{"id":2197408,"url":"http://patchwork.ozlabs.org/api/1.0/patches/2197408/?format=json","project":{"id":28,"url":"http://patchwork.ozlabs.org/api/1.0/projects/28/?format=json","name":"Linux PCI development","link_name":"linux-pci","list_id":"linux-pci.vger.kernel.org","list_email":"linux-pci@vger.kernel.org","web_url":null,"scm_url":null,"webscm_url":null},"msgid":"<20260217212707.2450423-19-cassel@kernel.org>","date":"2026-02-17T21:27:14","name":"[8/9] misc: pci_endpoint_test: Give reserved BARs a distinct error code","commit_ref":null,"pull_url":null,"state":"new","archived":false,"hash":"c8a1d62eec8c3ece2e86211dab8cd5cb25bce5be","submitter":{"id":87751,"url":"http://patchwork.ozlabs.org/api/1.0/people/87751/?format=json","name":"Niklas Cassel","email":"cassel@kernel.org"},"delegate":null,"mbox":"http://patchwork.ozlabs.org/project/linux-pci/patch/20260217212707.2450423-19-cassel@kernel.org/mbox/","series":[{"id":492482,"url":"http://patchwork.ozlabs.org/api/1.0/series/492482/?format=json","date":"2026-02-17T21:27:06","name":"PCI: endpoint differentiate between disabled and reserved BARs","version":1,"mbox":"http://patchwork.ozlabs.org/series/492482/mbox/"}],"check":"pending","checks":"http://patchwork.ozlabs.org/api/patches/2197408/checks/","tags":{},"headers":{"Return-Path":"\n ","X-Original-To":["incoming@patchwork.ozlabs.org","linux-pci@vger.kernel.org"],"Delivered-To":"patchwork-incoming@legolas.ozlabs.org","Authentication-Results":["legolas.ozlabs.org;\n\tdkim=pass (2048-bit key;\n unprotected) header.d=kernel.org header.i=@kernel.org header.a=rsa-sha256\n header.s=k20201202 header.b=rZ4ffOxP;\n\tdkim-atps=neutral","legolas.ozlabs.org;\n spf=pass (sender SPF authorized) smtp.mailfrom=vger.kernel.org\n (client-ip=2600:3c0a:e001:db::12fc:5321; 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a=rsa-sha256; c=relaxed/simple; d=kernel.org;\n\ts=k20201202; t=1771363696;\n\tbh=NFw+Agt03b1wTzK1P1urv9xzEn8ld88gw4xziKa1WBY=;\n\th=From:To:Cc:Subject:Date:In-Reply-To:References:From;\n\tb=rZ4ffOxPucN8jRimMOEFW7fiGcV+PT8nBplynLlwpSvQ05GFOV03LgYHtftPAosBA\n\t LkprqtRE6LuI4Lta85zAuYEgimDeKwFt/OpvPiiCR89Hx9mHm5QvYmK/dDy0knKtVG\n\t Tkbxr4xtV3YLrHPt1pyOzcwNYXk5nC2IyeiAddRX4BvqyItaOCXhTXdmWjM+rKQkpy\n\t 15f6jhnz/h92IvwNt3SYxdoeUPrfeJFSPHa94Yt7Ywdfde7tSutODuYJ/lkODnALSR\n\t gWpwB9xOiDlx4BWeYuZnRIE4KJTlD71YEWNzYxrSzswTcUFj/BB34QQrT6jsPiKpfU\n\t A/X/KEULKPALg==","From":"Niklas Cassel ","To":"Manivannan Sadhasivam , =?utf-8?q?Krzysztof_Wilczy?=\n\t=?utf-8?q?=C5=84ski?= ,\n Kishon Vijay Abraham I , Arnd Bergmann ,\n Greg Kroah-Hartman ","Cc":"Manikanta Maddireddy ,\n\tKoichiro Den ,\n\tDamien Le Moal ,\n\tNiklas Cassel ,\n\tlinux-pci@vger.kernel.org","Subject":"[PATCH 8/9] misc: pci_endpoint_test: Give reserved BARs a distinct\n error code","Date":"Tue, 17 Feb 2026 22:27:14 +0100","Message-ID":"<20260217212707.2450423-19-cassel@kernel.org>","X-Mailer":"git-send-email 2.53.0","In-Reply-To":"<20260217212707.2450423-11-cassel@kernel.org>","References":"<20260217212707.2450423-11-cassel@kernel.org>","Precedence":"bulk","X-Mailing-List":"linux-pci@vger.kernel.org","List-Id":"","List-Subscribe":"","List-Unsubscribe":"","MIME-Version":"1.0","X-Developer-Signature":"v=1; a=openpgp-sha256; l=2799; i=cassel@kernel.org;\n h=from:subject; bh=NFw+Agt03b1wTzK1P1urv9xzEn8ld88gw4xziKa1WBY=;\n