From e7d54416cf7a30928a455ddf86ca57d766e9a902 Mon Sep 17 00:00:00 2001 From: Eric Auger Date: Tue, 28 Mar 2017 19:20:40 +0200 Subject: [PATCH] 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 Reported-by: Prakash B Tested-by: Alexander Graf Message-id: 1490721640-13052-1-git-send-email-eric.auger@redhat.com Signed-off-by: Peter Maydell --- hw/intc/arm_gicv3_kvm.c | 17 +++++++++++------ 1 file changed, 11 insertions(+), 6 deletions(-) diff --git a/hw/intc/arm_gicv3_kvm.c b/hw/intc/arm_gicv3_kvm.c index 81f0403117..19aab56072 100644 --- a/hw/intc/arm_gicv3_kvm.c +++ b/hw/intc/arm_gicv3_kvm.c @@ -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) -- 2.11.4.GIT