KVM: arm64: Don't hijack guest context MDSCR_EL1

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Stealing MDSCR_EL1 in the guest's kvm_cpu_context for external debugging
is rather gross. Just add a field for this instead and let the context
switch code pick the correct one based on the debug owner.

Tested-by: James Clark <james.clark@linaro.org>
Signed-off-by: Oliver Upton <oliver.upton@linux.dev>
Link: https://lore.kernel.org/r/20241219224116.3941496-15-oliver.upton@linux.dev
Signed-off-by: Marc Zyngier <maz@kernel.org>

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Oliver Upton 2024-12-19 14:41:11 -08:00 • committed by Marc Zyngier

parent 75a5fbaf66

commit 4ad3a0b87f

3 changed files with 64 additions and 52 deletions

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2

arch/arm64/include/asm/kvm_host.h

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75

arch/arm64/kvm/debug.c

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39

arch/arm64/kvm/hyp/include/hyp/sysreg-sr.h

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