diff options
| author | Will Deacon <will@kernel.org> | 2020-09-28 13:45:24 +0300 |
|---|---|---|
| committer | Will Deacon <will@kernel.org> | 2020-09-29 18:08:17 +0300 |
| commit | 9ef2b48be9bba70ded9372fc81e678e707306060 (patch) | |
| tree | 78ee8e1e33c1baf46d920331edfa1a7980316b78 /arch/arm64/kernel/proton-pack.c | |
| parent | 31c84d6c9cde673b3866972552ec52e4c522b4fa (diff) | |
| download | linux-9ef2b48be9bba70ded9372fc81e678e707306060.tar.xz | |
KVM: arm64: Allow patching EL2 vectors even with KASLR is not enabled
Patching the EL2 exception vectors is integral to the Spectre-v2
workaround, where it can be necessary to execute CPU-specific sequences
to nobble the branch predictor before running the hypervisor text proper.
Remove the dependency on CONFIG_RANDOMIZE_BASE and allow the EL2 vectors
to be patched even when KASLR is not enabled.
Fixes: 7a132017e7a5 ("KVM: arm64: Replace CONFIG_KVM_INDIRECT_VECTORS with CONFIG_RANDOMIZE_BASE")
Reported-by: kernel test robot <lkp@intel.com>
Link: https://lore.kernel.org/r/202009221053.Jv1XsQUZ%lkp@intel.com
Signed-off-by: Will Deacon <will@kernel.org>
Diffstat (limited to 'arch/arm64/kernel/proton-pack.c')
| -rw-r--r-- | arch/arm64/kernel/proton-pack.c | 2 |
1 files changed, 0 insertions, 2 deletions
diff --git a/arch/arm64/kernel/proton-pack.c b/arch/arm64/kernel/proton-pack.c index b1ea935fd948..1fbaa0240d4c 100644 --- a/arch/arm64/kernel/proton-pack.c +++ b/arch/arm64/kernel/proton-pack.c @@ -177,7 +177,6 @@ enum mitigation_state arm64_get_spectre_v2_state(void) } #ifdef CONFIG_KVM -#ifdef CONFIG_RANDOMIZE_BASE #include <asm/cacheflush.h> #include <asm/kvm_asm.h> @@ -235,7 +234,6 @@ static void install_bp_hardening_cb(bp_hardening_cb_t fn) { __this_cpu_write(bp_hardening_data.fn, fn); } -#endif /* CONFIG_RANDOMIZE_BASE */ #endif /* CONFIG_KVM */ static void call_smc_arch_workaround_1(void) |