i8254.o ioapic.o irq_comm.o cpuid.o pmu.o mtrr.o \
hyperv.o debugfs.o mmu/mmu.o mmu/page_track.o
-kvm-intel-y += vmx/vmx.o vmx/vmenter.o vmx/pmu_intel.o vmx/vmcs12.o vmx/evmcs.o vmx/nested.o
+kvm-intel-y += vmx/vmx.o vmx/vmenter.o vmx/pmu_intel.o vmx/vmcs12.o \
+ vmx/evmcs.o vmx/nested.o vmx/posted_intr.o
kvm-amd-y += svm/svm.o svm/vmenter.o svm/pmu.o svm/nested.o svm/avic.o svm/sev.o
obj-$(CONFIG_KVM) += kvm.o
--- /dev/null
+// SPDX-License-Identifier: GPL-2.0-only
+#include <linux/kvm_host.h>
+
+#include <asm/irq_remapping.h>
+#include <asm/cpu.h>
+
+#include "lapic.h"
+#include "posted_intr.h"
+#include "trace.h"
+#include "vmx.h"
+
+/*
+ * We maintian a per-CPU linked-list of vCPU, so in wakeup_handler() we
+ * can find which vCPU should be waken up.
+ */
+static DEFINE_PER_CPU(struct list_head, blocked_vcpu_on_cpu);
+static DEFINE_PER_CPU(spinlock_t, blocked_vcpu_on_cpu_lock);
+
+static inline struct pi_desc *vcpu_to_pi_desc(struct kvm_vcpu *vcpu)
+{
+ return &(to_vmx(vcpu)->pi_desc);
+}
+
+void vmx_vcpu_pi_load(struct kvm_vcpu *vcpu, int cpu)
+{
+ struct pi_desc *pi_desc = vcpu_to_pi_desc(vcpu);
+ struct pi_desc old, new;
+ unsigned int dest;
+
+ /*
+ * In case of hot-plug or hot-unplug, we may have to undo
+ * vmx_vcpu_pi_put even if there is no assigned device. And we
+ * always keep PI.NDST up to date for simplicity: it makes the
+ * code easier, and CPU migration is not a fast path.
+ */
+ if (!pi_test_sn(pi_desc) && vcpu->cpu == cpu)
+ return;
+
+ /*
+ * If the 'nv' field is POSTED_INTR_WAKEUP_VECTOR, do not change
+ * PI.NDST: pi_post_block is the one expected to change PID.NDST and the
+ * wakeup handler expects the vCPU to be on the blocked_vcpu_list that
+ * matches PI.NDST. Otherwise, a vcpu may not be able to be woken up
+ * correctly.
+ */
+ if (pi_desc->nv == POSTED_INTR_WAKEUP_VECTOR || vcpu->cpu == cpu) {
+ pi_clear_sn(pi_desc);
+ goto after_clear_sn;
+ }
+
+ /* The full case. */
+ do {
+ old.control = new.control = pi_desc->control;
+
+ dest = cpu_physical_id(cpu);
+
+ if (x2apic_enabled())
+ new.ndst = dest;
+ else
+ new.ndst = (dest << 8) & 0xFF00;
+
+ new.sn = 0;
+ } while (cmpxchg64(&pi_desc->control, old.control,
+ new.control) != old.control);
+
+after_clear_sn:
+
+ /*
+ * Clear SN before reading the bitmap. The VT-d firmware
+ * writes the bitmap and reads SN atomically (5.2.3 in the
+ * spec), so it doesn't really have a memory barrier that
+ * pairs with this, but we cannot do that and we need one.
