KVM: arm64: Compute per-vCPU FGTs at vcpu_load()

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To date KVM has used the fine-grained traps for the sake of UNDEF
enforcement (so-called FGUs), meaning the constituent parts could be
computed on a per-VM basis and folded into the effective value when
programmed.

Prepare for traps changing based on the vCPU context by computing the
whole mess of them at vcpu_load(). Aggressively inline all the helpers
to preserve the build-time checks that were there before.

Signed-off-by: Oliver Upton <oliver.upton@linux.dev>
Reviewed-by: Joey Gouly <joey.gouly@arm.com>
Signed-off-by: Marc Zyngier <maz@kernel.org>

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Oliver Upton 2025-09-24 16:51:49 -07:00 • committed by Marc Zyngier

parent 5c7cf1e44e

commit fb10ddf35c

5 changed files with 151 additions and 131 deletions

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50

arch/arm64/include/asm/kvm_host.h

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arch/arm64/kvm/arm.c

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arch/arm64/kvm/config.c

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arch/arm64/kvm/hyp/include/hyp/switch.h

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arch/arm64/kvm/hyp/nvhe/pkvm.c

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