aboutsummaryrefslogtreecommitdiff
path: root/arch/x86/kvm/hyperv.c
diff options
context:
space:
mode:
Diffstat (limited to 'arch/x86/kvm/hyperv.c')
-rw-r--r--arch/x86/kvm/hyperv.c85
1 files changed, 55 insertions, 30 deletions
diff --git a/arch/x86/kvm/hyperv.c b/arch/x86/kvm/hyperv.c
index 1572c35b4f1a..337b6d2730fa 100644
--- a/arch/x86/kvm/hyperv.c
+++ b/arch/x86/kvm/hyperv.c
@@ -28,6 +28,8 @@
#include <linux/kvm_host.h>
#include <linux/highmem.h>
+#include <linux/sched/cputime.h>
+
#include <asm/apicdef.h>
#include <trace/events/kvm.h>
@@ -104,14 +106,27 @@ static int synic_set_sint(struct kvm_vcpu_hv_synic *synic, int sint,
return 0;
}
-static struct kvm_vcpu_hv_synic *synic_get(struct kvm *kvm, u32 vcpu_id)
+static struct kvm_vcpu *get_vcpu_by_vpidx(struct kvm *kvm, u32 vpidx)
+{
+ struct kvm_vcpu *vcpu = NULL;
+ int i;
+
+ if (vpidx < KVM_MAX_VCPUS)
+ vcpu = kvm_get_vcpu(kvm, vpidx);
+ if (vcpu && vcpu_to_hv_vcpu(vcpu)->vp_index == vpidx)
+ return vcpu;
+ kvm_for_each_vcpu(i, vcpu, kvm)
+ if (vcpu_to_hv_vcpu(vcpu)->vp_index == vpidx)
+ return vcpu;
+ return NULL;
+}
+
+static struct kvm_vcpu_hv_synic *synic_get(struct kvm *kvm, u32 vpidx)
{
struct kvm_vcpu *vcpu;
struct kvm_vcpu_hv_synic *synic;
- if (vcpu_id >= atomic_read(&kvm->online_vcpus))
- return NULL;
- vcpu = kvm_get_vcpu(kvm, vcpu_id);
+ vcpu = get_vcpu_by_vpidx(kvm, vpidx);
if (!vcpu)
return NULL;
synic = vcpu_to_synic(vcpu);
@@ -219,7 +234,8 @@ static int synic_set_msr(struct kvm_vcpu_hv_synic *synic,
synic->version = data;
break;
case HV_X64_MSR_SIEFP:
- if (data & HV_SYNIC_SIEFP_ENABLE)
+ if ((data & HV_SYNIC_SIEFP_ENABLE) && !host &&
+ !synic->dont_zero_synic_pages)
if (kvm_clear_guest(vcpu->kvm,
data & PAGE_MASK, PAGE_SIZE)) {
ret = 1;
@@ -230,7 +246,8 @@ static int synic_set_msr(struct kvm_vcpu_hv_synic *synic,
synic_exit(synic, msr);
break;
case HV_X64_MSR_SIMP:
- if (data & HV_SYNIC_SIMP_ENABLE)
+ if ((data & HV_SYNIC_SIMP_ENABLE) && !host &&
+ !synic->dont_zero_synic_pages)
if (kvm_clear_guest(vcpu->kvm,
data & PAGE_MASK, PAGE_SIZE)) {
ret = 1;
@@ -305,22 +322,22 @@ static int synic_set_irq(struct kvm_vcpu_hv_synic *synic, u32 sint)
return -ENOENT;
memset(&irq, 0, sizeof(irq));
- irq.dest_id = kvm_apic_id(vcpu->arch.apic);
+ irq.shorthand = APIC_DEST_SELF;
irq.dest_mode = APIC_DEST_PHYSICAL;
irq.delivery_mode = APIC_DM_FIXED;
irq.vector = vector;
irq.level = 1;
- ret = kvm_irq_delivery_to_apic(vcpu->kvm, NULL, &irq, NULL);
+ ret = kvm_irq_delivery_to_apic(vcpu->kvm, vcpu->arch.apic, &irq, NULL);
trace_kvm_hv_synic_set_irq(vcpu->vcpu_id, sint, irq.vector, ret);
return ret;
}
-int kvm_hv_synic_set_irq(struct kvm *kvm, u32 vcpu_id, u32 sint)
+int kvm_hv_synic_set_irq(struct kvm *kvm, u32 vpidx, u32 sint)
{
struct kvm_vcpu_hv_synic *synic;
