mirror of
https://github.com/AuxXxilium/linux_dsm_epyc7002.git
synced 2024-12-23 21:16:02 +07:00
ab0eb16205
Memory regions that are reserved using efi_mem_reserve_persistent() are recorded in a special EFI config table which survives kexec, allowing the incoming kernel to honour them as well. However, such reservations are not visible in /proc/iomem, and so the kexec tools that load the incoming kernel and its initrd into memory may overwrite these reserved regions before the incoming kernel has a chance to reserve them from further use. Address this problem by adding these reservations to /proc/iomem as they are created. Note that reservations that are inherited from a previous kernel are memblock_reserve()'d early on, so they are already visible in /proc/iomem. Tested-by: Masayoshi Mizuma <m.mizuma@jp.fujitsu.com> Tested-by: Bhupesh Sharma <bhsharma@redhat.com> Signed-off-by: Ard Biesheuvel <ardb@kernel.org> Reviewed-by: Bhupesh Sharma <bhsharma@redhat.com> Cc: <stable@vger.kernel.org> # v5.4+ Cc: Andy Shevchenko <andriy.shevchenko@linux.intel.com> Cc: Arvind Sankar <nivedita@alum.mit.edu> Cc: linux-efi@vger.kernel.org Link: https://lkml.kernel.org/r/20191206165542.31469-2-ardb@kernel.org Signed-off-by: Ingo Molnar <mingo@kernel.org> |
||
---|---|---|
.. | ||
libstub | ||
test | ||
apple-properties.c | ||
arm-init.c | ||
arm-runtime.c | ||
capsule-loader.c | ||
capsule.c | ||
cper-arm.c | ||
cper-x86.c | ||
cper.c | ||
dev-path-parser.c | ||
earlycon.c | ||
efi-bgrt.c | ||
efi-pstore.c | ||
efi.c | ||
efibc.c | ||
efivars.c | ||
esrt.c | ||
fake_mem.c | ||
fake_mem.h | ||
Kconfig | ||
Makefile | ||
memattr.c | ||
memmap.c | ||
rci2-table.c | ||
reboot.c | ||
runtime-map.c | ||
runtime-wrappers.c | ||
tpm.c | ||
vars.c | ||
x86_fake_mem.c |