KVM: x86/speculation: Disable Fill buffer clear within guests

[mirror_ubuntu-jammy-kernel.git] / arch / x86 / kvm / vmx / vmx.h

diff --git a/arch/x86/kvm/vmx/vmx.h b/arch/x86/kvm/vmx/vmx.h
index 592217fd7d920229ff7c1bbc185a68d867254211..ee057cf6ce999969c636ff0df25a3c3366cd7445 100644 (file)
--- a/arch/x86/kvm/vmx/vmx.h
+++ b/arch/x86/kvm/vmx/vmx.h
@@ -325,6 +325,8 @@ struct vcpu_vmx {
        u64 msr_ia32_feature_control_valid_bits;
        /* SGX Launch Control public key hash */
        u64 msr_ia32_sgxlepubkeyhash[4];
+       u64 msr_ia32_mcu_opt_ctrl;
+       bool disable_fb_clear;
 
        struct pt_desc pt_desc;
        struct lbr_desc lbr_desc;
@@ -400,6 +402,69 @@ static inline void vmx_set_intercept_for_msr(struct kvm_vcpu *vcpu, u32 msr,
 
 void vmx_update_cpu_dirty_logging(struct kvm_vcpu *vcpu);
 
+static inline bool vmx_test_msr_bitmap_read(ulong *msr_bitmap, u32 msr)
+{
+       int f = sizeof(unsigned long);
+
+       if (msr <= 0x1fff)
+               return test_bit(msr, msr_bitmap + 0x000 / f);
+       else if ((msr >= 0xc0000000) && (msr <= 0xc0001fff))
+               return test_bit(msr & 0x1fff, msr_bitmap + 0x400 / f);
+       return true;
+}
+
+static inline bool vmx_test_msr_bitmap_write(ulong *msr_bitmap, u32 msr)
+{
+       int f = sizeof(unsigned long);
+
+       if (msr <= 0x1fff)
+               return test_bit(msr, msr_bitmap + 0x800 / f);
+       else if ((msr >= 0xc0000000) && (msr <= 0xc0001fff))
+               return test_bit(msr & 0x1fff, msr_bitmap + 0xc00 / f);
+       return true;
+}
+
+static inline void vmx_clear_msr_bitmap_read(ulong *msr_bitmap, u32 msr)
+{
+       int f = sizeof(unsigned long);
+
+       if (msr <= 0x1fff)
+               __clear_bit(msr, msr_bitmap + 0x000 / f);
+       else if ((msr >= 0xc0000000) && (msr <= 0xc0001fff))
+               __clear_bit(msr & 0x1fff, msr_bitmap + 0x400 / f);
+}
+
+static inline void vmx_clear_msr_bitmap_write(ulong *msr_bitmap, u32 msr)
+{
+       int f = sizeof(unsigned long);
+
+       if (msr <= 0x1fff)
+               __clear_bit(msr, msr_bitmap + 0x800 / f);
+       else if ((msr >= 0xc0000000) && (msr <= 0xc0001fff))
+               __clear_bit(msr & 0x1fff, msr_bitmap + 0xc00 / f);
+}
+
+static inline void vmx_set_msr_bitmap_read(ulong *msr_bitmap, u32 msr)
+{
+       int f = sizeof(unsigned long);
+
+       if (msr <= 0x1fff)
+               __set_bit(msr, msr_bitmap + 0x000 / f);
+       else if ((msr >= 0xc0000000) && (msr <= 0xc0001fff))
+               __set_bit(msr & 0x1fff, msr_bitmap + 0x400 / f);
+}
+
+static inline void vmx_set_msr_bitmap_write(ulong *msr_bitmap, u32 msr)
+{
+       int f = sizeof(unsigned long);
+
+       if (msr <= 0x1fff)
+               __set_bit(msr, msr_bitmap + 0x800 / f);
+       else if ((msr >= 0xc0000000) && (msr <= 0xc0001fff))
+               __set_bit(msr & 0x1fff, msr_bitmap + 0xc00 / f);
+}
+
+
 static inline u8 vmx_get_rvi(void)
 {
        return vmcs_read16(GUEST_INTR_STATUS) & 0xff;