KVM: arm64: Evaluate debug owner at vcpu_load()

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In preparation for tossing the debug_ptr mess, introduce an enumeration
to track the ownership of the debug registers while in the guest. Update
the owner at vcpu_load() based on whether the host needs to steal the
guest's debug context or if breakpoints/watchpoints are actively in use.

Tested-by: James Clark <james.clark@linaro.org>
Signed-off-by: Oliver Upton <oliver.upton@linux.dev>
Link: https://lore.kernel.org/r/20241219224116.3941496-7-oliver.upton@linux.dev
Signed-off-by: Marc Zyngier <maz@kernel.org>

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Oliver Upton 2024-12-19 14:41:03 -08:00 • committed by Marc Zyngier

parent b47ffd13fd

commit cd9b10102a

4 changed files with 60 additions and 0 deletions

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11

arch/arm64/include/asm/kvm_host.h

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1

arch/arm64/kvm/arm.c

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46

arch/arm64/kvm/debug.c

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2

arch/arm64/kvm/sys_regs.c

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