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hw/intc/arm_gicv3_kvm: Check KVM_DEV_ARM_VGIC_GRP_CPU_SYSREGS in reset 

KVM_DEV_ARM_VGIC_GRP_CPU_SYSREGS needs to be checked before
attempting to read ICC_CTLR_EL1; otherwise kernel versions not
exposing this kvm device group will be incompatible with qemu 2.9.

Fixes: 07a5628  ("hw/intc/arm_gicv3_kvm: Reset GICv3 cpu interface registers")
Signed-off-by: Eric Auger <eric.auger@redhat.com>
Reported-by: Prakash B <bjsprakash.linux@gmail.com>
Tested-by: Alexander Graf <agraf@suse.de>
Message-id: 1490721640-13052-1-git-send-email-eric.auger@redhat.com
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
This commit is contained in:
Eric Auger 2017-03-28 19:20:40 +02:00 committed by Peter Maydell
parent 05a6f451eb
commit e7d54416cf
1 changed files with 11 additions and 6 deletions
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17
hw/intc/arm_gicv3_kvm.c
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@ -614,12 +614,6 @@ static void arm_gicv3_icc_reset(CPUARMState *env, const ARMCPRegInfo *ri)
s = c->gic;
cpu = ARM_CPU(c->cpu);
/* Initialize to actual HW supported configuration */
kvm_device_access(s->dev_fd, KVM_DEV_ARM_VGIC_GRP_CPU_SYSREGS,
KVM_VGIC_ATTR(ICC_CTLR_EL1, cpu->mp_affinity),
&c->icc_ctlr_el1[GICV3_NS], false);
c->icc_ctlr_el1[GICV3_S] = c->icc_ctlr_el1[GICV3_NS];
c->icc_pmr_el1 = 0;
c->icc_bpr[GICV3_G0] = GIC_MIN_BPR;
c->icc_bpr[GICV3_G1] = GIC_MIN_BPR;
@ -628,6 +622,17 @@ static void arm_gicv3_icc_reset(CPUARMState *env, const ARMCPRegInfo *ri)
c->icc_sre_el1 = 0x7;
memset(c->icc_apr, 0, sizeof(c->icc_apr));
memset(c->icc_igrpen, 0, sizeof(c->icc_igrpen));
if (s->migration_blocker) {
return;
}
/* Initialize to actual HW supported configuration */
kvm_device_access(s->dev_fd, KVM_DEV_ARM_VGIC_GRP_CPU_SYSREGS,
KVM_VGIC_ATTR(ICC_CTLR_EL1, cpu->mp_affinity),
&c->icc_ctlr_el1[GICV3_NS], false);
c->icc_ctlr_el1[GICV3_S] = c->icc_ctlr_el1[GICV3_NS];
}
static void kvm_arm_gicv3_reset(DeviceState *dev)