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linux/arch/x86/boot/compressed
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Kirill A. Shutemov 45b13b424f x86/boot/compressed/64: Do not corrupt EDX on EFER.LME=1 setting 
RDMSR in the trampoline code overwrites EDX but that register is used
to indicate whether 5-level paging has to be enabled and if clobbered,
leads to failure to boot on a 5-level paging machine.

Preserve EDX on the stack while we are dealing with EFER.

Fixes: b677dfae5a ("x86/boot/compressed/64: Set EFER.LME=1 in 32-bit trampoline before returning to long mode")
Reported-by: Kyle D Pelton <kyle.d.pelton@intel.com>
Signed-off-by: Kirill A. Shutemov <kirill.shutemov@linux.intel.com>
Signed-off-by: Borislav Petkov <bp@suse.de>
Cc: dave.hansen@linux.intel.com
Cc: "H. Peter Anvin" <hpa@zytor.com>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Wei Huang <wei@redhat.com>
Cc: x86-ml <x86@kernel.org>
Link: https://lkml.kernel.org/r/20190206115253.1907-1-kirill.shutemov@linux.intel.com
2019-02-06 18:56:18 +01:00
..
.gitignore
cmdline.c x86/mm: Introduce the 'no5lvl' kernel parameter 2018-05-19 11:56:57 +02:00
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 x86/efi: Allocate e820 buffer before calling efi_exit_boot_service 2018-11-30 08:30:07 +01:00
eboot.h efi/x86: Align efi_uga_draw_protocol typedef names to convention 2018-07-22 14:13:42 +02:00
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
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: Do not corrupt EDX on EFER.LME=1 setting 2019-02-06 18:56:18 +01:00
kaslr.c x86/boot/KASLR: Remove return value from handle_mem_options() 2018-09-10 15:07:11 +02:00
kaslr_64.c x86/mm: Decouple dynamic __PHYSICAL_MASK from AMD SME 2018-06-06 13:38:01 +02:00
Makefile kbuild: remove redundant target cleaning on failure 2019-01-06 09:46:51 +09:00
mem_encrypt.S x86/boot: Fix kexec booting failure in the SEV bit detection code 2018-09-27 19:35:03 +02:00
misc.c Linux 4.16-rc7 2018-03-27 08:43:39 +02:00
misc.h x86/paravirt: Introduce new config option PARAVIRT_XXL 2018-09-03 16:50:35 +02:00
mkpiggy.c
pgtable.h x86/boot/compressed/64: Set EFER.LME=1 in 32-bit trampoline before returning to long mode 2019-01-29 21:58:59 +01:00
pgtable_64.c x86/boot/compressed/64: Validate trampoline placement against E820 2018-08-02 14:22:22 +02:00
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