linux

iv/linux

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Lorenzo Pieralisi e2d997366d ARM: kvm: psci: fix handling of unimplemented functions

According to the PSCI specification and the SMC/HVC calling
convention, PSCI function_ids that are not implemented must
return NOT_SUPPORTED as return value.

Current KVM implementation takes an unhandled PSCI function_id
as an error and injects an undefined instruction into the guest
if PSCI implementation is called with a function_id that is not
handled by the resident PSCI version (ie it is not implemented),
which is not the behaviour expected by a guest when calling a
PSCI function_id that is not implemented.

This patch fixes this issue by returning NOT_SUPPORTED whenever
the kvm PSCI call is executed for a function_id that is not
implemented by the PSCI kvm layer.

Cc: <stable@vger.kernel.org> # 3.18+
Cc: Christoffer Dall <christoffer.dall@linaro.org>
Acked-by: Sudeep Holla <sudeep.holla@arm.com>
Signed-off-by: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>
Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>

2015-06-17 09:46:29 +01:00

arm.c

arm/arm64: KVM: Properly account for guest CPU time

2015-06-17 09:46:28 +01:00

coproc_a7.c

arm/arm64: KVM: Use set/way op trapping to track the state of the caches

2015-01-29 23:24:56 +01:00

coproc_a15.c

arm/arm64: KVM: Use set/way op trapping to track the state of the caches

2015-01-29 23:24:56 +01:00

coproc.c

arm/arm64: KVM: Use set/way op trapping to track the state of the caches