Re: [PATCH v7 1/2] x86/sev: Make sure IRQs are disabled while GHCB is active

On Fri, Jun 18, 2021 at 01:54:08PM +0200, Joerg Roedel wrote:

From: Joerg Roedel <redacted>

The #VC handler only cares about IRQs being disabled while the GHCB is
active, as it must not be interrupted by something which could cause
another #VC while it holds the GHCB (NMI is the exception for which the
backup GHCB exits).

Make sure nothing interrupts the code path while the GHCB is active by
disabling IRQs in sev_es_get_ghcb() and restoring the previous irq state
in sev_es_put_ghcb().

Note for committer: update those function names.

-- 
Regards/Gruss,
    Boris.

https://people.kernel.org/tglx/notes-about-netiquette
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