Re: [PATCH v3 2/2] x86/sev-es: Include XSS value in GHCB CPUID request

[Dave Hansen]

On 9/24/25 13:08, John Allen wrote:
> +	if (has_cpuflag(X86_FEATURE_SHSTK) && regs->ax == 0xd && regs->cx == 1) {
> +		struct msr m;
> +
> +		raw_rdmsr(MSR_IA32_XSS, &m);
> +		ghcb_set_xss(ghcb, m.q);
> +	}

Is there a reason this is open-coding CPUID_LEAF_XSTATE?