Patch-mainline: v5.17-rc5
Git-commit: b8bfee85f1307426e0242d654f3a14c06ef639c5
References: git-fixes
From: Jim Mattson <jmattson@google.com>
Date: Wed, 2 Feb 2022 17:48:12 -0800
Subject: [PATCH] KVM: x86/pmu: Don't truncate the PerfEvtSeln MSR when
 creating a perf event

AMD's event select is 3 nybbles, with the high nybble in bits 35:32 of
a PerfEvtSeln MSR. Don't drop the high nybble when setting up the
config field of a perf_event_attr structure for a call to
perf_event_create_kernel_counter().

Fixes: ca724305a2b0 ("KVM: x86/vPMU: Implement AMD vPMU code for KVM")
Reported-by: Stephane Eranian <eranian@google.com>
Signed-off-by: Jim Mattson <jmattson@google.com>
Message-Id: <20220203014813.2130559-1-jmattson@google.com>
Reviewed-by: David Dunn <daviddunn@google.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Juergen Gross <jgross@suse.com>
---
 arch/x86/kvm/pmu.c | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/arch/x86/kvm/pmu.c b/arch/x86/kvm/pmu.c
index f614f95acc6b..cd923bad7aed 100644
--- a/arch/x86/kvm/pmu.c
+++ b/arch/x86/kvm/pmu.c
@@ -95,7 +95,7 @@ static void kvm_perf_overflow(struct perf_event *perf_event,
 }
 
 static void pmc_reprogram_counter(struct kvm_pmc *pmc, u32 type,
-				  unsigned config, bool exclude_user,
+				  u64 config, bool exclude_user,
 				  bool exclude_kernel, bool intr,
 				  bool in_tx, bool in_tx_cp)
 {
@@ -181,7 +181,8 @@ static int cmp_u64(const void *a, const void *b)
 
 void reprogram_gp_counter(struct kvm_pmc *pmc, u64 eventsel)
 {
-	unsigned config, type = PERF_TYPE_RAW;
+	u64 config;
+	u32 type = PERF_TYPE_RAW;
 	struct kvm *kvm = pmc->vcpu->kvm;
 	struct kvm_pmu_event_filter *filter;
 	int i;
-- 
2.35.3