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authorMarc Zyngier <marc.zyngier@arm.com>2017-06-15 09:35:15 +0100
committerMarc Zyngier <marc.zyngier@arm.com>2017-06-15 09:35:15 +0100
commit6f2f10cabe73944488a62df16695c86e20d4c3f9 (patch)
tree514fa4c6127892ed55d5a00611ce95555c3ce011 /virt
parentebb127f2d6f32665643165289151bd20929d9931 (diff)
parent33b5c38852b29736f3b472dd095c9a18ec22746f (diff)
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Merge branch 'kvmarm-master/master' into HEAD
Diffstat (limited to 'virt')
-rw-r--r--virt/kvm/arm/hyp/vgic-v3-sr.c18
-rw-r--r--virt/kvm/arm/mmu.c36
-rw-r--r--virt/kvm/arm/vgic/vgic-init.c5
-rw-r--r--virt/kvm/arm/vgic/vgic-mmio-v2.c16
-rw-r--r--virt/kvm/arm/vgic/vgic-mmio-v3.c12
-rw-r--r--virt/kvm/arm/vgic/vgic-v2.c35
-rw-r--r--virt/kvm/arm/vgic/vgic-v3.c54
-rw-r--r--virt/kvm/arm/vgic/vgic.h12
8 files changed, 140 insertions, 48 deletions
diff --git a/virt/kvm/arm/hyp/vgic-v3-sr.c b/virt/kvm/arm/hyp/vgic-v3-sr.c
index bce6037cf01d..87940364570b 100644
--- a/virt/kvm/arm/hyp/vgic-v3-sr.c
+++ b/virt/kvm/arm/hyp/vgic-v3-sr.c
@@ -22,7 +22,7 @@
#include <asm/kvm_hyp.h>
#define vtr_to_max_lr_idx(v) ((v) & 0xf)
-#define vtr_to_nr_pri_bits(v) (((u32)(v) >> 29) + 1)
+#define vtr_to_nr_pre_bits(v) ((((u32)(v) >> 26) & 7) + 1)
static u64 __hyp_text __gic_v3_get_lr(unsigned int lr)
{
@@ -135,13 +135,13 @@ void __hyp_text __vgic_v3_save_state(struct kvm_vcpu *vcpu)
if (used_lrs) {
int i;
- u32 nr_pri_bits;
+ u32 nr_pre_bits;
cpu_if->vgic_elrsr = read_gicreg(ICH_ELSR_EL2);
write_gicreg(0, ICH_HCR_EL2);
val = read_gicreg(ICH_VTR_EL2);
- nr_pri_bits = vtr_to_nr_pri_bits(val);
+ nr_pre_bits = vtr_to_nr_pre_bits(val);
for (i = 0; i < used_lrs; i++) {
if (cpu_if->vgic_elrsr & (1 << i))
@@ -152,7 +152,7 @@ void __hyp_text __vgic_v3_save_state(struct kvm_vcpu *vcpu)
__gic_v3_set_lr(0, i);
}
- switch (nr_pri_bits) {
+ switch (nr_pre_bits) {
case 7:
cpu_if->vgic_ap0r[3] = read_gicreg(ICH_AP0R3_EL2);
cpu_if->vgic_ap0r[2] = read_gicreg(ICH_AP0R2_EL2);
@@ -162,7 +162,7 @@ void __hyp_text __vgic_v3_save_state(struct kvm_vcpu *vcpu)
cpu_if->vgic_ap0r[0] = read_gicreg(ICH_AP0R0_EL2);
}
- switch (nr_pri_bits) {
+ switch (nr_pre_bits) {
case 7:
cpu_if->vgic_ap1r[3] = read_gicreg(ICH_AP1R3_EL2);
cpu_if->vgic_ap1r[2] = read_gicreg(ICH_AP1R2_EL2);
@@ -198,7 +198,7 @@ void __hyp_text __vgic_v3_restore_state(struct kvm_vcpu *vcpu)
struct vgic_v3_cpu_if *cpu_if = &vcpu->arch.vgic_cpu.vgic_v3;
u64 used_lrs = vcpu->arch.vgic_cpu.used_lrs;
u64 val;
- u32 nr_pri_bits;
+ u32 nr_pre_bits;
int i;
/*
@@ -217,12 +217,12 @@ void __hyp_text __vgic_v3_restore_state(struct kvm_vcpu *vcpu)
}
val = read_gicreg(ICH_VTR_EL2);
- nr_pri_bits = vtr_to_nr_pri_bits(val);