+ */
+ smp_mb__after_atomic();
+
+ if (!pi_is_pir_empty(pi_desc))
+ pi_set_on(pi_desc);
+}
+
+void vmx_vcpu_pi_put(struct kvm_vcpu *vcpu)
+{
+ struct pi_desc *pi_desc = vcpu_to_pi_desc(vcpu);
+
+ if (!kvm_arch_has_assigned_device(vcpu->kvm) ||
+ !irq_remapping_cap(IRQ_POSTING_CAP) ||
+ !kvm_vcpu_apicv_active(vcpu))
+ return;
+
+ /* Set SN when the vCPU is preempted */
+ if (vcpu->preempted)
+ pi_set_sn(pi_desc);
+}
+
+static void __pi_post_block(struct kvm_vcpu *vcpu)
+{
+ struct pi_desc *pi_desc = vcpu_to_pi_desc(vcpu);
+ struct pi_desc old, new;
+ unsigned int dest;
+
+ do {
+ old.control = new.control = pi_desc->control;
+ WARN(old.nv != POSTED_INTR_WAKEUP_VECTOR,
+ "Wakeup handler not enabled while the VCPU is blocked\n");
+
+ dest = cpu_physical_id(vcpu->cpu);
+
+ if (x2apic_enabled())
+ new.ndst = dest;
+ else
+ new.ndst = (dest << 8) & 0xFF00;
+
+ /* set 'NV' to 'notification vector' */
+ new.nv = POSTED_INTR_VECTOR;
+ } while (cmpxchg64(&pi_desc->control, old.control,
+ new.control) != old.control);
+
+ if (!WARN_ON_ONCE(vcpu->pre_pcpu == -1)) {
+ spin_lock(&per_cpu(blocked_vcpu_on_cpu_lock, vcpu->pre_pcpu));
+ list_del(&vcpu->blocked_vcpu_list);
+ spin_unlock(&per_cpu(blocked_vcpu_on_cpu_lock, vcpu->pre_pcpu));
+ vcpu->pre_pcpu = -1;
+ }
+}
+
+/*
+ * This routine does the following things for vCPU which is going
+ * to be blocked if VT-d PI is enabled.
+ * - Store the vCPU to the wakeup list, so when interrupts happen
+ * we can find the right vCPU to wake up.
+ * - Change the Posted-interrupt descriptor as below:
+ * 'NDST' <-- vcpu->pre_pcpu
+ * 'NV' <-- POSTED_INTR_WAKEUP_VECTOR
+ * - If 'ON' is set during this process, which means at least one
+ * interrupt is posted for this vCPU, we cannot block it, in
+ * this case, return 1, otherwise, return 0.
+ *
+ */
+int pi_pre_block(struct kvm_vcpu *vcpu)
+{
+ unsigned int dest;
+ struct pi_desc old, new;
+ struct pi_desc *pi_desc = vcpu_to_pi_desc(vcpu);
+
+ if (!kvm_arch_has_assigned_device(vcpu->kvm) ||
+ !irq_remapping_cap(IRQ_POSTING_CAP) ||
+ !kvm_vcpu_apicv_active(vcpu))
+ return 0;
+
+ WARN_ON(irqs_disabled());
+ local_irq_disable();
+ if (!WARN_ON_ONCE(vcpu->pre_pcpu != -1)) {
+ vcpu->pre_pcpu = vcpu->cpu;
+ spin_lock(&per_cpu(blocked_vcpu_on_cpu_lock, vcpu->pre_pcpu));
+ list_add_tail(&vcpu->blocked_vcpu_list,
+ &per_cpu(blocked_vcpu_on_cpu,
+ vcpu->pre_pcpu));
+ spin_unlock(&per_cpu(blocked_vcpu_on_cpu_lock, vcpu->pre_pcpu));
+ }
+
+ do {
+ old.control = new.control = pi_desc->control;
+
+ WARN((pi_desc->sn == 1),
+ "Warning: SN field of posted-interrupts "
+ "is set before blocking\n");
+
+ /*
+ * Since vCPU can be preempted during this process,
+ * vcpu->cpu could be different with pre_pcpu, we
+ * need to set pre_pcpu as the destination of wakeup
+ * notification event, then we can find the right vCPU
+ * to wakeup in wakeup handler if interrupts happen
+ * when the vCPU is in blocked state.
+ */
+ dest = cpu_physical_id(vcpu->pre_pcpu);
+
+ if (x2apic_enabled())
+ new.ndst = dest;
+ else
+ new.ndst = (dest << 8) & 0xFF00;
+
+ /* set 'NV' to 'wakeup vector' */
+ new.nv = POSTED_INTR_WAKEUP_VECTOR;
+ } while (cmpxchg64(&pi_desc->control, old.control,
+ new.control) != old.control);
+
+ /* We should not block the vCPU if an interrupt is posted for it. */
+ if (pi_test_on(pi_desc) == 1)
+ __pi_post_block(vcpu);
+
+ local_irq_enable();
+ return (vcpu->pre_pcpu == -1);
+}
+
+void pi_post_block(struct kvm_vcpu *vcpu)
+{
+ if (vcpu->pre_pcpu == -1)
+ return;
+
+ WARN_ON(irqs_disabled());
+ local_irq_disable();
+ __pi_post_block(vcpu);
+ local_irq_enable();
+}
+
+/*
+ * Handler for POSTED_INTERRUPT_WAKEUP_VECTOR.
