summaryrefslogtreecommitdiff
path: root/arch/x86/kvm
diff options
context:
space:
mode:
Diffstat (limited to 'arch/x86/kvm')
-rw-r--r--arch/x86/kvm/lapic.c13
-rw-r--r--arch/x86/kvm/lapic.h1
-rw-r--r--arch/x86/kvm/vmx.c154
3 files changed, 161 insertions, 7 deletions
diff --git a/arch/x86/kvm/lapic.c b/arch/x86/kvm/lapic.c
index 3481e9eee8f4..86609c15726f 100644
--- a/arch/x86/kvm/lapic.c
+++ b/arch/x86/kvm/lapic.c
@@ -325,17 +325,24 @@ static u8 count_vectors(void *bitmap)
return count;
}
-void kvm_apic_update_irr(struct kvm_vcpu *vcpu, u32 *pir)
+void __kvm_apic_update_irr(u32 *pir, void *regs)
{
u32 i, pir_val;
- struct kvm_lapic *apic = vcpu->arch.apic;
for (i = 0; i <= 7; i++) {
pir_val = xchg(&pir[i], 0);
if (pir_val)
- *((u32 *)(apic->regs + APIC_IRR + i * 0x10)) |= pir_val;
+ *((u32 *)(regs + APIC_IRR + i * 0x10)) |= pir_val;
}
}
+EXPORT_SYMBOL_GPL(__kvm_apic_update_irr);
+
+void kvm_apic_update_irr(struct kvm_vcpu *vcpu, u32 *pir)
+{
+ struct kvm_lapic *apic = vcpu->arch.apic;
+
+ __kvm_apic_update_irr(pir, apic->regs);
+}
EXPORT_SYMBOL_GPL(kvm_apic_update_irr);
static inline void apic_set_irr(int vec, struct kvm_lapic *apic)
diff --git a/arch/x86/kvm/lapic.h b/arch/x86/kvm/lapic.h
index c1ef25c89508..0bc6c656625b 100644
--- a/arch/x86/kvm/lapic.h
+++ b/arch/x86/kvm/lapic.h
@@ -57,6 +57,7 @@ u64 kvm_lapic_get_base(struct kvm_vcpu *vcpu);
void kvm_apic_set_version(struct kvm_vcpu *vcpu);
void kvm_apic_update_tmr(struct kvm_vcpu *vcpu, u32 *tmr);
+void __kvm_apic_update_irr(u32 *pir, void *regs);
void kvm_apic_update_irr(struct kvm_vcpu *vcpu, u32 *pir);
int kvm_apic_set_irq(struct kvm_vcpu *vcpu, struct kvm_lapic_irq *irq,
unsigned long *dest_map);
diff --git a/arch/x86/kvm/vmx.c b/arch/x86/kvm/vmx.c
index 955eff21f14a..6e112472b0b3 100644
--- a/arch/x86/kvm/vmx.c
+++ b/arch/x86/kvm/vmx.c
@@ -218,6 +218,7 @@ struct __packed vmcs12 {
u64 tsc_offset;
u64 virtual_apic_page_addr;
u64 apic_access_addr;
+ u64 posted_intr_desc_addr;
u64 ept_pointer;
u64 eoi_exit_bitmap0;
u64 eoi_exit_bitmap1;
@@ -337,6 +338,7 @@ struct __packed vmcs12 {
u32 vmx_preemption_timer_value;
u32 padding32[7]; /* room for future expansion */
u16 virtual_processor_id;
+ u16 posted_intr_nv;
u16 guest_es_selector;
u16 guest_cs_selector;
u16 guest_ss_selector;
@@ -409,6 +411,10 @@ struct nested_vmx {
*/
struct page *apic_access_page;
struct page *virtual_apic_page;
+ struct page *pi_desc_page;
+ struct pi_desc *pi_desc;
+ bool pi_pending;
+ u16 posted_intr_nv;
u64 msr_ia32_feature_control;
struct hrtimer preemption_timer;
@@ -623,6 +629,7 @@ static int max_shadow_read_write_fields =
static const unsigned short vmcs_field_to_offset_table[] = {
FIELD(VIRTUAL_PROCESSOR_ID, virtual_processor_id),
+ FIELD(POSTED_INTR_NV, posted_intr_nv),
FIELD(GUEST_ES_SELECTOR, guest_es_selector),
FIELD(GUEST_CS_SELECTOR, guest_cs_selector),
FIELD(GUEST_SS_SELECTOR, guest_ss_selector),