- synic = synic_get(kvm, vcpu_id);
+ synic = synic_get(kvm, vpidx);
if (!synic)
return -EINVAL;
@@ -339,11 +356,11 @@ void kvm_hv_synic_send_eoi(struct kvm_vcpu *vcpu, int vector)
kvm_hv_notify_acked_sint(vcpu, i);
}
-static int kvm_hv_set_sint_gsi(struct kvm *kvm, u32 vcpu_id, u32 sint, int gsi)
+static int kvm_hv_set_sint_gsi(struct kvm *kvm, u32 vpidx, u32 sint, int gsi)
{
struct kvm_vcpu_hv_synic *synic;
- synic = synic_get(kvm, vcpu_id);
+ synic = synic_get(kvm, vpidx);
if (!synic)
return -EINVAL;
@@ -632,9 +649,10 @@ void kvm_hv_process_stimers(struct kvm_vcpu *vcpu)
}
if ((stimer->config & HV_STIMER_ENABLE) &&
- stimer->count)
- stimer_start(stimer);
- else
+ stimer->count) {
+ if (!stimer->msg_pending)
+ stimer_start(stimer);
+ } else
stimer_cleanup(stimer);
}
}
@@ -685,14 +703,24 @@ void kvm_hv_vcpu_init(struct kvm_vcpu *vcpu)
stimer_init(&hv_vcpu->stimer[i], i);
}
-int kvm_hv_activate_synic(struct kvm_vcpu *vcpu)
+void kvm_hv_vcpu_postcreate(struct kvm_vcpu *vcpu)
+{
+ struct kvm_vcpu_hv *hv_vcpu = vcpu_to_hv_vcpu(vcpu);
+
+ hv_vcpu->vp_index = kvm_vcpu_get_idx(vcpu);
+}
+
+int kvm_hv_activate_synic(struct kvm_vcpu *vcpu, bool dont_zero_synic_pages)
{
+ struct kvm_vcpu_hv_synic *synic = vcpu_to_synic(vcpu);
+
/*
* Hyper-V SynIC auto EOI SINT's are
* not compatible with APICV, so deactivate APICV
*/
kvm_vcpu_deactivate_apicv(vcpu);
- vcpu_to_synic(vcpu)->active = true;
+ synic->active = true;
+ synic->dont_zero_synic_pages = dont_zero_synic_pages;
return 0;
}
@@ -964,10 +992,11 @@ static int kvm_hv_set_msr_pw(struct kvm_vcpu *vcpu, u32 msr, u64 data,
/* Calculate cpu time spent by current task in 100ns units */
static u64 current_task_runtime_100ns(void)
{
- cputime_t utime, stime;
+ u64 utime, stime;
task_cputime_adjusted(current, &utime, &stime);
- return div_u64(cputime_to_nsecs(utime + stime), 100);
+
+ return div_u64(utime + stime, 100);
}
static int kvm_hv_set_msr(struct kvm_vcpu *vcpu, u32 msr, u64 data, bool host)
@@ -975,6 +1004,11 @@ static int kvm_hv_set_msr(struct kvm_vcpu *vcpu, u32 msr, u64 data, bool host)
struct kvm_vcpu_hv *hv = &vcpu->arch.hyperv;
switch (msr) {
+ case HV_X64_MSR_VP_INDEX:
+ if (!host)
+ return 1;
+ hv->vp_index = (u32)data;
+ break;
case HV_X64_MSR_APIC_ASSIST_PAGE: {
u64 gfn;
unsigned long addr;
@@ -1086,18 +1120,9 @@ static int kvm_hv_get_msr(struct kvm_vcpu *vcpu, u32 msr, u64 *pdata)
struct kvm_vcpu_hv *hv = &vcpu->arch.hyperv;
switch (msr) {
- case HV_X64_MSR_VP_INDEX: {
- int r;
- struct kvm_vcpu *v;
-
- kvm_for_each_vcpu(r, v, vcpu->kvm) {
- if (v == vcpu) {
- data = r;
- break;
- }
- }
+ case HV_X64_MSR_VP_INDEX:
+ data = hv->vp_index;
break;
- }
case HV_X64_MSR_EOI:
return kvm_hv_vapic_msr_read(vcpu, APIC_EOI, pdata);
case HV_X64_MSR_ICR:
Powered by cgit, Gruvboxed by Blaster4385.