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-rw-r--r--arch/arm64/kvm/arch_timer.c162
-rw-r--r--arch/arm64/kvm/hyp/hyp-entry.S6
-rw-r--r--arch/arm64/kvm/vgic/vgic-init.c36
-rw-r--r--arch/arm64/kvm/vgic/vgic-v2.c19
-rw-r--r--arch/arm64/kvm/vgic/vgic-v3.c19
-rw-r--r--arch/arm64/kvm/vgic/vgic.c14
-rw-r--r--drivers/irqchip/irq-apple-aic.c9
-rw-r--r--drivers/irqchip/irq-gic-common.c13
-rw-r--r--drivers/irqchip/irq-gic-common.h2
-rw-r--r--drivers/irqchip/irq-gic-v3.c6
-rw-r--r--drivers/irqchip/irq-gic.c6
-rw-r--r--include/kvm/arm_vgic.h41
-rw-r--r--include/linux/irqchip/arm-gic-common.h25
-rw-r--r--include/linux/irqchip/arm-vgic-info.h45
14 files changed, 299 insertions, 104 deletions
diff --git a/arch/arm64/kvm/arch_timer.c b/arch/arm64/kvm/arch_timer.c
index 74e0699661e9..3df67c127489 100644
--- a/arch/arm64/kvm/arch_timer.c
+++ b/arch/arm64/kvm/arch_timer.c
@@ -9,6 +9,7 @@
#include <linux/kvm_host.h>
#include <linux/interrupt.h>
#include <linux/irq.h>
+#include <linux/irqdomain.h>
#include <linux/uaccess.h>
#include <clocksource/arm_arch_timer.h>
@@ -973,36 +974,154 @@ static int kvm_timer_dying_cpu(unsigned int cpu)
return 0;
}
-int kvm_timer_hyp_init(bool has_gic)
+static int timer_irq_set_vcpu_affinity(struct irq_data *d, void *vcpu)
{
- struct arch_timer_kvm_info *info;
- int err;
+ if (vcpu)
+ irqd_set_forwarded_to_vcpu(d);
+ else
+ irqd_clr_forwarded_to_vcpu(d);
- info = arch_timer_get_kvm_info();
- timecounter = &info->timecounter;
+ return 0;
+}
- if (!timecounter->cc) {
- kvm_err("kvm_arch_timer: uninitialized timecounter\n");
- return -ENODEV;
+static int timer_irq_set_irqchip_state(struct irq_data *d,
+ enum irqchip_irq_state which, bool val)
+{
+ if (which != IRQCHIP_STATE_ACTIVE || !irqd_is_forwarded_to_vcpu(d))
+ return irq_chip_set_parent_state(d, which, val);
+
+ if (val)
+ irq_chip_mask_parent(d);
+ else
+ irq_chip_unmask_parent(d);
+
+ return 0;
+}
+
+static void timer_irq_eoi(struct irq_data *d)
+{
+ if (!irqd_is_forwarded_to_vcpu(d))
+ irq_chip_eoi_parent(d);
+}
+
+static void timer_irq_ack(struct irq_data *d)
+{
+ d = d->parent_data;
+ if (d->chip->irq_ack)
+ d->chip->irq_ack(d);
+}
+
+static struct irq_chip timer_chip = {
+ .name = "KVM",
+ .irq_ack = timer_irq_ack,
+ .irq_mask = irq_chip_mask_parent,
+ .irq_unmask = irq_chip_unmask_parent,
+ .irq_eoi = timer_irq_eoi,
+ .irq_set_type = irq_chip_set_type_parent,
+ .irq_set_vcpu_affinity = timer_irq_set_vcpu_affinity,
+ .irq_set_irqchip_state = timer_irq_set_irqchip_state,
+};
+
+static int timer_irq_domain_alloc(struct irq_domain *domain, unsigned int virq,
+ unsigned int nr_irqs, void *arg)
+{
+ irq_hw_number_t hwirq = (uintptr_t)arg;
+
+ return irq_domain_set_hwirq_and_chip(domain, virq, hwirq,
+ &timer_chip, NULL);
+}
+
+static void timer_irq_domain_free(struct irq_domain *domain, unsigned int virq,
+ unsigned int nr_irqs)
+{
+}
+
