Adding upstream version 6.1.76.upstream/6.1.76

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 235 insertions, 0 deletions

diff --git a/arch/x86/kvm/cpuid.h b/arch/x86/kvm/cpuid.h
new file mode 100644
index 000000000..b1658c0de
--- /dev/null
+++ b/arch/x86/kvm/cpuid.h
@@ -0,0 +1,235 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+#ifndef ARCH_X86_KVM_CPUID_H
+#define ARCH_X86_KVM_CPUID_H
+
+#include "x86.h"
+#include "reverse_cpuid.h"
+#include <asm/cpu.h>
+#include <asm/processor.h>
+#include <uapi/asm/kvm_para.h>
+
+extern u32 kvm_cpu_caps[NR_KVM_CPU_CAPS] __read_mostly;
+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);
+int kvm_dev_ioctl_get_cpuid(struct kvm_cpuid2 *cpuid,
+			    struct kvm_cpuid_entry2 __user *entries,
+			    unsigned int type);
+int kvm_vcpu_ioctl_set_cpuid(struct kvm_vcpu *vcpu,
+			     struct kvm_cpuid *cpuid,
+			     struct kvm_cpuid_entry __user *entries);
+int kvm_vcpu_ioctl_set_cpuid2(struct kvm_vcpu *vcpu,
+			      struct kvm_cpuid2 *cpuid,
+			      struct kvm_cpuid_entry2 __user *entries);
+int kvm_vcpu_ioctl_get_cpuid2(struct kvm_vcpu *vcpu,
+			      struct kvm_cpuid2 *cpuid,
+			      struct kvm_cpuid_entry2 __user *entries);
+bool kvm_cpuid(struct kvm_vcpu *vcpu, u32 *eax, u32 *ebx,
+	       u32 *ecx, u32 *edx, bool exact_only);
+
+u32 xstate_required_size(u64 xstate_bv, bool compacted);
+
+int cpuid_query_maxphyaddr(struct kvm_vcpu *vcpu);
+u64 kvm_vcpu_reserved_gpa_bits_raw(struct kvm_vcpu *vcpu);
+
+static inline int cpuid_maxphyaddr(struct kvm_vcpu *vcpu)
+{
+	return vcpu->arch.maxphyaddr;
+}
+
+static inline bool kvm_vcpu_is_legal_gpa(struct kvm_vcpu *vcpu, gpa_t gpa)
+{
+	return !(gpa & vcpu->arch.reserved_gpa_bits);
+}
+
+static inline bool kvm_vcpu_is_illegal_gpa(struct kvm_vcpu *vcpu, gpa_t gpa)
+{
+	return !kvm_vcpu_is_legal_gpa(vcpu, gpa);
+}
+
+static inline bool kvm_vcpu_is_legal_aligned_gpa(struct kvm_vcpu *vcpu,
+						 gpa_t gpa, gpa_t alignment)
+{
+	return IS_ALIGNED(gpa, alignment) && kvm_vcpu_is_legal_gpa(vcpu, gpa);
+}
+
+static inline bool page_address_valid(struct kvm_vcpu *vcpu, gpa_t gpa)
+{
+	return kvm_vcpu_is_legal_aligned_gpa(vcpu, gpa, PAGE_SIZE);
+}
+
+static __always_inline void cpuid_entry_override(struct kvm_cpuid_entry2 *entry,
+						 unsigned int leaf)
+{
+	u32 *reg = cpuid_entry_get_reg(entry, leaf * 32);
+
+	BUILD_BUG_ON(leaf >= ARRAY_SIZE(kvm_cpu_caps));
+	*reg = kvm_cpu_caps[leaf];
+}
+
+static __always_inline u32 *guest_cpuid_get_register(struct kvm_vcpu *vcpu,
+						     unsigned int x86_feature)
+{
+	const struct cpuid_reg cpuid = x86_feature_cpuid(x86_feature);
+	struct kvm_cpuid_entry2 *entry;
+
+	entry = kvm_find_cpuid_entry_index(vcpu, cpuid.function, cpuid.index);
+	if (!entry)
+		return NULL;
+
+	return __cpuid_entry_get_reg(entry, cpuid.reg);
+}
+
+static __always_inline bool guest_cpuid_has(struct kvm_vcpu *vcpu,
+					    unsigned int x86_feature)
+{
+	u32 *reg;
+
+	reg = guest_cpuid_get_register(vcpu, x86_feature);
+	if (!reg)
+		return false;
+
+	return *reg & __feature_bit(x86_feature);
