linux-kernel - Re: [PATCH v2 2/2] x86/sev: let sev_es_efi_map

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Message-ID: <jqwz74wv6sbqtabmmhxmsmgojojrj53oxsqyhbznm2iq7u227p@qpudglm5enr2>
Date: Thu, 26 Jun 2025 09:43:15 +0200
From: Gerd Hoffmann <kraxel@...hat.com>
To: Borislav Petkov <bp@...en8.de>
Cc: linux-coco@...ts.linux.dev, kvm@...r.kernel.org, 
	Thomas Gleixner <tglx@...utronix.de>, Ingo Molnar <mingo@...hat.com>, 
	Dave Hansen <dave.hansen@...ux.intel.com>, 
	"maintainer:X86 ARCHITECTURE (32-BIT AND 64-BIT)" <x86@...nel.org>, "H. Peter Anvin" <hpa@...or.com>, 
	Ard Biesheuvel <ardb@...nel.org>, 
	"open list:X86 ARCHITECTURE (32-BIT AND 64-BIT)" <linux-kernel@...r.kernel.org>, 
	"open list:EXTENSIBLE FIRMWARE INTERFACE (EFI)" <linux-efi@...r.kernel.org>
Subject: Re: [PATCH v2 2/2] x86/sev: let sev_es_efi_map_ghcbs map the caa
 pages too

On Wed, Jun 25, 2025 at 04:29:36PM +0200, Borislav Petkov wrote:
> On Wed, Jun 25, 2025 at 03:21:47PM +0200, Gerd Hoffmann wrote:
> > This is inside a loop, so returning in case the caa address is NULL will
> > skip ghcb setup for all but the first CPU.
> 
> Then you should not piggyback on this loop but map the CAs in a separate step,
> only when a SVSM is running.

v3 sent.

take care,
  Gerd