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| author | Ryan Roberts <ryan.roberts@arm.com> | 2023-11-27 12:17:30 +0100 |
|---|---|---|
| committer | Marc Zyngier <maz@kernel.org> | 2023-11-27 16:03:50 +0100 |
| commit | b1366d21daaebb8e474e4169c5e557fbb37bfdc0 (patch) | |
| tree | 44de9e75a1196c7d0bc85f7536ad1b49a0cc1384 /arch/arm64/tools | |
| parent | arm64/mm: Add FEAT_LPA2 specific ID_AA64MMFR0.TGRAN[2] (diff) | |
| download | linux-b1366d21daaebb8e474e4169c5e557fbb37bfdc0.tar.xz linux-b1366d21daaebb8e474e4169c5e557fbb37bfdc0.zip | |
arm64: Add ARM64_HAS_LPA2 CPU capability
Expose FEAT_LPA2 as a capability so that we can take advantage of
alternatives patching in the hypervisor.
Although FEAT_LPA2 presence is advertised separately for stage1 and
stage2, the expectation is that in practice both stages will either
support or not support it. Therefore, we combine both into a single
capability, allowing us to simplify the implementation. KVM requires
support in both stages in order to use LPA2 since the same library is
used for hyp stage 1 and guest stage 2 pgtables.
Reviewed-by: Oliver Upton <oliver.upton@linux.dev>
Signed-off-by: Ryan Roberts <ryan.roberts@arm.com>
Signed-off-by: Marc Zyngier <maz@kernel.org>
Link: https://lore.kernel.org/r/20231127111737.1897081-6-ryan.roberts@arm.com
Diffstat (limited to 'arch/arm64/tools')
| -rw-r--r-- | arch/arm64/tools/cpucaps | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/arch/arm64/tools/cpucaps b/arch/arm64/tools/cpucaps index b98c38288a9d..919eceb0b3da 100644 --- a/arch/arm64/tools/cpucaps +++ b/arch/arm64/tools/cpucaps @@ -37,6 +37,7 @@ HAS_GIC_PRIO_MASKING HAS_GIC_PRIO_RELAXED_SYNC HAS_HCX HAS_LDAPR +HAS_LPA2 HAS_LSE_ATOMICS HAS_MOPS HAS_NESTED_VIRT |