+static const struct irq_domain_ops timer_domain_ops = {
+ .alloc = timer_irq_domain_alloc,
+ .free = timer_irq_domain_free,
+};
+
+static struct irq_ops arch_timer_irq_ops = {
+ .get_input_level = kvm_arch_timer_get_input_level,
+};
+
+static void kvm_irq_fixup_flags(unsigned int virq, u32 *flags)
+{
+ *flags = irq_get_trigger_type(virq);
+ if (*flags != IRQF_TRIGGER_HIGH && *flags != IRQF_TRIGGER_LOW) {
+ kvm_err("Invalid trigger for timer IRQ%d, assuming level low\n",
+ virq);
+ *flags = IRQF_TRIGGER_LOW;
}
+}
- /* First, do the virtual EL1 timer irq */
+static int kvm_irq_init(struct arch_timer_kvm_info *info)
+{
+ struct irq_domain *domain = NULL;
if (info->virtual_irq <= 0) {
kvm_err("kvm_arch_timer: invalid virtual timer IRQ: %d\n",
info->virtual_irq);
return -ENODEV;
}
+
host_vtimer_irq = info->virtual_irq;
+ kvm_irq_fixup_flags(host_vtimer_irq, &host_vtimer_irq_flags);
+
+ if (kvm_vgic_global_state.no_hw_deactivation) {
+ struct fwnode_handle *fwnode;
+ struct irq_data *data;
+
+ fwnode = irq_domain_alloc_named_fwnode("kvm-timer");
+ if (!fwnode)
+ return -ENOMEM;
+
+ /* Assume both vtimer and ptimer in the same parent */
+ data = irq_get_irq_data(host_vtimer_irq);
+ domain = irq_domain_create_hierarchy(data->domain, 0,
+ NR_KVM_TIMERS, fwnode,
+ &timer_domain_ops, NULL);
+ if (!domain) {
+ irq_domain_free_fwnode(fwnode);
+ return -ENOMEM;
+ }
+
+ arch_timer_irq_ops.flags |= VGIC_IRQ_SW_RESAMPLE;
+ WARN_ON(irq_domain_push_irq(domain, host_vtimer_irq,
+ (void *)TIMER_VTIMER));
+ }
- host_vtimer_irq_flags = irq_get_trigger_type(host_vtimer_irq);
- if (host_vtimer_irq_flags != IRQF_TRIGGER_HIGH &&
- host_vtimer_irq_flags != IRQF_TRIGGER_LOW) {
- kvm_err("Invalid trigger for vtimer IRQ%d, assuming level low\n",
- host_vtimer_irq);
- host_vtimer_irq_flags = IRQF_TRIGGER_LOW;
+ if (info->physical_irq > 0) {
+ host_ptimer_irq = info->physical_irq;
+ kvm_irq_fixup_flags(host_ptimer_irq, &host_ptimer_irq_flags);
+
+ if (domain)
+ WARN_ON(irq_domain_push_irq(domain, host_ptimer_irq,
+ (void *)TIMER_PTIMER));
}
+ return 0;
+}
+
+int kvm_timer_hyp_init(bool has_gic)
+{
+ struct arch_timer_kvm_info *info;
+ int err;
+
+ info = arch_timer_get_kvm_info();
+ timecounter = &info->timecounter;
+
+ if (!timecounter->cc) {
+ kvm_err("kvm_arch_timer: uninitialized timecounter\n");
+ return -ENODEV;
+ }
+
+ err = kvm_irq_init(info);
+ if (err)
+ return err;
+
+ /* First, do the virtual EL1 timer irq */
+
err = request_percpu_irq(host_vtimer_irq, kvm_arch_timer_handler,
"kvm guest vtimer", kvm_get_running_vcpus());
if (err) {
@@ -1027,15 +1146,6 @@ int kvm_timer_hyp_init(bool has_gic)
/* Now let's do the physical EL1 timer irq */
if (info->physical_irq > 0) {
- host_ptimer_irq = info->physical_irq;
- host_ptimer_irq_flags = irq_get_trigger_type(host_ptimer_irq);
- if (host_ptimer_irq_flags != IRQF_TRIGGER_HIGH &&
- host_ptimer_irq_flags != IRQF_TRIGGER_LOW) {
