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Fri, 13 Dec 2024 08:28:32 -0800 (PST) From: Carlo Nonato To: xen-devel@lists.xenproject.org Cc: andrea.bastoni@minervasys.tech, marco.solieri@minervasys.tech, Carlo Nonato , Anthony PERARD , Nick Rosbrook , George Dunlap , Juergen Gross Subject: [PATCH v12 06/12] tools: add support for cache coloring configuration Date: Fri, 13 Dec 2024 17:28:09 +0100 Message-ID: <20241213162815.9196-7-carlo.nonato@minervasys.tech> X-Mailer: git-send-email 2.43.0 In-Reply-To: <20241213162815.9196-1-carlo.nonato@minervasys.tech> References: <20241213162815.9196-1-carlo.nonato@minervasys.tech> MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable X-ZohoMail-DKIM: pass (identity @minervasys-tech.20230601.gappssmtp.com) X-ZM-MESSAGEID: 1734107346225116600 Content-Type: text/plain; charset="utf-8" Add a new "llc_colors" parameter that defines the LLC color assignment for a domain. The user can specify one or more color ranges using the same syntax used everywhere else for color config described in the documentation. The parameter is defined as a list of strings that represent the color ranges. Documentation is also added. Golang bindings are regenerated. Based on original work from: Luca Miccio Signed-off-by: Carlo Nonato Signed-off-by: Marco Solieri Reviewed-by: Anthony PERARD --- v12: - no changes v11: - turned unsigned int to uint32_t in xc_domain_set_llc_colors() - return -1 in case of error instead of ENOMEM in xc_domain_set_llc_colors() - added regenerated go bindings v10: - no changes v9: - turned warning into error in case of coloring not enabled v8: - warn the user in case of coloring not supported at hypervisor level v7: - removed unneeded NULL check before xc_hypercall_buffer_free() in xc_domain_set_llc_colors() v6: - no edits v5: - added LIBXL_HAVE_BUILDINFO_LLC_COLORS - moved color configuration in xc_domain_set_llc_colors() cause of the new hypercall v4: - removed overlapping color ranges checks during parsing - moved hypercall buffer initialization in libxenctrl --- docs/man/xl.cfg.5.pod.in | 6 +++++ tools/golang/xenlight/helpers.gen.go | 16 ++++++++++++ tools/golang/xenlight/types.gen.go | 1 + tools/include/libxl.h | 5 ++++ tools/include/xenctrl.h | 9 +++++++ tools/libs/ctrl/xc_domain.c | 34 +++++++++++++++++++++++++ tools/libs/light/libxl_create.c | 18 +++++++++++++ tools/libs/light/libxl_types.idl | 1 + tools/xl/xl_parse.c | 38 +++++++++++++++++++++++++++- 9 files changed, 127 insertions(+), 1 deletion(-) diff --git a/docs/man/xl.cfg.5.pod.in b/docs/man/xl.cfg.5.pod.in index ac3f88fd57..8e1422104e 100644 --- a/docs/man/xl.cfg.5.pod.in +++ b/docs/man/xl.cfg.5.pod.in @@ -3074,6 +3074,12 @@ raised. =20 =3Dover 4 =20 +=3Ditem B + +Specify the Last Level Cache (LLC) color configuration for the guest. +B can be either a single color value or a hypen-separated closed +interval of colors (such as "0-4"). + =3Ditem B =20 An optional integer parameter specifying the number of SPIs (Shared diff --git a/tools/golang/xenlight/helpers.gen.go b/tools/golang/xenlight/h= elpers.gen.go index fe5110474d..90846ea8e8 100644 --- a/tools/golang/xenlight/helpers.gen.go +++ b/tools/golang/xenlight/helpers.gen.go @@ -1097,6 +1097,14 @@ if err :=3D x.Iomem[i].fromC(&v); err !=3D nil { return fmt.Errorf("converting field Iomem: %v", err) } } } +x.LlcColors =3D nil +if n :=3D int(xc.num_llc_colors); n > 0 { +cLlcColors :=3D (*[1<<28]C.uint32_t)(unsafe.Pointer(xc.llc_colors))[:n:n] +x.LlcColors =3D make([]uint32, n) +for i, v :=3D range cLlcColors { +x.LlcColors[i] =3D uint32(v) +} +} if err :=3D x.ClaimMode.fromC(&xc.claim_mode);err !