KVM: arm64: Relax CPTR_EL2 handling when FEAT_NV2p1 is present

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With FEAT_NV2P1, it is no longer necessary to trap CPTR_EL2 accesses
via CPACR_EL1, as CPACR_EL1.TCPAC is guaranteed to be stateful.

Prevent such trapping and context switch CPACTR_EL1 in NV contexts
when NV2P1 is present.

Reviewed-by: Joey Gouly <joey.gouly@arm.com>
Reviewed-by: Yuan Yao <yaoyuan@linux.alibaba.com>
Signed-off-by: Marc Zyngier <maz@kernel.org>
Link: https://patch.msgid.link/20260730071022.296811-10-maz@kernel.org
Signed-off-by: Oliver Upton <oupton@kernel.org>

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This commit is contained in:

Marc Zyngier 2026-07-30 08:10:02 +01:00 • committed by Oliver Upton

parent 0dbb49dcdb

commit 649ba04326

4 changed files with 15 additions and 6 deletions

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

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arch/arm64/kvm/hyp/vhe/switch.c

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arch/arm64/kvm/hyp/vhe/sysreg-sr.c

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arch/arm64/kvm/sys_regs.c

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