[Xen-devel] [PATCH v5 18/28] xen/x86: allow disabling the emulated pmu

[Roger Pau Monne <roger.pau@xxxxxxxxxx>]

Signed-off-by: Roger Pau Monnà <roger.pau@xxxxxxxxxx>
Acked-by: Andrew Cooper <andrew.cooper3@xxxxxxxxxx>
Cc: Jan Beulich <jbeulich@xxxxxxxx>
Cc: Andrew Cooper <andrew.cooper3@xxxxxxxxxx>
---
Changes since v4:
 - Add Andrew Cooper Acked-by.
---
 xen/arch/x86/cpu/vpmu.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/xen/arch/x86/cpu/vpmu.c b/xen/arch/x86/cpu/vpmu.c
index 8af3df1..d5bb77d 100644
--- a/xen/arch/x86/cpu/vpmu.c
+++ b/xen/arch/x86/cpu/vpmu.c
@@ -439,6 +439,9 @@ void vpmu_initialise(struct vcpu *v)
     int ret;
     bool_t is_priv_vpmu = is_hardware_domain(v->domain);
 
+    if ( !has_vpmu(v->domain) )
+        return;
+
     BUILD_BUG_ON(sizeof(struct xen_pmu_intel_ctxt) > XENPMU_CTXT_PAD_SZ);
     BUILD_BUG_ON(sizeof(struct xen_pmu_amd_ctxt) > XENPMU_CTXT_PAD_SZ);
     BUILD_BUG_ON(sizeof(struct xen_pmu_regs) > XENPMU_REGS_PAD_SZ);
-- 
1.9.5 (Apple Git-50.3)


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