=3D nil { return fmt.Errorf("converting field ClaimMode: %v", err) } @@ -1453,6 +1461,14 @@ return fmt.Errorf("converting field Iomem: %v", err) } } } +if numLlcColors :=3D len(x.LlcColors); numLlcColors > 0 { +xc.llc_colors =3D (*C.uint32_t)(C.malloc(C.size_t(numLlcColors*numLlcColor= s))) +xc.num_llc_colors =3D C.int(numLlcColors) +cLlcColors :=3D (*[1<<28]C.uint32_t)(unsafe.Pointer(xc.llc_colors))[:numLl= cColors:numLlcColors] +for i,v :=3D range x.LlcColors { +cLlcColors[i] =3D C.uint32_t(v) +} +} if err :=3D x.ClaimMode.toC(&xc.claim_mode); err !=3D nil { return fmt.Errorf("converting field ClaimMode: %v", err) } diff --git a/tools/golang/xenlight/types.gen.go b/tools/golang/xenlight/typ= es.gen.go index c9e45b306f..e7667f1ce3 100644 --- a/tools/golang/xenlight/types.gen.go +++ b/tools/golang/xenlight/types.gen.go @@ -575,6 +575,7 @@ SchedParams DomainSchedParams Ioports []IoportRange Irqs []uint32 Iomem []IomemRange +LlcColors []uint32 ClaimMode Defbool EventChannels uint32 Kernel string diff --git a/tools/include/libxl.h b/tools/include/libxl.h index 8d32428ea9..f8fe4afd7d 100644 --- a/tools/include/libxl.h +++ b/tools/include/libxl.h @@ -1379,6 +1379,11 @@ void libxl_mac_copy(libxl_ctx *ctx, libxl_mac *dst, = const libxl_mac *src); */ #define LIBXL_HAVE_BUILDINFO_HVM_SYSTEM_FIRMWARE =20 +/* + * The libxl_domain_build_info has the llc_colors array. + */ +#define LIBXL_HAVE_BUILDINFO_LLC_COLORS 1 + /* * ERROR_REMUS_XXX error code only exists from Xen 4.5, Xen 4.6 and it * is changed to ERROR_CHECKPOINT_XXX in Xen 4.7 diff --git a/tools/include/xenctrl.h b/tools/include/xenctrl.h index 29617585c5..d6d93a2e8f 100644 --- a/tools/include/xenctrl.h +++ b/tools/include/xenctrl.h @@ -2667,6 +2667,15 @@ int xc_livepatch_replace(xc_interface *xch, char *na= me, uint32_t timeout, uint32 int xc_domain_cacheflush(xc_interface *xch, uint32_t domid, xen_pfn_t start_pfn, xen_pfn_t nr_pfns); =20 +/* + * Set LLC colors for a domain. + * It can only be used directly after domain creation. An attempt to use it + * afterwards will result in an error. + */ +int xc_domain_set_llc_colors(xc_interface *xch, uint32_t domid, + const uint32_t *llc_colors, + uint32_t num_llc_colors); + #if defined(__arm__) || defined(__aarch64__) int xc_dt_overlay(xc_interface *xch, void *overlay_fdt, uint32_t overlay_fdt_size, uint8_t overlay_op); diff --git a/tools/libs/ctrl/xc_domain.c b/tools/libs/ctrl/xc_domain.c index e3538ec0ba..2ddc3f4f42 100644 --- a/tools/libs/ctrl/xc_domain.c +++ b/tools/libs/ctrl/xc_domain.c @@ -2195,6 +2195,40 @@ int xc_domain_soft_reset(xc_interface *xch, domctl.domain =3D domid; return do_domctl(xch, &domctl); } + +int xc_domain_set_llc_colors(xc_interface *xch, uint32_t domid, + const uint32_t *llc_colors, + uint32_t num_llc_colors) +{ + struct xen_domctl domctl =3D {}; + DECLARE_HYPERCALL_BUFFER(uint32_t, local); + int ret =3D -1; + + if ( num_llc_colors ) + { + size_t bytes =3D sizeof(uint32_t) * num_llc_colors; + + local =3D xc_hypercall_buffer_alloc(xch, local, bytes); + if ( local =3D=3D NULL ) + { + PERROR("Could not allocate LLC colors for set_llc_colors"); + goto out; + } + memcpy(local, llc_colors, bytes); + set_xen_guest_handle(domctl.u.set_llc_colors.llc_colors, local); + } + + domctl.cmd =3D XEN_DOMCTL_set_llc_colors; + domctl.domain =3D domid; + domctl.u.set_llc_colors.num_llc_colors =3D num_llc_colors; + + ret =3D do_domctl(xch, &domctl); + +out: + xc_hypercall_buffer_free(xch, local); + + return