The Memory Tagging Extensions are hardware acceleration present in some ARM processors that allow memory error detection [1]. Introduce a domain XML knob that turns them on or off.
1: https://www.arm.com/blogs/blueprint/memory-safety-arm-memory-tagging-extension Signed-off-by: Michal Privoznik <mpriv...@redhat.com> --- docs/formatdomain.rst | 7 +++++++ src/conf/domain_conf.c | 6 +++++- src/conf/domain_conf.h | 1 + src/conf/schemas/domaincommon.rng | 5 +++++ src/qemu/qemu_validate.c | 1 + tests/qemuxml2argvdata/aarch64-gic-v3.xml | 1 + tests/qemuxml2xmloutdata/aarch64-gic-v3.aarch64-latest.xml | 1 + 7 files changed, 21 insertions(+), 1 deletion(-) diff --git a/docs/formatdomain.rst b/docs/formatdomain.rst index 99383e725c..1f52f58d37 100644 --- a/docs/formatdomain.rst +++ b/docs/formatdomain.rst @@ -2000,6 +2000,7 @@ Hypervisors may allow certain CPU / machine features to be toggled on/off. <tcg> <tb-cache unit='MiB'>128</tb-cache> </tcg> + <mte state='on'/> </features> ... @@ -2230,6 +2231,12 @@ are: tb-cache The size of translation block cache size an integer (a multiple of MiB) :since:`8.0.0` =========== ============================================== =================================================== ============== +``mte`` + Configure Memory Tagging Extensions for ARM guests. Possible values for the + ``state`` attribute are ``on`` and ``off``. If the attribute is not + defined, the hypervisor default will be used. :since:`Since 9.4.0` (QEMU/KVM + only) + Time keeping ------------ diff --git a/src/conf/domain_conf.c b/src/conf/domain_conf.c index 6a864a8db9..047a4c97bf 100644 --- a/src/conf/domain_conf.c +++ b/src/conf/domain_conf.c @@ -181,6 +181,7 @@ VIR_ENUM_IMPL(virDomainFeature, "sbbc", "ibs", "tcg", + "mte", ); VIR_ENUM_IMPL(virDomainCapabilitiesPolicy, @@ -16645,7 +16646,8 @@ virDomainFeaturesDefParse(virDomainDef *def, case VIR_DOMAIN_FEATURE_HTM: case VIR_DOMAIN_FEATURE_NESTED_HV: - case VIR_DOMAIN_FEATURE_CCF_ASSIST: { + case VIR_DOMAIN_FEATURE_CCF_ASSIST: + case VIR_DOMAIN_FEATURE_MTE: { virTristateSwitch state; if (virXMLPropTristateSwitch(nodes[i], "state", @@ -20486,6 +20488,7 @@ virDomainDefFeaturesCheckABIStability(virDomainDef *src, case VIR_DOMAIN_FEATURE_HTM: case VIR_DOMAIN_FEATURE_NESTED_HV: case VIR_DOMAIN_FEATURE_CCF_ASSIST: + case VIR_DOMAIN_FEATURE_MTE: if (src->features[i] != dst->features[i]) { virReportError(VIR_ERR_CONFIG_UNSUPPORTED, _("State of feature '%1$s' differs: source: '%2$s', destination: '%3$s'"), @@ -27005,6 +27008,7 @@ virDomainDefFormatFeatures(virBuffer *buf, case VIR_DOMAIN_FEATURE_HTM: case VIR_DOMAIN_FEATURE_NESTED_HV: case VIR_DOMAIN_FEATURE_CCF_ASSIST: + case VIR_DOMAIN_FEATURE_MTE: switch ((virTristateSwitch) def->features[i]) { case VIR_TRISTATE_SWITCH_LAST: case VIR_TRISTATE_SWITCH_ABSENT: diff --git a/src/conf/domain_conf.h b/src/conf/domain_conf.h index c1cb2ed69d..3f8d6e81c0 100644 --- a/src/conf/domain_conf.h +++ b/src/conf/domain_conf.h @@ -2169,6 +2169,7 @@ typedef enum { VIR_DOMAIN_FEATURE_SBBC, VIR_DOMAIN_FEATURE_IBS, VIR_DOMAIN_FEATURE_TCG, + VIR_DOMAIN_FEATURE_MTE, VIR_DOMAIN_FEATURE_LAST } virDomainFeature; diff --git a/src/conf/schemas/domaincommon.rng b/src/conf/schemas/domaincommon.rng index f8c7b6a648..37e350ac2c 100644 --- a/src/conf/schemas/domaincommon.rng +++ b/src/conf/schemas/domaincommon.rng @@ -6653,6 +6653,11 @@ <optional> <ref name="tcgfeatures"/> </optional> + <optional> + <element name="mte"> + <ref name="featurestate"/> + </element> + </optional> </interleave> </element> </optional> diff --git a/src/qemu/qemu_validate.c b/src/qemu/qemu_validate.c index da4b9a3b35..99c7775e9b 100644 --- a/src/qemu/qemu_validate.c +++ b/src/qemu/qemu_validate.c @@ -123,6 +123,7 @@ qemuValidateDomainDefFeatures(const virDomainDef *def, break; case VIR_DOMAIN_FEATURE_GIC: + case VIR_DOMAIN_FEATURE_MTE: if (def->features[i] == VIR_TRISTATE_SWITCH_ON && !qemuDomainIsARMVirt(def)) { virReportError(VIR_ERR_CONFIG_UNSUPPORTED, diff --git a/tests/qemuxml2argvdata/aarch64-gic-v3.xml b/tests/qemuxml2argvdata/aarch64-gic-v3.xml index 247d6025f7..b9317284b0 100644 --- a/tests/qemuxml2argvdata/aarch64-gic-v3.xml +++ b/tests/qemuxml2argvdata/aarch64-gic-v3.xml @@ -10,6 +10,7 @@ </os> <features> <gic version='3'/> + <mte state='on'/> </features> <cpu mode='host-passthrough' check='none'/> <clock offset='utc'/> diff --git a/tests/qemuxml2xmloutdata/aarch64-gic-v3.aarch64-latest.xml b/tests/qemuxml2xmloutdata/aarch64-gic-v3.aarch64-latest.xml index 5b2fb7df75..1a74903aaa 100644 --- a/tests/qemuxml2xmloutdata/aarch64-gic-v3.aarch64-latest.xml +++ b/tests/qemuxml2xmloutdata/aarch64-gic-v3.aarch64-latest.xml @@ -10,6 +10,7 @@ </os> <features> <gic version='3'/> + <mte state='on'/> </features> <cpu mode='host-passthrough' check='none'/> <clock offset='utc'/> -- 2.39.3