+ */
+void pi_wakeup_handler(void)
+{
+ struct kvm_vcpu *vcpu;
+ int cpu = smp_processor_id();
+
+ spin_lock(&per_cpu(blocked_vcpu_on_cpu_lock, cpu));
+ list_for_each_entry(vcpu, &per_cpu(blocked_vcpu_on_cpu, cpu),
+ blocked_vcpu_list) {
+ struct pi_desc *pi_desc = vcpu_to_pi_desc(vcpu);
+
+ if (pi_test_on(pi_desc) == 1)
+ kvm_vcpu_kick(vcpu);
+ }
+ spin_unlock(&per_cpu(blocked_vcpu_on_cpu_lock, cpu));
+}
+
+void __init pi_init(int cpu)
+{
+ INIT_LIST_HEAD(&per_cpu(blocked_vcpu_on_cpu, cpu));
+ spin_lock_init(&per_cpu(blocked_vcpu_on_cpu_lock, cpu));
+}
+
+bool pi_has_pending_interrupt(struct kvm_vcpu *vcpu)
+{
+ struct pi_desc *pi_desc = vcpu_to_pi_desc(vcpu);
+
+ return pi_test_on(pi_desc) ||
+ (pi_test_sn(pi_desc) && !pi_is_pir_empty(pi_desc));
+}
+
+
+/*
+ * pi_update_irte - set IRTE for Posted-Interrupts
+ *
+ * @kvm: kvm
+ * @host_irq: host irq of the interrupt
+ * @guest_irq: gsi of the interrupt
+ * @set: set or unset PI
+ * returns 0 on success, < 0 on failure
+ */
+int pi_update_irte(struct kvm *kvm, unsigned int host_irq, uint32_t guest_irq,
+ bool set)
+{
+ struct kvm_kernel_irq_routing_entry *e;
+ struct kvm_irq_routing_table *irq_rt;
+ struct kvm_lapic_irq irq;
+ struct kvm_vcpu *vcpu;
+ struct vcpu_data vcpu_info;
+ int idx, ret = 0;
+
+ if (!kvm_arch_has_assigned_device(kvm) ||
+ !irq_remapping_cap(IRQ_POSTING_CAP) ||
+ !kvm_vcpu_apicv_active(kvm->vcpus[0]))
+ return 0;
+
+ idx = srcu_read_lock(&kvm->irq_srcu);
+ irq_rt = srcu_dereference(kvm->irq_routing, &kvm->irq_srcu);
+ if (guest_irq >= irq_rt->nr_rt_entries ||
+ hlist_empty(&irq_rt->map[guest_irq])) {
+ pr_warn_once("no route for guest_irq %u/%u (broken user space?)\n",
+ guest_irq, irq_rt->nr_rt_entries);
+ goto out;
+ }
+
+ hlist_for_each_entry(e, &irq_rt->map[guest_irq], link) {
+ if (e->type != KVM_IRQ_ROUTING_MSI)
+ continue;
+ /*
+ * VT-d PI cannot support posting multicast/broadcast
+ * interrupts to a vCPU, we still use interrupt remapping
+ * for these kind of interrupts.
+ *
+ * For lowest-priority interrupts, we only support
+ * those with single CPU as the destination, e.g. user
+ * configures the interrupts via /proc/irq or uses
+ * irqbalance to make the interrupts single-CPU.
+ *
+ * We will support full lowest-priority interrupt later.
+ *
+ * In addition, we can only inject generic interrupts using
+ * the PI mechanism, refuse to route others through it.
+ */
+
+ kvm_set_msi_irq(kvm, e, &irq);
+ if (!kvm_intr_is_single_vcpu(kvm, &irq, &vcpu) ||
+ !kvm_irq_is_postable(&irq)) {
+ /*
+ * Make sure the IRTE is in remapped mode if
+ * we don't handle it in posted mode.
