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| author |   Ryan Roberts <ryan.roberts@arm.com> | 2023-11-27 11:17:30 +0000 |
|---|---|---|
| committer |   Marc Zyngier <maz@kernel.org> | 2023-11-27 15:03:50 +0000 |
| commit | b1366d21daaebb8e474e4169c5e557fbb37bfdc0 (patch) | |
| tree | 44de9e75a1196c7d0bc85f7536ad1b49a0cc1384 /tools/perf/scripts/python/export-to-sqlite.py | |
| parent | arm64/mm: Add FEAT_LPA2 specific ID_AA64MMFR0.TGRAN[2] (diff) | |
| download | wireguard-linux-b1366d21daaebb8e474e4169c5e557fbb37bfdc0.tar.xz wireguard-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
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