ret; +} /* * Local variables: * mode: C diff --git a/tools/libs/light/libxl_create.c b/tools/libs/light/libxl_creat= e.c index edeadd57ef..e03599ea99 100644 --- a/tools/libs/light/libxl_create.c +++ b/tools/libs/light/libxl_create.c @@ -747,6 +747,24 @@ int libxl__domain_make(libxl__gc *gc, libxl_domain_con= fig *d_config, /* A new domain now exists */ *domid =3D local_domid; =20 + ret =3D xc_domain_set_llc_colors(ctx->xch, local_domid, + b_info->llc_colors, + b_info->num_llc_colors); + if (ret < 0) { + if (errno =3D=3D EOPNOTSUPP) { + if (b_info->num_llc_colors > 0) { + LOGED(ERROR, local_domid, + "LLC coloring not enabled in the hypervisor"); + rc =3D ERROR_FAIL; + goto out; + } + } else { + LOGED(ERROR, local_domid, "LLC colors allocation faile= d"); + rc =3D ERROR_FAIL; + goto out; + } + } + rc =3D libxl__is_domid_recent(gc, local_domid, &recent); if (rc) goto out; diff --git a/tools/libs/light/libxl_types.idl b/tools/libs/light/libxl_type= s.idl index 4e65e6fda5..bd4b8721ff 100644 --- a/tools/libs/light/libxl_types.idl +++ b/tools/libs/light/libxl_types.idl @@ -616,6 +616,7 @@ libxl_domain_build_info =3D Struct("domain_build_info",[ ("ioports", Array(libxl_ioport_range, "num_ioports")), ("irqs", Array(uint32, "num_irqs")), ("iomem", Array(libxl_iomem_range, "num_iomem")), + ("llc_colors", Array(uint32, "num_llc_colors")), ("claim_mode", libxl_defbool), ("event_channels", uint32), ("kernel", string), diff --git a/tools/xl/xl_parse.c b/tools/xl/xl_parse.c index e3a4800f6e..3d85be7dd4 100644 --- a/tools/xl/xl_parse.c +++ b/tools/xl/xl_parse.c @@ -1296,7 +1296,7 @@ void parse_config_data(const char *config_source, XLU_ConfigList *cpus, *vbds, *nics, *pcis, *cvfbs, *cpuids, *vtpms, *usbctrls, *usbdevs, *p9devs, *vdispls, *pvcallsifs_dev= s; XLU_ConfigList *channels, *ioports, *irqs, *iomem, *viridian, *dtdevs, - *mca_caps, *smbios; + *mca_caps, *smbios, *llc_colors; int num_ioports, num_irqs, num_iomem, num_cpus, num_viridian, num_mca_= caps; int num_smbios; int pci_power_mgmt =3D 0; @@ -1304,6 +1304,7 @@ void parse_config_data(const char *config_source, int pci_permissive =3D 0; int pci_seize =3D 0; int i, e; + int num_llc_colors; char *kernel_basename; =20 libxl_domain_create_info *c_info =3D &d_config->c_info; @@ -1447,6 +1448,41 @@ void parse_config_data(const char *config_source, if (!xlu_cfg_get_long (config, "maxmem", &l, 0)) b_info->max_memkb =3D l * 1024; =20 + if (!xlu_cfg_get_list(config, "llc_colors", &llc_colors, &num_llc_colo= rs, 0)) { + int cur_index =3D 0; + + b_info->num_llc_colors =3D 0; + for (i =3D 0; i < num_llc_colors; i++) { + uint32_t start =3D 0, end =3D 0, k; + + buf =3D xlu_cfg_get_listitem(llc_colors, i); + if (!buf) { + fprintf(stderr, + "xl: Can't get element %d in LLC color list\n", i); + exit(1); + } + + if (sscanf(buf, "%" SCNu32 "-%" SCNu32, &start, &end) !=3D 2) { + if (sscanf(buf, "%" SCNu32, &start) !=3D 1) { + fprintf(stderr, "xl: Invalid LLC color range: %s\n", b= uf); + exit(1); + } + end =3D start; + } else if (start > end) { + fprintf(stderr, + "xl: Start LLC color is greater than end: %s\n", b= uf); + exit(1); + } + + b_info->num_llc_colors +=3D (end - start) + 1; + b_info->llc_colors =3D (uint32_t *)realloc(b_info->llc_colors, + sizeof(*b_info->llc_colors) * b_info->num_llc_colo= rs); + + for (k =3D start; k <=3D end; k++) + b_info->llc_colors[cur_index++] =3D k; + } + } + if (!xlu_cfg_get_long (config, "vcpus", &l, 0)) { vcpus =3D l; if (libxl_cpu_bitmap_alloc(ctx, &b_info->avail_vcpus, l)) { --=20 2.43.0