+ */
+ ret = irq_set_vcpu_affinity(host_irq, NULL);
+ if (ret < 0) {
+ printk(KERN_INFO
+ "failed to back to remapped mode, irq: %u\n",
+ host_irq);
+ goto out;
+ }
+
+ continue;
+ }
+
+ vcpu_info.pi_desc_addr = __pa(&to_vmx(vcpu)->pi_desc);
+ vcpu_info.vector = irq.vector;
+
+ trace_kvm_pi_irte_update(host_irq, vcpu->vcpu_id, e->gsi,
+ vcpu_info.vector, vcpu_info.pi_desc_addr, set);
+
+ if (set)
+ ret = irq_set_vcpu_affinity(host_irq, &vcpu_info);
+ else
+ ret = irq_set_vcpu_affinity(host_irq, NULL);
+
+ if (ret < 0) {
+ printk(KERN_INFO "%s: failed to update PI IRTE\n",
+ __func__);
+ goto out;
+ }
+ }
+
+ ret = 0;
+out:
+ srcu_read_unlock(&kvm->irq_srcu, idx);
+ return ret;
+}
--- /dev/null
+/* SPDX-License-Identifier: GPL-2.0 */
+#ifndef __KVM_X86_VMX_POSTED_INTR_H
+#define __KVM_X86_VMX_POSTED_INTR_H
+
+#define POSTED_INTR_ON 0
+#define POSTED_INTR_SN 1
+
+/* Posted-Interrupt Descriptor */
+struct pi_desc {
+ u32 pir[8]; /* Posted interrupt requested */
+ union {
+ struct {
+ /* bit 256 - Outstanding Notification */
+ u16 on : 1,
+ /* bit 257 - Suppress Notification */
+ sn : 1,
+ /* bit 271:258 - Reserved */
+ rsvd_1 : 14;
+ /* bit 279:272 - Notification Vector */
+ u8 nv;
+ /* bit 287:280 - Reserved */
+ u8 rsvd_2;
+ /* bit 319:288 - Notification Destination */
+ u32 ndst;
+ };
+ u64 control;
+ };
+ u32 rsvd[6];
+} __aligned(64);
+
+static inline bool pi_test_and_set_on(struct pi_desc *pi_desc)
+{
+ return test_and_set_bit(POSTED_INTR_ON,
+ (unsigned long *)&pi_desc->control);
+}
+
+static inline bool pi_test_and_clear_on(struct pi_desc *pi_desc)
+{
+ return test_and_clear_bit(POSTED_INTR_ON,
+ (unsigned long *)&pi_desc->control);
+}
+
+static inline int pi_test_and_set_pir(int vector, struct pi_desc *pi_desc)
+{
+ return test_and_set_bit(vector, (unsigned long *)pi_desc->pir);
+}
+
+static inline bool pi_is_pir_empty(struct pi_desc *pi_desc)
+{
+ return bitmap_empty((unsigned long *)pi_desc->pir, NR_VECTORS);
+}
+
+static inline void pi_set_sn(struct pi_desc *pi_desc)
+{
+ set_bit(POSTED_INTR_SN,
+ (unsigned long *)&pi_desc->control);
+}
+
+static inline void pi_set_on(struct pi_desc *pi_desc)
+{
+ set_bit(POSTED_INTR_ON,
+ (unsigned long *)&pi_desc->control);
+}
+
+static inline void pi_clear_on(struct pi_desc *pi_desc)
+{
+ clear_bit(POSTED_INTR_ON,
+ (unsigned long *)&pi_desc->control);
+}
+
+static inline void pi_clear_sn(struct pi_desc *pi_desc)
+{
+ clear_bit(POSTED_INTR_SN,
+ (unsigned long *)&pi_desc->control);
+}
+
+static inline int pi_test_on(struct pi_desc *pi_desc)
+{
+ return test_bit(POSTED_INTR_ON,
+ (unsigned long *)&pi_desc->control);
+}
+
+static inline int pi_test_sn(struct pi_desc *pi_desc)
+{
+ return test_bit(POSTED_INTR_SN,
+ (unsigned long *)&pi_desc->control);
+}
+
+void vmx_vcpu_pi_load(struct kvm_vcpu *vcpu, int cpu);
+void vmx_vcpu_pi_put(struct kvm_vcpu *vcpu);
+int pi_pre_block(struct kvm_vcpu *vcpu);
+void pi_post_block(struct kvm_vcpu *vcpu);
+void pi_wakeup_handler(void);
+void __init pi_init(int cpu);
+bool pi_has_pending_interrupt(struct kvm_vcpu *vcpu);
+int pi_update_irte(struct kvm *kvm, unsigned int host_irq, uint32_t guest_irq,
+ bool set);
+
+#endif /* __KVM_X86_VMX_POSTED_INTR_H */
\ No newline at end of file
*/
static DEFINE_PER_CPU(struct list_head, loaded_vmcss_on_cpu);
-/*
- * We maintian a per-CPU linked-list of vCPU, so in wakeup_handler() we
- * can find which vCPU should be waken up.
