[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index] [PATCH v2 09/10] xen/tools: add sve parameter in XL configuration
Add sve parameter in XL configuration to allow guests to use SVE feature. Signed-off-by: Luca Fancellu <luca.fancellu@xxxxxxx> --- 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 | 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 | 25 +++++++++++++++++++++++-- 7 files changed, 45 insertions(+), 2 deletions(-) diff --git a/docs/man/xl.cfg.5.pod.in b/docs/man/xl.cfg.5.pod.in index 024bceeb61b2..bb138322e290 100644 --- a/docs/man/xl.cfg.5.pod.in +++ b/docs/man/xl.cfg.5.pod.in @@ -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 diff --git a/tools/golang/xenlight/helpers.gen.go b/tools/golang/xenlight/helpers.gen.go index aad9645222a1..fb3b55e0cc36 100644 --- a/tools/golang/xenlight/helpers.gen.go +++ b/tools/golang/xenlight/helpers.gen.go @@ -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 = uint16(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.uint16_t(x.ArchArm.Sve) if err := x.ArchX86.MsrRelaxed.toC(&xc.arch_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 88ec0260404f..8fd0d9b668a7 100644 --- a/tools/golang/xenlight/types.gen.go +++ b/tools/golang/xenlight/types.gen.go @@ -537,6 +537,7 @@ TypeUnion DomainBuildInfoTypeUnion ArchArm struct { GicVersion GicVersion Vuart VuartType +Sve uint16 } ArchX86 struct { MsrRelaxed Defbool diff --git a/tools/include/libxl.h b/tools/include/libxl.h index d652895075a0..1057962e2e3f 100644 --- a/tools/include/libxl.h +++ b/tools/include/libxl.h @@ -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 diff --git a/tools/libs/light/libxl_arm.c b/tools/libs/light/libxl_arm.c index ddc7b2a15975..31f30e054bf4 100644 --- a/tools/libs/light/libxl_arm.c +++ b/tools/libs/light/libxl_arm.c @@ -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; } diff --git a/tools/libs/light/libxl_types.idl b/tools/libs/light/libxl_types.idl index 0e90b6b408ec..ed21d32e703c 100644 --- a/tools/libs/light/libxl_types.idl +++ b/tools/libs/light/libxl_types.idl @@ -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), ])), diff --git a/tools/xl/xl_parse.c b/tools/xl/xl_parse.c index 853e9f357a1a..5574a91ce5a7 100644 --- a/tools/xl/xl_parse.c +++ b/tools/xl/xl_parse.c @@ -12,6 +12,7 @@ * GNU Lesser General Public License for more details. */ +#include <arm_arch_capabilities.h> #include <ctype.h> #include <inttypes.h> #include <limits.h> @@ -1316,8 +1317,6 @@ 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 +2827,28 @@ skip_usbdev: } } + if (!xlu_cfg_get_long (config, "sve", &l, 0)) { + unsigned int arm_sve_vl = + arch_capabilities_arm_sve(physinfo.arch_capabilities); + if (!arm_sve_vl) { + 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 > arm_sve_vl) { + fprintf(stderr, + "Invalid sve value: %ld. Platform supports up to %u bits\n", + l, arm_sve_vl); + exit(-ERROR_FAIL); + } + b_info->arch_arm.sve = l; + } + + libxl_physinfo_dispose(&physinfo); + parse_vkb_list(config, d_config); d_config->virtios = NULL; -- 2.34.1
|
Lists.xenproject.org is hosted with RackSpace, monitoring our |