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pr=C From: Henry Wang To: CC: Anthony PERARD , Juergen Gross , Henry Wang , Jason Andryuk Subject: [PATCH v4 8/9] tools: Introduce the "xl dt-overlay {attach,detach}" commands Date: Thu, 23 May 2024 15:40:39 +0800 Message-ID: <20240523074040.1611264-9-xin.wang2@amd.com> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20240523074040.1611264-1-xin.wang2@amd.com> References: <20240523074040.1611264-1-xin.wang2@amd.com> MIME-Version: 1.0 Received-SPF: None (SATLEXMB05.amd.com: xin.wang2@amd.com does not designate permitted sender hosts) X-EOPAttributedMessage: 0 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: CO1PEPF000066EC:EE_|BL1PR12MB5804:EE_ X-MS-Office365-Filtering-Correlation-Id: 543ba5a1-7b6f-43ed-6a07-08dc7afbb558 X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0;ARA:13230031|36860700004|376005|82310400017|1800799015; X-Microsoft-Antispam-Message-Info: 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 X-Forefront-Antispam-Report: CIP:165.204.84.17;CTRY:US;LANG:en;SCL:1;SRV:;IPV:CAL;SFV:NSPM;H:SATLEXMB04.amd.com;PTR:InfoDomainNonexistent;CAT:NONE;SFS:(13230031)(36860700004)(376005)(82310400017)(1800799015);DIR:OUT;SFP:1101; X-OriginatorOrg: amd.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 23 May 2024 07:41:07.6055 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: 543ba5a1-7b6f-43ed-6a07-08dc7afbb558 X-MS-Exchange-CrossTenant-Id: 3dd8961f-e488-4e60-8e11-a82d994e183d X-MS-Exchange-CrossTenant-OriginalAttributedTenantConnectingIp: TenantId=3dd8961f-e488-4e60-8e11-a82d994e183d;Ip=[165.204.84.17];Helo=[SATLEXMB04.amd.com] X-MS-Exchange-CrossTenant-AuthSource: CO1PEPF000066EC.namprd05.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: BL1PR12MB5804 With the XEN_DOMCTL_dt_overlay DOMCTL added, users should be able to attach/detach devices from the provided DT overlay to domains. Support this by introducing a new set of "xl dt-overlay" commands and related documentation, i.e. "xl dt-overlay {attach,detach}". Slightly rework the command option parsing logic. Signed-off-by: Henry Wang Reviewed-by: Jason Andryuk Reviewed-by: Stefano Stabellini --- v4: - Add Jason's Reviewed-by tag. v3: - Introduce new API libxl_dt_overlay_domain() and co., instead of reusing existing API libxl_dt_overlay(). - Add in-code comments for the LIBXL_DT_OVERLAY_* macros. - Use find_domain() to avoid getting domain_id from strtol(). v2: - New patch. --- tools/include/libxl.h | 10 +++++++ tools/include/xenctrl.h | 3 +++ tools/libs/ctrl/xc_dt_overlay.c | 31 +++++++++++++++++++++ tools/libs/light/libxl_dt_overlay.c | 28 +++++++++++++++++++ tools/xl/xl_cmdtable.c | 4 +-- tools/xl/xl_vmcontrol.c | 42 ++++++++++++++++++++--------- 6 files changed, 104 insertions(+), 14 deletions(-) diff --git a/tools/include/libxl.h b/tools/include/libxl.h index 62cb07dea6..6cc6d6bf6a 100644 --- a/tools/include/libxl.h +++ b/tools/include/libxl.h @@ -2549,8 +2549,18 @@ libxl_device_pci *libxl_device_pci_list(libxl_ctx *ctx, uint32_t domid, void libxl_device_pci_list_free(libxl_device_pci* list, int num); #if defined(__arm__) || defined(__aarch64__) +/* Values should keep consistent with the op from XEN_SYSCTL_dt_overlay */ +#define LIBXL_DT_OVERLAY_ADD 1 +#define LIBXL_DT_OVERLAY_REMOVE 2 int libxl_dt_overlay(libxl_ctx *ctx, void *overlay, uint32_t overlay_size, uint8_t overlay_op); + +/* Values should keep consistent with the op from XEN_DOMCTL_dt_overlay */ +#define LIBXL_DT_OVERLAY_DOMAIN_ATTACH 1 +#define LIBXL_DT_OVERLAY_DOMAIN_DETACH 2 +int libxl_dt_overlay_domain(libxl_ctx *ctx, uint32_t domain_id, + void *overlay_dt, uint32_t overlay_dt_size, + uint8_t overlay_op); #endif /* diff --git a/tools/include/xenctrl.h b/tools/include/xenctrl.h index 4996855944..9ceca0cffc 100644 --- a/tools/include/xenctrl.h +++ b/tools/include/xenctrl.h @@ -2657,6 +2657,9 @@ int xc_domain_cacheflush(xc_interface *xch, uint32_t domid, #if defined(__arm__) || defined(__aarch64__) int xc_dt_overlay(xc_interface *xch, void *overlay_fdt, uint32_t overlay_fdt_size, uint8_t overlay_op); +int xc_dt_overlay_domain(xc_interface *xch, void *overlay_fdt, + uint32_t overlay_fdt_size, uint8_t overlay_op, + uint32_t domain_id); #endif /* Compat shims */ diff --git