Merge remote-tracking branch 'kvm/next' into kvm-next-5.20

KVM/s390, KVM/x86 and common infrastructure changes for 5.20

x86:

* Permit guests to ignore single-bit ECC errors

* Fix races in gfn->pfn cache refresh; do not pin pages tracked by the cache

* Intel IPI virtualization

* Allow getting/setting pending triple fault with KVM_GET/SET_VCPU_EVENTS

* PEBS virtualization

* Simplify PMU emulation by just using PERF_TYPE_RAW events

* More accurate event reinjection on SVM (avoid retrying instructions)

* Allow getting/setting the state of the speaker port data bit

* Refuse starting the kvm-intel module if VM-Entry/VM-Exit controls are inconsistent

* "Notify" VM exit (detect microarchitectural hangs) for Intel

* Cleanups for MCE MSR emulation

s390:

* add an interface to provide a hypervisor dump for secure guests

* improve selftests to use TAP interface

* enable interpretive execution of zPCI instructions (for PCI passthrough)

* First part of deferred teardown

* CPU Topology

* PV attestation

* Minor fixes

Generic:

* new selftests API using struct kvm_vcpu instead of a (vm, id) tuple

x86:

* Use try_cmpxchg64 instead of cmpxchg64

* Bugfixes

* Ignore benign host accesses to PMU MSRs when PMU is disabled

* Allow disabling KVM's "MONITOR/MWAIT are NOPs!" behavior

* x86/MMU: Allow NX huge pages to be disabled on a per-vm basis

* Port eager page splitting to shadow MMU as well

* Enable CMCI capability by default and handle injected UCNA errors

* Expose pid of vcpu threads in debugfs

* x2AVIC support for AMD

* cleanup PIO emulation

* Fixes for LLDT/LTR emulation

* Don't require refcounted "struct page" to create huge SPTEs

x86 cleanups:

* Use separate namespaces for guest PTEs and shadow PTEs bitmasks

* PIO emulation

* Reorganize rmap API, mostly around rmap destruction

* Do not workaround very old KVM bugs for L0 that runs with nesting enabled

* new selftests API for CPUID

1 files changed, 14 insertions, 7 deletions

diff --git a/arch/x86/kvm/cpuid.h b/arch/x86/kvm/cpuid.h
index 8a770b481d9d..b1658c0de847 100644
--- a/arch/x86/kvm/cpuid.h
+++ b/arch/x86/kvm/cpuid.h
@@ -13,8 +13,10 @@ void kvm_set_cpu_caps(void);
 
 void kvm_update_cpuid_runtime(struct kvm_vcpu *vcpu);
 void kvm_update_pv_runtime(struct kvm_vcpu *vcpu);
+struct kvm_cpuid_entry2 *kvm_find_cpuid_entry_index(struct kvm_vcpu *vcpu,
+						    u32 function, u32 index);
 struct kvm_cpuid_entry2 *kvm_find_cpuid_entry(struct kvm_vcpu *vcpu,
-					      u32 function, u32 index);
+					      u32 function);
 int kvm_dev_ioctl_get_cpuid(struct kvm_cpuid2 *cpuid,
 			    struct kvm_cpuid_entry2 __user *entries,
 			    unsigned int type);
@@ -76,7 +78,7 @@ static __always_inline u32 *guest_cpuid_get_register(struct kvm_vcpu *vcpu,
 	const struct cpuid_reg cpuid = x86_feature_cpuid(x86_feature);
 	struct kvm_cpuid_entry2 *entry;
 
-	entry = kvm_find_cpuid_entry(vcpu, cpuid.function, cpuid.index);
+	entry = kvm_find_cpuid_entry_index(vcpu, cpuid.function, cpuid.index);
 	if (!entry)
 		return NULL;
 
@@ -109,7 +111,7 @@ static inline bool guest_cpuid_is_amd_or_hygon(struct kvm_vcpu *vcpu)
 {
 	struct kvm_cpuid_entry2 *best;
 
-	best = kvm_find_cpuid_entry(vcpu, 0, 0);
+	best = kvm_find_cpuid_entry(vcpu, 0);
 	return best &&
 	       (is_guest_vendor_amd(best->ebx, best->ecx, best->edx) ||
 		is_guest_vendor_hygon(best->ebx, best->ecx, best->edx));
@@ -119,7 +121,7 @@ static inline bool guest_cpuid_is_intel(struct kvm_vcpu *vcpu)
 {
 	struct kvm_cpuid_entry2 *best;
 
-	best = kvm_find_cpuid_entry(vcpu, 0, 0);
+	best = kvm_find_cpuid_entry(vcpu, 0);
 	return best && is_guest_vendor_intel(best->ebx, best->ecx, best->edx);
 }
 
@@ -127,7 +129,7 @@ static inline int guest_cpuid_family(struct kvm_vcpu *vcpu)
 {
 	struct kvm_cpuid_entry2 *best;
 
-	best = kvm_find_cpuid_entry(vcpu, 0x1, 0);
+	best = kvm_find_cpuid_entry(vcpu, 0x1);
 	if (!best)
 		return -1;
 
@@ -138,18 +140,23 @@ static inline int guest_cpuid_model(struct kvm_vcpu *vcpu)
 {
 	struct kvm_cpuid_entry2 *best;
 
-	best = kvm_find_cpuid_entry(vcpu, 0x1, 0);
+	best = kvm_find_cpuid_entry(vcpu, 0x1);
 	if (!best)
 		return -1;
 
 	return x86_model(best->eax);
 }
 
+static inline bool cpuid_model_is_consistent(struct kvm_vcpu *vcpu)
+{
+	return boot_cpu_data.x86_model == guest_cpuid_model(vcpu);
+}
+
 static inline int guest_cpuid_stepping(struct kvm_vcpu *vcpu)
 {
 	struct kvm_cpuid_entry2 *best;
 
-	best = kvm_find_cpuid_entry(vcpu, 0x1, 0);
+	best = kvm_find_cpuid_entry(vcpu, 0x1);
 	if (!best)
 		return -1;