- */
-static DEFINE_PER_CPU(struct list_head, blocked_vcpu_on_cpu);
-static DEFINE_PER_CPU(spinlock_t, blocked_vcpu_on_cpu_lock);
-
static DECLARE_BITMAP(vmx_vpid_bitmap, VMX_NR_VPIDS);
static DEFINE_SPINLOCK(vmx_vpid_lock);
}
#endif
-static void vmx_vcpu_pi_load(struct kvm_vcpu *vcpu, int cpu)
-{
- struct pi_desc *pi_desc = vcpu_to_pi_desc(vcpu);
- struct pi_desc old, new;
- unsigned int dest;
-
- /*
- * In case of hot-plug or hot-unplug, we may have to undo
- * vmx_vcpu_pi_put even if there is no assigned device. And we
- * always keep PI.NDST up to date for simplicity: it makes the
- * code easier, and CPU migration is not a fast path.
- */
- if (!pi_test_sn(pi_desc) && vcpu->cpu == cpu)
- return;
-
- /*
- * If the 'nv' field is POSTED_INTR_WAKEUP_VECTOR, do not change
- * PI.NDST: pi_post_block is the one expected to change PID.NDST and the
- * wakeup handler expects the vCPU to be on the blocked_vcpu_list that
- * matches PI.NDST. Otherwise, a vcpu may not be able to be woken up
- * correctly.
- */
- if (pi_desc->nv == POSTED_INTR_WAKEUP_VECTOR || vcpu->cpu == cpu) {
- pi_clear_sn(pi_desc);
- goto after_clear_sn;
- }
-
- /* The full case. */
- do {
- old.control = new.control = pi_desc->control;
-
- dest = cpu_physical_id(cpu);
-
- if (x2apic_enabled())
- new.ndst = dest;
- else
- new.ndst = (dest << 8) & 0xFF00;
-
- new.sn = 0;
- } while (cmpxchg64(&pi_desc->control, old.control,
- new.control) != old.control);
-
-after_clear_sn:
-
- /*
- * Clear SN before reading the bitmap. The VT-d firmware
- * writes the bitmap and reads SN atomically (5.2.3 in the
- * spec), so it doesn't really have a memory barrier that
- * pairs with this, but we cannot do that and we need one.
- */
- smp_mb__after_atomic();
-
- if (!pi_is_pir_empty(pi_desc))
- pi_set_on(pi_desc);
-}
-
void vmx_vcpu_load_vmcs(struct kvm_vcpu *vcpu, int cpu,
struct loaded_vmcs *buddy)
{
vmx->host_debugctlmsr = get_debugctlmsr();
}
-static void vmx_vcpu_pi_put(struct kvm_vcpu *vcpu)
-{
- struct pi_desc *pi_desc = vcpu_to_pi_desc(vcpu);
-
- if (!kvm_arch_has_assigned_device(vcpu->kvm) ||
- !irq_remapping_cap(IRQ_POSTING_CAP) ||
- !kvm_vcpu_apicv_active(vcpu))
- return;
-
- /* Set SN when the vCPU is preempted */
- if (vcpu->preempted)
- pi_set_sn(pi_desc);
-}
-
static void vmx_vcpu_put(struct kvm_vcpu *vcpu)
{
vmx_vcpu_pi_put(vcpu);
}
}
-/*
- * Handler for POSTED_INTERRUPT_WAKEUP_VECTOR.
- */
-static void wakeup_handler(void)
-{
- struct kvm_vcpu *vcpu;
- int cpu = smp_processor_id();
-
- spin_lock(&per_cpu(blocked_vcpu_on_cpu_lock, cpu));
- list_for_each_entry(vcpu, &per_cpu(blocked_vcpu_on_cpu, cpu),
- blocked_vcpu_list) {
- struct pi_desc *pi_desc = vcpu_to_pi_desc(vcpu);
-
- if (pi_test_on(pi_desc) == 1)
- kvm_vcpu_kick(vcpu);
- }
- spin_unlock(&per_cpu(blocked_vcpu_on_cpu_lock, cpu));
-}
-
static void vmx_enable_tdp(void)
{
kvm_mmu_set_mask_ptes(VMX_EPT_READABLE_MASK,
return max_irr;