b=owGbwMvMwCV2MsVw8cxjvkWMp9WSGDKn3DXw+uhUm8MQ+brz1bv8opueRn8mzLrn9C7w2MWNq\n Q0vl3Wu6yhlYRDjYpAVU2Tx/eGyv7jbfcpxxTs2MHNYmUCGMHBxCsBEjjxnZHiWGmnklnj0+qH8\n b18bHB5cfGQ6t3JPiGN5yjP79SYvcmczMvxucHNJ+7zC1FRtUpBYf8TdAM38lubf9/dmny1dcDJ\n uIwsA","X-Developer-Key":"i=cassel@kernel.org; a=openpgp;\n fpr=5ADE635C0E631CBBD5BE065A352FE6582ED9B5DA","Content-Transfer-Encoding":"8bit"},"content":"Give reserved BARs a distinct error code, such that the pci_endpoint_test\nselftest will be able to skip test cases that are run against reserved\nBARs.\n\nSigned-off-by: Niklas Cassel \n---\n drivers/misc/pci_endpoint_test.c | 32 ++++++++++++++++++++++++++++++--\n 1 file changed, 30 insertions(+), 2 deletions(-)","diff":"diff --git a/drivers/misc/pci_endpoint_test.c b/drivers/misc/pci_endpoint_test.c\nindex 74ab5b5b9011..7cffb6e77c4d 100644\n--- a/drivers/misc/pci_endpoint_test.c\n+++ b/drivers/misc/pci_endpoint_test.c\n@@ -84,6 +84,12 @@\n #define CAP_MSIX\t\t\t\tBIT(2)\n #define CAP_INTX\t\t\t\tBIT(3)\n #define CAP_SUBRANGE_MAPPING\t\t\tBIT(4)\n+#define CAP_BAR0_RESERVED\t\t\tBIT(5)\n+#define CAP_BAR1_RESERVED\t\t\tBIT(6)\n+#define CAP_BAR2_RESERVED\t\t\tBIT(7)\n+#define CAP_BAR3_RESERVED\t\t\tBIT(8)\n+#define CAP_BAR4_RESERVED\t\t\tBIT(9)\n+#define CAP_BAR5_RESERVED\t\t\tBIT(10)\n \n #define PCI_ENDPOINT_TEST_DB_BAR\t\t0x34\n #define PCI_ENDPOINT_TEST_DB_OFFSET\t\t0x38\n@@ -275,6 +281,23 @@ static int pci_endpoint_test_request_irq(struct pci_endpoint_test *test)\n \treturn ret;\n }\n \n+static bool bar_is_reserved(struct pci_endpoint_test *test, enum pci_barno bar)\n+{\n+\tif (bar == BAR_0 && test->ep_caps & CAP_BAR0_RESERVED)\n+\t\treturn true;\n+\telse if (bar == BAR_1 && test->ep_caps & CAP_BAR1_RESERVED)\n+\t\treturn true;\n+\telse if (bar == BAR_2 && test->ep_caps & CAP_BAR2_RESERVED)\n+\t\treturn true;\n+\telse if (bar == BAR_3 && test->ep_caps & CAP_BAR3_RESERVED)\n+\t\treturn true;\n+\telse if (bar == BAR_4 && test->ep_caps & CAP_BAR4_RESERVED)\n+\t\treturn true;\n+\telse if (bar == BAR_5 && test->ep_caps & CAP_BAR5_RESERVED)\n+\t\treturn true;\n+\treturn false;\n+}\n+\n static const u32 bar_test_pattern[] = {\n \t0xA0A0A0A0,\n \t0xA1A1A1A1,\n@@ -403,7 +426,7 @@ static int pci_endpoint_test_bars(struct pci_endpoint_test *test)\n \n \t/* Write all BARs in order (without reading). */\n \tfor (bar = 0; bar < PCI_STD_NUM_BARS; bar++)\n-\t\tif (test->bar[bar])\n+\t\tif (test->bar[bar] && !bar_is_reserved(test, bar))\n \t\t\tpci_endpoint_test_bars_write_bar(test, bar);\n \n \t/*\n@@ -413,7 +436,7 @@ static int pci_endpoint_test_bars(struct pci_endpoint_test *test)\n \t * (Reading back the BAR directly after writing can not detect this.)\n \t */\n \tfor (bar = 0; bar < PCI_STD_NUM_BARS; bar++) {\n-\t\tif (test->bar[bar]) {\n+\t\tif (test->bar[bar] && !bar_is_reserved(test, bar)) {\n \t\t\tret = pci_endpoint_test_bars_read_bar(test, bar);\n \t\t\tif (ret)\n \t\t\t\treturn ret;\n@@ -1139,6 +1162,11 @@ static long pci_endpoint_test_ioctl(struct file *file, unsigned int cmd,\n \t\tif (is_am654_pci_dev(pdev) && bar == BAR_0)\n \t\t\tgoto ret;\n \n+\t\tif (bar_is_reserved(test, bar)) {\n+\t\t\tret = -ENOBUFS;\n+\t\t\tgoto ret;\n+\t\t}\n+\n \t\tif (cmd == PCITEST_BAR)\n \t\t\tret = pci_endpoint_test_bar(test, bar);\n \t\telse\n","prefixes":["8/9"]}