- kvm_err("Invalid trigger for ptimer IRQ%d, assuming level low\n",
- host_ptimer_irq);
- host_ptimer_irq_flags = IRQF_TRIGGER_LOW;
- }
-
err = request_percpu_irq(host_ptimer_irq, kvm_arch_timer_handler,
"kvm guest ptimer", kvm_get_running_vcpus());
if (err) {
@@ -1143,7 +1253,7 @@ int kvm_timer_enable(struct kvm_vcpu *vcpu)
ret = kvm_vgic_map_phys_irq(vcpu,
map.direct_vtimer->host_timer_irq,
map.direct_vtimer->irq.irq,
- kvm_arch_timer_get_input_level);
+ &arch_timer_irq_ops);
if (ret)
return ret;
@@ -1151,7 +1261,7 @@ int kvm_timer_enable(struct kvm_vcpu *vcpu)
ret = kvm_vgic_map_phys_irq(vcpu,
map.direct_ptimer->host_timer_irq,
map.direct_ptimer->irq.irq,
- kvm_arch_timer_get_input_level);
+ &arch_timer_irq_ops);
}
if (ret)
diff --git a/arch/arm64/kvm/hyp/hyp-entry.S b/arch/arm64/kvm/hyp/hyp-entry.S
index 5f49df4ffdd8..9aa9b73475c9 100644
--- a/arch/arm64/kvm/hyp/hyp-entry.S
+++ b/arch/arm64/kvm/hyp/hyp-entry.S
@@ -76,6 +76,7 @@ el1_trap:
b __guest_exit
el1_irq:
+el1_fiq:
get_vcpu_ptr x1, x0
mov x0, #ARM_EXCEPTION_IRQ
b __guest_exit
@@ -131,7 +132,6 @@ SYM_CODE_END(\label)
invalid_vector el2t_error_invalid
invalid_vector el2h_irq_invalid
invalid_vector el2h_fiq_invalid
- invalid_vector el1_fiq_invalid
.ltorg
@@ -179,12 +179,12 @@ SYM_CODE_START(__kvm_hyp_vector)
valid_vect el1_sync // Synchronous 64-bit EL1
valid_vect el1_irq // IRQ 64-bit EL1
- invalid_vect el1_fiq_invalid // FIQ 64-bit EL1
+ valid_vect el1_fiq // FIQ 64-bit EL1
valid_vect el1_error // Error 64-bit EL1
valid_vect el1_sync // Synchronous 32-bit EL1
valid_vect el1_irq // IRQ 32-bit EL1
- invalid_vect el1_fiq_invalid // FIQ 32-bit EL1
+ valid_vect el1_fiq // FIQ 32-bit EL1
valid_vect el1_error // Error 32-bit EL1
SYM_CODE_END(__kvm_hyp_vector)
diff --git a/arch/arm64/kvm/vgic/vgic-init.c b/arch/arm64/kvm/vgic/vgic-init.c
index 58cbda00e56d..340c51d87677 100644
--- a/arch/arm64/kvm/vgic/vgic-init.c
+++ b/arch/arm64/kvm/vgic/vgic-init.c
@@ -482,6 +482,16 @@ static irqreturn_t vgic_maintenance_handler(int irq, void *data)
return IRQ_HANDLED;
}
+static struct gic_kvm_info *gic_kvm_info;
+
+void __init vgic_set_kvm_info(const struct gic_kvm_info *info)
+{
+ BUG_ON(gic_kvm_info != NULL);
+ gic_kvm_info = kmalloc(sizeof(*info), GFP_KERNEL);
+ if (gic_kvm_info)
+ *gic_kvm_info = *info;
+}
+
/**
* kvm_vgic_init_cpu_hardware - initialize the GIC VE hardware
*
@@ -509,18 +519,29 @@ void kvm_vgic_init_cpu_hardware(void)
*/
int kvm_vgic_hyp_init(void)
{
- const struct gic_kvm_info *gic_kvm_info;
+ bool has_mask;
int ret;
- gic_kvm_info = gic_get_kvm_info();
if (!gic_kvm_info)
return -ENODEV;
- if (!gic_kvm_info->maint_irq) {
+ has_mask = !gic_kvm_info->no_maint_irq_mask;
+
+ if (has_mask && !gic_kvm_info->maint_irq) {
kvm_err("No vgic maintenance irq\n");
return -ENXIO;
}
+ /*
+ * If we get one of these oddball non-GICs, taint the kernel,
+ * as we have no idea of how they *really* behave.
