[PATCH v4 07/21] KVM: x86/pmu: Expose kvm_host_pmu to vendor modules

[Zide Chen <zide.chen@intel.com>]

kvm_host_pmu holds the unadulterated host PMU capabilities, which
can be used to compare against guest capabilities to determine whether
certain MSRs should be intercepted by KVM.

Exposing it directly avoids the need to introduce per-field accessors,
which would add boilerplate without hiding any implementation detail
worth encapsulating.

Opportunistically, fix typo "Unadultered" in the comment.

Signed-off-by: Zide Chen <zide.chen@intel.com>
Reviewed-by: Dapeng Mi <dapeng1.mi@linux.intel.com>
Reviewed-by: Jim Mattson <jmattson@google.com>
Reviewed-by: Yosry Ahmed <yosry@kernel.org>
---
 arch/x86/kvm/pmu.c | 5 +++--
 arch/x86/kvm/pmu.h | 1 +
 2 files changed, 4 insertions(+), 2 deletions(-)

diff --git a/arch/x86/kvm/pmu.c b/arch/x86/kvm/pmu.c
index 484dfd2eba10..d203cbc7fd12 100644
--- a/arch/x86/kvm/pmu.c
+++ b/arch/x86/kvm/pmu.c
@@ -27,8 +27,9 @@
 /* This is enough to filter the vast majority of currently defined events. */
 #define KVM_PMU_EVENT_FILTER_MAX_EVENTS 300
 
-/* Unadultered PMU capabilities of the host, i.e. of hardware. */
-static struct x86_pmu_capability __read_mostly kvm_host_pmu;
+/* Unadulterated PMU capabilities of the host, i.e. of hardware. */
+struct x86_pmu_capability __read_mostly kvm_host_pmu;
+EXPORT_SYMBOL_FOR_KVM_INTERNAL(kvm_host_pmu);
 
 /* KVM's PMU capabilities, i.e. the intersection of KVM and hardware support. */
 struct x86_pmu_capability __read_mostly kvm_pmu_cap;
diff --git a/arch/x86/kvm/pmu.h b/arch/x86/kvm/pmu.h
index b312f80f5cda..02a19aa7e7de 100644
--- a/arch/x86/kvm/pmu.h
+++ b/arch/x86/kvm/pmu.h
@@ -252,6 +252,7 @@ static inline bool pmc_is_locally_enabled(struct kvm_pmc *pmc)
 	return !kvm_pmu_call(pmc_is_disabled_in_current_mode)(pmc);
 }
 
+extern struct x86_pmu_capability kvm_host_pmu;
 extern struct x86_pmu_capability kvm_pmu_cap;
 
 void kvm_init_pmu_capability(struct kvm_pmu_ops *pmu_ops);
-- 
2.56.1