linux-kernel - [PATCH 0/2] x86/snp: Add kexec support

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Date: Tue, 20 Feb 2024 01:18:10 +0000
From: Ashish Kalra <Ashish.Kalra@....com>
To: <tglx@...utronix.de>, <mingo@...hat.com>, <bp@...en8.de>,
	<dave.hansen@...ux.intel.com>, <luto@...nel.org>, <x86@...nel.org>
CC: <ardb@...nel.org>, <hpa@...or.com>, <linux-efi@...r.kernel.org>,
	<linux-kernel@...r.kernel.org>, <rafael@...nel.org>, <peterz@...radead.org>,
	<adrian.hunter@...el.com>, <sathyanarayanan.kuppuswamy@...ux.intel.com>,
	<elena.reshetova@...el.com>, <jun.nakajima@...el.com>,
	<rick.p.edgecombe@...el.com>, <thomas.lendacky@....com>, <seanjc@...gle.com>,
	<kai.huang@...el.com>, <bhe@...hat.com>, <kexec@...ts.infradead.org>,
	<linux-coco@...ts.linux.dev>, <kirill.shutemov@...ux.intel.com>,
	<anisinha@...hat.com>, <michael.roth@....com>, <bdas@...hat.com>,
	<vkuznets@...hat.com>, <dionnaglaze@...gle.com>, <jroedel@...e.de>,
	<ashwin.kamat@...adcom.com>
Subject: [PATCH 0/2] x86/snp: Add kexec support

From: Ashish Kalra <ashish.kalra@....com>

The patchset adds bits and pieces to get kexec (and crashkernel) work on
SNP guest.

This patchset requires [1] for chained guest kexec to work correctly.

[1]: https://lore.kernel.org/lkml/20240219225451.787816-1-Ashish.Kalra@amd.com/

Ashish Kalra (2):
  x86/mm: Do not zap PMD entry mapping unaccepted memory table during
    kdump.
  x86/snp: Convert shared memory back to private on kexec

 arch/x86/include/asm/probe_roms.h |   1 +
 arch/x86/include/asm/sev.h        |   8 ++
 arch/x86/kernel/probe_roms.c      |  16 +++
 arch/x86/kernel/sev.c             | 211 ++++++++++++++++++++++++++++++
 arch/x86/mm/init_64.c             |   4 +-
 arch/x86/mm/mem_encrypt_amd.c     |  18 ++-
 6 files changed, 256 insertions(+), 2 deletions(-)

-- 
2.34.1