Re: [PATCH v2 06/35] x86/bugs: Restructure mmio mitigation

[Pawan Gupta]

On Tue, Nov 05, 2024 at 03:54:26PM -0600, David Kaplan wrote:
> +static void __init mmio_update_mitigation(void)
> +{
> +	if (!boot_cpu_has_bug(X86_BUG_MMIO_STALE_DATA))
> +		return;
> +
> +	if (mitigate_any_verw())
> +		mmio_mitigation = MMIO_MITIGATION_VERW;

Same as TAA, UCODE_NEEDED can't be set irrespective of microcode.

> +
> +	pr_info("%s\n", mmio_strings[mmio_mitigation]);

This should be in the 'else' part of below condition, otherwise they can
print conflicting mitigation status.

> +	if (boot_cpu_has_bug(X86_BUG_MMIO_UNKNOWN))
> +		pr_info("Unknown: No mitigations\n");
> +}