Re: [PATCH v15 06/13] x86/sev: Prevent GUEST_TSC_FREQ MSR interception for Secure TSC enabled guests

[Borislav Petkov]

On Thu, Dec 12, 2024 at 10:23:01AM +0530, Nikunj A. Dadhania wrote:
> @@ -1477,19 +1480,13 @@ static enum es_result vc_handle_msr(struct ghcb *ghcb, struct es_em_ctxt *ctxt)
>  	case MSR_SVSM_CAA:
>  		return __vc_handle_msr_caa(regs, write);
>  	case MSR_IA32_TSC:
> -		return __vc_handle_msr_tsc(regs, write);
> +	case MSR_AMD64_GUEST_TSC_FREQ:
> +		if (sev_status & MSR_AMD64_SNP_SECURE_TSC)
> +			return __vc_handle_msr_tsc(regs, write);

Now push that conditional inside the function too.

-- 
Regards/Gruss,
    Boris.

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