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Commit c3619a48 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 Paolo Bonzini:
 "Bug fixes"

* tag 'for-linus' of git://git.kernel.org/pub/scm/virt/kvm/kvm:
  KVM: MMU: record maximum physical address width in kvm_mmu_extended_role
  kvm: x86: Return LA57 feature based on hardware capability
  x86/kvm/mmu: fix switch between root and guest MMUs
  s390: vsie: Use effective CRYCBD.31 to check CRYCBD validity
parents c4eb1e18 de3ccd26

arch/s390/kvm/vsie.c

+1 −1
Original line number Diff line number Diff line
@@ -297,7 +297,7 @@ static int shadow_crycb(struct kvm_vcpu *vcpu, struct vsie_page *vsie_page) 
	scb_s->crycbd = 0;



	apie_h = vcpu->arch.sie_block->eca & ECA_APIE;

	if (!apie_h && !key_msk)

	if (!apie_h && (!key_msk || fmt_o == CRYCB_FORMAT0))

		return 0;



	if (!crycb_addr)

arch/x86/include/asm/kvm_host.h

+2 −0
Original line number Diff line number Diff line
@@ -299,6 +299,7 @@ union kvm_mmu_extended_role { 
		unsigned int cr4_smap:1;

		unsigned int cr4_smep:1;

		unsigned int cr4_la57:1;

		unsigned int maxphyaddr:6;

	};

};
@@ -397,6 +398,7 @@ struct kvm_mmu { 
	void (*update_pte)(struct kvm_vcpu *vcpu, struct kvm_mmu_page *sp,

			   u64 *spte, const void *pte);

	hpa_t root_hpa;

	gpa_t root_cr3;

	union kvm_mmu_role mmu_role;

	u8 root_level;

	u8 shadow_root_level;

arch/x86/kvm/cpuid.c

+4 −0
Original line number Diff line number Diff line
@@ -335,6 +335,7 @@ static inline int __do_cpuid_ent(struct kvm_cpuid_entry2 *entry, u32 function, 
	unsigned f_xsaves = kvm_x86_ops->xsaves_supported() ? F(XSAVES) : 0;

	unsigned f_umip = kvm_x86_ops->umip_emulated() ? F(UMIP) : 0;

	unsigned f_intel_pt = kvm_x86_ops->pt_supported() ? F(INTEL_PT) : 0;

	unsigned f_la57 = 0;



	/* cpuid 1.edx */

	const u32 kvm_cpuid_1_edx_x86_features =
@@ -489,7 +490,10 @@ static inline int __do_cpuid_ent(struct kvm_cpuid_entry2 *entry, u32 function, 
			// TSC_ADJUST is emulated

			entry->ebx |= F(TSC_ADJUST);

			entry->ecx &= kvm_cpuid_7_0_ecx_x86_features;

			f_la57 = entry->ecx & F(LA57);

			cpuid_mask(&entry->ecx, CPUID_7_ECX);

			/* Set LA57 based on hardware capability. */

			entry->ecx |= f_la57;

			entry->ecx |= f_umip;

			/* PKU is not yet implemented for shadow paging. */

			if (!tdp_enabled || !boot_cpu_has(X86_FEATURE_OSPKE))

arch/x86/kvm/mmu.c

+14 −4
Original line number Diff line number Diff line
@@ -3555,6 +3555,7 @@ void kvm_mmu_free_roots(struct kvm_vcpu *vcpu, struct kvm_mmu *mmu, 
							   &invalid_list);

			mmu->root_hpa = INVALID_PAGE;

		}

		mmu->root_cr3 = 0;

	}



	kvm_mmu_commit_zap_page(vcpu->kvm, &invalid_list);
@@ -3610,6 +3611,7 @@ static int mmu_alloc_direct_roots(struct kvm_vcpu *vcpu) 
		vcpu->arch.mmu->root_hpa = __pa(vcpu->arch.mmu->pae_root);

