diff options
| author | David Brazdil <dbrazdil@google.com> | 2021-01-05 18:05:38 +0000 |
|---|---|---|
| committer | Marc Zyngier <maz@kernel.org> | 2021-01-23 14:01:00 +0000 |
| commit | 6ec6259d7084ed32e164c9f7b69049464dd90fa5 (patch) | |
| tree | 775107adfbbf9d41e3591b1083b4f194e9177a07 /arch/arm64/kernel/smp.c | |
| parent | 8c49b5d43d4c45ca0bb0d1faa23feef2e76e89fa (diff) | |
| download | linux-6ec6259d7084ed32e164c9f7b69049464dd90fa5.tar.gz | |
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/kernel/smp.c')
| -rw-r--r-- | arch/arm64/kernel/smp.c | 4 |
1 files changed, 3 insertions, 1 deletions
diff --git a/arch/arm64/kernel/smp.c b/arch/arm64/kernel/smp.c index ad00f99ee9b0..357590beaabb 100644 --- a/arch/arm64/kernel/smp.c +++ b/arch/arm64/kernel/smp.c @@ -434,8 +434,10 @@ static void __init hyp_mode_check(void) "CPU: CPUs started in inconsistent modes"); else pr_info("CPU: All CPU(s) started at EL1\n"); - if (IS_ENABLED(CONFIG_KVM) && !is_kernel_in_hyp_mode()) + if (IS_ENABLED(CONFIG_KVM) && !is_kernel_in_hyp_mode()) { kvm_compute_layout(); + kvm_apply_hyp_relocations(); + } } void __init smp_cpus_done(unsigned int max_cpus) |