+ */
+ if (gic_kvm_info->no_hw_deactivation) {
+ kvm_info("Non-architectural vgic, tainting kernel\n");
+ add_taint(TAINT_CPU_OUT_OF_SPEC, LOCKDEP_STILL_OK);
+ kvm_vgic_global_state.no_hw_deactivation = true;
+ }
+
switch (gic_kvm_info->type) {
case GIC_V2:
ret = vgic_v2_probe(gic_kvm_info);
@@ -536,10 +557,17 @@ int kvm_vgic_hyp_init(void)
ret = -ENODEV;
}
+ kvm_vgic_global_state.maint_irq = gic_kvm_info->maint_irq;
+
+ kfree(gic_kvm_info);
+ gic_kvm_info = NULL;
+
if (ret)
return ret;
- kvm_vgic_global_state.maint_irq = gic_kvm_info->maint_irq;
+ if (!has_mask)
+ return 0;
+
ret = request_percpu_irq(kvm_vgic_global_state.maint_irq,
vgic_maintenance_handler,
"vgic", kvm_get_running_vcpus());
diff --git a/arch/arm64/kvm/vgic/vgic-v2.c b/arch/arm64/kvm/vgic/vgic-v2.c
index 11934c2af2f4..2c580204f1dc 100644
--- a/arch/arm64/kvm/vgic/vgic-v2.c
+++ b/arch/arm64/kvm/vgic/vgic-v2.c
@@ -108,11 +108,22 @@ void vgic_v2_fold_lr_state(struct kvm_vcpu *vcpu)
* If this causes us to lower the level, we have to also clear
* the physical active state, since we will otherwise never be
* told when the interrupt becomes asserted again.
+ *
+ * Another case is when the interrupt requires a helping hand
+ * on deactivation (no HW deactivation, for example).
*/
- if (vgic_irq_is_mapped_level(irq) && (val & GICH_LR_PENDING_BIT)) {
- irq->line_level = vgic_get_phys_line_level(irq);
+ if (vgic_irq_is_mapped_level(irq)) {
+ bool resample = false;
+
+ if (val & GICH_LR_PENDING_BIT) {
+ irq->line_level = vgic_get_phys_line_level(irq);
+ resample = !irq->line_level;
+ } else if (vgic_irq_needs_resampling(irq) &&
+ !(irq->active || irq->pending_latch)) {
+ resample = true;
+ }
- if (!irq->line_level)
+ if (resample)
vgic_irq_set_phys_active(irq, false);
}
@@ -152,7 +163,7 @@ void vgic_v2_populate_lr(struct kvm_vcpu *vcpu, struct vgic_irq *irq, int lr)
if (irq->group)
val |= GICH_LR_GROUP1;
- if (irq->hw) {
+ if (irq->hw && !vgic_irq_needs_resampling(irq)) {
val |= GICH_LR_HW;
val |= irq->hwintid << GICH_LR_PHYSID_CPUID_SHIFT;
/*
diff --git a/arch/arm64/kvm/vgic/vgic-v3.c b/arch/arm64/kvm/vgic/vgic-v3.c
index 41ecf219c333..66004f61cd83 100644
--- a/arch/arm64/kvm/vgic/vgic-v3.c
+++ b/arch/arm64/kvm/vgic/vgic-v3.c
@@ -101,11 +101,22 @@ void vgic_v3_fold_lr_state(struct kvm_vcpu *vcpu)
* If this causes us to lower the level, we have to also clear
* the physical active state, since we will otherwise never be
* told when the interrupt becomes asserted again.
