Tom Lendacky 208bb686e7 x86/ioremap: Map EFI-reserved memory as encrypted for SEV ... commit 8d651ee9c71bb12fc0c8eb2786b66cbe5aa3e43b upstream. Some drivers require memory that is marked as EFI boot services data. In order for this memory to not be re-used by the kernel after ExitBootServices(), efi_mem_reserve() is used to preserve it by inserting a new EFI memory descriptor and marking it with the EFI_MEMORY_RUNTIME attribute. Under SEV, memory marked with the EFI_MEMORY_RUNTIME attribute needs to be mapped encrypted by Linux, otherwise the kernel might crash at boot like below: EFI Variables Facility v0.08 2004-May-17 general protection fault, probably for non-canonical address 0x3597688770a868b2: 0000 [#1] SMP NOPTI CPU: 13 PID: 1 Comm: swapper/0 Not tainted 5.12.4-2-default #1 openSUSE Tumbleweed Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 0.0.0 02/06/2015 RIP: 0010:efi_mokvar_entry_next [...] Call Trace: efi_mokvar_sysfs_init ? efi_mokvar_table_init do_one_initcall ? __kmalloc kernel_init_freeable ? rest_init kernel_init ret_from_fork Expand the __ioremap_check_other() function to additionally check for this other type of boot data reserved at runtime and indicate that it should be mapped encrypted for an SEV guest. [ bp: Massage commit message. ] Fixes: 58c909022a ("efi: Support for MOK variable config table") Reported-by: Joerg Roedel <jroedel@suse.de> Signed-off-by: Tom Lendacky <thomas.lendacky@amd.com> Signed-off-by: Joerg Roedel <jroedel@suse.de> Signed-off-by: Borislav Petkov <bp@suse.de> Tested-by: Joerg Roedel <jroedel@suse.de> Cc: <stable@vger.kernel.org> # 5.10+ Link: https://lkml.kernel.org/r/20210608095439.12668-2-joro@8bytes.org Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>		2021-06-23 14:42:52 +02:00
..
pat	x86: fix seq_file iteration for pat/memtype.c	2021-03-04 11:38:38 +01:00
amdtopology.c
cpu_entry_area.c
debug_pagetables.c
dump_pagetables.c
extable.c
fault.c	x86/fault: Fix AMD erratum #91 errata fixup for user code	2021-03-04 11:38:34 +01:00
highmem_32.c
hugetlbpage.c
ident_map.c	x86/mm/ident_map: Check for errors from ident_pud_init()	2020-12-30 11:52:58 +01:00
init_32.c
init_64.c
init.c
iomap_32.c
ioremap.c	x86/ioremap: Map EFI-reserved memory as encrypted for SEV	2021-06-23 14:42:52 +02:00
kasan_init_64.c
kaslr.c
kmmio.c
maccess.c
Makefile
mem_encrypt_boot.S
mem_encrypt_identity.c	x86/sev: Check SME/SEV support in CPUID first	2021-06-10 13:39:27 +02:00
mem_encrypt.c	x86/mem_encrypt: Correct physical address calculation in __set_clr_pte_enc()	2021-03-30 14:32:07 +02:00
mm_internal.h
mmap.c
mmio-mod.c
numa_32.c
numa_64.c
numa_emulation.c
numa_internal.h
numa.c	x86/mm: Avoid truncating memblocks for SGX memory	2021-06-23 14:42:52 +02:00
pf_in.c
pf_in.h
pgtable_32.c
pgtable.c	x86/mm: Fix leak of pmd ptlock	2021-01-12 20:18:22 +01:00
physaddr.c
physaddr.h
pkeys.c
pti.c
setup_nx.c
srat.c
testmmiotrace.c
tlb.c	x86/membarrier: Get rid of a dubious optimization	2020-12-09 09:37:42 +01:00