| From: |
| Ashish Kalra <Ashish.Kalra-AT-amd.com> |
| To: |
| <tglx-AT-linutronix.de>, <mingo-AT-redhat.com>, <bp-AT-alien8.de>, <dave.hansen-AT-linux.intel.com>, <x86-AT-kernel.org> |
| Subject: |
| [PATCH v3 0/4] x86/snp: Add kexec support |
| Date: |
| Thu, 04 Apr 2024 23:10:46 +0000 |
| Message-ID: |
| <cover.1712270975.git.ashish.kalra@amd.com> |
| Cc: |
| <rafael-AT-kernel.org>, <peterz-AT-infradead.org>, <adrian.hunter-AT-intel.com>, <sathyanarayanan.kuppuswamy-AT-linux.intel.com>, <jun.nakajima-AT-intel.com>, <rick.p.edgecombe-AT-intel.com>, <thomas.lendacky-AT-amd.com>, <michael.roth-AT-amd.com>, <seanjc-AT-google.com>, <kai.huang-AT-intel.com>, <bhe-AT-redhat.com>, <kirill.shutemov-AT-linux.intel.com>, <bdas-AT-redhat.com>, <vkuznets-AT-redhat.com>, <dionnaglaze-AT-google.com>, <anisinha-AT-redhat.com>, <jroedel-AT-suse.de>, <ardb-AT-kernel.org>, <kexec-AT-lists.infradead.org>, <linux-coco-AT-lists.linux.dev>, <linux-kernel-AT-vger.kernel.org> |
| Archive-link: |
| Article |
From: Ashish Kalra <ashish.kalra@amd.com>
The patchset adds bits and pieces to get kexec (and crashkernel) work on
SNP guest.
v3:
- Rebased;
- moved Keep page tables that maps E820_TYPE_ACPI patch to Kirill's tdx
guest kexec patch series.
- checking the md attribute instead of checking the efi_setup for
detecting if running under kexec kernel.
- added new sev_es_enabled() function.
- skip video memory access in decompressor for SEV-ES/SNP systems to
prevent guest termination as boot stage2 #VC handler does not handle
MMIO.
v2:
- address zeroing of unaccepted memory table mappings at all page table levels
adding phys_pte_init(), phys_pud_init() and phys_p4d_init().
- include skip efi_arch_mem_reserve() in case of kexec as part of this
patch set.
- rename last_address_shd_kexec to a more appropriate
kexec_last_address_to_make_private.
- remove duplicate code shared with TDX and use common interfaces
defined for SNP and TDX for kexec/kdump.
- remove set_pte_enc() dependency on pg_level_to_pfn() and make the
function simpler.
- rename unshare_pte() to make_pte_private().
- clarify and make the comment for using kexec_last_address_to_make_private
more understandable.
- general cleanup.
Ashish Kalra (4):
efi/x86: skip efi_arch_mem_reserve() in case of kexec.
x86/sev: add sev_es_enabled() function.
x86/boot/compressed: Skip Video Memory access in Decompressor for
SEV-ES/SNP.
x86/snp: Convert shared memory back to private on kexec
arch/x86/boot/compressed/misc.c | 6 +-
arch/x86/boot/compressed/misc.h | 1 +
arch/x86/boot/compressed/sev.c | 5 +
arch/x86/boot/compressed/sev.h | 2 +
arch/x86/include/asm/probe_roms.h | 1 +
arch/x86/include/asm/sev.h | 4 +
arch/x86/kernel/probe_roms.c | 16 +++
arch/x86/kernel/sev.c | 169 ++++++++++++++++++++++++++++++
arch/x86/mm/mem_encrypt_amd.c | 3 +
arch/x86/platform/efi/quirks.c | 23 +++-
10 files changed, 225 insertions(+), 5 deletions(-)
--
2.34.1