+ nr_pre_bits = vtr_to_nr_pre_bits(val);
if (used_lrs) {
write_gicreg(cpu_if->vgic_hcr, ICH_HCR_EL2);
- switch (nr_pri_bits) {
+ switch (nr_pre_bits) {
case 7:
write_gicreg(cpu_if->vgic_ap0r[3], ICH_AP0R3_EL2);
write_gicreg(cpu_if->vgic_ap0r[2], ICH_AP0R2_EL2);
@@ -232,7 +232,7 @@ void __hyp_text __vgic_v3_restore_state(struct kvm_vcpu *vcpu)
write_gicreg(cpu_if->vgic_ap0r[0], ICH_AP0R0_EL2);
}
- switch (nr_pri_bits) {
+ switch (nr_pre_bits) {
case 7:
write_gicreg(cpu_if->vgic_ap1r[3], ICH_AP1R3_EL2);
write_gicreg(cpu_if->vgic_ap1r[2], ICH_AP1R2_EL2);
diff --git a/virt/kvm/arm/mmu.c b/virt/kvm/arm/mmu.c
index 313ee646480f..e2e5effba2a9 100644
--- a/virt/kvm/arm/mmu.c
+++ b/virt/kvm/arm/mmu.c
@@ -295,6 +295,13 @@ static void unmap_stage2_range(struct kvm *kvm, phys_addr_t start, u64 size)
assert_spin_locked(&kvm->mmu_lock);
pgd = kvm->arch.pgd + stage2_pgd_index(addr);
do {
+ /*
+ * Make sure the page table is still active, as another thread
+ * could have possibly freed the page table, while we released
+ * the lock.
+ */
+ if (!READ_ONCE(kvm->arch.pgd))
+ break;
next = stage2_pgd_addr_end(addr, end);
if (!stage2_pgd_none(*pgd))
unmap_stage2_puds(kvm, pgd, addr, next);
@@ -829,22 +836,22 @@ void stage2_unmap_vm(struct kvm *kvm)
* Walks the level-1 page table pointed to by kvm->arch.pgd and frees all
* underlying level-2 and level-3 tables before freeing the actual level-1 table
* and setting the struct pointer to NULL.
- *
- * Note we don't need locking here as this is only called when the VM is
- * destroyed, which can only be done once.
*/
void kvm_free_stage2_pgd(struct kvm *kvm)
{
- if (kvm->arch.pgd == NULL)
- return;
+ void *pgd = NULL;
spin_lock(&kvm->mmu_lock);
- unmap_stage2_range(kvm, 0, KVM_PHYS_SIZE);
+ if (kvm->arch.pgd) {
+ unmap_stage2_range(kvm, 0, KVM_PHYS_SIZE);
+ pgd = READ_ONCE(kvm->arch.pgd);
+ kvm->arch.pgd = NULL;
+ }
spin_unlock(&kvm->mmu_lock);
/* Free the HW pgd, one page at a time */
- free_pages_exact(kvm->arch.pgd, S2_PGD_SIZE);
- kvm->arch.pgd = NULL;
+ if (pgd)
+ free_pages_exact(pgd, S2_PGD_SIZE);
}
static pud_t *stage2_get_pud(struct kvm *kvm, struct kvm_mmu_memory_cache *cache,
@@ -872,6 +879,9 @@ static pmd_t *stage2_get_pmd(struct kvm *kvm, struct kvm_mmu_memory_cache *cache
pmd_t *pmd;
pud = stage2_get_pud(kvm, cache, addr);
+ if (!pud)
+ return NULL;
+
if (stage2_pud_none(*pud)) {
if (!cache)
return NULL;
@@ -1170,11 +1180,13 @@ static void stage2_wp_range(struct kvm *kvm, phys_addr_t addr, phys_addr_t end)
* large. Otherwise, we may see kernel panics with
* CONFIG_DETECT_HUNG_TASK, CONFIG_LOCKUP_DETECTOR,
* CONFIG_LOCKDEP. Additionally, holding the lock too long
- * will also starve other vCPUs.
