diff --git a/docs/formatdomain.html.in b/docs/formatdomain.html.in
index 680b98593feefc69a23f37f0247d74daeb27bb45..68d664151dc3b5fdbb8b7ef02d47d5c2c2a46fd3 100644
--- a/docs/formatdomain.html.in
+++ b/docs/formatdomain.html.in
@@ -1955,6 +1955,7 @@
<event name='page_faults_min' enabled='no'/>
<event name='page_faults_maj' enabled='no'/>
<event name='alignment_faults' enabled='no'/>
+ <event name='emulation_faults' enabled='no'/>
</perf>
...
@@ -2090,6 +2091,14 @@
applications running on the platform
perf.alignment_faults |
+
+ emulation_faults |
+ the count of emulation faults, that is when
+ the kernel traps on unimplemented instrucions
+ and emulates them for user space, by
+ applications running on the platform |
+ perf.emulation_faults |
+
diff --git a/docs/schemas/domaincommon.rng b/docs/schemas/domaincommon.rng
index 1f0c72914879465c6eb2a765eb11c21991bed6a9..1860f9075b725f3e53e7ce6d88f082640843d058 100644
--- a/docs/schemas/domaincommon.rng
+++ b/docs/schemas/domaincommon.rng
@@ -441,6 +441,7 @@
page_faults_min
page_faults_maj
alignment_faults
+ emulation_faults
diff --git a/include/libvirt/libvirt-domain.h b/include/libvirt/libvirt-domain.h
index 0c0fb182da7c598cddf9574196116b3f8a878ef6..c490d712f22ebeb41b9fba4e090ed8e213502334 100644
--- a/include/libvirt/libvirt-domain.h
+++ b/include/libvirt/libvirt-domain.h
@@ -2270,6 +2270,16 @@ void virDomainStatsRecordListFree(virDomainStatsRecordPtr *stats);
*/
# define VIR_PERF_PARAM_ALIGNMENT_FAULTS "alignment_faults"
+/**
+ * VIR_PERF_PARAM_EMULATION_FAULTS:
+ *
+ * Macro for typed parameter name that represents emulation_faults
+ * perf event which can be used to measure the count of emulation
+ * faults by applications running on the platform. It corresponds
+ * to the "perf.emulation_faults" field in the *Stats APIs.
+ */
+# define VIR_PERF_PARAM_EMULATION_FAULTS "emulation_faults"
+
int virDomainGetPerfEvents(virDomainPtr dom,
virTypedParameterPtr *params,
int *nparams,
diff --git a/src/libvirt-domain.c b/src/libvirt-domain.c
index 012795202f5cb9a0df3d5c16424a87659c38167f..d8c88e06c476268098b46232473470dcc8aee7ae 100644
--- a/src/libvirt-domain.c
+++ b/src/libvirt-domain.c
@@ -11272,6 +11272,9 @@ virConnectGetDomainCapabilities(virConnectPtr conn,
* "perf.alignment_faults" - The count of alignment faults as unsigned
* long long. It is produced by the
* alignment_faults perf event
+ * "perf.emulation_faults" - The count of emulation faults as unsigned
+ * long long. It is produced by the
+ * emulation_faults perf event
*
* Note that entire stats groups or individual stat fields may be missing from
* the output in case they are not supported by the given hypervisor, are not
diff --git a/src/qemu/qemu_driver.c b/src/qemu/qemu_driver.c
index a6d8f141b5e35532ee87765dd9ccd7a13142a43c..639db74085024f2a7f36d8c8994340ccd0ee8067 100644
--- a/src/qemu/qemu_driver.c
+++ b/src/qemu/qemu_driver.c
