Add sve parameter in XL configuration to allow guests to use
SVE feature.
Signed-off-by: Luca Fancellu
---
Changes from v6:
- Add check for sve_vl be multiple of 128 (Anthony)
Changes from v5:
- Update documentation
- re-generated golang files
Changes from v4:
- Rename sve field to sve_vl (Anthony), changed type to
libxl_sve_type
- Sanity check of sve field in libxl instead of xl, update docs
(Anthony)
- drop Ack-by from George because of the changes in the Golang bits
Changes from v3:
- no changes
Changes from v2:
- domain configuration field name has changed to sve_vl,
also its value now is VL/128.
- Add Ack-by George for the Golang bits
Changes from v1:
- updated to use arch_capabilities field for vector length
Changes from RFC:
- changed libxl_types.idl sve field to uint16
- now toolstack uses info from physinfo to check against the
sve XL value
- Changed documentation
---
docs/man/xl.cfg.5.pod.in | 16 ++
tools/golang/xenlight/helpers.gen.go | 2 ++
tools/golang/xenlight/types.gen.go | 23 +++
tools/include/libxl.h| 5 +
tools/libs/light/libxl_arm.c | 33
tools/libs/light/libxl_types.idl | 22 +++
tools/xl/xl_parse.c | 8 +++
7 files changed, 109 insertions(+)
diff --git a/docs/man/xl.cfg.5.pod.in b/docs/man/xl.cfg.5.pod.in
index 24ac92718288..1b4e13ab647b 100644
--- a/docs/man/xl.cfg.5.pod.in
+++ b/docs/man/xl.cfg.5.pod.in
@@ -2955,6 +2955,22 @@ Currently, only the "sbsa_uart" model is supported for
ARM.
=back
+=item B
+
+The `sve` parameter enables Arm Scalable Vector Extension (SVE) usage for the
+guest and sets the maximum SVE vector length, the option is applicable only to
+AArch64 guests.
+A value equal to "disabled" disables the feature, this is the default value.
+Allowed values are "disabled", "128", "256", "384", "512", "640", "768", "896",
+"1024", "1152", "1280", "1408", "1536", "1664", "1792", "1920", "2048", "hw".
+Specifying "hw" means that the maximum vector length supported by the platform
+will be used.
+Please be aware that if a specific vector length is passed and its value is
+above the maximum vector length supported by the platform, an error will be
+raised.
+
+=back
+
=head3 x86
=over 4
diff --git a/tools/golang/xenlight/helpers.gen.go
b/tools/golang/xenlight/helpers.gen.go
index 35397be2f9e2..cd1a16e32eac 100644
--- a/tools/golang/xenlight/helpers.gen.go
+++ b/tools/golang/xenlight/helpers.gen.go
@@ -1149,6 +1149,7 @@ default:
return fmt.Errorf("invalid union key '%v'", x.Type)}
x.ArchArm.GicVersion = GicVersion(xc.arch_arm.gic_version)
x.ArchArm.Vuart = VuartType(xc.arch_arm.vuart)
+x.ArchArm.SveVl = SveType(xc.arch_arm.sve_vl)
if err := x.ArchX86.MsrRelaxed.fromC(_x86.msr_relaxed);err != nil {
return fmt.Errorf("converting field ArchX86.MsrRelaxed: %v", err)
}
@@ -1653,6 +1654,7 @@ default:
return fmt.Errorf("invalid union key '%v'", x.Type)}
xc.arch_arm.gic_version = C.libxl_gic_version(x.ArchArm.GicVersion)
xc.arch_arm.vuart = C.libxl_vuart_type(x.ArchArm.Vuart)
+xc.arch_arm.sve_vl = C.libxl_sve_type(x.ArchArm.SveVl)
if err := x.ArchX86.MsrRelaxed.toC(_x86.msr_relaxed); err != nil {
return fmt.Errorf("converting field ArchX86.MsrRelaxed: %v", err)
}
diff --git a/tools/golang/xenlight/types.gen.go
b/tools/golang/xenlight/types.gen.go
index 3d968a496744..b131a7eedc9d 100644
--- a/tools/golang/xenlight/types.gen.go
+++ b/tools/golang/xenlight/types.gen.go
@@ -490,6 +490,28 @@ TeeTypeNone TeeType = 0
TeeTypeOptee TeeType = 1
)
+type SveType int
+const(
+SveTypeHw SveType = -1
+SveTypeDisabled SveType = 0
+SveType128 SveType = 128
+SveType256 SveType = 256
+SveType384 SveType = 384
+SveType512 SveType = 512
+SveType640 SveType = 640
+SveType768 SveType = 768
+SveType896 SveType = 896
+SveType1024 SveType = 1024
+SveType1152 SveType = 1152
+SveType1280 SveType = 1280
+SveType1408 SveType = 1408
+SveType1536 SveType = 1536
+SveType1664 SveType = 1664
+SveType1792 SveType = 1792
+SveType1920 SveType = 1920
+SveType2048 SveType = 2048
+)
+
type RdmReserve struct {
Strategy RdmReserveStrategy
Policy RdmReservePolicy
@@ -564,6 +586,7 @@ TypeUnion DomainBuildInfoTypeUnion
ArchArm struct {
GicVersion GicVersion
Vuart VuartType
+SveVl SveType
}
ArchX86 struct {
MsrRelaxed Defbool
diff --git a/tools/include/libxl.h b/tools/include/libxl.h
index 4fa09ff7635a..cac641a7eba2 100644
--- a/tools/include/libxl.h
+++ b/tools/include/libxl.h
@@ -283,6 +283,11 @@
*/
#define LIBXL_HAVE_BUILDINFO_ARCH_ARM_TEE 1
+/*
+ * libxl_domain_build_info has the arch_arm.sve_vl field.
+ */
+#define LIBXL_HAVE_BUILDINFO_ARCH_ARM_SVE_VL 1
+
/*
* LIBXL_HAVE_SOFT_RESET indicates that libxl supports performing
* 'soft reset' for domains and there is 'soft_reset' shutdown reason
diff --git a/tools/libs/light/libxl_arm.c b/tools/libs/light/libxl_arm.c
index 97c80d7ed0fa..35f76dfc21e4 100644
---