+ * will also starve other vCPUs. We have to also make sure
+ * that the page tables are not freed while we released
+ * the lock.
*/
- if (need_resched() || spin_needbreak(&kvm->mmu_lock))
- cond_resched_lock(&kvm->mmu_lock);
-
+ cond_resched_lock(&kvm->mmu_lock);
+ if (!READ_ONCE(kvm->arch.pgd))
+ break;
next = stage2_pgd_addr_end(addr, end);
if (stage2_pgd_present(*pgd))
stage2_wp_puds(pgd, addr, next);
diff --git a/virt/kvm/arm/vgic/vgic-init.c b/virt/kvm/arm/vgic/vgic-init.c
index dc68e2e424ab..3a0b8999f011 100644
--- a/virt/kvm/arm/vgic/vgic-init.c
+++ b/virt/kvm/arm/vgic/vgic-init.c
@@ -242,8 +242,11 @@ int kvm_vgic_vcpu_init(struct kvm_vcpu *vcpu)
* If we are creating a VCPU with a GICv3 we must also register the
* KVM io device for the redistributor that belongs to this VCPU.
*/
- if (dist->vgic_model == KVM_DEV_TYPE_ARM_VGIC_V3)
+ if (dist->vgic_model == KVM_DEV_TYPE_ARM_VGIC_V3) {
+ mutex_lock(&vcpu->kvm->lock);
ret = vgic_register_redist_iodev(vcpu);
+ mutex_unlock(&vcpu->kvm->lock);
+ }
return ret;
}
diff --git a/virt/kvm/arm/vgic/vgic-mmio-v2.c b/virt/kvm/arm/vgic/vgic-mmio-v2.c
index 8bafe9af3205..37522e65eb53 100644
--- a/virt/kvm/arm/vgic/vgic-mmio-v2.c
+++ b/virt/kvm/arm/vgic/vgic-mmio-v2.c
@@ -226,7 +226,13 @@ static unsigned long vgic_mmio_read_vcpuif(struct kvm_vcpu *vcpu,
switch (addr & 0xff) {
case GIC_CPU_CTRL:
- val = vmcr.ctlr;
+ val = vmcr.grpen0 << GIC_CPU_CTRL_EnableGrp0_SHIFT;
+ val |= vmcr.grpen1 << GIC_CPU_CTRL_EnableGrp1_SHIFT;
+ val |= vmcr.ackctl << GIC_CPU_CTRL_AckCtl_SHIFT;
+ val |= vmcr.fiqen << GIC_CPU_CTRL_FIQEn_SHIFT;
+ val |= vmcr.cbpr << GIC_CPU_CTRL_CBPR_SHIFT;
+ val |= vmcr.eoim << GIC_CPU_CTRL_EOImodeNS_SHIFT;
+
break;
case GIC_CPU_PRIMASK:
/*
@@ -267,7 +273,13 @@ static void vgic_mmio_write_vcpuif(struct kvm_vcpu *vcpu,
switch (addr & 0xff) {
case GIC_CPU_CTRL:
- vmcr.ctlr = val;
+ vmcr.grpen0 = !!(val & GIC_CPU_CTRL_EnableGrp0);
+ vmcr.grpen1 = !!(val & GIC_CPU_CTRL_EnableGrp1);
+ vmcr.ackctl = !!(val & GIC_CPU_CTRL_AckCtl);
+ vmcr.fiqen = !!(val & GIC_CPU_CTRL_FIQEn);
+ vmcr.cbpr = !!(val & GIC_CPU_CTRL_CBPR);
+ vmcr.eoim = !!(val & GIC_CPU_CTRL_EOImodeNS);
+
break;
case GIC_CPU_PRIMASK:
/*
diff --git a/virt/kvm/arm/vgic/vgic-mmio-v3.c b/virt/kvm/arm/vgic/vgic-mmio-v3.c
index e25567a93dd5..714fa3933546 100644
--- a/virt/kvm/arm/vgic/vgic-mmio-v3.c
+++ b/virt/kvm/arm/vgic/vgic-mmio-v3.c
@@ -590,7 +590,7 @@ int vgic_register_redist_iodev(struct kvm_vcpu *vcpu)
