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| author | David Brazdil <dbrazdil@google.com> | 2020-07-21 10:44:45 +0100 |
|---|---|---|
| committer | Marc Zyngier <maz@kernel.org> | 2020-07-28 10:41:11 +0100 |
| commit | a59a2edbbba7397fede86e40a3da17e5beebf98b (patch) | |
| tree | fe9e1c6219cee12a7013d8b1b8e39b4b18c551b3 /arch/arm64/kernel | |
| parent | 24f69c0fa4e252f706884114b7d6353aa07678b5 (diff) | |
| download | lwn-a59a2edbbba7397fede86e40a3da17e5beebf98b.tar.gz lwn-a59a2edbbba7397fede86e40a3da17e5beebf98b.zip | |
KVM: arm64: Substitute RANDOMIZE_BASE for HARDEN_EL2_VECTORS
The HARDEN_EL2_VECTORS config maps vectors at a fixed location on cores which
are susceptible to Spector variant 3a (A57, A72) to prevent defeating hyp
layout randomization by leaking the value of VBAR_EL2.
Since this feature is only applicable when EL2 layout randomization is enabled,
unify both behind the same RANDOMIZE_BASE Kconfig. Majority of code remains
conditional on a capability selected for the affected cores.
Signed-off-by: David Brazdil <dbrazdil@google.com>
Signed-off-by: Marc Zyngier <maz@kernel.org>
Link: https://lore.kernel.org/r/20200721094445.82184-3-dbrazdil@google.com
Diffstat (limited to 'arch/arm64/kernel')
| -rw-r--r-- | arch/arm64/kernel/cpu_errata.c | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/arch/arm64/kernel/cpu_errata.c b/arch/arm64/kernel/cpu_errata.c index ad06d6802d2e..a524142e55d0 100644 --- a/arch/arm64/kernel/cpu_errata.c +++ b/arch/arm64/kernel/cpu_errata.c @@ -635,7 +635,7 @@ has_neoverse_n1_erratum_1542419(const struct arm64_cpu_capabilities *entry, return is_midr_in_range(midr, &range) && has_dic; } -#if defined(CONFIG_HARDEN_EL2_VECTORS) +#ifdef CONFIG_RANDOMIZE_BASE static const struct midr_range ca57_a72[] = { MIDR_ALL_VERSIONS(MIDR_CORTEX_A57), @@ -880,7 +880,7 @@ const struct arm64_cpu_capabilities arm64_errata[] = { .type = ARM64_CPUCAP_LOCAL_CPU_ERRATUM, .matches = check_branch_predictor, }, -#ifdef CONFIG_HARDEN_EL2_VECTORS +#ifdef CONFIG_RANDOMIZE_BASE { .desc = "EL2 vector hardening", .capability = ARM64_HARDEN_EL2_VECTORS, |