	} else

		BUG();

	vcpu->arch.mmu->root_cr3 = vcpu->arch.mmu->get_cr3(vcpu);



	return 0;

}
@@ -3618,10 +3620,11 @@ static int mmu_alloc_shadow_roots(struct kvm_vcpu *vcpu) 
{

	struct kvm_mmu_page *sp;

	u64 pdptr, pm_mask;

	gfn_t root_gfn;

	gfn_t root_gfn, root_cr3;

	int i;



	root_gfn = vcpu->arch.mmu->get_cr3(vcpu) >> PAGE_SHIFT;

	root_cr3 = vcpu->arch.mmu->get_cr3(vcpu);

	root_gfn = root_cr3 >> PAGE_SHIFT;



	if (mmu_check_root(vcpu, root_gfn))

		return 1;
@@ -3646,7 +3649,7 @@ static int mmu_alloc_shadow_roots(struct kvm_vcpu *vcpu) 
		++sp->root_count;

		spin_unlock(&vcpu->kvm->mmu_lock);

		vcpu->arch.mmu->root_hpa = root;

		return 0;

		goto set_root_cr3;

	}



	/*
@@ -3712,6 +3715,9 @@ static int mmu_alloc_shadow_roots(struct kvm_vcpu *vcpu) 
		vcpu->arch.mmu->root_hpa = __pa(vcpu->arch.mmu->lm_root);

	}



set_root_cr3:

	vcpu->arch.mmu->root_cr3 = root_cr3;



	return 0;

}
@@ -4163,7 +4169,7 @@ static bool cached_root_available(struct kvm_vcpu *vcpu, gpa_t new_cr3, 
	struct kvm_mmu_root_info root;

	struct kvm_mmu *mmu = vcpu->arch.mmu;



	root.cr3 = mmu->get_cr3(vcpu);

	root.cr3 = mmu->root_cr3;

	root.hpa = mmu->root_hpa;



	for (i = 0; i < KVM_MMU_NUM_PREV_ROOTS; i++) {
@@ -4176,6 +4182,7 @@ static bool cached_root_available(struct kvm_vcpu *vcpu, gpa_t new_cr3, 
	}



	mmu->root_hpa = root.hpa;

	mmu->root_cr3 = root.cr3;



	return i < KVM_MMU_NUM_PREV_ROOTS;

}
@@ -4770,6 +4777,7 @@ static union kvm_mmu_extended_role kvm_calc_mmu_role_ext(struct kvm_vcpu *vcpu) 
	ext.cr4_pse = !!is_pse(vcpu);

	ext.cr4_pke = !!kvm_read_cr4_bits(vcpu, X86_CR4_PKE);

	ext.cr4_la57 = !!kvm_read_cr4_bits(vcpu, X86_CR4_LA57);

	ext.maxphyaddr = cpuid_maxphyaddr(vcpu);



	ext.valid = 1;
@@ -5516,11 +5524,13 @@ int kvm_mmu_create(struct kvm_vcpu *vcpu) 
	vcpu->arch.walk_mmu = &vcpu->arch.root_mmu;



	vcpu->arch.root_mmu.root_hpa = INVALID_PAGE;

	vcpu->arch.root_mmu.root_cr3 = 0;

	vcpu->arch.root_mmu.translate_gpa = translate_gpa;

	for (i = 0; i < KVM_MMU_NUM_PREV_ROOTS; i++)

		vcpu->arch.root_mmu.prev_roots[i] = KVM_MMU_ROOT_INFO_INVALID;



	vcpu->arch.guest_mmu.root_hpa = INVALID_PAGE;

	vcpu->arch.guest_mmu.root_cr3 = 0;

	vcpu->arch.guest_mmu.translate_gpa = translate_gpa;

	for (i = 0; i < KVM_MMU_NUM_PREV_ROOTS; i++)

		vcpu->arch.guest_mmu.prev_roots[i] = KVM_MMU_ROOT_INFO_INVALID;