if (!vgic_v3_check_base(kvm))
return -EINVAL;
- rd_base = vgic->vgic_redist_base + kvm_vcpu_get_idx(vcpu) * SZ_64K * 2;
+ rd_base = vgic->vgic_redist_base + vgic->vgic_redist_free_offset;
sgi_base = rd_base + SZ_64K;
kvm_iodevice_init(&rd_dev->dev, &kvm_io_gic_ops);
@@ -618,11 +618,15 @@ int vgic_register_redist_iodev(struct kvm_vcpu *vcpu)
mutex_lock(&kvm->slots_lock);
ret = kvm_io_bus_register_dev(kvm, KVM_MMIO_BUS, sgi_base,
SZ_64K, &sgi_dev->dev);
- mutex_unlock(&kvm->slots_lock);
- if (ret)
+ if (ret) {
kvm_io_bus_unregister_dev(kvm, KVM_MMIO_BUS,
&rd_dev->dev);
+ goto out;
+ }
+ vgic->vgic_redist_free_offset += 2 * SZ_64K;
+out:
+ mutex_unlock(&kvm->slots_lock);
return ret;
}
@@ -648,10 +652,12 @@ static int vgic_register_all_redist_iodevs(struct kvm *kvm)
if (ret) {
/* The current c failed, so we start with the previous one. */
+ mutex_lock(&kvm->slots_lock);
for (c--; c >= 0; c--) {
vcpu = kvm_get_vcpu(kvm, c);
vgic_unregister_redist_iodev(vcpu);
}
+ mutex_unlock(&kvm->slots_lock);
}
return ret;
diff --git a/virt/kvm/arm/vgic/vgic-v2.c b/virt/kvm/arm/vgic/vgic-v2.c
index a65757aab6d3..e4187e52bb26 100644
--- a/virt/kvm/arm/vgic/vgic-v2.c
+++ b/virt/kvm/arm/vgic/vgic-v2.c
@@ -149,6 +149,13 @@ void vgic_v2_populate_lr(struct kvm_vcpu *vcpu, struct vgic_irq *irq, int lr)
if (irq->hw) {
val |= GICH_LR_HW;
val |= irq->hwintid << GICH_LR_PHYSID_CPUID_SHIFT;
+ /*
+ * Never set pending+active on a HW interrupt, as the
+ * pending state is kept at the physical distributor
+ * level.
+ */
+ if (irq->active && irq_is_pending(irq))
+ val &= ~GICH_LR_PENDING_BIT;
} else {
if (irq->config == VGIC_CONFIG_LEVEL)
val |= GICH_LR_EOI;
@@ -170,7 +177,18 @@ void vgic_v2_set_vmcr(struct kvm_vcpu *vcpu, struct vgic_vmcr *vmcrp)
struct vgic_v2_cpu_if *cpu_if = &vcpu->arch.vgic_cpu.vgic_v2;
u32 vmcr;
- vmcr = (vmcrp->ctlr << GICH_VMCR_CTRL_SHIFT) & GICH_VMCR_CTRL_MASK;
+ vmcr = (vmcrp->grpen0 << GICH_VMCR_ENABLE_GRP0_SHIFT) &
+ GICH_VMCR_ENABLE_GRP0_MASK;
+ vmcr |= (vmcrp->grpen1 << GICH_VMCR_ENABLE_GRP1_SHIFT) &
+ GICH_VMCR_ENABLE_GRP1_MASK;
+ vmcr |= (vmcrp->ackctl << GICH_VMCR_ACK_CTL_SHIFT) &
+ GICH_VMCR_ACK_CTL_MASK;
+ vmcr |= (vmcrp->fiqen << GICH_VMCR_FIQ_EN_SHIFT) &
+ GICH_VMCR_FIQ_EN_MASK;
+ vmcr |= (vmcrp->cbpr << GICH_VMCR_CBPR_SHIFT) &
+ GICH_VMCR_CBPR_MASK;
+ vmcr |= (vmcrp->eoim << GICH_VMCR_EOI_MODE_SHIFT) &
+ GICH_VMCR_EOI_MODE_MASK;
vmcr |= (vmcrp->abpr << GICH_VMCR_ALIAS_BINPOINT_SHIFT) &