+ *
+ * Another case is when the interrupt requires a helping hand
+ * on deactivation (no HW deactivation, for example).
*/
- if (vgic_irq_is_mapped_level(irq) && (val & ICH_LR_PENDING_BIT)) {
- irq->line_level = vgic_get_phys_line_level(irq);
+ if (vgic_irq_is_mapped_level(irq)) {
+ bool resample = false;
+
+ if (val & ICH_LR_PENDING_BIT) {
+ irq->line_level = vgic_get_phys_line_level(irq);
+ resample = !irq->line_level;
+ } else if (vgic_irq_needs_resampling(irq) &&
+ !(irq->active || irq->pending_latch)) {
+ resample = true;
+ }
- if (!irq->line_level)
+ if (resample)
vgic_irq_set_phys_active(irq, false);
}
@@ -136,7 +147,7 @@ void vgic_v3_populate_lr(struct kvm_vcpu *vcpu, struct vgic_irq *irq, int lr)
}
}
- if (irq->hw) {
+ if (irq->hw && !vgic_irq_needs_resampling(irq)) {
val |= ICH_LR_HW;
val |= ((u64)irq->hwintid) << ICH_LR_PHYS_ID_SHIFT;
/*
diff --git a/arch/arm64/kvm/vgic/vgic.c b/arch/arm64/kvm/vgic/vgic.c
index 15b666200f0b..111bff47e471 100644
--- a/arch/arm64/kvm/vgic/vgic.c
+++ b/arch/arm64/kvm/vgic/vgic.c
@@ -182,8 +182,8 @@ bool vgic_get_phys_line_level(struct vgic_irq *irq)
BUG_ON(!irq->hw);
- if (irq->get_input_level)
- return irq->get_input_level(irq->intid);
+ if (irq->ops && irq->ops->get_input_level)
+ return irq->ops->get_input_level(irq->intid);
WARN_ON(irq_get_irqchip_state(irq->host_irq,
IRQCHIP_STATE_PENDING,
@@ -480,7 +480,7 @@ int kvm_vgic_inject_irq(struct kvm *kvm, int cpuid, unsigned int intid,
/* @irq->irq_lock must be held */
static int kvm_vgic_map_irq(struct kvm_vcpu *vcpu, struct vgic_irq *irq,
unsigned int host_irq,
- bool (*get_input_level)(int vindid))
+ struct irq_ops *ops)
{
struct irq_desc *desc;
struct irq_data *data;
@@ -500,7 +500,7 @@ static int kvm_vgic_map_irq(struct kvm_vcpu *vcpu, struct vgic_irq *irq,
irq->hw = true;
irq->host_irq = host_irq;
irq->hwintid = data->hwirq;
- irq->get_input_level = get_input_level;
+ irq->ops = ops;
return 0;
}
@@ -509,11 +509,11 @@ static inline void kvm_vgic_unmap_irq(struct vgic_irq *irq)
{
irq->hw = false;
irq->hwintid = 0;
- irq->get_input_level = NULL;
+ irq->ops = NULL;
}
int kvm_vgic_map_phys_irq(struct kvm_vcpu *vcpu, unsigned int host_irq,
- u32 vintid, bool (*get_input_level)(int vindid))
+ u32 vintid, struct irq_ops *ops)
{
struct vgic_irq *irq = vgic_get_irq(vcpu->kvm, vcpu, vintid);
unsigned long flags;
@@ -522,7 +522,7 @@ int kvm_vgic_map_phys_irq(struct kvm_vcpu *vcpu, unsigned int host_irq,
BUG_ON(!irq);
raw_spin_lock_irqsave(&irq->irq_lock, flags);
- ret = kvm_vgic_map_irq(vcpu, irq, host_irq, get_input_level);
+ ret = kvm_vgic_map_irq(vcpu, irq, host_irq, ops);
raw_spin_unlock_irqrestore(&irq->irq_lock, flags);
vgic_put_irq(vcpu->kvm, irq);
diff --git a/drivers/irqchip/irq-apple-aic.c b/drivers/irqchip/irq-apple-aic.c
index c179e27062fd..b8c06bd8659e 100644
--- a/drivers/irqchip/irq-apple-aic.c
+++ b/drivers/irqchip/irq-apple-aic.c
