arm64: KVM: VHE: Context switch MDSCR_EL1

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The kprobe enablement work has uncovered that changes made by
a guest to MDSCR_EL1 were propagated to the host when VHE was
enabled, leading to unexpected exception being delivered.

Moving this register to the list of registers that are always
context-switched fixes the issue.

Fixes: 9c6c356832 ("arm64: KVM: VHE: Split save/restore of registers shared between guest and host")
Cc: stable@vger.kernel.org #4.6
Reported-by: Tirumalesh Chalamarla <Tirumalesh.Chalamarla@cavium.com>
Tested-by: Tirumalesh Chalamarla <Tirumalesh.Chalamarla@cavium.com>
Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
Signed-off-by: Radim Krčmář <rkrcmar@redhat.com>

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Marc Zyngier 2016-07-19 13:56:54 +01:00 • committed by Radim Krčmář

parent b244c9fc25

commit 4c47eb1c18

1 changed files with 4 additions and 4 deletions

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

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