KVM: x86: Add callback to let modules decide over some supported cpuid bits

This patch adds the get_supported_cpuid callback to
kvm_x86_ops. It will be used in do_cpuid_ent to delegate the
decission about some supported cpuid bits to the
architecture modules.

Cc: stable@kernel.org
Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
Signed-off-by: Avi Kivity <avi@redhat.com>

1 files changed, 6 insertions, 0 deletions

diff --git a/arch/x86/kvm/vmx.c b/arch/x86/kvm/vmx.c
index 54c0035a63f..9f8532b1fa9 100644
--- a/arch/x86/kvm/vmx.c
+++ b/arch/x86/kvm/vmx.c
@@ -4119,6 +4119,10 @@ static void vmx_cpuid_update(struct kvm_vcpu *vcpu)
         }
 }
 
+static void vmx_set_supported_cpuid(u32 func, struct kvm_cpuid_entry2 *entry)
+{
+}
+
 static struct kvm_x86_ops vmx_x86_ops = {
         .cpu_has_kvm_support = cpu_has_kvm_support,
         .disabled_by_bios = vmx_disabled_by_bios,
@@ -4191,6 +4195,8 @@ static struct kvm_x86_ops vmx_x86_ops = {
         .cpuid_update = vmx_cpuid_update,
 
         .rdtscp_supported = vmx_rdtscp_supported,
+
+        .set_supported_cpuid = vmx_set_supported_cpuid,
 };
 
 static int __init vmx_init(void)