Commit b0a75281 authored by Linus Torvalds's avatar Linus Torvalds
Browse files

Merge tag 'for-linus' of git://git.kernel.org/pub/scm/virt/kvm/kvm 

Pull KVM fixes from Radim Krčmář:
 "A bunch of small fixes for x86"

* tag 'for-linus' of git://git.kernel.org/pub/scm/virt/kvm/kvm:
  kvm: x86: hyperv: avoid livelock in oneshot SynIC timers
  KVM: VMX: Fix invalid guest state detection after task-switch emulation
  x86: add MULTIUSER dependency for KVM
  KVM: nVMX: Disallow VM-entry in MOV-SS shadow
  KVM: nVMX: track NMI blocking state separately for each VMCS
  KVM: x86: masking out upper bits
parents 10fc9554 f1ff89ec

arch/x86/kvm/Kconfig

+1 −1
Original line number Diff line number Diff line
@@ -22,7 +22,7 @@ config KVM 
	depends on HAVE_KVM

	depends on HIGH_RES_TIMERS

	# for TASKSTATS/TASK_DELAY_ACCT:

	depends on NET

	depends on NET && MULTIUSER

	select PREEMPT_NOTIFIERS

	select MMU_NOTIFIER

	select ANON_INODES

arch/x86/kvm/hyperv.c

+4 −3
Original line number Diff line number Diff line
@@ -649,9 +649,10 @@ void kvm_hv_process_stimers(struct kvm_vcpu *vcpu) 
				}



				if ((stimer->config & HV_STIMER_ENABLE) &&

				    stimer->count)

				    stimer->count) {

					if (!stimer->msg_pending)

						stimer_start(stimer);

				else

				} else

					stimer_cleanup(stimer);

			}

		}

arch/x86/kvm/vmx.c

+31 −15
Original line number Diff line number Diff line
@@ -198,7 +198,8 @@ struct loaded_vmcs { 
	struct vmcs *vmcs;

	struct vmcs *shadow_vmcs;

	int cpu;

	int launched;

	bool launched;

	bool nmi_known_unmasked;

	struct list_head loaded_vmcss_on_cpu_link;

};
@@ -2326,6 +2327,11 @@ static void vmx_vcpu_put(struct kvm_vcpu *vcpu) 
	__vmx_load_host_state(to_vmx(vcpu));

}



static bool emulation_required(struct kvm_vcpu *vcpu)

{

	return emulate_invalid_guest_state && !guest_state_valid(vcpu);

}



static void vmx_decache_cr0_guest_bits(struct kvm_vcpu *vcpu);



/*
@@ -2363,6 +2369,8 @@ static unsigned long vmx_get_rflags(struct kvm_vcpu *vcpu) 


static void vmx_set_rflags(struct kvm_vcpu *vcpu, unsigned long rflags)

{

	unsigned long old_rflags = vmx_get_rflags(vcpu);



	__set_bit(VCPU_EXREG_RFLAGS, (ulong *)&vcpu->arch.regs_avail);

	to_vmx(vcpu)->rflags = rflags;

	if (to_vmx(vcpu)->rmode.vm86_active) {
@@ -2370,6 +2378,9 @@ static void vmx_set_rflags(struct kvm_vcpu *vcpu, unsigned long rflags) 
		rflags |= X86_EFLAGS_IOPL | X86_EFLAGS_VM;

	}

	vmcs_writel(GUEST_RFLAGS, rflags);



	if ((old_rflags ^ to_vmx(vcpu)->rflags) & X86_EFLAGS_VM)

		to_vmx(vcpu)->emulation_required = emulation_required(vcpu);

}



static u32 vmx_get_pkru(struct kvm_vcpu *vcpu)
@@ -3857,11 +3868,6 @@ static __init int alloc_kvm_area(void) 
	return 0;

}



static bool emulation_required(struct kvm_vcpu *vcpu)

{

	return emulate_invalid_guest_state && !guest_state_valid(vcpu);

}



static void fix_pmode_seg(struct kvm_vcpu *vcpu, int seg,

		struct kvm_segment *save)

{
@@ -5510,10 +5516,8 @@ static void vmx_inject_nmi(struct kvm_vcpu *vcpu) 
{

	struct vcpu_vmx *vmx = to_vmx(vcpu);



	if (!is_guest_mode(vcpu)) {

	++vcpu->stat.nmi_injections;

		vmx->nmi_known_unmasked = false;

