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Kirill A. Shutemov 1b3a626436 x86/boot/compressed/64: Validate trampoline placement against E820 
There were two report of boot failure cased by trampoline placed into
a reserved memory region. It can happen on machines that don't report
EBDA correctly.

Fix the problem by re-validating the found address against the E820 table.
If the address is in a reserved area, find the next usable region below the
initial address.

Fixes: 3548e131ec ("x86/boot/compressed/64: Find a place for 32-bit trampoline")
Reported-by: Dmitry Malkin <d.malkin@real-time-systems.com>
Reported-by: youling 257 <youling257@gmail.com>
Signed-off-by: Kirill A. Shutemov <kirill.shutemov@linux.intel.com>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Cc: "H. Peter Anvin" <hpa@zytor.com>
Link: https://lkml.kernel.org/r/20180801133225.38121-1-kirill.shutemov@linux.intel.com
2018-08-02 14:22:22 +02:00
..
.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 x86, boot: Don't compile early_serial_console.c when !CONFIG_EARLY_PRINTK 2014-08-17 14:58:24 -07:00
eboot.c efi/x86: Fix mixed mode reboot loop by removing pointless call to PciIo->Attributes() 2018-07-11 13:15:21 +02:00
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/mm: Introduce the 'no5lvl' kernel parameter 2018-05-19 11:56:57 +02:00
kaslr.c x86/mm: Unify pgtable_l5_enabled usage in early boot code 2018-05-19 11:56:57 +02:00
kaslr_64.c x86/mm: Decouple dynamic __PHYSICAL_MASK from AMD SME 2018-06-06 13:38:01 +02:00
Makefile x86/boot: Fix if_changed build flip/flop bug 2018-07-25 12:00:08 +02:00
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/mm: Unify pgtable_l5_enabled usage in early boot code 2018-05-19 11:56:57 +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.h x86/boot/compressed/64: Set up trampoline memory 2018-03-12 09:37:25 +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