From patchwork Tue Nov 24 08:01:59 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Paul Durrant X-Patchwork-Id: 11927413 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-15.9 required=3.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER, INCLUDES_PATCH,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS, UNWANTED_LANGUAGE_BODY,URIBL_BLOCKED,USER_AGENT_GIT autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 7ADC6C64E7B for ; Tue, 24 Nov 2020 08:31:09 +0000 (UTC) Received: from lists.xenproject.org (lists.xenproject.org [192.237.175.120]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id 06EB120708 for ; Tue, 24 Nov 2020 08:31:08 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (1024-bit key) header.d=xen.org header.i=@xen.org header.b="16qYaUG1" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 06EB120708 Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=xen.org Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=xen-devel-bounces@lists.xenproject.org Received: from list by lists.xenproject.org with outflank-mailman.35505.67084 (Exim 4.92) (envelope-from ) id 1khTio-0003Rj-Sb; Tue, 24 Nov 2020 08:30:46 +0000 X-Outflank-Mailman: Message body and most headers restored to incoming version Received: by outflank-mailman (output) from mailman id 35505.67084; Tue, 24 Nov 2020 08:30:46 +0000 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" Received: from localhost ([127.0.0.1] helo=lists.xenproject.org) by lists.xenproject.org with esmtp (Exim 4.92) (envelope-from ) id 1khTio-0003Ra-LQ; Tue, 24 Nov 2020 08:30:46 +0000 Received: by outflank-mailman (input) for mailman id 35505; Tue, 24 Nov 2020 08:30:45 +0000 Received: from mail.xenproject.org ([104.130.215.37]) by lists.xenproject.org with esmtp (Exim 4.92) (envelope-from ) id 1khTim-0003PM-V8 for xen-devel@lists.xenproject.org; Tue, 24 Nov 2020 08:30:44 +0000 Received: from xenbits.xenproject.org ([104.239.192.120]) by mail.xenproject.org with esmtp (Exim 4.92) (envelope-from ) id 1khTim-0006al-8x; Tue, 24 Nov 2020 08:30:44 +0000 Received: from ec2-54-145-241-208.compute-1.amazonaws.com ([54.145.241.208] helo=ip-10-0-29-170.ec2.internal) by xenbits.xenproject.org with esmtpsa (TLS1.2:ECDHE_RSA_AES_128_GCM_SHA256:128) (Exim 4.92) (envelope-from ) id 1khTH5-0001hp-N5; Tue, 24 Nov 2020 08:02:07 +0000 Received: from mail.xenproject.org ([104.130.215.37]) by lists.xenproject.org with esmtp (Exim 4.92) (envelope-from ) id 1khTim-0003PM-V8 for xen-devel@lists.xenproject.org; Tue, 24 Nov 2020 08:30:44 +0000 DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=xen.org; s=20200302mail; h=References:In-Reply-To:Message-Id:Date:Subject:Cc:To:From; bh=/AMoYjWi5H9dseAs4K+GDd7cbQWU+SnJYanWAEcg98o=; b=16qYaUG1cZYFRWuRFo0fIOqI5 fgSidJvEJPOnjNUnMB41AcXK3Ormm8340GCfsUGTxOYqDHVVtW0dfIfz1ydiOUgwriiR4p45diZM3 dj35qyPfIn/ftKCHqFPqY6mXaTbe2OaiVd8Mr1RayqjrQtQwHJhbmKLOxMQKUrZaoIyYc=; Received: from xenbits.xenproject.org ([104.239.192.120]) by mail.xenproject.org with esmtp (Exim 4.92) (envelope-from ) id 1khTim-0006al-8x; Tue, 24 Nov 2020 08:30:44 +0000 Received: from ec2-54-145-241-208.compute-1.amazonaws.com ([54.145.241.208] helo=ip-10-0-29-170.ec2.internal) by xenbits.xenproject.org with esmtpsa (TLS1.2:ECDHE_RSA_AES_128_GCM_SHA256:128) (Exim 4.92) (envelope-from ) id 1khTH5-0001hp-N5; Tue, 24 Nov 2020 08:02:07 +0000 From: Paul Durrant To: xen-devel@lists.xenproject.org Cc: Paul Durrant , Ian Jackson , Wei Liu , Anthony PERARD Subject: [PATCH v4 23/23] xl / libxl: support 'xl pci-attach/detach' by name Date: Tue, 24 Nov 2020 08:01:59 +0000 Message-Id: <20201124080159.11912-24-paul@xen.org> X-Mailer: git-send-email 2.11.0 In-Reply-To: <20201124080159.11912-1-paul@xen.org> References: <20201124080159.11912-1-paul@xen.org> From: Paul Durrant This patch adds a 'name' field into the idl for 'libxl_device_pci' and libxlu_pci_parse_spec_string() is modified to parse the new 'name' parameter of PCI_SPEC_STRING detailed in the updated documention in xl-pci-configuration(5). If the 'name' field is non-NULL then both libxl_device_pci_add() and libxl_device_pci_remove() will use it to look up the device BDF in the list of assignable devices. Signed-off-by: Paul Durrant --- Cc: Ian Jackson Cc: Wei Liu Cc: Anthony PERARD --- tools/include/libxl.h | 6 ++++ tools/libs/light/libxl_pci.c | 67 +++++++++++++++++++++++++++++++++++++--- tools/libs/light/libxl_types.idl | 1 + tools/libs/util/libxlu_pci.c | 7 ++++- 4 files changed, 75 insertions(+), 6 deletions(-) diff --git a/tools/include/libxl.h b/tools/include/libxl.h index 4025d3a3d4..5b55a20155 100644 --- a/tools/include/libxl.h +++ b/tools/include/libxl.h @@ -485,6 +485,12 @@ #define LIBXL_HAVE_PCI_ASSIGNABLE_NAME 1 /* + * LIBXL_HAVE_DEVICE_PCI_NAME indicates that the 'name' field of + * libxl_device_pci is defined. + */ +#define LIBXL_HAVE_DEVICE_PCI_NAME 1 + +/* * libxl ABI compatibility * * The only guarantee which libxl makes regarding ABI compatibility diff --git a/tools/libs/light/libxl_pci.c b/tools/libs/light/libxl_pci.c index 1da7fd5508..c45f4c6a40 100644 --- a/tools/libs/light/libxl_pci.c +++ b/tools/libs/light/libxl_pci.c @@ -60,6 +60,10 @@ static void libxl_create_pci_backend_device(libxl__gc *gc, int num, const libxl_device_pci *pci) { + if (pci->name) { + flexarray_append(back, GCSPRINTF("name-%d", num)); + flexarray_append(back, GCSPRINTF("%s", pci->name)); + } flexarray_append(back, GCSPRINTF("key-%d", num)); flexarray_append(back, GCSPRINTF(PCI_BDF, pci->bdf.domain, pci->bdf.bus, pci->bdf.dev, pci->bdf.func)); flexarray_append(back, GCSPRINTF("dev-%d", num)); @@ -284,6 +288,7 @@ retry_transaction: retry_transaction2: t = xs_transaction_start(ctx->xsh); + xs_rm(ctx->xsh, t, GCSPRINTF("%s/name-%d", be_path, i)); xs_rm(ctx->xsh, t, GCSPRINTF("%s/state-%d", be_path, i)); xs_rm(ctx->xsh, t, GCSPRINTF("%s/key-%d", be_path, i)); xs_rm(ctx->xsh, t, GCSPRINTF("%s/dev-%d", be_path, i)); @@ -322,6 +327,12 @@ retry_transaction2: xs_write(ctx->xsh, t, GCSPRINTF("%s/vdevfn-%d", be_path, j - 1), tmp, strlen(tmp)); xs_rm(ctx->xsh, t, tmppath); } + tmppath = GCSPRINTF("%s/name-%d", be_path, j); + tmp = libxl__xs_read(gc, t, tmppath); + if (tmp) { + xs_write(ctx->xsh, t, GCSPRINTF("%s/name-%d", be_path, j - 1), tmp, strlen(tmp)); + xs_rm(ctx->xsh, t, tmppath); + } } if (!xs_transaction_end(ctx->xsh, t, 0)) if (errno == EAGAIN) @@ -1619,6 +1630,23 @@ void libxl__device_pci_add(libxl__egc *egc, uint32_t domid, pas->starting = starting; pas->callback = device_pci_add_stubdom_done; + if (pci->name) { + libxl_pci_bdf *pcibdf = + libxl_device_pci_assignable_name2bdf(CTX, pci->name); + + if (!pcibdf) { + rc = ERROR_FAIL; + goto out; + } + + LOGD(DETAIL, domid, "'%s' -> %04x:%02x:%02x.