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[94.34.131.227]) by smtp.gmail.com with ESMTPSA id 4fb4d7f45d1cf-5cbb629e17dsm446938a12.34.2024.10.25.02.50.51 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Fri, 25 Oct 2024 02:50:51 -0700 (PDT) X-BeenThere: xen-devel@lists.xenproject.org List-Id: Xen developer discussion List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Errors-To: xen-devel-bounces@lists.xenproject.org Precedence: list Sender: "Xen-devel" X-Inumbo-ID: 9fe98e11-92b6-11ef-a0bf-8be0dac302b0 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=minervasys-tech.20230601.gappssmtp.com; s=20230601; t=1729849853; x=1730454653; darn=lists.xenproject.org; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:from:to:cc:subject:date :message-id:reply-to; bh=1hChW1WByTE0S7v65A3IF1Wpf4beUOHE+Ux/hoP7V1E=; b=SPoyuTjfUt4YLpJGK4auCqGEIwcO6lxMSn81w3Md0CLLwGBJoKi/qYn7X/34jV051P YbIi4v/XUsqHmvLaoJcrmSHpq7F1LUenD33Y0PQ187kNAJfzJiZQpOdevC62KWu9Ls3d LzfUQWW7+MswU2y+xdwfduTKPvPFvcaC4H8Sg6S3DCBddjGoZgYfyWpWGwNtzWgYfsMq pAdSiCLTYPsF60ZG+rs6hCO/SORUNYCuwaDXyLRxct35qEUO+3byMX4XkjLnmP23Tifa bHbqgUz8H5J4Me5PlTnQvJo8/o8MXyBExGLCr83dGxU6mQ+Cr/Hd+Xw9peUjYKQOgPWX Hcig== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1729849853; x=1730454653; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:x-gm-message-state:from:to:cc :subject:date:message-id:reply-to; bh=1hChW1WByTE0S7v65A3IF1Wpf4beUOHE+Ux/hoP7V1E=; b=vSvyxMzt2XgOMxWzUbNLwH+szprnXRcfJkUDiWtMq9CB4o8IeK4mpiQwkggIq75mqY YrDUdhFstS1BpMfPKcTj0dTIzBUbP+Zo501QoI4BHQ66CTDKIN2yeV7dkgljvEcCgvlX OOVao6/lU10UXvRVA9xWYCU5YXugnHy1lQqgUjEUIpNBu3GAO2q4K3g/rmoKUxUeRWpH 0/i/MI8sgBfcSksupJD6AFzxCNT7btNKERtnstls2u8sjiQbL7yw3vsToPuIwB5xL6HS /6+YbRm9pfBTJ9P/M+G/SIZfg5+k0bARTObb1DaS1PWTQmICFnN1bUkYSDyMQhmK+3Pi WBuw== X-Gm-Message-State: AOJu0YwcORhL1QRvBwHjkuOOYftRdYbRBk7kvMqwYrtJ4iDAd9b6E56N QEXj/FyopQbxu0+KIJnQTGQ01n2dIW/pZxD99YefKcmy4+jtcAuof2QGC/ZXFvX2UjVnqEXjd2o hnEQ= X-Google-Smtp-Source: AGHT+IF3pLLLkAll6z5J5J/UKEtgW/qIsQikS8BrYgvTms937aRmbhvhbk5vJxG5SCXXl7sMUyo6Vg== X-Received: by 2002:a05:6402:510c:b0:5c9:7d96:772d with SMTP id 4fb4d7f45d1cf-5cb8b24657cmr7603270a12.22.1729849852997; Fri, 25 Oct 2024 02:50:52 -0700 (PDT) From: Carlo Nonato To: xen-devel@lists.xenproject.org Cc: andrea.bastoni@minervasys.tech, Carlo Nonato , Anthony PERARD , Juergen Gross , Marco Solieri Subject: [PATCH v9 06/13] tools: add support for cache coloring configuration Date: Fri, 25 Oct 2024 11:50:07 +0200 Message-ID: <20241025095014.42376-7-carlo.nonato@minervasys.tech> X-Mailer: git-send-email 2.43.0 In-Reply-To: <20241025095014.42376-1-carlo.nonato@minervasys.tech> References: <20241025095014.42376-1-carlo.nonato@minervasys.tech> MIME-Version: 1.0 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. Based on original work from: Luca Miccio Signed-off-by: Carlo Nonato Signed-off-by: Marco Solieri --- 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/include/libxl.h | 5 +++++ tools/include/xenctrl.h | 9 ++++++++ tools/libs/ctrl/xc_domain.c | 35 +++++++++++++++++++++++++++++ tools/libs/light/libxl_create.c | 18 +++++++++++++++ tools/libs/light/libxl_types.idl | 1 + tools/xl/xl_parse.c | 38 +++++++++++++++++++++++++++++++- 7 files changed, 111 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. =over 4 +=item 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"). + =item B An optional integer parameter specifying the number of SPIs (Shared 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 +/* + * 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..aa2b4b04f3 100644 --- a/tools/include/xenctrl.h +++ b/tools/include/xenctrl.h @@ -2667,6 +2667,15 @@ int xc_livepatch_replace(xc_interface *xch, char *name, uint32_t timeout, uint32 int xc_domain_cacheflush(xc_interface *xch, uint32_t domid, xen_pfn_t start_pfn, xen_pfn_t nr_pfns); +/* + * 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 unsigned int *llc_colors, + unsigned int 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..4ed339e6e4 100644 --- a/tools/libs/ctrl/xc_domain.c +++ b/tools/libs/ctrl/xc_domain.c @@ -2195,6 +2195,41 @@ int xc_domain_soft_reset(xc_interface *xch, domctl.domain = domid; return do_domctl(xch, &domctl); } + +int xc_domain_set_llc_colors(xc_interface *xch, uint32_t domid, + const unsigned int *llc_colors, + unsigned int num_llc_colors) +{ + struct xen_domctl domctl = {}; + DECLARE_HYPERCALL_BUFFER(uint32_t, local); + int ret = -1; + + if ( num_llc_colors ) + { + size_t bytes = sizeof(uint32_t) * num_llc_colors; + + local = xc_hypercall_buffer_alloc(xch, local, bytes); + if ( local == NULL ) + { + PERROR("Could not allocate LLC colors for set_llc_colors"); + ret = -ENOMEM; + goto out; + } + memcpy(local, llc_colors, bytes); + set_xen_guest_handle(domctl.u.set_llc_colors.llc_colors, local); + } + + domctl.cmd = XEN_DOMCTL_set_llc_colors; + domctl.domain = domid; + domctl.u.set_llc_colors.num_llc_colors = num_llc_colors; + + ret = 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_create.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_config *d_config, /* A new domain now exists */ *domid = local_domid; + ret = xc_domain_set_llc_colors(ctx->xch, local_domid, + b_info->llc_colors, + b_info->num_llc_colors); + if (ret < 0) { + if (errno == EOPNOTSUPP) { + if (b_info->num_llc_colors > 0) { + LOGED(ERROR, local_domid, + "LLC coloring not enabled in the hypervisor"); + rc = ERROR_FAIL; + goto out; + } + } else { + LOGED(ERROR, local_domid, "LLC colors allocation failed"); + rc = ERROR_FAIL; + goto out; + } + } + rc = 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_types.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 = 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_devs; 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 = 0; @@ -1304,6 +1304,7 @@ void parse_config_data(const char *config_source, int pci_permissive = 0; int pci_seize = 0; int i, e; + int num_llc_colors; char *kernel_basename; libxl_domain_create_info *c_info = &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 = l * 1024; + if (!xlu_cfg_get_list(config, "llc_colors", &llc_colors, &num_llc_colors, 0)) { + int cur_index = 0; + + b_info->num_llc_colors = 0; + for (i = 0; i < num_llc_colors; i++) { + uint32_t start = 0, end = 0, k; + + buf = 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) != 2) { + if (sscanf(buf, "%" SCNu32, &start) != 1) { + fprintf(stderr, "xl: Invalid LLC color range: %s\n", buf); + exit(1); + } + end = start; + } else if (start > end) { + fprintf(stderr, + "xl: Start LLC color is greater than end: %s\n", buf); + exit(1); + } + + b_info->num_llc_colors += (end - start) + 1; + b_info->llc_colors = (uint32_t *)realloc(b_info->llc_colors, + sizeof(*b_info->llc_colors) * b_info->num_llc_colors); + + for (k = start; k <= end; k++) + b_info->llc_colors[cur_index++] = k; + } + } + if (!xlu_cfg_get_long (config, "vcpus", &l, 0)) { vcpus = l; if (libxl_cpu_bitmap_alloc(ctx, &b_info->avail_vcpus, l)) {