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authorPasha Tatashin <pasha.tatashin@soleen.com>2021-09-30 14:31:09 +0000
committerWill Deacon <will@kernel.org>2021-10-01 13:31:00 +0100
commit3744b5280e67f54579abe92576deec0079242323 (patch)
treee0a9a519d17edcebe48b5af1acecde8ab95f202c /arch/arm64/kernel/asm-offsets.c
parent19a046f07ce5a5c34ebb6432192d98cfdb38444f (diff)
downloadlinux-next-3744b5280e67f54579abe92576deec0079242323.tar.gz
arm64: kexec: install a copy of the linear-map
To perform the kexec relocation with the MMU enabled, we need a copy of the linear map. Create one, and install it from the relocation code. This has to be done from the assembly code as it will be idmapped with TTBR0. The kernel runs in TTRB1, so can't use the break-before-make sequence on the mapping it is executing from. The makes no difference yet as the relocation code runs with the MMU disabled. Suggested-by: James Morse <james.morse@arm.com> Signed-off-by: Pasha Tatashin <pasha.tatashin@soleen.com> Acked-by: Catalin Marinas <catalin.marinas@arm.com> Link: https://lore.kernel.org/r/20210930143113.1502553-12-pasha.tatashin@soleen.com Signed-off-by: Will Deacon <will@kernel.org>
Diffstat (limited to 'arch/arm64/kernel/asm-offsets.c')
-rw-r--r--arch/arm64/kernel/asm-offsets.c2
1 files changed, 2 insertions, 0 deletions
diff --git a/arch/arm64/kernel/asm-offsets.c b/arch/arm64/kernel/asm-offsets.c
index 6a2b8b1a4872..1f565224dafd 100644
--- a/arch/arm64/kernel/asm-offsets.c
+++ b/arch/arm64/kernel/asm-offsets.c
@@ -175,6 +175,8 @@ int main(void)
#ifdef CONFIG_KEXEC_CORE
DEFINE(KIMAGE_ARCH_DTB_MEM, offsetof(struct kimage, arch.dtb_mem));
DEFINE(KIMAGE_ARCH_EL2_VECTORS, offsetof(struct kimage, arch.el2_vectors));
+ DEFINE(KIMAGE_ARCH_ZERO_PAGE, offsetof(struct kimage, arch.zero_page));
+ DEFINE(KIMAGE_ARCH_TTBR1, offsetof(struct kimage, arch.ttbr1));
DEFINE(KIMAGE_HEAD, offsetof(struct kimage, head));
DEFINE(KIMAGE_START, offsetof(struct kimage, start));
BLANK();