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authorMarc Zyngier <marc.zyngier@arm.com>2016-05-25 15:26:37 +0100
committerChristoffer Dall <christoffer.dall@linaro.org>2016-05-31 16:12:16 +0200
commitb34f2bcbf59fe2d27c37d6553c33611754677103 (patch)
tree58c1b3b69e484ef9a73c50852d4b2d560db3edb7 /arch/arm64
parent637d122baac7ff386c8e96df38ac88cee1551db9 (diff)
downloadlinux-b34f2bcbf59fe2d27c37d6553c33611754677103.tar.bz2
arm64: KVM: Make ICC_SRE_EL1 access return the configured SRE value
When we trap ICC_SRE_EL1, we handle it as RAZ/WI. It would be more correct to actual make it RO, and return the configured value when read. Reviewed-by: Christoffer Dall <christoffer.dall@linaro.org> Signed-off-by: Marc Zyngier <marc.zyngier@arm.com> Signed-off-by: Christoffer Dall <christoffer.dall@linaro.org>
Diffstat (limited to 'arch/arm64')
-rw-r--r--arch/arm64/kvm/sys_regs.c13
1 files changed, 12 insertions, 1 deletions
diff --git a/arch/arm64/kvm/sys_regs.c b/arch/arm64/kvm/sys_regs.c
index 7bbe3ff02602..a57d650f552c 100644
--- a/arch/arm64/kvm/sys_regs.c
+++ b/arch/arm64/kvm/sys_regs.c
@@ -134,6 +134,17 @@ static bool access_gic_sgi(struct kvm_vcpu *vcpu,
return true;
}
+static bool access_gic_sre(struct kvm_vcpu *vcpu,
+ struct sys_reg_params *p,
+ const struct sys_reg_desc *r)
+{
+ if (p->is_write)
+ return ignore_write(vcpu, p);
+
+ p->regval = vcpu->arch.vgic_cpu.vgic_v3.vgic_sre;
+ return true;
+}
+
static bool trap_raz_wi(struct kvm_vcpu *vcpu,
struct sys_reg_params *p,
const struct sys_reg_desc *r)
@@ -958,7 +969,7 @@ static const struct sys_reg_desc sys_reg_descs[] = {
access_gic_sgi },
/* ICC_SRE_EL1 */
{ Op0(0b11), Op1(0b000), CRn(0b1100), CRm(0b1100), Op2(0b101),
- trap_raz_wi },
+ access_gic_sre },
/* CONTEXTIDR_EL1 */
{ Op0(0b11), Op1(0b000), CRn(0b1101), CRm(0b0000), Op2(0b001),