	}

	vmx->loaded_vmcs->nmi_known_unmasked = false;



	if (vmx->rmode.vm86_active) {

		if (kvm_inject_realmode_interrupt(vcpu, NMI_VECTOR, 0) != EMULATE_DONE)
@@ -5527,16 +5531,21 @@ static void vmx_inject_nmi(struct kvm_vcpu *vcpu) 


static bool vmx_get_nmi_mask(struct kvm_vcpu *vcpu)

{

	if (to_vmx(vcpu)->nmi_known_unmasked)

	struct vcpu_vmx *vmx = to_vmx(vcpu);

	bool masked;



	if (vmx->loaded_vmcs->nmi_known_unmasked)

		return false;

	return vmcs_read32(GUEST_INTERRUPTIBILITY_INFO)	& GUEST_INTR_STATE_NMI;

	masked = vmcs_read32(GUEST_INTERRUPTIBILITY_INFO) & GUEST_INTR_STATE_NMI;

	vmx->loaded_vmcs->nmi_known_unmasked = !masked;

	return masked;

}



static void vmx_set_nmi_mask(struct kvm_vcpu *vcpu, bool masked)

{

	struct vcpu_vmx *vmx = to_vmx(vcpu);



	vmx->nmi_known_unmasked = !masked;

	vmx->loaded_vmcs->nmi_known_unmasked = !masked;

	if (masked)

		vmcs_set_bits(GUEST_INTERRUPTIBILITY_INFO,

			      GUEST_INTR_STATE_NMI);
@@ -8736,7 +8745,7 @@ static void vmx_recover_nmi_blocking(struct vcpu_vmx *vmx) 


	idtv_info_valid = vmx->idt_vectoring_info & VECTORING_INFO_VALID_MASK;



	if (vmx->nmi_known_unmasked)

	if (vmx->loaded_vmcs->nmi_known_unmasked)

		return;

	/*

	 * Can't use vmx->exit_intr_info since we're not sure what
@@ -8760,7 +8769,7 @@ static void vmx_recover_nmi_blocking(struct vcpu_vmx *vmx) 
		vmcs_set_bits(GUEST_INTERRUPTIBILITY_INFO,

			      GUEST_INTR_STATE_NMI);

	else

		vmx->nmi_known_unmasked =

		vmx->loaded_vmcs->nmi_known_unmasked =

			!(vmcs_read32(GUEST_INTERRUPTIBILITY_INFO)

			  & GUEST_INTR_STATE_NMI);

}
@@ -10488,6 +10497,7 @@ static int nested_vmx_run(struct kvm_vcpu *vcpu, bool launch) 
{

	struct vmcs12 *vmcs12;

	struct vcpu_vmx *vmx = to_vmx(vcpu);

	u32 interrupt_shadow = vmx_get_interrupt_shadow(vcpu);

	u32 exit_qual;

	int ret;
@@ -10512,6 +10522,12 @@ static int nested_vmx_run(struct kvm_vcpu *vcpu, bool launch) 
	 * for misconfigurations which will anyway be caught by the processor

	 * when using the merged vmcs02.

	 */

	if (interrupt_shadow & KVM_X86_SHADOW_INT_MOV_SS) {

		nested_vmx_failValid(vcpu,

				     VMXERR_ENTRY_EVENTS_BLOCKED_BY_MOV_SS);

		goto out;

	}



	if (vmcs12->launch_state == launch) {

		nested_vmx_failValid(vcpu,

			launch ? VMXERR_VMLAUNCH_NONCLEAR_VMCS

arch/x86/kvm/x86.c

+2 −2
Original line number Diff line number Diff line
@@ -597,8 +597,8 @@ bool pdptrs_changed(struct kvm_vcpu *vcpu) 
		      (unsigned long *)&vcpu->arch.regs_avail))

		return true;



	gfn = (kvm_read_cr3(vcpu) & ~31u) >> PAGE_SHIFT;

	offset = (kvm_read_cr3(vcpu) & ~31u) & (PAGE_SIZE - 1);

	gfn = (kvm_read_cr3(vcpu) & ~31ul) >> PAGE_SHIFT;

	offset = (kvm_read_cr3(vcpu) & ~31ul) & (PAGE_SIZE - 1);

	r = kvm_read_nested_guest_page(vcpu, gfn, pdpte, offset, sizeof(pdpte),

				       PFERR_USER_MASK | PFERR_WRITE_MASK);

	if (r < 0)

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