@@ -648,6 +655,7 @@ static const unsigned short vmcs_field_to_offset_table[] = {
FIELD64(TSC_OFFSET, tsc_offset),
FIELD64(VIRTUAL_APIC_PAGE_ADDR, virtual_apic_page_addr),
FIELD64(APIC_ACCESS_ADDR, apic_access_addr),
+ FIELD64(POSTED_INTR_DESC_ADDR, posted_intr_desc_addr),
FIELD64(EPT_POINTER, ept_pointer),
FIELD64(EOI_EXIT_BITMAP0, eoi_exit_bitmap0),
FIELD64(EOI_EXIT_BITMAP1, eoi_exit_bitmap1),
@@ -800,6 +808,7 @@ static void kvm_cpu_vmxon(u64 addr);
static void kvm_cpu_vmxoff(void);
static bool vmx_mpx_supported(void);
static bool vmx_xsaves_supported(void);
+static int vmx_vm_has_apicv(struct kvm *kvm);
static int vmx_set_tss_addr(struct kvm *kvm, unsigned int addr);
static void vmx_set_segment(struct kvm_vcpu *vcpu,
struct kvm_segment *var, int seg);
@@ -1157,6 +1166,11 @@ static inline bool nested_cpu_has_vid(struct vmcs12 *vmcs12)
return nested_cpu_has2(vmcs12, SECONDARY_EXEC_VIRTUAL_INTR_DELIVERY);
}
+static inline bool nested_cpu_has_posted_intr(struct vmcs12 *vmcs12)
+{
+ return vmcs12->pin_based_vm_exec_control & PIN_BASED_POSTED_INTR;
+}
+
static inline bool is_exception(u32 intr_info)
{
return (intr_info & (INTR_INFO_INTR_TYPE_MASK | INTR_INFO_VALID_MASK))
@@ -2360,6 +2374,9 @@ static void nested_vmx_setup_ctls_msrs(struct vcpu_vmx *vmx)
vmx->nested.nested_vmx_pinbased_ctls_high |=
PIN_BASED_ALWAYSON_WITHOUT_TRUE_MSR |
PIN_BASED_VMX_PREEMPTION_TIMER;
+ if (vmx_vm_has_apicv(vmx->vcpu.kvm))
+ vmx->nested.nested_vmx_pinbased_ctls_high |=
+ PIN_BASED_POSTED_INTR;
/* exit controls */
rdmsr(MSR_IA32_VMX_EXIT_CTLS,
@@ -4312,6 +4329,64 @@ static int vmx_vm_has_apicv(struct kvm *kvm)
return enable_apicv && irqchip_in_kernel(kvm);
}
+static int vmx_complete_nested_posted_interrupt(struct kvm_vcpu *vcpu)
+{
+ struct vcpu_vmx *vmx = to_vmx(vcpu);
+ int max_irr;
+ void *vapic_page;
+ u16 status;
+
+ if (vmx->nested.pi_desc &&
+ vmx->nested.pi_pending) {
+ vmx->nested.pi_pending = false;
+ if (!pi_test_and_clear_on(vmx->nested.pi_desc))
+ return 0;
+
+ max_irr = find_last_bit(
+ (unsigned long *)vmx->nested.pi_desc->pir, 256);
+
+ if (max_irr == 256)
+ return 0;
+
+ vapic_page = kmap(vmx->nested.virtual_apic_page);
+ if (!vapic_page) {
+ WARN_ON(1);
+ return -ENOMEM;
+ }
+ __kvm_apic_update_irr(vmx->nested.pi_desc->pir, vapic_page);
+ kunmap(vmx->nested.virtual_apic_page);
+
+ status = vmcs_read16(GUEST_INTR_STATUS);
+ if ((u8)max_irr > ((u8)status & 0xff)) {
+ status &= ~0xff;
+ status |= (u8)max_irr;
+ vmcs_write16(GUEST_INTR_STATUS, status);
+ }
+ }
+ return 0;
+}
+
+static int vmx_deliver_nested_posted_interrupt(struct kvm_vcpu *vcpu,
+ int vector)
+{
+ struct vcpu_vmx *vmx = to_vmx(vcpu);
+
+ if (is_guest_mode(vcpu) &&
+ vector == vmx->nested.posted_intr_nv) {
+ /* the PIR and ON have been set by L1. */
+ if (vcpu->mode == IN_GUEST_MODE)
+ apic->send_IPI_mask(get_cpu_mask(vcpu->cpu),
+ POSTED_INTR_VECTOR);
+ /*
+ * If a posted intr is not recognized by hardware,
+ * we will accomplish it in the next vmentry.
