linux-kernel - [PATCH 5/8] KVM: x86: SVM: move tsc ratio definitions to svm.h

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Date:   Tue, 22 Mar 2022 19:24:46 +0200
From:   Maxim Levitsky <mlevitsk@...hat.com>
To:     kvm@...r.kernel.org
Cc:     Jim Mattson <jmattson@...gle.com>,
        Paolo Bonzini <pbonzini@...hat.com>,
        Wanpeng Li <wanpengli@...cent.com>,
        Borislav Petkov <bp@...en8.de>, Joerg Roedel <joro@...tes.org>,
        Ingo Molnar <mingo@...hat.com>,
        Suravee Suthikulpanit <suravee.suthikulpanit@....com>,
        x86@...nel.org, "H. Peter Anvin" <hpa@...or.com>,
        Dave Hansen <dave.hansen@...ux.intel.com>,
        linux-kernel@...r.kernel.org,
        Sean Christopherson <seanjc@...gle.com>,
        Vitaly Kuznetsov <vkuznets@...hat.com>,
        Thomas Gleixner <tglx@...utronix.de>,
        Maxim Levitsky <mlevitsk@...hat.com>
Subject: [PATCH 5/8] KVM: x86: SVM: move tsc ratio definitions to svm.h

Another piece of SVM spec which should be in the header file

Signed-off-by: Maxim Levitsky <mlevitsk@...hat.com>
---
 arch/x86/include/asm/svm.h |  6 ++++++
 arch/x86/kvm/svm/svm.c     | 15 +++++----------
 2 files changed, 11 insertions(+), 10 deletions(-)

diff --git a/arch/x86/include/asm/svm.h b/arch/x86/include/asm/svm.h
index ab572d8def2b..f70a5108d464 100644
--- a/arch/x86/include/asm/svm.h
+++ b/arch/x86/include/asm/svm.h
@@ -221,6 +221,12 @@ struct __attribute__ ((__packed__)) vmcb_control_area {
 #define SVM_NESTED_CTL_SEV_ES_ENABLE	BIT(2)
 
 
+#define SVM_TSC_RATIO_RSVD	0xffffff0000000000ULL
+#define SVM_TSC_RATIO_MIN	0x0000000000000001ULL
+#define SVM_TSC_RATIO_MAX	0x000000ffffffffffULL
+#define SVM_TSC_RATIO_DEFAULT	0x0100000000ULL
+
+
 /* AVIC */
 #define AVIC_LOGICAL_ID_ENTRY_GUEST_PHYSICAL_ID_MASK	(0xFFULL)
 #define AVIC_LOGICAL_ID_ENTRY_VALID_BIT			31
diff --git a/arch/x86/kvm/svm/svm.c b/arch/x86/kvm/svm/svm.c
index e9a5c1e80889..ea3f0b2605e5 100644
--- a/arch/x86/kvm/svm/svm.c
+++ b/arch/x86/kvm/svm/svm.c
@@ -72,10 +72,6 @@ MODULE_DEVICE_TABLE(x86cpu, svm_cpu_id);
 
 #define DEBUGCTL_RESERVED_BITS (~(0x3fULL))
 
-#define TSC_RATIO_RSVD          0xffffff0000000000ULL
-#define TSC_RATIO_MIN		0x0000000000000001ULL
-#define TSC_RATIO_MAX		0x000000ffffffffffULL
-
 static bool erratum_383_found __read_mostly;
 
 u32 msrpm_offsets[MSRPM_OFFSETS] __read_mostly;
@@ -87,7 +83,6 @@ u32 msrpm_offsets[MSRPM_OFFSETS] __read_mostly;
 static uint64_t osvw_len = 4, osvw_status;
 
 static DEFINE_PER_CPU(u64, current_tsc_ratio);
-#define TSC_RATIO_DEFAULT	0x0100000000ULL
 
 static const struct svm_direct_access_msrs {
 	u32 index;   /* Index of the MSR */
@@ -483,7 +478,7 @@ static void svm_hardware_disable(void)
 {
 	/* Make sure we clean up behind us */
 	if (tsc_scaling)
-		wrmsrl(MSR_AMD64_TSC_RATIO, TSC_RATIO_DEFAULT);
+		wrmsrl(MSR_AMD64_TSC_RATIO, SVM_TSC_RATIO_DEFAULT);
 
 	cpu_svm_disable();
 
@@ -529,8 +524,8 @@ static int svm_hardware_enable(void)
 		 * Set the default value, even if we don't use TSC scaling
 		 * to avoid having stale value in the msr
 		 */
-		wrmsrl(MSR_AMD64_TSC_RATIO, TSC_RATIO_DEFAULT);
-		__this_cpu_write(current_tsc_ratio, TSC_RATIO_DEFAULT);
+		wrmsrl(MSR_AMD64_TSC_RATIO, SVM_TSC_RATIO_DEFAULT);
+		__this_cpu_write(current_tsc_ratio, SVM_TSC_RATIO_DEFAULT);
 	}
 
 
@@ -2729,7 +2724,7 @@ static int svm_set_msr(struct kvm_vcpu *vcpu, struct msr_data *msr)
 			break;
 		}
 
-		if (data & TSC_RATIO_RSVD)
+		if (data & SVM_TSC_RATIO_RSVD)
 			return 1;
 
 		svm->tsc_ratio_msr = data;
@@ -4776,7 +4771,7 @@ static __init int svm_hardware_setup(void)
 		} else {
 			pr_info("TSC scaling supported\n");
 			kvm_has_tsc_control = true;
-			kvm_max_tsc_scaling_ratio = TSC_RATIO_MAX;
+			kvm_max_tsc_scaling_ratio = SVM_TSC_RATIO_MAX;
 			kvm_tsc_scaling_ratio_frac_bits = 32;
 		}
 	}
-- 
2.26.3