Add new KVM exit reason KVM_EXIT_DIRTY_LOG_FULL.
Signed-off-by: Lei Cao <lei.cao@xxxxxxxxxxx>
---
arch/x86/include/asm/kvm_host.h | 3 +++
arch/x86/kvm/mmu.c | 7 +++++++
arch/x86/kvm/vmx.c | 7 +++++++
arch/x86/kvm/x86.c | 6 ++++++
include/linux/kvm_host.h | 1 +
include/uapi/linux/kvm.h | 1 +
6 files changed, 25 insertions(+)
diff --git a/arch/x86/include/asm/kvm_host.h b/arch/x86/include/asm/kvm_host.h
index 6646aa5..c5e164d 100644
--- a/arch/x86/include/asm/kvm_host.h
+++ b/arch/x86/include/asm/kvm_host.h
@@ -1002,6 +1002,7 @@ struct kvm_x86_ops {
void (*enable_log_dirty_pt_masked)(struct kvm *kvm,
struct kvm_memory_slot *slot,
gfn_t offset, unsigned long mask);
+ int (*cpu_dirty_log_size)(void);
/* pmu operations of sub-arch */
const struct kvm_pmu_ops *pmu_ops;
@@ -1408,4 +1409,6 @@ static inline int kvm_cpu_get_apicid(int mps_cpu)
#endif
}
+int kvm_cpu_dirty_log_size(void);
+
#endif /* _ASM_X86_KVM_HOST_H */
diff --git a/arch/x86/kvm/mmu.c b/arch/x86/kvm/mmu.c
index 7012de4..dd34ac6 100644
--- a/arch/x86/kvm/mmu.c
+++ b/arch/x86/kvm/mmu.c
@@ -1357,6 +1357,13 @@ void kvm_arch_mmu_enable_log_dirty_pt_masked(struct kvm *kvm,
kvm_mmu_write_protect_pt_masked(kvm, slot, gfn_offset, mask);
}
+int kvm_cpu_dirty_log_size(void)
+{
+ if (kvm_x86_ops->cpu_dirty_log_size)
+ return kvm_x86_ops->cpu_dirty_log_size();
+ return 0;
+}
+
bool kvm_mmu_slot_gfn_write_protect(struct kvm *kvm,
struct kvm_memory_slot *slot, u64 gfn)
{
diff --git a/arch/x86/kvm/vmx.c b/arch/x86/kvm/vmx.c
index a236dec..0e11510 100644
--- a/arch/x86/kvm/vmx.c
+++ b/arch/x86/kvm/vmx.c
@@ -6723,6 +6723,7 @@ static __init int hardware_setup(void)
kvm_x86_ops->slot_disable_log_dirty = NULL;
kvm_x86_ops->flush_log_dirty = NULL;
kvm_x86_ops->enable_log_dirty_pt_masked = NULL;
+ kvm_x86_ops->cpu_dirty_log_size = NULL;
}
if (cpu_has_vmx_preemption_timer() && enable_preemption_timer) {
@@ -11497,6 +11498,11 @@ static void vmx_setup_mce(struct kvm_vcpu *vcpu)
~FEATURE_CONTROL_LMCE;
}
+static int vmx_cpu_dirty_log_size(void)
+{
+ return PML_ENTITY_NUM;
+}
+
static struct kvm_x86_ops vmx_x86_ops __ro_after_init = {
.cpu_has_kvm_support = cpu_has_kvm_support,
.disabled_by_bios = vmx_disabled_by_bios,
@@ -11611,6 +11617,7 @@ static struct kvm_x86_ops vmx_x86_ops __ro_after_init = {
.slot_disable_log_dirty = vmx_slot_disable_log_dirty,
.flush_log_dirty = vmx_flush_log_dirty,
.enable_log_dirty_pt_masked = vmx_enable_log_dirty_pt_masked,
+ .cpu_dirty_log_size = vmx_cpu_dirty_log_size,
.pre_block = vmx_pre_block,
.post_block = vmx_post_block,
diff --git a/arch/x86/kvm/x86.c b/arch/x86/kvm/x86.c
index 240fb75..24dcefd 100644
--- a/arch/x86/kvm/x86.c
+++ b/arch/x86/kvm/x86.c
@@ -6706,6 +6706,12 @@ static int vcpu_enter_guest(struct kvm_vcpu *vcpu)
*/
if (kvm_check_request(KVM_REQ_HV_STIMER, vcpu))
kvm_hv_process_stimers(vcpu);
+
+ if (kvm_check_request(KVM_REQ_EXIT_DIRTY_LOG_FULL, vcpu)) {
+ vcpu->run->exit_reason = KVM_EXIT_DIRTY_LOG_FULL;
+ r = -EINTR;
+ goto out;
+ }
}
/*
diff --git a/include/linux/kvm_host.h b/include/linux/kvm_host.h
index 33d9974..b0783da 100644
--- a/include/linux/kvm_host.h
+++ b/include/linux/kvm_host.h
@@ -123,6 +123,7 @@ static inline bool is_error_page(struct page *page)
#define KVM_REQ_MMU_RELOAD 1
#define KVM_REQ_PENDING_TIMER 2
#define KVM_REQ_UNHALT 3
+#define KVM_REQ_EXIT_DIRTY_LOG_FULL 4
#define KVM_USERSPACE_IRQ_SOURCE_ID 0
#define KVM_IRQFD_RESAMPLE_IRQ_SOURCE_ID 1
diff --git a/include/uapi/linux/kvm.h b/include/uapi/linux/kvm.h
index 1a1ba4d..ec6c13f 100644
--- a/include/uapi/linux/kvm.h
+++ b/include/uapi/linux/kvm.h
@@ -205,6 +205,7 @@ struct kvm_hyperv_exit {
#define KVM_EXIT_S390_STSI 25
#define KVM_EXIT_IOAPIC_EOI 26
#define KVM_EXIT_HYPERV 27
+#define KVM_EXIT_DIRTY_LOG_FULL 28
/* For KVM_EXIT_INTERNAL_ERROR */
/* Emulate instruction failed. */
--
2.5.0