+ */
+ vmx->nested.pi_pending = true;
+ kvm_make_request(KVM_REQ_EVENT, vcpu);
+ return 0;
+ }
+ return -1;
+}
/*
* Send interrupt to vcpu via posted interrupt way.
* 1. If target vcpu is running(non-root mode), send posted interrupt
@@ -4324,6 +4399,10 @@ static void vmx_deliver_posted_interrupt(struct kvm_vcpu *vcpu, int vector)
struct vcpu_vmx *vmx = to_vmx(vcpu);
int r;
+ r = vmx_deliver_nested_posted_interrupt(vcpu, vector);
+ if (!r)
+ return;
+
if (pi_test_and_set_pir(vector, &vmx->pi_desc))
return;
@@ -6585,6 +6664,7 @@ static inline void nested_release_vmcs12(struct vcpu_vmx *vmx)
vmcs_write32(SECONDARY_VM_EXEC_CONTROL, exec_control);
vmcs_write64(VMCS_LINK_POINTER, -1ull);
}
+ vmx->nested.posted_intr_nv = -1;
kunmap(vmx->nested.current_vmcs12_page);
nested_release_page(vmx->nested.current_vmcs12_page);
vmx->nested.current_vmptr = -1ull;
@@ -6613,6 +6693,12 @@ static void free_nested(struct vcpu_vmx *vmx)
nested_release_page(vmx->nested.virtual_apic_page);
vmx->nested.virtual_apic_page = NULL;
}
+ if (vmx->nested.pi_desc_page) {
+ kunmap(vmx->nested.pi_desc_page);
+ nested_release_page(vmx->nested.pi_desc_page);
+ vmx->nested.pi_desc_page = NULL;
+ vmx->nested.pi_desc = NULL;
+ }
nested_free_all_saved_vmcss(vmx);
}
@@ -8320,6 +8406,7 @@ static struct kvm_vcpu *vmx_create_vcpu(struct kvm *kvm, unsigned int id)
if (nested)
nested_vmx_setup_ctls_msrs(vmx);
+ vmx->nested.posted_intr_nv = -1;
vmx->nested.current_vmptr = -1ull;
vmx->nested.current_vmcs12 = NULL;
@@ -8565,6 +8652,31 @@ static bool nested_get_vmcs12_pages(struct kvm_vcpu *vcpu,
return false;
}
+ if (nested_cpu_has_posted_intr(vmcs12)) {
+ if (!IS_ALIGNED(vmcs12->posted_intr_desc_addr, 64))
+ return false;
+
+ if (vmx->nested.pi_desc_page) { /* shouldn't happen */
+ kunmap(vmx->nested.pi_desc_page);
+ nested_release_page(vmx->nested.pi_desc_page);
+ }
+ vmx->nested.pi_desc_page =
+ nested_get_page(vcpu, vmcs12->posted_intr_desc_addr);
+ if (!vmx->nested.pi_desc_page)
+ return false;
+
+ vmx->nested.pi_desc =
+ (struct pi_desc *)kmap(vmx->nested.pi_desc_page);
+ if (!vmx->nested.pi_desc) {
+ nested_release_page_clean(vmx->nested.pi_desc_page);
+ return false;
+ }
+ vmx->nested.pi_desc =
+ (struct pi_desc *)((void *)vmx->nested.pi_desc +
+ (unsigned long)(vmcs12->posted_intr_desc_addr &
+ (PAGE_SIZE - 1)));
+ }
+
return true;
}
@@ -8700,7 +8812,8 @@ static int nested_vmx_check_apicv_controls(struct kvm_vcpu *vcpu,
{
if (!nested_cpu_has_virt_x2apic_mode(vmcs12) &&
!nested_cpu_has_apic_reg_virt(vmcs12) &&
- !nested_cpu_has_vid(vmcs12))
+ !nested_cpu_has_vid(vmcs12) &&
+ !nested_cpu_has_posted_intr(vmcs12))
return 0;
/*
@@ -8719,6 +8832,17 @@ static int nested_vmx_check_apicv_controls(struct kvm_vcpu *vcpu,
!nested_exit_on_intr(vcpu))
return -EINVAL;
+ /*
+ * bits 15:8 should be zero in posted_intr_nv,
+ * the descriptor address has been already checked
+ * in nested_get_vmcs12_pages.
