KVM: MMU: change kvm_mmu_hugepage_adjust() arguments to kvm_page_fault

Pass struct kvm_page_fault to kvm_mmu_hugepage_adjust() instead of
extracting the arguments from the struct; the results are also stored
in the struct, so the callers are adjusted consequently.

Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>

1 files changed, 33 insertions, 2 deletions

diff --git a/arch/x86/kvm/mmu.h b/arch/x86/kvm/mmu.h
index 6697571197a5..01a4d1bc5053 100644
--- a/arch/x86/kvm/mmu.h
+++ b/arch/x86/kvm/mmu.h
@@ -127,12 +127,34 @@ struct kvm_page_fault {
 	const bool rsvd;
 	const bool user;
 
-	/* Derived from mmu.  */
+	/* Derived from mmu and global state.  */
 	const bool is_tdp;
+	const bool nx_huge_page_workaround_enabled;
 
-	/* Input to FNAME(fetch), __direct_map and kvm_tdp_mmu_map.  */
+	/*
+	 * Whether a >4KB mapping can be created or is forbidden due to NX
+	 * hugepages.
+	 */
+	bool huge_page_disallowed;
+
+	/*
+	 * Maximum page size that can be created for this fault; input to
+	 * FNAME(fetch), __direct_map and kvm_tdp_mmu_map.
+	 */
 	u8 max_level;
 
+	/*
+	 * Page size that can be created based on the max_level and the
+	 * page size used by the host mapping.
+	 */
+	u8 req_level;
+
+	/*
+	 * Page size that will be created based on the req_level and
+	 * huge_page_disallowed.
+	 */
+	u8 goal_level;
+
 	/* Shifted addr, or result of guest page table walk if addr is a gva.  */
 	gfn_t gfn;
 
@@ -144,6 +166,12 @@ struct kvm_page_fault {
 
 int kvm_tdp_page_fault(struct kvm_vcpu *vcpu, struct kvm_page_fault *fault);
 
+extern int nx_huge_pages;
+static inline bool is_nx_huge_page_enabled(void)
+{
+	return READ_ONCE(nx_huge_pages);
+}
+
 static inline int kvm_mmu_do_page_fault(struct kvm_vcpu *vcpu, gpa_t cr2_or_gpa,
 					u32 err, bool prefault)
 {
@@ -157,8 +185,11 @@ static inline int kvm_mmu_do_page_fault(struct kvm_vcpu *vcpu, gpa_t cr2_or_gpa,
 		.user = err & PFERR_USER_MASK,
 		.prefault = prefault,
 		.is_tdp = likely(vcpu->arch.mmu->page_fault == kvm_tdp_page_fault),
+		.nx_huge_page_workaround_enabled = is_nx_huge_page_enabled(),
 
 		.max_level = KVM_MAX_HUGEPAGE_LEVEL,
+		.req_level = PG_LEVEL_4K,
+		.goal_level = PG_LEVEL_4K,
 	};
 #ifdef CONFIG_RETPOLINE
 	if (fault.is_tdp)