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[RFC,7/9] KVM:x86: Substitute kvm_update_cpuid_runtime() with kvm_{osxsave,pke}_update_cpuid() in __set_sregs()

Message ID 1596163347-18574-8-git-send-email-robert.hu@linux.intel.com (mailing list archive)
State New, archived
Headers show
Series Split kvm_update_cpuid_runtime() | expand

Commit Message

Robert Hoo July 31, 2020, 2:42 a.m. UTC 
Signed-off-by: Robert Hoo <robert.hu@linux.intel.com>
---
 arch/x86/kvm/x86.c | 15 +++++++++------
 1 file changed, 9 insertions(+), 6 deletions(-)
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Patch

diff --git a/arch/x86/kvm/x86.c b/arch/x86/kvm/x86.c
index 13a2915..35cb3d9 100644
--- a/arch/x86/kvm/x86.c
+++ b/arch/x86/kvm/x86.c
@@ -9183,7 +9183,7 @@  static int __set_sregs(struct kvm_vcpu *vcpu, struct kvm_sregs *sregs)
 {
 	struct msr_data apic_base_msr;
 	int mmu_reset_needed = 0;
-	int cpuid_update_needed = 0;
+	ulong old_cr4 = 0;
 	int pending_vec, max_bits, idx;
 	struct desc_ptr dt;
 	int ret = -EINVAL;
@@ -9217,12 +9217,15 @@  static int __set_sregs(struct kvm_vcpu *vcpu, struct kvm_sregs *sregs)
 	kvm_x86_ops.set_cr0(vcpu, sregs->cr0);
 	vcpu->arch.cr0 = sregs->cr0;
 
-	mmu_reset_needed |= kvm_read_cr4(vcpu) != sregs->cr4;
-	cpuid_update_needed |= ((kvm_read_cr4(vcpu) ^ sregs->cr4) &
-				(X86_CR4_OSXSAVE | X86_CR4_PKE));
+	old_cr4 = kvm_read_cr4(vcpu);
+	mmu_reset_needed |= old_cr4 != sregs->cr4;
+
 	kvm_x86_ops.set_cr4(vcpu, sregs->cr4);
-	if (cpuid_update_needed)
-		kvm_update_cpuid_runtime(vcpu);
+
+	if ((old_cr4 ^ sregs->cr4) & X86_CR4_OSXSAVE)
+		kvm_osxsave_update_cpuid(vcpu, !!(sregs->cr4 & X86_CR4_OSXSAVE));
+	if ((old_cr4 ^ sregs->cr4) & X86_CR4_PKE)
+		kvm_pke_update_cpuid(vcpu, !!(sregs->cr4 & X86_CR4_PKE));
 
 	idx = srcu_read_lock(&vcpu->kvm->srcu);
 	if (is_pae_paging(vcpu)) {