1 files changed, 97 insertions, 0 deletions
diff --git a/arch/x86/kvm/pmu_amd.c b/arch/x86/kvm/pmu_amd.c
new file mode 100644
index 000000000000..48786407fee1
--- /dev/null
+++ b/arch/x86/kvm/pmu_amd.c
@@ -0,0 +1,97 @@
+/*
+ * KVM PMU support for AMD
+ *
+ * Copyright 2015, Red Hat, Inc. and/or its affiliates.
+ *
+ * Author:
+ *   Wei Huang <wei@redhat.com>
+ *
+ * This work is licensed under the terms of the GNU GPL, version 2.  See
+ * the COPYING file in the top-level directory.
+ *
+ * Implementation is based on pmu_intel.c file
+ */
+#include <linux/types.h>
+#include <linux/kvm_host.h>
+#include <linux/perf_event.h>
+#include "x86.h"
+#include "cpuid.h"
+#include "lapic.h"
+#include "pmu.h"
+
+static unsigned amd_find_arch_event(struct kvm_pmu *pmu,
+				    u8 event_select,
+				    u8 unit_mask)
+{
+	return PERF_COUNT_HW_MAX;
+}
+
+/* return PERF_COUNT_HW_MAX as AMD doesn't have fixed events */
+static unsigned amd_find_fixed_event(int idx)
+{
+	return PERF_COUNT_HW_MAX;
+}
+
+static bool amd_pmc_is_enabled(struct kvm_pmc *pmc)
+{
+	return false;
+}
+
+static struct kvm_pmc *amd_pmc_idx_to_pmc(struct kvm_pmu *pmu, int pmc_idx)
+{
+	return NULL;
+}
+
+/* returns 0 if idx's corresponding MSR exists; otherwise returns 1. */
+static int amd_is_valid_msr_idx(struct kvm_vcpu *vcpu, unsigned idx)
+{
+	return 1;
+}
+
+/* idx is the ECX register of RDPMC instruction */
+static struct kvm_pmc *amd_msr_idx_to_pmc(struct kvm_vcpu *vcpu, unsigned idx)
+{
+	return NULL;
+}
+
+static bool amd_is_valid_msr(struct kvm_vcpu *vcpu, u32 msr)
+{
+	return false;
+}
+
+static int amd_pmu_get_msr(struct kvm_vcpu *vcpu, u32 msr, u64 *data)
+{
+	return 1;
+}
+
+static int amd_pmu_set_msr(struct kvm_vcpu *vcpu, struct msr_data *msr_info)
+{
+	return 1;
+}
+
+static void amd_pmu_refresh(struct kvm_vcpu *vcpu)
+{
+}
+
+static void amd_pmu_init(struct kvm_vcpu *vcpu)
+{
+}
+
+static void amd_pmu_reset(struct kvm_vcpu *vcpu)
+{
+}
+
+struct kvm_pmu_ops amd_pmu_ops = {
+	.find_arch_event = amd_find_arch_event,
+	.find_fixed_event = amd_find_fixed_event,
+	.pmc_is_enabled = amd_pmc_is_enabled,
+	.pmc_idx_to_pmc = amd_pmc_idx_to_pmc,
+	.msr_idx_to_pmc = amd_msr_idx_to_pmc,
+	.is_valid_msr_idx = amd_is_valid_msr_idx,
+	.is_valid_msr = amd_is_valid_msr,
+	.get_msr = amd_pmu_get_msr,
+	.set_msr = amd_pmu_set_msr,
+	.refresh = amd_pmu_refresh,
+	.init = amd_pmu_init,
+	.reset = amd_pmu_reset,
+};