GICH_VMCR_ALIAS_BINPOINT_MASK;
vmcr |= (vmcrp->bpr << GICH_VMCR_BINPOINT_SHIFT) &
@@ -188,8 +206,19 @@ void vgic_v2_get_vmcr(struct kvm_vcpu *vcpu, struct vgic_vmcr *vmcrp)
vmcr = cpu_if->vgic_vmcr;
- vmcrp->ctlr = (vmcr & GICH_VMCR_CTRL_MASK) >>
- GICH_VMCR_CTRL_SHIFT;
+ vmcrp->grpen0 = (vmcr & GICH_VMCR_ENABLE_GRP0_MASK) >>
+ GICH_VMCR_ENABLE_GRP0_SHIFT;
+ vmcrp->grpen1 = (vmcr & GICH_VMCR_ENABLE_GRP1_MASK) >>
+ GICH_VMCR_ENABLE_GRP1_SHIFT;
+ vmcrp->ackctl = (vmcr & GICH_VMCR_ACK_CTL_MASK) >>
+ GICH_VMCR_ACK_CTL_SHIFT;
+ vmcrp->fiqen = (vmcr & GICH_VMCR_FIQ_EN_MASK) >>
+ GICH_VMCR_FIQ_EN_SHIFT;
+ vmcrp->cbpr = (vmcr & GICH_VMCR_CBPR_MASK) >>
+ GICH_VMCR_CBPR_SHIFT;
+ vmcrp->eoim = (vmcr & GICH_VMCR_EOI_MODE_MASK) >>
+ GICH_VMCR_EOI_MODE_SHIFT;
+
vmcrp->abpr = (vmcr & GICH_VMCR_ALIAS_BINPOINT_MASK) >>
GICH_VMCR_ALIAS_BINPOINT_SHIFT;
vmcrp->bpr = (vmcr & GICH_VMCR_BINPOINT_MASK) >>
diff --git a/virt/kvm/arm/vgic/vgic-v3.c b/virt/kvm/arm/vgic/vgic-v3.c
index 8fa737edde6f..030248e669f6 100644
--- a/virt/kvm/arm/vgic/vgic-v3.c
+++ b/virt/kvm/arm/vgic/vgic-v3.c
@@ -127,6 +127,13 @@ void vgic_v3_populate_lr(struct kvm_vcpu *vcpu, struct vgic_irq *irq, int lr)
if (irq->hw) {
val |= ICH_LR_HW;
val |= ((u64)irq->hwintid) << ICH_LR_PHYS_ID_SHIFT;
+ /*
+ * Never set pending+active on a HW interrupt, as the
+ * pending state is kept at the physical distributor
+ * level.
+ */
+ if (irq->active && irq_is_pending(irq))
+ val &= ~ICH_LR_PENDING_BIT;
} else {
if (irq->config == VGIC_CONFIG_LEVEL)
val |= ICH_LR_EOI;
@@ -152,15 +159,24 @@ void vgic_v3_clear_lr(struct kvm_vcpu *vcpu, int lr)
void vgic_v3_set_vmcr(struct kvm_vcpu *vcpu, struct vgic_vmcr *vmcrp)
{
struct vgic_v3_cpu_if *cpu_if = &vcpu->arch.vgic_cpu.vgic_v3;
+ u32 model = vcpu->kvm->arch.vgic.vgic_model;
u32 vmcr;
- /*
- * Ignore the FIQen bit, because GIC emulation always implies
- * SRE=1 which means the vFIQEn bit is also RES1.
- */
- vmcr = ((vmcrp->ctlr >> ICC_CTLR_EL1_EOImode_SHIFT) <<
- ICH_VMCR_EOIM_SHIFT) & ICH_VMCR_EOIM_MASK;
- vmcr |= (vmcrp->ctlr << ICH_VMCR_CBPR_SHIFT) & ICH_VMCR_CBPR_MASK;
+ if (model == KVM_DEV_TYPE_ARM_VGIC_V2) {
+ vmcr = (vmcrp->ackctl << ICH_VMCR_ACK_CTL_SHIFT) &
+ ICH_VMCR_ACK_CTL_MASK;
+ vmcr |= (vmcrp->fiqen << ICH_VMCR_FIQ_EN_SHIFT) &
+ ICH_VMCR_FIQ_EN_MASK;
+ } else {
+ /*
+ * When emulating GICv3 on GICv3 with SRE=1 on the
+ * VFIQEn bit is RES1 and the VAckCtl bit is RES0.
