L3 event mask indicates the event types supported in host, including
cache occupancy event as well as local/total memory bandwidth events
for Memory Bandwidth Monitoring(MBM). Expose it so all these events
can be monitored in user space.
Signed-off-by: Chao Peng
Reviewed-by: Andrew Cooper
Acked-by: Jan Beulich
---
xen/arch/x86/sysctl.c |3 +++
xen/include/public/sysctl.h |1 +
2 files changed, 4 insertions(+)
diff --git a/xen/arch/x86/sysctl.c b/xen/arch/x86/sysctl.c
index 57ad992..611a291 100644
--- a/xen/arch/x86/sysctl.c
+++ b/xen/arch/x86/sysctl.c
@@ -157,6 +157,9 @@ long arch_do_sysctl(
sysctl->u.psr_cmt_op.u.data = (ret ? 0 : info.size);
break;
}
+case XEN_SYSCTL_PSR_CMT_get_l3_event_mask:
+sysctl->u.psr_cmt_op.u.data = psr_cmt->l3.features;
+break;
default:
sysctl->u.psr_cmt_op.u.data = 0;
ret = -ENOSYS;
diff --git a/xen/include/public/sysctl.h b/xen/include/public/sysctl.h
index b3713b3..8552dc6 100644
--- a/xen/include/public/sysctl.h
+++ b/xen/include/public/sysctl.h
@@ -641,6 +641,7 @@ DEFINE_XEN_GUEST_HANDLE(xen_sysctl_coverage_op_t);
/* The L3 cache size is returned in KB unit */
#define XEN_SYSCTL_PSR_CMT_get_l3_cache_size 2
#define XEN_SYSCTL_PSR_CMT_enabled 3
+#define XEN_SYSCTL_PSR_CMT_get_l3_event_mask 4
struct xen_sysctl_psr_cmt_op {
uint32_t cmd; /* IN: XEN_SYSCTL_PSR_CMT_* */
uint32_t flags; /* padding variable, may be extended for future use */
--
1.7.9.5
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