a/tools/libs/ctrl/xc_dt_overlay.c b/tools/libs/ctrl/xc_dt_overlay.c index c2224c4d15..ea1da522d1 100644 --- a/tools/libs/ctrl/xc_dt_overlay.c +++ b/tools/libs/ctrl/xc_dt_overlay.c @@ -48,3 +48,34 @@ err: return err; } + +int xc_dt_overlay_domain(xc_interface *xch, void *overlay_fdt, + uint32_t overlay_fdt_size, uint8_t overlay_op, + uint32_t domain_id) +{ + int err; + struct xen_domctl domctl = { + .cmd = XEN_DOMCTL_dt_overlay, + .domain = domain_id, + .u.dt_overlay = { + .overlay_op = overlay_op, + .overlay_fdt_size = overlay_fdt_size, + } + }; + + DECLARE_HYPERCALL_BOUNCE(overlay_fdt, overlay_fdt_size, + XC_HYPERCALL_BUFFER_BOUNCE_IN); + + if ( (err = xc_hypercall_bounce_pre(xch, overlay_fdt)) ) + goto err; + + set_xen_guest_handle(domctl.u.dt_overlay.overlay_fdt, overlay_fdt); + + if ( (err = do_domctl(xch, &domctl)) != 0 ) + PERROR("%s failed", __func__); + +err: + xc_hypercall_bounce_post(xch, overlay_fdt); + + return err; +} diff --git a/tools/libs/light/libxl_dt_overlay.c b/tools/libs/light/libxl_dt_overlay.c index a6c709a6dc..00503b76bd 100644 --- a/tools/libs/light/libxl_dt_overlay.c +++ b/tools/libs/light/libxl_dt_overlay.c @@ -69,3 +69,31 @@ out: return rc; } +int libxl_dt_overlay_domain(libxl_ctx *ctx, uint32_t domain_id, + void *overlay_dt, uint32_t overlay_dt_size, + uint8_t overlay_op) +{ + int rc; + int r; + GC_INIT(ctx); + + if (check_overlay_fdt(gc, overlay_dt, overlay_dt_size)) { + LOG(ERROR, "Overlay DTB check failed"); + rc = ERROR_FAIL; + goto out; + } else { + LOG(DEBUG, "Overlay DTB check passed"); + rc = 0; + } + + r = xc_dt_overlay_domain(ctx->xch, overlay_dt, overlay_dt_size, overlay_op, + domain_id); + if (r) { + LOG(ERROR, "%s: Attaching/Detaching overlay dtb failed.", __func__); + rc = ERROR_FAIL; + } + +out: + GC_FREE; + return rc; +} diff --git a/tools/xl/xl_cmdtable.c b/tools/xl/xl_cmdtable.c index 1f3c6b5897..37770b20e3 100644 --- a/tools/xl/xl_cmdtable.c +++ b/tools/xl/xl_cmdtable.c @@ -634,8 +634,8 @@ const struct cmd_spec cmd_table[] = { #ifdef LIBXL_HAVE_DT_OVERLAY { "dt-overlay", &main_dt_overlay, 0, 1, - "Add/Remove a device tree overlay", - "add/remove <.dtbo>", + "Add/Remove a device tree overlay to Xen device tree, attach/detach the device to a domain", + " <.dtbo> OR <.dtbo> ", "-h print this help\n" }, #endif diff --git a/tools/xl/xl_vmcontrol.c b/tools/xl/xl_vmcontrol.c index 02575d5d36..ccfeec39f1 100644 --- a/tools/xl/xl_vmcontrol.c +++ b/tools/xl/xl_vmcontrol.c @@ -1268,32 +1268,46 @@ int main_create(int argc, char **argv) #ifdef LIBXL_HAVE_DT_OVERLAY int main_dt_overlay(int argc, char **argv) { - const char *overlay_ops = NULL; const char *overlay_config_file = NULL; void *overlay_dtb = NULL; int rc; uint8_t op; int overlay_dtb_size = 0; - const int overlay_add_op = 1; - const int overlay_remove_op = 2; + uint32_t domain_id = 0; + bool domain_op = false; if (argc < 2) { help("dt-overlay"); return EXIT_FAILURE; } - overlay_ops = argv[1]; - overlay_config_file = argv[2]; - - if (strcmp(overlay_ops, "add") == 0) - op = overlay_add_op; - else if (strcmp(overlay_ops, "remove") == 0) - op = overlay_remove_op; - else { + if (strcmp(argv[optind], "add") == 0) + op = LIBXL_DT_OVERLAY_ADD; + else if (strcmp(argv[optind], "remove") == 0) + op = LIBXL_DT_OVERLAY_REMOVE; + else if (strcmp(argv[optind], "attach") == 0) { + op = LIBXL_DT_OVERLAY_DOMAIN_ATTACH; + domain_op = true; + } else if (strcmp(argv[optind], "detach") == 0) { + op = LIBXL_DT_OVERLAY_DOMAIN_DETACH; + domain_op = true; + } else { fprintf(stderr, "Invalid dt overlay operation\n"); return EXIT_FAILURE; } + overlay_config_file = argv[optind+1]; + + if (domain_op) { + if (argc <= optind + 2) { + fprintf(stderr, "Missing domain ID\n"); + help("dt-overlay"); + return EXIT_FAILURE; + } else { + domain_id = find_domain(argv[optind+2]); + } + } + if (overlay_config_file) { rc = libxl_read_file_contents(ctx, overlay_config_file, &overlay_dtb, &overlay_dtb_size); @@ -1309,7 +1323,11 @@ int main_dt_overlay(int argc, char **argv) return EXIT_FAILURE; } - rc = libxl_dt_overlay(ctx, overlay_dtb, overlay_dtb_size, op); + if (!domain_op) + rc = libxl_dt_overlay(ctx, overlay_dtb, overlay_dtb_size, op); + else + rc = libxl_dt_overlay_domain(ctx, domain_id, overlay_dtb, + overlay_dtb_size, op); free(overlay_dtb);