Merge tag 'kvm-4.14-1' of git://git.kernel.org/pub/scm/virt/kvm/kvm

Pull KVM updates from Radim Krčmář:
 "First batch of KVM changes for 4.14

  Common:
   - improve heuristic for boosting preempted spinlocks by ignoring
     VCPUs in user mode

  ARM:
   - fix for decoding external abort types from guests

   - added support for migrating the active priority of interrupts when
     running a GICv2 guest on a GICv3 host

   - minor cleanup

  PPC:
   - expose storage keys to userspace

   - merge kvm-ppc-fixes with a fix that missed 4.13 because of
     vacations

   - fixes

  s390:
   - merge of kvm/master to avoid conflicts with additional sthyi fixes

   - wire up the no-dat enhancements in KVM

   - multiple epoch facility (z14 feature)

   - Configuration z/Architecture Mode

   - more sthyi fixes

   - gdb server range checking fix

   - small code cleanups

  x86:
   - emulate Hyper-V TSC frequency MSRs

   - add nested INVPCID

   - emulate EPTP switching VMFUNC

   - support Virtual GIF

   - support 5 level page tables

   - speedup nested VM exits by packing byte operations

   - speedup MMIO by using hardware provided physical address

   - a lot of fixes and cleanups, especially nested"

* tag 'kvm-4.14-1' of git://git.kernel.org/pub/scm/virt/kvm/kvm: (67 commits)
  KVM: arm/arm64: Support uaccess of GICC_APRn
  KVM: arm/arm64: Extract GICv3 max APRn index calculation
  KVM: arm/arm64: vITS: Drop its_ite->lpi field
  KVM: arm/arm64: vgic: constify seq_operations and file_operations
  KVM: arm/arm64: Fix guest external abort matching
  KVM: PPC: Book3S HV: Fix memory leak in kvm_vm_ioctl_get_htab_fd
  KVM: s390: vsie: cleanup mcck reinjection
  KVM: s390: use WARN_ON_ONCE only for checking
  KVM: s390: guestdbg: fix range check
  KVM: PPC: Book3S HV: Report storage key support to userspace
  KVM: PPC: Book3S HV: Fix case where HDEC is treated as 32-bit on POWER9
  KVM: PPC: Book3S HV: Fix invalid use of register expression
  KVM: PPC: Book3S HV: Fix H_REGISTER_VPA VPA size validation
  KVM: PPC: Book3S HV: Fix setting of storage key in H_ENTER
  KVM: PPC: e500mc: Fix a NULL dereference
  KVM: PPC: e500: Fix some NULL dereferences on error
  KVM: PPC: Book3S HV: Protect updates to spapr_tce_tables list
  KVM: s390: we are always in czam mode
  KVM: s390: expose no-DAT to guest and migration support
  KVM: s390: sthyi: remove invalid guest write access
  ...

1 files changed, 24 insertions, 10 deletions

diff --git a/arch/x86/kvm/cpuid.c b/arch/x86/kvm/cpuid.c
index 19adbb418443..0099e10eb045 100644
--- a/arch/x86/kvm/cpuid.c
+++ b/arch/x86/kvm/cpuid.c
@@ -126,16 +126,20 @@ int kvm_update_cpuid(struct kvm_vcpu *vcpu)
 		best->ebx = xstate_required_size(vcpu->arch.xcr0, true);
 
 	/*
-	 * The existing code assumes virtual address is 48-bit in the canonical
-	 * address checks; exit if it is ever changed.
+	 * The existing code assumes virtual address is 48-bit or 57-bit in the
+	 * canonical address checks; exit if it is ever changed.
 	 */
 	best = kvm_find_cpuid_entry(vcpu, 0x80000008, 0);
-	if (best && ((best->eax & 0xff00) >> 8) != 48 &&
-		((best->eax & 0xff00) >> 8) != 0)
-		return -EINVAL;
+	if (best) {
+		int vaddr_bits = (best->eax & 0xff00) >> 8;
+
+		if (vaddr_bits != 48 && vaddr_bits != 57 && vaddr_bits != 0)
+			return -EINVAL;
+	}
 
 	/* Update physical-address width */
 	vcpu->arch.maxphyaddr = cpuid_query_maxphyaddr(vcpu);
+	kvm_mmu_reset_context(vcpu);
 
 	kvm_pmu_refresh(vcpu);
 	return 0;
@@ -383,7 +387,8 @@ static inline int __do_cpuid_ent(struct kvm_cpuid_entry2 *entry, u32 function,
 
 	/* cpuid 7.0.ecx*/
 	const u32 kvm_cpuid_7_0_ecx_x86_features =
-		F(AVX512VBMI) | F(PKU) | 0 /*OSPKE*/ | F(AVX512_VPOPCNTDQ);
+		F(AVX512VBMI) | F(LA57) | F(PKU) |
+		0 /*OSPKE*/ | F(AVX512_VPOPCNTDQ);
 
 	/* cpuid 7.0.edx*/
 	const u32 kvm_cpuid_7_0_edx_x86_features =
@@ -853,16 +858,24 @@ static struct kvm_cpuid_entry2* check_cpuid_limit(struct kvm_vcpu *vcpu,
 	return kvm_find_cpuid_entry(vcpu, maxlevel->eax, index);
 }
 
-void kvm_cpuid(struct kvm_vcpu *vcpu, u32 *eax, u32 *ebx, u32 *ecx, u32 *edx)
+bool kvm_cpuid(struct kvm_vcpu *vcpu, u32 *eax, u32 *ebx,
+	       u32 *ecx, u32 *edx, bool check_limit)
 {
 	u32 function = *eax, index = *ecx;
 	struct kvm_cpuid_entry2 *best;
+	bool entry_found = true;
 
 	best = kvm_find_cpuid_entry(vcpu, function, index);
 
-	if (!best)
+	if (!best) {
+		entry_found = false;
+		if (!check_limit)
+			goto out;
+
 		best = check_cpuid_limit(vcpu, function, index);
+	}
 
+out:
 	if (best) {
 		*eax = best->eax;
 		*ebx = best->ebx;
@@ -870,7 +883,8 @@ void kvm_cpuid(struct kvm_vcpu *vcpu, u32 *eax, u32 *ebx, u32 *ecx, u32 *edx)
 		*edx = best->edx;
 	} else
 		*eax = *ebx = *ecx = *edx = 0;
-	trace_kvm_cpuid(function, *eax, *ebx, *ecx, *edx);
+	trace_kvm_cpuid(function, *eax, *ebx, *ecx, *edx, entry_found);
+	return entry_found;
 }
 EXPORT_SYMBOL_GPL(kvm_cpuid);
 
@@ -883,7 +897,7 @@ int kvm_emulate_cpuid(struct kvm_vcpu *vcpu)
 
 	eax = kvm_register_read(vcpu, VCPU_REGS_RAX);
 	ecx = kvm_register_read(vcpu, VCPU_REGS_RCX);
-	kvm_cpuid(vcpu, &eax, &ebx, &ecx, &edx);
+	kvm_cpuid(vcpu, &eax, &ebx, &ecx, &edx, true);
 	kvm_register_write(vcpu, VCPU_REGS_RAX, eax);
 	kvm_register_write(vcpu, VCPU_REGS_RBX, ebx);
 	kvm_register_write(vcpu, VCPU_REGS_RCX, ecx);