+ */
+ if (nested_cpu_has_posted_intr(vmcs12) &&
+ (!nested_cpu_has_vid(vmcs12) ||
+ !nested_exit_intr_ack_set(vcpu) ||
+ vmcs12->posted_intr_nv & 0xff00))
+ return -EINVAL;
+
/* tpr shadow is needed by all apicv features. */
if (!nested_cpu_has(vmcs12, CPU_BASED_TPR_SHADOW))
return -EINVAL;
@@ -8961,8 +9085,23 @@ static void prepare_vmcs02(struct kvm_vcpu *vcpu, struct vmcs12 *vmcs12)
exec_control = vmcs12->pin_based_vm_exec_control;
exec_control |= vmcs_config.pin_based_exec_ctrl;
- exec_control &= ~(PIN_BASED_VMX_PREEMPTION_TIMER |
- PIN_BASED_POSTED_INTR);
+ exec_control &= ~PIN_BASED_VMX_PREEMPTION_TIMER;
+
+ if (nested_cpu_has_posted_intr(vmcs12)) {
+ /*
+ * Note that we use L0's vector here and in
+ * vmx_deliver_nested_posted_interrupt.
+ */
+ vmx->nested.posted_intr_nv = vmcs12->posted_intr_nv;
+ vmx->nested.pi_pending = false;
+ vmcs_write64(POSTED_INTR_NV, POSTED_INTR_VECTOR);
+ vmcs_write64(POSTED_INTR_DESC_ADDR,
+ page_to_phys(vmx->nested.pi_desc_page) +
+ (unsigned long)(vmcs12->posted_intr_desc_addr &
+ (PAGE_SIZE - 1)));
+ } else
+ exec_control &= ~PIN_BASED_POSTED_INTR;
+
vmcs_write32(PIN_BASED_VM_EXEC_CONTROL, exec_control);
vmx->nested.preemption_timer_expired = false;
@@ -9498,9 +9637,10 @@ static int vmx_check_nested_events(struct kvm_vcpu *vcpu, bool external_intr)
if (vmx->nested.nested_run_pending)
return -EBUSY;
nested_vmx_vmexit(vcpu, EXIT_REASON_EXTERNAL_INTERRUPT, 0, 0);
+ return 0;
}
- return 0;
+ return vmx_complete_nested_posted_interrupt(vcpu);
}
static u32 vmx_get_preemption_timer_value(struct kvm_vcpu *vcpu)
@@ -9878,6 +10018,12 @@ static void nested_vmx_vmexit(struct kvm_vcpu *vcpu, u32 exit_reason,
nested_release_page(vmx->nested.virtual_apic_page);
vmx->nested.virtual_apic_page = NULL;
}
+ if (vmx->nested.pi_desc_page) {
+ kunmap(vmx->nested.pi_desc_page);
+ nested_release_page(vmx->nested.pi_desc_page);
+ vmx->nested.pi_desc_page = NULL;
+ vmx->nested.pi_desc = NULL;
+ }
/*
* We are now running in L2, mmu_notifier will force to reload the
generated by cgit v1.2.3 (git 2.39.0) at 2024-11-14 06:39:12 +0300