diff options
author | David Brazdil <dbrazdil@google.com> | 2021-01-05 21:05:38 +0300 |
---|---|---|
committer | Marc Zyngier <maz@kernel.org> | 2021-01-23 17:01:00 +0300 |
commit | 6ec6259d7084ed32e164c9f7b69049464dd90fa5 (patch) | |
tree | 775107adfbbf9d41e3591b1083b4f194e9177a07 /arch/arm64/include/asm/sections.h | |
parent | 8c49b5d43d4c45ca0bb0d1faa23feef2e76e89fa (diff) | |
download | linux-6ec6259d7084ed32e164c9f7b69049464dd90fa5.tar.xz |
KVM: arm64: Apply hyp relocations at runtime
KVM nVHE code runs under a different VA mapping than the kernel, hence
so far it avoided using absolute addressing because the VA in a constant
pool is relocated by the linker to a kernel VA (see hyp_symbol_addr).
Now the kernel has access to a list of positions that contain a kimg VA
but will be accessed only in hyp execution context. These are generated
by the gen-hyprel build-time tool and stored in .hyp.reloc.
Add early boot pass over the entries and convert the kimg VAs to hyp VAs.
Note that this requires for .hyp* ELF sections to be mapped read-write
at that point.
Signed-off-by: David Brazdil <dbrazdil@google.com>
Signed-off-by: Marc Zyngier <maz@kernel.org>
Link: https://lore.kernel.org/r/20210105180541.65031-6-dbrazdil@google.com
Diffstat (limited to 'arch/arm64/include/asm/sections.h')
-rw-r--r-- | arch/arm64/include/asm/sections.h | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/arch/arm64/include/asm/sections.h b/arch/arm64/include/asm/sections.h index a6f3557d1ab2..2f36b16a5b5d 100644 --- a/arch/arm64/include/asm/sections.h +++ b/arch/arm64/include/asm/sections.h @@ -12,6 +12,7 @@ extern char __hibernate_exit_text_start[], __hibernate_exit_text_end[]; extern char __hyp_idmap_text_start[], __hyp_idmap_text_end[]; extern char __hyp_text_start[], __hyp_text_end[]; extern char __hyp_rodata_start[], __hyp_rodata_end[]; +extern char __hyp_reloc_begin[], __hyp_reloc_end[]; extern char __idmap_text_start[], __idmap_text_end[]; extern char __initdata_begin[], __initdata_end[]; extern char __inittext_begin[], __inittext_end[]; |