUID(0x2) access instead of a
>direct CPUID query.

I'm pretty sure this line refers to patch 34/90? There you modify
intel_cacheinfo_0x2() while this patch doesn't relate to cacheinfo in any way.

Perhaps the line above should move to 34/90 and this patch should say "At the
Intel tlb code..." instead?

>
>Remove the "maximum standard CPUID level >= 0x2" check as the parsed
>CPUID API output NULL check is equivalent.
>
>Signed-off-by: Ahmed S. Darwish <[email protected]>
>---
> arch/x86/kernel/cpu/intel.c | 10 +++++-----
> 1 file changed, 5 insertions(+), 5 deletions(-)
>
>diff --git a/arch/x86/kernel/cpu/intel.c b/arch/x86/kernel/cpu/intel.c
>index 08869fecdf30..cad66ca14ca4 100644
>--- a/arch/x86/kernel/cpu/intel.c
>+++ b/arch/x86/kernel/cpu/intel.c
>@@ -722,14 +722,14 @@ static void intel_tlb_lookup(const struct leaf_0x2_table *desc)
> static void intel_detect_tlb(struct cpuinfo_x86 *c)
> {
> 	const struct leaf_0x2_table *desc;
>-	union leaf_0x2_regs regs;
>-	u8 *ptr;
>+	const struct cpuid_regs *regs;
>+	const u8 *ptr;
> 
>-	if (c->cpuid_level < 2)
>+	regs = cpuid_leaf_raw(c, 0x2);
>+	if (!regs)
> 		return;
> 
>-	cpuid_leaf_0x2(&regs);
>-	for_each_cpuid_0x2_desc(regs, ptr, desc)
>+	for_each_parsed_cpuid_0x2_desc(regs, ptr, desc)
> 		intel_tlb_lookup(desc);
> }
> 
>-- 
>2.53.0
>

-- 
Kind regards
Maciej Wieczór-Retman