@@ -9575,6 +9575,7 @@ qemuDomainSetPerfEvents(virDomainPtr dom,
VIR_PERF_PARAM_PAGE_FAULTS_MIN, VIR_TYPED_PARAM_BOOLEAN,
VIR_PERF_PARAM_PAGE_FAULTS_MAJ, VIR_TYPED_PARAM_BOOLEAN,
VIR_PERF_PARAM_ALIGNMENT_FAULTS, VIR_TYPED_PARAM_BOOLEAN,
+ VIR_PERF_PARAM_EMULATION_FAULTS, VIR_TYPED_PARAM_BOOLEAN,
NULL) < 0)
return -1;
diff --git a/src/util/virperf.c b/src/util/virperf.c
index 3f015965c2a2ad793e075f5b0d55c444a849cd72..e39cebbe0f175b3feb8f7b5ee23aa3f91e2dec95 100644
--- a/src/util/virperf.c
+++ b/src/util/virperf.c
@@ -47,7 +47,7 @@ VIR_ENUM_IMPL(virPerfEvent, VIR_PERF_EVENT_LAST,
"cpu_clock", "task_clock", "page_faults",
"context_switches", "cpu_migrations",
"page_faults_min", "page_faults_maj",
- "alignment_faults");
+ "alignment_faults", "emulation_faults");
struct virPerfEvent {
int type;
@@ -140,6 +140,9 @@ static struct virPerfEventAttr attrs[] = {
{.type = VIR_PERF_EVENT_ALIGNMENT_FAULTS,
.attrType = PERF_TYPE_SOFTWARE,
.attrConfig = PERF_COUNT_SW_ALIGNMENT_FAULTS},
+ {.type = VIR_PERF_EVENT_EMULATION_FAULTS,
+ .attrType = PERF_TYPE_SOFTWARE,
+ .attrConfig = PERF_COUNT_SW_EMULATION_FAULTS},
};
typedef struct virPerfEventAttr *virPerfEventAttrPtr;
diff --git a/src/util/virperf.h b/src/util/virperf.h
index 4e464600ce3a5786af605220c498d5e1aeb0bd67..eee7a03d27771473fa81065d7e1f71177aa316b9 100644
--- a/src/util/virperf.h
+++ b/src/util/virperf.h
@@ -55,6 +55,7 @@ typedef enum {
VIR_PERF_EVENT_PAGE_FAULTS_MIN, /* Count of minor page faults */
VIR_PERF_EVENT_PAGE_FAULTS_MAJ, /* Count of major page faults */
VIR_PERF_EVENT_ALIGNMENT_FAULTS, /* Count of alignment faults */
+ VIR_PERF_EVENT_EMULATION_FAULTS, /* Count of emulation faults */
VIR_PERF_EVENT_LAST
} virPerfEventType;
diff --git a/tests/genericxml2xmlindata/generic-perf.xml b/tests/genericxml2xmlindata/generic-perf.xml
index b48f96c38f44b832445d981d4e59e7a02a108153..457aea0ef67ceaa0bb309adc212289e8d3e4e51e 100644
--- a/tests/genericxml2xmlindata/generic-perf.xml
+++ b/tests/genericxml2xmlindata/generic-perf.xml
@@ -34,6 +34,7 @@
+
diff --git a/tools/virsh.pod b/tools/virsh.pod
index 0fe4188c998f8154e9a8759a8608085933cdecdb..ee790461136206c729f22daa26bf64afe94c39a8 100644
--- a/tools/virsh.pod
+++ b/tools/virsh.pod
@@ -972,6 +972,7 @@ I<--perf> returns the statistics of all enabled perf events:
"perf.page_faults_min" - the count of minor page faults
"perf.page_faults_maj" - the count of major page faults
"perf.alignment_faults" - the count of alignment faults
+ "perf.emulation_faults" - the count of emulation faults
See the B command for more details about each event.
@@ -2357,6 +2358,8 @@ B
by applications running on the platform.
alignment_faults - Provides the count alignment faults
by applications running on the platform.
+ emulation_faults - Provides the count emulation faults
+ by applications running on the platform.
B: The statistics can be retrieved using the B command using
the I<--perf> flag.