}
-static bool vmx_dy_apicv_has_pending_interrupt(struct kvm_vcpu *vcpu)
-{
- struct pi_desc *pi_desc = vcpu_to_pi_desc(vcpu);
-
- return pi_test_on(pi_desc) ||
- (pi_test_sn(pi_desc) && !pi_is_pir_empty(pi_desc));
-}
-
static void vmx_load_eoi_exitmap(struct kvm_vcpu *vcpu, u64 *eoi_exit_bitmap)
{
if (!kvm_vcpu_apicv_active(vcpu))
kvm_mmu_clear_dirty_pt_masked(kvm, memslot, offset, mask);
}
-static void __pi_post_block(struct kvm_vcpu *vcpu)
-{
- struct pi_desc *pi_desc = vcpu_to_pi_desc(vcpu);
- struct pi_desc old, new;
- unsigned int dest;
-
- do {
- old.control = new.control = pi_desc->control;
- WARN(old.nv != POSTED_INTR_WAKEUP_VECTOR,
- "Wakeup handler not enabled while the VCPU is blocked\n");
-
- dest = cpu_physical_id(vcpu->cpu);
-
- if (x2apic_enabled())
- new.ndst = dest;
- else
- new.ndst = (dest << 8) & 0xFF00;
-
- /* set 'NV' to 'notification vector' */
- new.nv = POSTED_INTR_VECTOR;
- } while (cmpxchg64(&pi_desc->control, old.control,
- new.control) != old.control);
-
- if (!WARN_ON_ONCE(vcpu->pre_pcpu == -1)) {
- spin_lock(&per_cpu(blocked_vcpu_on_cpu_lock, vcpu->pre_pcpu));
- list_del(&vcpu->blocked_vcpu_list);
- spin_unlock(&per_cpu(blocked_vcpu_on_cpu_lock, vcpu->pre_pcpu));
- vcpu->pre_pcpu = -1;
- }
-}
-
-/*
- * This routine does the following things for vCPU which is going
- * to be blocked if VT-d PI is enabled.
- * - Store the vCPU to the wakeup list, so when interrupts happen
- * we can find the right vCPU to wake up.
- * - Change the Posted-interrupt descriptor as below:
- * 'NDST' <-- vcpu->pre_pcpu
- * 'NV' <-- POSTED_INTR_WAKEUP_VECTOR
- * - If 'ON' is set during this process, which means at least one
- * interrupt is posted for this vCPU, we cannot block it, in
- * this case, return 1, otherwise, return 0.
- *
- */
-static int pi_pre_block(struct kvm_vcpu *vcpu)
-{
- unsigned int dest;
- struct pi_desc old, new;
- struct pi_desc *pi_desc = vcpu_to_pi_desc(vcpu);
-
- if (!kvm_arch_has_assigned_device(vcpu->kvm) ||
- !irq_remapping_cap(IRQ_POSTING_CAP) ||
- !kvm_vcpu_apicv_active(vcpu))
- return 0;
-
- WARN_ON(irqs_disabled());
- local_irq_disable();
- if (!WARN_ON_ONCE(vcpu->pre_pcpu != -1)) {
- vcpu->pre_pcpu = vcpu->cpu;
- spin_lock(&per_cpu(blocked_vcpu_on_cpu_lock, vcpu->pre_pcpu));
- list_add_tail(&vcpu->blocked_vcpu_list,
- &per_cpu(blocked_vcpu_on_cpu,
- vcpu->pre_pcpu));
- spin_unlock(&per_cpu(blocked_vcpu_on_cpu_lock, vcpu->pre_pcpu));
- }
-
- do {
- old.control = new.control = pi_desc->control;
-
- WARN((pi_desc->sn == 1),
- "Warning: SN field of posted-interrupts "
- "is set before blocking\n");
-
- /*
- * Since vCPU can be preempted during this process,
- * vcpu->cpu could be different with pre_pcpu, we
- * need to set pre_pcpu as the destination of wakeup
- * notification event, then we can find the right vCPU
- * to wakeup in wakeup handler if interrupts happen
- * when the vCPU is in blocked state.
