Commit 20163403 authored Sep 06, 2016 by Marc Zyngier Committed by Christoffer Dall Sep 08, 2016

arm64: KVM: Allow an exit code to be tagged with an SError



Similarily to EL1, an asynchronous abort can be triggered whilst
running at EL2. But instead of making that a new error code,
we need to communicate it to the rest of KVM together with
the exit reason. So let's hijack a single bit that allows the
exception code to be tagged with a "pending SError" information.

Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
Signed-off-by: Christoffer Dall <christoffer.dall@linaro.org>

parent 1b51e5fa

arch/arm64/include/asm/kvm_asm.h

+4 −0

Original line number	Diff line number	Diff line
		@@ -20,6 +20,10 @@

		#include <asm/virt.h>

		#define ARM_EXIT_WITH_SERROR_BIT 31
		#define ARM_EXCEPTION_CODE(x) ((x) & ~(1U << ARM_EXIT_WITH_SERROR_BIT))
		#define ARM_SERROR_PENDING(x) !!((x) & (1U << ARM_EXIT_WITH_SERROR_BIT))

		#define ARM_EXCEPTION_IRQ 0
		#define ARM_EXCEPTION_EL1_SERROR 1
		#define ARM_EXCEPTION_TRAP 2