@@ -2903,6 +2903,17 @@ Currently, only the "sbsa_uart" model is supported for ARM.
=back
+=item B<sve="NUMBER">
+
+To enable SVE, user must specify a number different from zero, maximum 2048 and
+multiple of 128. That value will be the maximum number of SVE registers bits
+that the hypervisor will impose to this guest. If the platform has a lower
+supported bits value, then the domain creation will fail.
+A value equal to zero is the default and it means this guest is not allowed to
+use SVE.
+
+=back
+
=head3 x86
=over 4
@@ -1117,6 +1117,7 @@ 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.Sve = int(xc.arch_arm.sve)
if err := x.ArchX86.MsrRelaxed.fromC(&xc.arch_x86.msr_relaxed);err != nil {
return fmt.Errorf("converting field ArchX86.MsrRelaxed: %v", err)
}
@@ -1602,6 +1603,7 @@ 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 = C.int(x.Sve)
if err := x.ArchX86.MsrRelaxed.toC(&xc.arch_x86.msr_relaxed); err != nil {
return fmt.Errorf("converting field ArchX86.MsrRelaxed: %v", err)
}
@@ -537,6 +537,7 @@ TypeUnion DomainBuildInfoTypeUnion
ArchArm struct {
GicVersion GicVersion
Vuart VuartType
+Sve uint32
}
ArchX86 struct {
MsrRelaxed Defbool
@@ -278,6 +278,11 @@
*/
#define LIBXL_HAVE_BUILDINFO_ARCH_ARM_TEE 1
+/*
+ * libxl_domain_build_info has the arch_arm.sve field.
+ */
+#define LIBXL_HAVE_BUILDINFO_ARCH_ARM_SVE 1
+
/*
* LIBXL_HAVE_SOFT_RESET indicates that libxl supports performing
* 'soft reset' for domains and there is 'soft_reset' shutdown reason
@@ -211,6 +211,8 @@ int libxl__arch_domain_prepare_config(libxl__gc *gc,
return ERROR_FAIL;
}
+ config->arch.sve_vl_bits = d_config->b_info.arch_arm.sve;
+
return 0;
}
@@ -663,6 +663,7 @@ libxl_domain_build_info = Struct("domain_build_info",[
("arch_arm", Struct(None, [("gic_version", libxl_gic_version),
("vuart", libxl_vuart_type),
+ ("sve", uint16),
])),
("arch_x86", Struct(None, [("msr_relaxed", libxl_defbool),
])),
@@ -1316,8 +1316,6 @@ void parse_config_data(const char *config_source,
exit(EXIT_FAILURE);
}
- libxl_physinfo_dispose(&physinfo);
-
config= xlu_cfg_init(stderr, config_source);
if (!config) {
fprintf(stderr, "Failed to allocate for configuration\n");
@@ -2828,6 +2826,26 @@ skip_usbdev:
}
}
+ if (!xlu_cfg_get_long (config, "sve", &l, 0)) {
+ if (!physinfo.cap_arm_sve) {
+ fprintf(stderr, "SVE is not supported by the platform\n");
+ exit(-ERROR_FAIL);
+ } else if (((l % 128) != 0) || (l > 2048)) {
+ fprintf(stderr,
+ "Invalid sve value: %ld. Needs to be <= 2048 and multiple"
+ " of 128\n", l);
+ exit(-ERROR_FAIL);
+ } else if (l > physinfo.arm_sve_vl_bits) {
+ fprintf(stderr,
+ "Invalid sve value: %ld. Platform supports up to %u bits\n",
+ l, physinfo.arm_sve_vl_bits);
+ exit(-ERROR_FAIL);
+ }
+ b_info->arch_arm.sve = l;
+ }
+
+ libxl_physinfo_dispose(&physinfo);
+
parse_vkb_list(config, d_config);
d_config->virtios = NULL;
Add sve parameter in XL configuration to allow guests to use SVE feature. Signed-off-by: Luca Fancellu <luca.fancellu@arm.com> --- 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 | 11 +++++++++++ tools/golang/xenlight/helpers.gen.go | 2 ++ tools/golang/xenlight/types.gen.go | 1 + tools/include/libxl.h | 5 +++++ tools/libs/light/libxl_arm.c | 2 ++ tools/libs/light/libxl_types.idl | 1 + tools/xl/xl_parse.c | 22 ++++++++++++++++++++-- 7 files changed, 42 insertions(+), 2 deletions(-)