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07344b15a9
linux/arch/x86/boot/compressed
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Tom Lendacky 07344b15a9 x86/boot: Fix SEV boot failure from change to __PHYSICAL_MASK_SHIFT 
In arch/x86/boot/compressed/kaslr_64.c, CONFIG_AMD_MEM_ENCRYPT support was
initially #undef'd to support SME with minimal effort.  When support for
SEV was added, the #undef remained and some minimal support for setting the
encryption bit was added for building identity mapped pagetable entries.

Commit b83ce5ee91 ("x86/mm/64: Make __PHYSICAL_MASK_SHIFT always 52")
changed __PHYSICAL_MASK_SHIFT from 46 to 52 in support of 5-level paging.
This change resulted in SEV guests failing to boot because the encryption
bit was no longer being automatically masked out.  The compressed boot
path now requires sme_me_mask to be defined in order for the pagetable
functions, such as pud_present(), to properly mask out the encryption bit
(currently bit 47) when evaluating pagetable entries.

Add an sme_me_mask variable in arch/x86/boot/compressed/mem_encrypt.S,
which is set when SEV is active, delete the #undef CONFIG_AMD_MEM_ENCRYPT
from arch/x86/boot/compressed/kaslr_64.c and use sme_me_mask when building
the identify mapped pagetable entries.

Fixes: b83ce5ee91 ("x86/mm/64: Make __PHYSICAL_MASK_SHIFT always 52")
Signed-off-by: Tom Lendacky <thomas.lendacky@amd.com>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Cc: Borislav Petkov <bp@alien8.de>
Cc: Brijesh Singh <brijesh.singh@amd.com>
Cc: "Kirill A. Shutemov" <kirill.shutemov@linux.intel.com>
Cc: "H. Peter Anvin" <hpa@zytor.com>
Link: https://lkml.kernel.org/r/20180327220711.8702.55842.stgit@tlendack-t1.amdoffice.net
2018-03-28 10:42:57 +02:00
..
.gitignore
cmdline.c License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
cpuflags.c License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
early_serial_console.c
eboot.c treewide/trivial: Remove ';;$' typo noise 2018-02-22 10:59:33 +01:00
eboot.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
efi_stub_32.S License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
efi_stub_64.S x86/efi: Avoid triple faults during EFI mixed mode calls 2015-02-13 15:42:56 +00:00
efi_thunk_64.S License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
error.c License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
error.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
head_32.S License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
head_64.S x86/boot/compressed/64: Handle 5-level paging boot if kernel is above 4G 2018-03-12 11:49:25 +01:00
kaslr_64.c x86/boot: Fix SEV boot failure from change to __PHYSICAL_MASK_SHIFT 2018-03-28 10:42:57 +02:00
kaslr.c x86/mm: Initialize 'pgdir_shift' and 'ptrs_per_p4d' at boot-time 2018-02-16 10:48:47 +01:00
Makefile x86/boot/compressed/64: Rename pagetable.c to kaslr_64.c 2018-02-11 12:36:18 +01:00
mem_encrypt.S x86/boot: Fix SEV boot failure from change to __PHYSICAL_MASK_SHIFT 2018-03-28 10:42:57 +02:00
misc.c Linux 4.16-rc7 2018-03-27 08:43:39 +02:00
misc.h x86/boot: Fix SEV boot failure from change to __PHYSICAL_MASK_SHIFT 2018-03-28 10:42:57 +02:00
mkpiggy.c x86/KASLR: Clean up unused code from old 'run_size' and rename it to 'kernel_total_size' 2016-04-29 11:03:30 +02:00
pgtable_64.c x86/boot/compressed/64: Prepare new top-level page table for trampoline 2018-03-12 09:37:26 +01:00
pgtable.h x86/boot/compressed/64: Set up trampoline memory 2018-03-12 09:37:25 +01:00
string.c License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
vmlinux.lds.S License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00