Merge tag 'kvm-x86-svm-6.14' of https://github.com/kvm-x86/linux into HEAD

KVM SVM changes for 6.14:

 - Macrofy the SEV=n version of the sev_xxx_guest() helpers so that the code is
   optimized away when building with less than brilliant compilers.

 - Remove a now-redundant TLB flush when guest CR4.PGE changes.

 - Use str_enabled_disabled() to replace open coded strings.

Author: bonzini

arch/x86/kvm/svm/sev.c

@@ -3051,11 +3051,11 @@ void __init sev_hardware_setup(void)
 			min_sev_asid, max_sev_asid);
 	if (boot_cpu_has(X86_FEATURE_SEV_ES))
 		pr_info("SEV-ES %s (ASIDs %u - %u)\n",
-			sev_es_supported ? "enabled" : "disabled",
+			str_enabled_disabled(sev_es_supported),
 			min_sev_asid > 1 ? 1 : 0, min_sev_asid - 1);
 	if (boot_cpu_has(X86_FEATURE_SEV_SNP))
 		pr_info("SEV-SNP %s (ASIDs %u - %u)\n",
-			sev_snp_supported ? "enabled" : "disabled",
+			str_enabled_disabled(sev_snp_supported),
 			min_sev_asid > 1 ? 1 : 0, min_sev_asid - 1);
 
 	sev_enabled = sev_supported;

arch/x86/kvm/svm/svm.c

@@ -28,6 +28,7 @@
 #include <linux/rwsem.h>
 #include <linux/cc_platform.h>
 #include <linux/smp.h>
+#include <linux/string_choices.h>
 
 #include <asm/apic.h>
 #include <asm/perf_event.h>
@@ -284,8 +285,6 @@ u32 svm_msrpm_offset(u32 msr)
 	return MSR_INVALID;
 }
 
-static void svm_flush_tlb_current(struct kvm_vcpu *vcpu);
-
 static int get_npt_level(void)
 {
 #ifdef CONFIG_X86_64
@@ -1921,9 +1920,6 @@ void svm_set_cr4(struct kvm_vcpu *vcpu, unsigned long cr4)
 	unsigned long host_cr4_mce = cr4_read_shadow() & X86_CR4_MCE;
 	unsigned long old_cr4 = vcpu->arch.cr4;
 
-	if (npt_enabled && ((old_cr4 ^ cr4) & X86_CR4_PGE))
-		svm_flush_tlb_current(vcpu);
-
 	vcpu->arch.cr4 = cr4;
 	if (!npt_enabled) {
 		cr4 |= X86_CR4_PAE;
@@ -5328,7 +5324,7 @@ static __init int svm_hardware_setup(void)
 	/* Force VM NPT level equal to the host's paging level */
 	kvm_configure_mmu(npt_enabled, get_npt_level(),
 			  get_npt_level(), PG_LEVEL_1G);
-	pr_info("Nested Paging %sabled\n", npt_enabled ? "en" : "dis");
+	pr_info("Nested Paging %s\n", str_enabled_disabled(npt_enabled));
 
 	/* Setup shadow_me_value and shadow_me_mask */
 	kvm_mmu_set_me_spte_mask(sme_me_mask, sme_me_mask);

arch/x86/kvm/svm/svm.h

@@ -358,39 +358,32 @@ static __always_inline struct kvm_sev_info *to_kvm_sev_info(struct kvm *kvm)
 	return &to_kvm_svm(kvm)->sev_info;
 }
 
+#ifdef CONFIG_KVM_AMD_SEV
 static __always_inline bool sev_guest(struct kvm *kvm)
 {
-#ifdef CONFIG_KVM_AMD_SEV
 	struct kvm_sev_info *sev = &to_kvm_svm(kvm)->sev_info;
 
 	return sev->active;
-#else
-	return false;
-#endif
 }
-
 static __always_inline bool sev_es_guest(struct kvm *kvm)
 {
-#ifdef CONFIG_KVM_AMD_SEV
 	struct kvm_sev_info *sev = &to_kvm_svm(kvm)->sev_info;
 
 	return sev->es_active && !WARN_ON_ONCE(!sev->active);
-#else
-	return false;
-#endif
 }
 
 static __always_inline bool sev_snp_guest(struct kvm *kvm)
 {
-#ifdef CONFIG_KVM_AMD_SEV
 	struct kvm_sev_info *sev = &to_kvm_svm(kvm)->sev_info;
 
 	return (sev->vmsa_features & SVM_SEV_FEAT_SNP_ACTIVE) &&
 	       !WARN_ON_ONCE(!sev_es_guest(kvm));
+}
 #else
-	return false;
+#define sev_guest(kvm) false
+#define sev_es_guest(kvm) false
+#define sev_snp_guest(kvm) false
 #endif
-}
 
 static inline bool ghcb_gpa_is_registered(struct vcpu_svm *svm, u64 val)
 {