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| author | Oliver Upton <oliver.upton@linux.dev> | 2025-03-06 02:08:24 +0300 |
|---|---|---|
| committer | Oliver Upton <oliver.upton@linux.dev> | 2025-03-06 03:56:57 +0300 |
| commit | 03e1b89d051fadf37c617c2fe84304c1e800da91 (patch) | |
| tree | dbba11de0bcbd01a13ed04684914dcd84a7f3a96 /tools/perf/scripts/python/task-analyzer.py | |
| parent | 9d91227364330fd1735d6fc3f7226f854f9f7b8c (diff) | |
| download | linux-03e1b89d051fadf37c617c2fe84304c1e800da91.tar.xz | |
KVM: arm64: Copy MIDR_EL1 into hyp VM when it is writable
KVM recently added a capability that allows userspace to override the
'implementation ID' registers presented to the VM. MIDR_EL1 is a special
example, where the hypervisor can directly set the value when read from
EL1 using VPIDR_EL2.
Copy the VM-wide value for MIDR_EL1 into the hyp VM for non-protected
guests when the capability is enabled so VPIDR_EL2 gets set up
correctly.
Reported-by: Mark Brown <broonie@kernel.org>
Closes: https://lore.kernel.org/kvmarm/ac594b9c-4bbb-46c8-9391-e7a68ce4de5b@sirena.org.uk/
Fixes: 3adaee783061 ("KVM: arm64: Allow userspace to change the implementation ID registers")
Reviewed-by: Marc Zyngier <maz@kernel.org>
Link: https://lore.kernel.org/r/20250305230825.484091-3-oliver.upton@linux.dev
Signed-off-by: Oliver Upton <oliver.upton@linux.dev>
Diffstat (limited to 'tools/perf/scripts/python/task-analyzer.py')
0 files changed, 0 insertions, 0 deletions