+}
+
+static __always_inline void guest_cpuid_clear(struct kvm_vcpu *vcpu,
+					      unsigned int x86_feature)
+{
+	u32 *reg;
+
+	reg = guest_cpuid_get_register(vcpu, x86_feature);
+	if (reg)
+		*reg &= ~__feature_bit(x86_feature);
+}
+
+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);
+	return best &&
+	       (is_guest_vendor_amd(best->ebx, best->ecx, best->edx) ||
+		is_guest_vendor_hygon(best->ebx, best->ecx, best->edx));
+}
+
+static inline bool guest_cpuid_is_intel(struct kvm_vcpu *vcpu)
+{
+	struct kvm_cpuid_entry2 *best;
+
+	best = kvm_find_cpuid_entry(vcpu, 0);
+	return best && is_guest_vendor_intel(best->ebx, best->ecx, best->edx);
+}
+
+static inline int guest_cpuid_family(struct kvm_vcpu *vcpu)
+{
+	struct kvm_cpuid_entry2 *best;
+
+	best = kvm_find_cpuid_entry(vcpu, 0x1);
+	if (!best)
+		return -1;
+
+	return x86_family(best->eax);
+}
+
+static inline int guest_cpuid_model(struct kvm_vcpu *vcpu)
+{
+	struct kvm_cpuid_entry2 *best;
+
+	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);
+	if (!best)
+		return -1;
+
+	return x86_stepping(best->eax);
+}
+
+static inline bool guest_has_spec_ctrl_msr(struct kvm_vcpu *vcpu)
+{
+	return (guest_cpuid_has(vcpu, X86_FEATURE_SPEC_CTRL) ||
+		guest_cpuid_has(vcpu, X86_FEATURE_AMD_STIBP) ||
+		guest_cpuid_has(vcpu, X86_FEATURE_AMD_IBRS) ||
+		guest_cpuid_has(vcpu, X86_FEATURE_AMD_SSBD));
+}
+
+static inline bool guest_has_pred_cmd_msr(struct kvm_vcpu *vcpu)
+{
+	return (guest_cpuid_has(vcpu, X86_FEATURE_SPEC_CTRL) ||
+		guest_cpuid_has(vcpu, X86_FEATURE_AMD_IBPB));
+}
+
+static inline bool supports_cpuid_fault(struct kvm_vcpu *vcpu)
+{
+	return vcpu->arch.msr_platform_info & MSR_PLATFORM_INFO_CPUID_FAULT;
+}
+
+static inline bool cpuid_fault_enabled(struct kvm_vcpu *vcpu)
+{
+	return vcpu->arch.msr_misc_features_enables &
+		  MSR_MISC_FEATURES_ENABLES_CPUID_FAULT;
+}
+
+static __always_inline void kvm_cpu_cap_clear(unsigned int x86_feature)
+{
+	unsigned int x86_leaf = __feature_leaf(x86_feature);
+
+	reverse_cpuid_check(x86_leaf);
+	kvm_cpu_caps[x86_leaf] &= ~__feature_bit(x86_feature);
+}
+
+static __always_inline void kvm_cpu_cap_set(unsigned int x86_feature)
+{
+	unsigned int x86_leaf = __feature_leaf(x86_feature);
+
+	reverse_cpuid_check(x86_leaf);
+	kvm_cpu_caps[x86_leaf] |= __feature_bit(x86_feature);
+}
+
+static __always_inline u32 kvm_cpu_cap_get(unsigned int x86_feature)
+{
+	unsigned int x86_leaf = __feature_leaf(x86_feature);
+
+	reverse_cpuid_check(x86_leaf);
+	return kvm_cpu_caps[x86_leaf] & __feature_bit(x86_feature);
+}
+
+static __always_inline bool kvm_cpu_cap_has(unsigned int x86_feature)
+{
+	return !!kvm_cpu_cap_get(x86_feature);
+}
+
+static __always_inline void kvm_cpu_cap_check_and_set(unsigned int x86_feature)
+{
+	if (boot_cpu_has(x86_feature))
+		kvm_cpu_cap_set(x86_feature);
+}
+
+static __always_inline bool guest_pv_has(struct kvm_vcpu *vcpu,
+					 unsigned int kvm_feature)
+{
+	if (!vcpu->arch.pv_cpuid.enforce)
+		return true;
+
+	return vcpu->arch.pv_cpuid.features & (1u << kvm_feature);
+}
+
+#endif