diff options
| author | Pasha Tatashin <pasha.tatashin@soleen.com> | 2021-09-30 14:31:10 +0000 |
|---|---|---|
| committer | Will Deacon <will@kernel.org> | 2021-10-01 13:31:00 +0100 |
| commit | efc2d0f20a9dab2d0e92a271dc4b8e3496377739 (patch) | |
| tree | fa0b24a0c10e8f42a9da2e267bc0ba93856546dc /arch/arm64/include/asm/kexec.h | |
| parent | 3744b5280e67f54579abe92576deec0079242323 (diff) | |
arm64: kexec: keep MMU enabled during kexec relocation
Now, that we have linear map page tables configured, keep MMU enabled
to allow faster relocation of segments to final destination.
Cavium ThunderX2:
Kernel Image size: 38M Iniramfs size: 46M Total relocation size: 84M
MMU-disabled:
relocation 7.489539915s
MMU-enabled:
relocation 0.03946095s
Broadcom Stingray:
The performance data: for a moderate size kernel + initramfs: 25M the
relocation was taking 0.382s, with enabled MMU it now takes
0.019s only or x20 improvement.
The time is proportional to the size of relocation, therefore if initramfs
is larger, 100M it could take over a second.
Signed-off-by: Pasha Tatashin <pasha.tatashin@soleen.com>
Tested-by: Pingfan Liu <piliu@redhat.com>
Acked-by: Catalin Marinas <catalin.marinas@arm.com>
Link: https://lore.kernel.org/r/20210930143113.1502553-13-pasha.tatashin@soleen.com
Signed-off-by: Will Deacon <will@kernel.org>
Diffstat (limited to 'arch/arm64/include/asm/kexec.h')
| -rw-r--r-- | arch/arm64/include/asm/kexec.h | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/arch/arm64/include/asm/kexec.h b/arch/arm64/include/asm/kexec.h index d678f0ceb7ee..dca6dedc3b25 100644 --- a/arch/arm64/include/asm/kexec.h +++ b/arch/arm64/include/asm/kexec.h @@ -97,8 +97,11 @@ struct kimage_arch { phys_addr_t dtb_mem; phys_addr_t kern_reloc; phys_addr_t el2_vectors; + phys_addr_t ttbr0; phys_addr_t ttbr1; phys_addr_t zero_page; + unsigned long phys_offset; + unsigned long t0sz; }; #ifdef CONFIG_KEXEC_FILE |