+ */
+ vmcr = ICH_VMCR_FIQ_EN_MASK;
+ }
+
+ vmcr |= (vmcrp->cbpr << ICH_VMCR_CBPR_SHIFT) & ICH_VMCR_CBPR_MASK;
+ vmcr |= (vmcrp->eoim << ICH_VMCR_EOIM_SHIFT) & ICH_VMCR_EOIM_MASK;
vmcr |= (vmcrp->abpr << ICH_VMCR_BPR1_SHIFT) & ICH_VMCR_BPR1_MASK;
vmcr |= (vmcrp->bpr << ICH_VMCR_BPR0_SHIFT) & ICH_VMCR_BPR0_MASK;
vmcr |= (vmcrp->pmr << ICH_VMCR_PMR_SHIFT) & ICH_VMCR_PMR_MASK;
@@ -173,17 +189,27 @@ void vgic_v3_set_vmcr(struct kvm_vcpu *vcpu, struct vgic_vmcr *vmcrp)
void vgic_v3_get_vmcr(struct kvm_vcpu *vcpu, struct vgic_vmcr *vmcrp)
{
struct vgic_v3_cpu_if *cpu_if = &vcpu->arch.vgic_cpu.vgic_v3;
+ u32 model = vcpu->kvm->arch.vgic.vgic_model;
u32 vmcr;
vmcr = cpu_if->vgic_vmcr;
- /*
- * Ignore the FIQen bit, because GIC emulation always implies
- * SRE=1 which means the vFIQEn bit is also RES1.
- */
- vmcrp->ctlr = ((vmcr >> ICH_VMCR_EOIM_SHIFT) <<
- ICC_CTLR_EL1_EOImode_SHIFT) & ICC_CTLR_EL1_EOImode_MASK;
- vmcrp->ctlr |= (vmcr & ICH_VMCR_CBPR_MASK) >> ICH_VMCR_CBPR_SHIFT;
+ if (model == KVM_DEV_TYPE_ARM_VGIC_V2) {
+ vmcrp->ackctl = (vmcr & ICH_VMCR_ACK_CTL_MASK) >>
+ ICH_VMCR_ACK_CTL_SHIFT;
+ vmcrp->fiqen = (vmcr & ICH_VMCR_FIQ_EN_MASK) >>
+ ICH_VMCR_FIQ_EN_SHIFT;
+ } else {
+ /*
+ * When emulating GICv3 on GICv3 with SRE=1 on the
+ * VFIQEn bit is RES1 and the VAckCtl bit is RES0.
+ */
+ vmcrp->fiqen = 1;
+ vmcrp->ackctl = 0;
+ }
+
+ vmcrp->cbpr = (vmcr & ICH_VMCR_CBPR_MASK) >> ICH_VMCR_CBPR_SHIFT;
+ vmcrp->eoim = (vmcr & ICH_VMCR_EOIM_MASK) >> ICH_VMCR_EOIM_SHIFT;
vmcrp->abpr = (vmcr & ICH_VMCR_BPR1_MASK) >> ICH_VMCR_BPR1_SHIFT;
vmcrp->bpr = (vmcr & ICH_VMCR_BPR0_MASK) >> ICH_VMCR_BPR0_SHIFT;
vmcrp->pmr = (vmcr & ICH_VMCR_PMR_MASK) >> ICH_VMCR_PMR_SHIFT;
diff --git a/virt/kvm/arm/vgic/vgic.h b/virt/kvm/arm/vgic/vgic.h
index da83e4caa272..bba7fa22a7f7 100644
--- a/virt/kvm/arm/vgic/vgic.h
+++ b/virt/kvm/arm/vgic/vgic.h
@@ -111,14 +111,18 @@ static inline bool irq_is_pending(struct vgic_irq *irq)
* registers regardless of the hardware backed GIC used.
*/
struct vgic_vmcr {
- u32 ctlr;
+ u32 grpen0;
+ u32 grpen1;
+
+ u32 ackctl;
+ u32 fiqen;
+ u32 cbpr;
+ u32 eoim;
+
u32 abpr;
u32 bpr;
u32 pmr; /* Priority mask field in the GICC_PMR and
* ICC_PMR_EL1 priority field format */
- /* Below member variable are valid only for GICv3 */
- u32 grpen0;
- u32 grpen1;
};
struct vgic_reg_attr {