%u", pci->name, + pcibdf->domain, pcibdf->bus, pcibdf->dev, pcibdf->func); + + libxl_pci_bdf_copy(CTX, &pci->bdf, pcibdf); + libxl_pci_bdf_dispose(pcibdf); + free(pcibdf); + } + if (libxl__domain_type(gc, domid) == LIBXL_DOMAIN_TYPE_HVM) { rc = xc_test_assign_device(ctx->xch, domid, pci_encode_bdf(&pci->bdf)); @@ -1767,11 +1795,19 @@ static void device_pci_add_done(libxl__egc *egc, libxl_device_pci *pci = &pas->pci; if (rc) { - LOGD(ERROR, domid, - "libxl__device_pci_add failed for " - "PCI device %x:%x:%x.%x (rc %d)", - pci->bdf.domain, pci->bdf.bus, pci->bdf.dev, pci->bdf.func, - rc); + if (pci->name) { + LOGD(ERROR, domid, + "libxl__device_pci_add failed for " + "PCI device '%s' (rc %d)", + pci->name, + rc); + } else { + LOGD(ERROR, domid, + "libxl__device_pci_add failed for " + "PCI device %x:%x:%x.%x (rc %d)", + pci->bdf.domain, pci->bdf.bus, pci->bdf.dev, pci->bdf.func, + rc); + } pci_info_xs_remove(gc, &pci->bdf, "domid"); } libxl_device_pci_dispose(pci); @@ -2288,6 +2324,23 @@ static void libxl__device_pci_remove_common(libxl__egc *egc, libxl__ev_time_init(&prs->timeout); libxl__ev_time_init(&prs->retry_timer); + if (pci->name) { + libxl_pci_bdf *pcibdf = + libxl_device_pci_assignable_name2bdf(CTX, pci->name); + + if (!pcibdf) { + rc = ERROR_FAIL; + goto out; + } + + LOGD(DETAIL, domid, "'%s' -> %04x:%02x:%02x.%u", pci->name, + pcibdf->domain, pcibdf->bus, pcibdf->dev, pcibdf->func); + + libxl_pci_bdf_copy(CTX, &prs->pci.bdf, pcibdf); + libxl_pci_bdf_dispose(pcibdf); + free(pcibdf); + } + prs->orig_vdev = pci->vdevfn & ~7U; if ( pci->vfunc_mask == LIBXL_PCI_FUNC_ALL ) { @@ -2422,6 +2475,10 @@ static int libxl__device_pci_from_xs_be(libxl__gc *gc, } while ((p = strtok_r(NULL, ",=", &saveptr)) != NULL); } + s = libxl__xs_read(gc, XBT_NULL, GCSPRINTF("%s/name-%d", be_path, nr)); + if (s) + pci->name = strdup(s); + return 0; } diff --git a/tools/libs/light/libxl_types.idl b/tools/libs/light/libxl_types.idl index 2c441142fb..44bad36f1c 100644 --- a/tools/libs/light/libxl_types.idl +++ b/tools/libs/light/libxl_types.idl @@ -778,6 +778,7 @@ libxl_pci_bdf = Struct("pci_bdf", [ libxl_device_pci = Struct("device_pci", [ ("bdf", libxl_pci_bdf), + ("name", string), ("vdevfn", uint32), ("vfunc_mask", uint32), ("msitranslate", bool), diff --git a/tools/libs/util/libxlu_pci.c b/tools/libs/util/libxlu_pci.c index a8b6ce5427..543a1f80e9 100644 --- a/tools/libs/util/libxlu_pci.c +++ b/tools/libs/util/libxlu_pci.c @@ -151,6 +151,7 @@ int xlu_pci_parse_spec_string(XLU_Config *cfg, libxl_device_pci *pcidev, { const char *ptr = str; bool bdf_present = false; + bool name_present = false; int ret; /* Attempt to parse 'bdf' as positional parameter */ @@ -193,6 +194,10 @@ int xlu_pci_parse_spec_string(XLU_Config *cfg, libxl_device_pci *pcidev, pcidev->power_mgmt = atoi(val); } else if (!strcmp(key, "rdm_policy")) { ret = parse_rdm_policy(cfg, &pcidev->rdm_policy, val); + } else if (!strcmp(key, "name")) { + name_present = true; + pcidev->name = strdup(val); + if (!pcidev->name) ret = ERROR_NOMEM; } else { XLU__PCI_ERR(cfg, "Unknown PCI_SPEC_STRING option: %s", key); ret = ERROR_INVAL; @@ -205,7 +210,7 @@ int xlu_pci_parse_spec_string(XLU_Config *cfg, libxl_device_pci *pcidev, return ret; } - if (!bdf_present) + if (!(bdf_present ^ name_present)) return ERROR_INVAL; return 0;