From: Ashish Kalra <ashish.ka...@amd.com> The patchset adds bits and pieces to get kexec (and crashkernel) work on SNP guest.
v4: - Rebased to current tip/master. - Reviewed-bys from Sathya. - Remove snp_kexec_unprep_rom_memory() as it is not needed any more as SEV-SNP code is not validating the ROM range in probe_roms() anymore. - Fix kernel test robot build error/warnings. 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/sev.h | 4 + arch/x86/kernel/sev.c | 161 ++++++++++++++++++++++++++++++++ arch/x86/mm/mem_encrypt_amd.c | 3 + arch/x86/platform/efi/quirks.c | 20 +++- 8 files changed, 198 insertions(+), 4 deletions(-) -- 2.34.1 _______________________________________________ kexec mailing list kexec@lists.infradead.org http://lists.infradead.org/mailman/listinfo/kexec