@@ -50,6 +50,7 @@
#include <linux/cpuhotplug.h>
#include <linux/io.h>
#include <linux/irqchip.h>
+#include <linux/irqchip/arm-vgic-info.h>
#include <linux/irqdomain.h>
#include <linux/limits.h>
#include <linux/of_address.h>
@@ -787,6 +788,12 @@ static int aic_init_cpu(unsigned int cpu)
return 0;
}
+static struct gic_kvm_info vgic_info __initdata = {
+ .type = GIC_V3,
+ .no_maint_irq_mask = true,
+ .no_hw_deactivation = true,
+};
+
static int __init aic_of_ic_init(struct device_node *node, struct device_node *parent)
{
int i;
@@ -843,6 +850,8 @@ static int __init aic_of_ic_init(struct device_node *node, struct device_node *p
"irqchip/apple-aic/ipi:starting",
aic_init_cpu, NULL);
+ vgic_set_kvm_info(&vgic_info);
+
pr_info("Initialized with %d IRQs, %d FIQs, %d vIPIs\n",
irqc->nr_hw, AIC_NR_FIQ, AIC_NR_SWIPI);
diff --git a/drivers/irqchip/irq-gic-common.c b/drivers/irqchip/irq-gic-common.c
index f47b41dfd023..a610821c8ff2 100644
--- a/drivers/irqchip/irq-gic-common.c
+++ b/drivers/irqchip/irq-gic-common.c
@@ -12,19 +12,6 @@
static DEFINE_RAW_SPINLOCK(irq_controller_lock);
-static const struct gic_kvm_info *gic_kvm_info;
-
-const struct gic_kvm_info *gic_get_kvm_info(void)
-{
- return gic_kvm_info;
-}
-
-void gic_set_kvm_info(const struct gic_kvm_info *info)
-{
- BUG_ON(gic_kvm_info != NULL);
- gic_kvm_info = info;
-}
-
void gic_enable_of_quirks(const struct device_node *np,
const struct gic_quirk *quirks, void *data)
{
diff --git a/drivers/irqchip/irq-gic-common.h b/drivers/irqchip/irq-gic-common.h
index ccba8b0fe0f5..27e3d4ed4f32 100644
--- a/drivers/irqchip/irq-gic-common.h
+++ b/drivers/irqchip/irq-gic-common.h
@@ -28,6 +28,4 @@ void gic_enable_quirks(u32 iidr, const struct gic_quirk *quirks,
void gic_enable_of_quirks(const struct device_node *np,
const struct gic_quirk *quirks, void *data);
-void gic_set_kvm_info(const struct gic_kvm_info *info);
-
#endif /* _IRQ_GIC_COMMON_H */
diff --git a/drivers/irqchip/irq-gic-v3.c b/drivers/irqchip/irq-gic-v3.c
index 37a23aa6de37..453fc425eede 100644
--- a/drivers/irqchip/irq-gic-v3.c
+++ b/drivers/irqchip/irq-gic-v3.c
@@ -103,7 +103,7 @@ EXPORT_SYMBOL(gic_nonsecure_priorities);
/* ppi_nmi_refs[n] == number of cpus having ppi[n + 16] set as NMI */
static refcount_t *ppi_nmi_refs;
-static struct gic_kvm_info gic_v3_kvm_info;
+static struct gic_kvm_info gic_v3_kvm_info __initdata;
static DEFINE_PER_CPU(bool, has_rss);
#define MPIDR_RS(mpidr) (((mpidr) & 0xF0UL) >> 4)
@@ -1852,7 +1852,7 @@ static void __init gic_of_setup_kvm_info(struct device_node *node)
gic_v3_kvm_info.has_v4 = gic_data.rdists.has_vlpis;
gic_v3_kvm_info.has_v4_1 = gic_data.rdists.has_rvpeid;
- gic_set_kvm_info(&gic_v3_kvm_info);
+ vgic_set_kvm_info(&gic_v3_kvm_info);
}
static int __init gic_of_init(struct device_node *node, struct device_node *parent)
@@ -2168,7 +2168,7 @@ static void __init gic_acpi_setup_kvm_info(void)