- */
- dest = cpu_physical_id(vcpu->pre_pcpu);
-
- if (x2apic_enabled())
- new.ndst = dest;
- else
- new.ndst = (dest << 8) & 0xFF00;
-
- /* set 'NV' to 'wakeup vector' */
- new.nv = POSTED_INTR_WAKEUP_VECTOR;
- } while (cmpxchg64(&pi_desc->control, old.control,
- new.control) != old.control);
-
- /* We should not block the vCPU if an interrupt is posted for it. */
- if (pi_test_on(pi_desc) == 1)
- __pi_post_block(vcpu);
-
- local_irq_enable();
- return (vcpu->pre_pcpu == -1);
-}
-
static int vmx_pre_block(struct kvm_vcpu *vcpu)
{
if (pi_pre_block(vcpu))
return 0;
}
-static void pi_post_block(struct kvm_vcpu *vcpu)
-{
- if (vcpu->pre_pcpu == -1)
- return;
-
- WARN_ON(irqs_disabled());
- local_irq_disable();
- __pi_post_block(vcpu);
- local_irq_enable();
-}
-
static void vmx_post_block(struct kvm_vcpu *vcpu)
{
if (kvm_x86_ops.set_hv_timer)
pi_post_block(vcpu);
}
-/*
- * vmx_update_pi_irte - set IRTE for Posted-Interrupts
- *
- * @kvm: kvm
- * @host_irq: host irq of the interrupt
- * @guest_irq: gsi of the interrupt
- * @set: set or unset PI
- * returns 0 on success, < 0 on failure
- */
-static int vmx_update_pi_irte(struct kvm *kvm, unsigned int host_irq,
- uint32_t guest_irq, bool set)
-{
- struct kvm_kernel_irq_routing_entry *e;
- struct kvm_irq_routing_table *irq_rt;
- struct kvm_lapic_irq irq;
- struct kvm_vcpu *vcpu;
- struct vcpu_data vcpu_info;
- int idx, ret = 0;
-
- if (!kvm_arch_has_assigned_device(kvm) ||
- !irq_remapping_cap(IRQ_POSTING_CAP) ||
- !kvm_vcpu_apicv_active(kvm->vcpus[0]))
- return 0;
-
- idx = srcu_read_lock(&kvm->irq_srcu);
- irq_rt = srcu_dereference(kvm->irq_routing, &kvm->irq_srcu);
- if (guest_irq >= irq_rt->nr_rt_entries ||
- hlist_empty(&irq_rt->map[guest_irq])) {
- pr_warn_once("no route for guest_irq %u/%u (broken user space?)\n",
- guest_irq, irq_rt->nr_rt_entries);
- goto out;
- }
-
- hlist_for_each_entry(e, &irq_rt->map[guest_irq], link) {
- if (e->type != KVM_IRQ_ROUTING_MSI)
- continue;
- /*
- * VT-d PI cannot support posting multicast/broadcast
- * interrupts to a vCPU, we still use interrupt remapping
- * for these kind of interrupts.
- *
- * For lowest-priority interrupts, we only support
- * those with single CPU as the destination, e.g. user
- * configures the interrupts via /proc/irq or uses
- * irqbalance to make the interrupts single-CPU.
- *
- * We will support full lowest-priority interrupt later.
- *
- * In addition, we can only inject generic interrupts using
- * the PI mechanism, refuse to route others through it.
- */
-
- kvm_set_msi_irq(kvm, e, &irq);
- if (!kvm_intr_is_single_vcpu(kvm, &irq, &vcpu) ||
- !kvm_irq_is_postable(&irq)) {
- /*
- * Make sure the IRTE is in remapped mode if
- * we don't handle it in posted mode.
- */
- ret = irq_set_vcpu_affinity(host_irq, NULL);
- if (ret < 0) {
- printk(KERN_INFO
- "failed to back to remapped mode, irq: %u\n",
- host_irq);
- goto out;
- }
-
- continue;
- }
-
- vcpu_info.pi_desc_addr = __pa(vcpu_to_pi_desc(vcpu));
- vcpu_info.vector = irq.vector;
-
- trace_kvm_pi_irte_update(host_irq, vcpu->vcpu_id, e->gsi,
- vcpu_info.vector, vcpu_info.pi_desc_addr, set);
-
- if (set)
- ret = irq_set_vcpu_affinity(host_irq, &vcpu_info);
- else
- ret = irq_set_vcpu_affinity(host_irq, NULL);
-
- if (ret < 0) {
- printk(KERN_INFO "%s: failed to update PI IRTE\n",
- __func__);
- goto out;
- }
- }
-
- ret = 0;
-out:
- srcu_read_unlock(&kvm->irq_srcu, idx);
- return ret;
-}
-
static void vmx_setup_mce(struct kvm_vcpu *vcpu)
{
if (vcpu->arch.mcg_cap & MCG_LMCE_P)
.guest_apic_has_interrupt = vmx_guest_apic_has_interrupt,
