KVM: arm64: Handle SCXTNUM_ELx traps

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As the kernel never sets HCR_EL2.EnSCXT, accesses to SCXTNUM_ELx
will trap to EL2. Let's handle that as gracefully as possible
by injecting an UNDEF exception into the guest. This is consistent
with the guest's view of ID_AA64PFR0_EL1.CSV2 being at most 1.

Signed-off-by: Marc Zyngier <maz@kernel.org>
Acked-by: Will Deacon <will@kernel.org>
Link: https://lore.kernel.org/r/20201110141308.451654-4-maz@kernel.org

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Marc Zyngier 2020-11-10 14:13:08 +00:00

parent 338b17933a

commit ed4ffaf49b

2 changed files with 8 additions and 0 deletions

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4

arch/arm64/include/asm/sysreg.h

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4

arch/arm64/kvm/sys_regs.c

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