gic_v3_kvm_info.has_v4 = gic_data.rdists.has_vlpis;
gic_v3_kvm_info.has_v4_1 = gic_data.rdists.has_rvpeid;
- gic_set_kvm_info(&gic_v3_kvm_info);
+ vgic_set_kvm_info(&gic_v3_kvm_info);
}
static int __init
diff --git a/drivers/irqchip/irq-gic.c b/drivers/irqchip/irq-gic.c
index b1d9c22caf2e..2de9ec8ece0c 100644
--- a/drivers/irqchip/irq-gic.c
+++ b/drivers/irqchip/irq-gic.c
@@ -119,7 +119,7 @@ static DEFINE_STATIC_KEY_TRUE(supports_deactivate_key);
static struct gic_chip_data gic_data[CONFIG_ARM_GIC_MAX_NR] __read_mostly;
-static struct gic_kvm_info gic_v2_kvm_info;
+static struct gic_kvm_info gic_v2_kvm_info __initdata;
static DEFINE_PER_CPU(u32, sgi_intid);
@@ -1451,7 +1451,7 @@ static void __init gic_of_setup_kvm_info(struct device_node *node)
return;
if (static_branch_likely(&supports_deactivate_key))
- gic_set_kvm_info(&gic_v2_kvm_info);
+ vgic_set_kvm_info(&gic_v2_kvm_info);
}
int __init
@@ -1618,7 +1618,7 @@ static void __init gic_acpi_setup_kvm_info(void)
gic_v2_kvm_info.maint_irq = irq;
- gic_set_kvm_info(&gic_v2_kvm_info);
+ vgic_set_kvm_info(&gic_v2_kvm_info);
}
static int __init gic_v2_acpi_init(union acpi_subtable_headers *header,
diff --git a/include/kvm/arm_vgic.h b/include/kvm/arm_vgic.h
index ec621180ef09..e602d848fc1a 100644
--- a/include/kvm/arm_vgic.h
+++ b/include/kvm/arm_vgic.h
@@ -72,6 +72,9 @@ struct vgic_global {
bool has_gicv4;
bool has_gicv4_1;
+ /* Pseudo GICv3 from outer space */
+ bool no_hw_deactivation;
+
/* GIC system register CPU interface */
struct static_key_false gicv3_cpuif;
@@ -89,6 +92,26 @@ enum vgic_irq_config {
VGIC_CONFIG_LEVEL
};
+/*
+ * Per-irq ops overriding some common behavious.
+ *
+ * Always called in non-preemptible section and the functions can use
+ * kvm_arm_get_running_vcpu() to get the vcpu pointer for private IRQs.
+ */
+struct irq_ops {
+ /* Per interrupt flags for special-cased interrupts */
+ unsigned long flags;
+
+#define VGIC_IRQ_SW_RESAMPLE BIT(0) /* Clear the active state for resampling */
+
+ /*
+ * Callback function pointer to in-kernel devices that can tell us the
+ * state of the input level of mapped level-triggered IRQ faster than
+ * peaking into the physical GIC.
+ */
+ bool (*get_input_level)(int vintid);
+};
+
struct vgic_irq {
raw_spinlock_t irq_lock; /* Protects the content of the struct */
struct list_head lpi_list; /* Used to link all LPIs together */
@@ -126,21 +149,17 @@ struct vgic_irq {
u8 group; /* 0 == group 0, 1 == group 1 */
enum vgic_irq_config config; /* Level or edge */
- /*
- * Callback function pointer to in-kernel devices that can tell us the
- * state of the input level of mapped level-triggered IRQ faster than
- * peaking into the physical GIC.
- *
- * Always called in non-preemptible section and the functions can use
- * kvm_arm_get_running_vcpu() to get the vcpu pointer for private
- * IRQs.
