Re: [PATCH v3 74/75] x86/sev-es: Handle NMI State

Borislav Petkov
2020-06-03T09:59:23Z

On Tue, Apr 28, 2020 at 05:17:24PM +0200, Joerg Roedel wrote:
> diff --git a/arch/x86/kernel/nmi.c b/arch/x86/kernel/nmi.c
> index 27d1016ec840..8898002e5600 100644
> --- a/arch/x86/kernel/nmi.c
> +++ b/arch/x86/kernel/nmi.c
> @@ -511,6 +511,13 @@ NOKPROBE_SYMBOL(is_debug_stack);
> dotraplinkage notrace void
> do_nmi(struct pt_regs *regs, long error_code)
> {
> + /*
> + * Re-enable NMIs right here when running as an SEV-ES guest. This might
> + * cause nested NMIs, but those can be handled safely.
> + */
> + if (sev_es_active())
> + sev_es_nmi_complete();

Pls move the comment and the sev_es_active() check into
the sev_es_nmi_complete() function.

--
Regards/Gruss,
Boris.