linux-kernel - [PATCH v2 0/4] x86/sev: Rework SNP Guest Request

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Message-ID: <20250611040842.2667262-1-aik@amd.com>
Date: Wed, 11 Jun 2025 14:08:38 +1000
From: Alexey Kardashevskiy <aik@....com>
To: <x86@...nel.org>
CC: <linux-kernel@...r.kernel.org>, Thomas Gleixner <tglx@...utronix.de>,
	"Ingo Molnar" <mingo@...hat.com>, Borislav Petkov <bp@...en8.de>, Dave Hansen
	<dave.hansen@...ux.intel.com>, "H. Peter Anvin" <hpa@...or.com>, Tom Lendacky
	<thomas.lendacky@....com>, Nikunj A Dadhania <nikunj@....com>, Ard Biesheuvel
	<ardb@...nel.org>, Ashish Kalra <ashish.kalra@....com>, Dionna Glaze
	<dionnaglaze@...gle.com>, Michael Roth <michael.roth@....com>, "Kuppuswamy
 Sathyanarayanan" <sathyanarayanan.kuppuswamy@...ux.intel.com>, "Alexey
 Kardashevskiy" <aik@....com>
Subject: [PATCH v2 0/4] x86/sev: Rework SNP Guest Request

Started as a part of the fix for
ae596615d93d ("virt: sev-guest: Reduce the scope of SNP command mutex")

these are the remainder of followup fixes/improvements as
the SNP Guest Request code evolved enough to make it a bit hard to
follow.

Changes:
v2:
* added RBs
* adjusted grammar
* rebased on top of v6.16-rc1


The previous conversation is here:
https://lore.kernel.org/r/20250505141238.4179623-1-aik@amd.com 

This is based on sha1
19272b37aa4f Linus Torvalds "Linux 6.16-rc1".

Please comment. Thanks.



Alexey Kardashevskiy (4):
  virt: sev-guest: Contain snp_guest_request_ioctl in sev-guest
  x86/sev: Allocate request in TSC_INFO_REQ on stack
  x86/sev: Document requirement for linear mapping of Guest Request
    buffers
  x86/sev: Drop unnecessary parameter in snp_issue_guest_request

 arch/x86/include/asm/sev.h              | 10 ++-
 arch/x86/coco/sev/core.c                | 72 +++++++++-----------
 drivers/virt/coco/sev-guest/sev-guest.c |  9 ++-
 3 files changed, 43 insertions(+), 48 deletions(-)

-- 
2.49.0