- */
- bool (*get_input_level)(int vintid);
+ struct irq_ops *ops;
void *owner; /* Opaque pointer to reserve an interrupt
for in-kernel devices. */
};
+static inline bool vgic_irq_needs_resampling(struct vgic_irq *irq)
+{
+ return irq->ops && (irq->ops->flags & VGIC_IRQ_SW_RESAMPLE);
+}
+
struct vgic_register_region;
struct vgic_its;
@@ -352,7 +371,7 @@ void kvm_vgic_init_cpu_hardware(void);
int kvm_vgic_inject_irq(struct kvm *kvm, int cpuid, unsigned int intid,
bool level, void *owner);
int kvm_vgic_map_phys_irq(struct kvm_vcpu *vcpu, unsigned int host_irq,
- u32 vintid, bool (*get_input_level)(int vindid));
+ u32 vintid, struct irq_ops *ops);
int kvm_vgic_unmap_phys_irq(struct kvm_vcpu *vcpu, unsigned int vintid);
bool kvm_vgic_map_is_active(struct kvm_vcpu *vcpu, unsigned int vintid);
diff --git a/include/linux/irqchip/arm-gic-common.h b/include/linux/irqchip/arm-gic-common.h
index fa8c0455c352..1177f3a1aed5 100644
--- a/include/linux/irqchip/arm-gic-common.h
+++ b/include/linux/irqchip/arm-gic-common.h
@@ -7,8 +7,7 @@
#ifndef __LINUX_IRQCHIP_ARM_GIC_COMMON_H
#define __LINUX_IRQCHIP_ARM_GIC_COMMON_H
-#include <linux/types.h>
-#include <linux/ioport.h>
+#include <linux/irqchip/arm-vgic-info.h>
#define GICD_INT_DEF_PRI 0xa0
#define GICD_INT_DEF_PRI_X4 ((GICD_INT_DEF_PRI << 24) |\
@@ -16,28 +15,6 @@
(GICD_INT_DEF_PRI << 8) |\
GICD_INT_DEF_PRI)
-enum gic_type {
- GIC_V2,
- GIC_V3,
-};
-
-struct gic_kvm_info {
- /* GIC type */
- enum gic_type type;
- /* Virtual CPU interface */
- struct resource vcpu;
- /* Interrupt number */
- unsigned int maint_irq;
- /* Virtual control interface */
- struct resource vctrl;
- /* vlpi support */
- bool has_v4;
- /* rvpeid support */
- bool has_v4_1;
-};
-
-const struct gic_kvm_info *gic_get_kvm_info(void);
-
struct irq_domain;
struct fwnode_handle;
int gicv2m_init(struct fwnode_handle *parent_handle,
diff --git a/include/linux/irqchip/arm-vgic-info.h b/include/linux/irqchip/arm-vgic-info.h
new file mode 100644
index 000000000000..a75b2c7de69d
--- /dev/null
+++ b/include/linux/irqchip/arm-vgic-info.h
@@ -0,0 +1,45 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+/*
+ * include/linux/irqchip/arm-vgic-info.h
+ *
+ * Copyright (C) 2016 ARM Limited, All Rights Reserved.
+ */
+#ifndef __LINUX_IRQCHIP_ARM_VGIC_INFO_H
+#define __LINUX_IRQCHIP_ARM_VGIC_INFO_H
+
+#include <linux/types.h>
+#include <linux/ioport.h>
+
+enum gic_type {
+ /* Full GICv2 */
+ GIC_V2,
+ /* Full GICv3, optionally with v2 compat */
+ GIC_V3,
+};
+
+struct gic_kvm_info {
+ /* GIC type */
+ enum gic_type type;
+ /* Virtual CPU interface */
+ struct resource vcpu;
+ /* Interrupt number */
+ unsigned int maint_irq;
+ /* No interrupt mask, no need to use the above field */
+ bool no_maint_irq_mask;
+ /* Virtual control interface */
+ struct resource vctrl;
+ /* vlpi support */
+ bool has_v4;
+ /* rvpeid support */
+ bool has_v4_1;
+ /* Deactivation impared, subpar stuff */
+ bool no_hw_deactivation;
+};
+
+#ifdef CONFIG_KVM
+void vgic_set_kvm_info(const struct gic_kvm_info *info);
+#else
+static inline void vgic_set_kvm_info(const struct gic_kvm_info *info) {}
+#endif
+
+#endif
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