KVM: x86: Fix sizes used to pass around CR0, CR4, and EFER

When configuring KVM's MMU, pass CR0 and CR4 as unsigned longs, and EFER
as a u64 in various flows (mostly MMU).  Passing the params as u32s is
functionally ok since all of the affected registers reserve bits 63:32 to
zero (enforced by KVM), but it's technically wrong.

No functional change intended.

Signed-off-by: Sean Christopherson <seanjc@google.com>
Message-Id: <20210622175739.3610207-15-seanjc@google.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>

diff --git a/arch/x86/kvm/mmu.h b/arch/x86/kvm/mmu.h
index bc11402..47131b9 100644 (file)
--- a/arch/x86/kvm/mmu.h
+++ b/arch/x86/kvm/mmu.h
@@ -66,8 +66,8 @@ void
 reset_shadow_zero_bits_mask(struct kvm_vcpu *vcpu, struct kvm_mmu *context);
 
 void kvm_init_mmu(struct kvm_vcpu *vcpu);
-void kvm_init_shadow_npt_mmu(struct kvm_vcpu *vcpu, u32 cr0, u32 cr4, u32 efer,
-                            gpa_t nested_cr3);
+void kvm_init_shadow_npt_mmu(struct kvm_vcpu *vcpu, unsigned long cr0,
+                            unsigned long cr4, u64 efer, gpa_t nested_cr3);
 void kvm_init_shadow_ept_mmu(struct kvm_vcpu *vcpu, bool execonly,
                             bool accessed_dirty, gpa_t new_eptp);
 bool kvm_can_do_async_pf(struct kvm_vcpu *vcpu);

diff --git a/arch/x86/kvm/mmu/mmu.c b/arch/x86/kvm/mmu/mmu.c
index dffa948..f3c4c63 100644 (file)
--- a/arch/x86/kvm/mmu/mmu.c
+++ b/arch/x86/kvm/mmu/mmu.c
@@ -4659,8 +4659,8 @@ kvm_calc_shadow_mmu_root_page_role(struct kvm_vcpu *vcpu, bool base_only)
 }
 
 static void shadow_mmu_init_context(struct kvm_vcpu *vcpu, struct kvm_mmu *context,
-                                   u32 cr0, u32 cr4, u32 efer,
-                                   union kvm_mmu_role new_role)
+                                   unsigned long cr0, unsigned long cr4,
+                                   u64 efer, union kvm_mmu_role new_role)
 {
        if (!(cr0 & X86_CR0_PG))
                nonpaging_init_context(vcpu, context);
@@ -4675,7 +4675,8 @@ static void shadow_mmu_init_context(struct kvm_vcpu *vcpu, struct kvm_mmu *conte
        reset_shadow_zero_bits_mask(vcpu, context);
 }
 
-static void kvm_init_shadow_mmu(struct kvm_vcpu *vcpu, u32 cr0, u32 cr4, u32 efer)
+static void kvm_init_shadow_mmu(struct kvm_vcpu *vcpu, unsigned long cr0,
+                               unsigned long cr4, u64 efer)
 {
        struct kvm_mmu *context = &vcpu->arch.root_mmu;
        union kvm_mmu_role new_role =
@@ -4697,8 +4698,8 @@ kvm_calc_shadow_npt_root_page_role(struct kvm_vcpu *vcpu)
        return role;
 }
 
-void kvm_init_shadow_npt_mmu(struct kvm_vcpu *vcpu, u32 cr0, u32 cr4, u32 efer,
-                            gpa_t nested_cr3)
+void kvm_init_shadow_npt_mmu(struct kvm_vcpu *vcpu, unsigned long cr0,
+                            unsigned long cr4, u64 efer, gpa_t nested_cr3)
 {
        struct kvm_mmu *context = &vcpu->arch.guest_mmu;
        union kvm_mmu_role new_role = kvm_calc_shadow_npt_root_page_role(vcpu);

diff --git a/arch/x86/kvm/svm/nested.c b/arch/x86/kvm/svm/nested.c
index dca20f9..9f0e7ed 100644 (file)
--- a/arch/x86/kvm/svm/nested.c
+++ b/arch/x86/kvm/svm/nested.c
@@ -1244,8 +1244,8 @@ static int svm_set_nested_state(struct kvm_vcpu *vcpu,
                &user_kvm_nested_state->data.svm[0];
        struct vmcb_control_area *ctl;
        struct vmcb_save_area *save;
+       unsigned long cr0;
        int ret;
-       u32 cr0;
 
        BUILD_BUG_ON(sizeof(struct vmcb_control_area) + sizeof(struct vmcb_save_area) >
                     KVM_STATE_NESTED_SVM_VMCB_SIZE);

diff --git a/arch/x86/kvm/x86.c b/arch/x86/kvm/x86.c
index c862783..0b05969 100644 (file)
--- a/arch/x86/kvm/x86.c
+++ b/arch/x86/kvm/x86.c
@@ -9095,8 +9095,8 @@ static void enter_smm(struct kvm_vcpu *vcpu)
 {
        struct kvm_segment cs, ds;
        struct desc_ptr dt;
+       unsigned long cr0;
        char buf[512];
-       u32 cr0;
 
        memset(buf, 0, 512);
 #ifdef CONFIG_X86_64