.sync_pir_to_irr = vmx_sync_pir_to_irr,
.deliver_posted_interrupt = vmx_deliver_posted_interrupt,
- .dy_apicv_has_pending_interrupt = vmx_dy_apicv_has_pending_interrupt,
+ .dy_apicv_has_pending_interrupt = pi_has_pending_interrupt,
.set_tss_addr = vmx_set_tss_addr,
.set_identity_map_addr = vmx_set_identity_map_addr,
.pmu_ops = &intel_pmu_ops,
.nested_ops = &vmx_nested_ops,
- .update_pi_irte = vmx_update_pi_irte,
+ .update_pi_irte = pi_update_irte,
#ifdef CONFIG_X86_64
.set_hv_timer = vmx_set_hv_timer,
vmx_x86_ops.request_immediate_exit = __kvm_request_immediate_exit;
}
- kvm_set_posted_intr_wakeup_handler(wakeup_handler);
+ kvm_set_posted_intr_wakeup_handler(pi_wakeup_handler);
kvm_mce_cap_supported |= MCG_LMCE_P;
for_each_possible_cpu(cpu) {
INIT_LIST_HEAD(&per_cpu(loaded_vmcss_on_cpu, cpu));
- INIT_LIST_HEAD(&per_cpu(blocked_vcpu_on_cpu, cpu));
- spin_lock_init(&per_cpu(blocked_vcpu_on_cpu_lock, cpu));
+
+ pi_init(cpu);
}
#ifdef CONFIG_KEXEC_CORE
#include "capabilities.h"
#include "kvm_cache_regs.h"
#include "ops.h"
+#include "posted_intr.h"
#include "vmcs.h"
#include "cpuid.h"
SEG_FIELD_NR = 4
};
-/* Posted-Interrupt Descriptor */
-struct pi_desc {
- u32 pir[8]; /* Posted interrupt requested */
- union {
- struct {
- /* bit 256 - Outstanding Notification */
- u16 on : 1,
- /* bit 257 - Suppress Notification */
- sn : 1,
- /* bit 271:258 - Reserved */
- rsvd_1 : 14;
- /* bit 279:272 - Notification Vector */
- u8 nv;
- /* bit 287:280 - Reserved */
- u8 rsvd_2;
- /* bit 319:288 - Notification Destination */
- u32 ndst;
- };
- u64 control;
- };
- u32 rsvd[6];
-} __aligned(64);
-
#define RTIT_ADDR_RANGE 4
struct pt_ctx {
int vmx_find_msr_index(struct vmx_msrs *m, u32 msr);
void vmx_ept_load_pdptrs(struct kvm_vcpu *vcpu);
-#define POSTED_INTR_ON 0
-#define POSTED_INTR_SN 1
-
-static inline bool pi_test_and_set_on(struct pi_desc *pi_desc)
-{
- return test_and_set_bit(POSTED_INTR_ON,
- (unsigned long *)&pi_desc->control);
-}
-
-static inline bool pi_test_and_clear_on(struct pi_desc *pi_desc)
-{
- return test_and_clear_bit(POSTED_INTR_ON,
- (unsigned long *)&pi_desc->control);
-}
-
-static inline int pi_test_and_set_pir(int vector, struct pi_desc *pi_desc)
-{
- return test_and_set_bit(vector, (unsigned long *)pi_desc->pir);
-}
-
-static inline bool pi_is_pir_empty(struct pi_desc *pi_desc)
-{
- return bitmap_empty((unsigned long *)pi_desc->pir, NR_VECTORS);
-}
-
-static inline void pi_set_sn(struct pi_desc *pi_desc)
-{
- set_bit(POSTED_INTR_SN,
- (unsigned long *)&pi_desc->control);
-}
-
-static inline void pi_set_on(struct pi_desc *pi_desc)
-{
- set_bit(POSTED_INTR_ON,
- (unsigned long *)&pi_desc->control);
-}
-
-static inline void pi_clear_on(struct pi_desc *pi_desc)
-{
- clear_bit(POSTED_INTR_ON,
- (unsigned long *)&pi_desc->control);
-}
-
-static inline void pi_clear_sn(struct pi_desc *pi_desc)
-{
- clear_bit(POSTED_INTR_SN,
- (unsigned long *)&pi_desc->control);
-}
-
-static inline int pi_test_on(struct pi_desc *pi_desc)
-{
- return test_bit(POSTED_INTR_ON,
- (unsigned long *)&pi_desc->control);
-}
-
-static inline int pi_test_sn(struct pi_desc *pi_desc)
-{
- return test_bit(POSTED_INTR_SN,
- (unsigned long *)&pi_desc->control);
-}
-
static inline u8 vmx_get_rvi(void)
{
return vmcs_read16(GUEST_INTR_STATUS) & 0xff;
return container_of(vcpu, struct vcpu_vmx, vcpu);
}
-static inline struct pi_desc *vcpu_to_pi_desc(struct kvm_vcpu *vcpu)
-{
- return &(to_vmx(vcpu)->pi_desc);
-}
-
static inline unsigned long vmx_get_exit_qual(struct kvm_vcpu *vcpu)
{
struct vcpu_vmx *vmx = to_vmx(vcpu);
projects / mirror_ubuntu-kernels.git / commitdiff