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Fri, 18 Sep 2026 05:23:48 +0000 (GMT) Received: from li-d12addcc-2792-11b2-a85c-bd8df30615ab.ibm.com.com (unknown [9.66.68.7]) by smtpav07.fra02v.mail.ibm.com (Postfix) with ESMTP; Fri, 18 Sep 2026 05:23:47 +0000 (GMT) From: Shirisha G To: linuxppc-dev@lists.ozlabs.org Cc: linux-kselftest@vger.kernel.org, maddy@linux.ibm.com, venkat88@linux.ibm.com, shirisha@linux.ibm.com Subject: [PATCH 5/7] Subject: [PATCH] selftests/powerpc: Add RTAS firmware flash interface test Date: Fri, 18 Sep 2026 10:52:40 +0530 Message-ID: <20260918052321.932660-5-shirisha@linux.ibm.com> X-Mailer: git-send-email 2.55.0 In-Reply-To: <20260918052321.932660-1-shirisha@linux.ibm.com> References: <20260918052321.932660-1-shirisha@linux.ibm.com> Precedence: bulk X-Mailing-List: linux-kselftest@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-TM-AS-GCONF: 00 X-Proofpoint-Spam-Details-Enc: AW1haW4tMjYwOTE4MDA2NCBTYWx0ZWRfX7PrjU1Qp9LBs Ug+/p/lqJ/x7g6zXFBUMiCQG6+Fm5yU8M275Cy+aYhgOrAZJyh/mLEYkgPtl0fvbVOEVbjx8t7/ Q83yFGXeTyvyi7mKf6dDdOV9l6Etq31KSn3YUvHeRHMaOonG/gb8d5m/DKPbv7Jf3Rx8xmiWOV8 fbKOQ75Cv3UDBT0OoO3CRjv/ZokrRuzPCSgHOlqwbQgBjpB7bYrUwudj+cWc3wDzyhtU7g8TD9z k35uqGKR/t/8OVIIcwOttkupJxjt8CXZcKU0Mo0fju2fVfsqTUuUgcJhIfYeiFABchX0GX5Gk1m /TMy9L3Ud0DzUksHHwSMw/pikH/sbrPRBToza5+QFCHt8dsXJeRkvEDINzR+k+qzWvQPNwEeWXw JBtdf7AkUV1IucNnY4m8kpCEZAmqlVVDIjsdJKwxTYqcha5iYXwO/4ezhhXZuaEdwXKOw4sFYPT gaqh1jUJK0ICd+FX4Fg== X-Proofpoint-GUID: 62fWhhARS6-jJDViNQBb_xr0M6QjaA2z X-Authority-Analysis: v=2.4 cv=DobDa2/+ c=1 sm=1 tr=0 ts=6aaccaed cx=c_pps a=5BHTudwdYE3Te8bg5FgnPg==:117 a=5BHTudwdYE3Te8bg5FgnPg==:17 a=VdqzKS8jKosA:10 a=VkNPw1HP01LnGYTKEx00:22 a=RnoormkPH1_aCDwRdu11:22 a=uAbxVGIbfxUO_5tXvNgY:22 a=VnNF1IyMAAAA:8 a=xJTyo2tlqj3zewc7kv4A:9 X-Proofpoint-ORIG-GUID: 62fWhhARS6-jJDViNQBb_xr0M6QjaA2z X-Proofpoint-Spam-Info: AW1haW4tMjYwOTE4MDA2NCBTYWx0ZWRfX2qqpI1i14U5c +wyxWEEEoVE0dceLD6mzTlM3KfhLyNPihRJMk36sGIh5p+P0WeniXUHgO8OXtKo9MhINq4TXKdO ajhPpyYQxU6/GoNaJRLqnhvd21A59nE= X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.293,Aquarius:18.0.1176,Hydra:6.1.134,FMLib:17.12.100.49 definitions=2026-09-18_01,2026-09-16_02,2025-10-01_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 phishscore=0 malwarescore=0 priorityscore=1501 suspectscore=0 impostorscore=0 spamscore=0 clxscore=1015 adultscore=0 bulkscore=0 lowpriorityscore=0 classifier=typeunknown authscore=0 authtc= authcc= route=outbound adjust=0 reason=mlx scancount=1 engine=8.22.0-2609040000 definitions=main-2609180064 Add kselftest for the RTAS firmware flash interface on pseries/PowerVM systems. This test validates the existence and accessibility of the firmware flash and update proc entries, while safely rejecting invalid data. It does not perform actual firmware updates. The test verifies: - Existence of `/proc/ppc64/rtas/firmware_flash` interface - Ability to open and read the flash interface - Rejection of invalid image writes (requires root) - Accessibility of `/proc/ppc64/rtas/firmware_update` status - Safe validation subset without triggering real updates Signed-off-by: Shirisha G --- .../selftests/powerpc/rtas/rtas_flash_test.c | 75 +++++++++++++++++++ 1 file changed, 75 insertions(+) create mode 100644 tools/testing/selftests/powerpc/rtas/rtas_flash_test.c diff --git a/tools/testing/selftests/powerpc/rtas/rtas_flash_test.c b/tools/testing/selftests/powerpc/rtas/rtas_flash_test.c new file mode 100644 index 000000000000..7f7c90447e9c --- /dev/null +++ b/tools/testing/selftests/powerpc/rtas/rtas_flash_test.c @@ -0,0 +1,75 @@ +// SPDX-License-Identifier: GPL-2.0-only +/* + * RTAS Firmware Flash Test (Safe Subset) + * Copyright (C) 2026 IBM Corporation + * + * WARNING: This test only validates the interface with invalid data. + * It does NOT perform actual firmware updates. + */ + +#include +#include +#include +#include +#include +#include +#include "utils.h" + +#define FLASH_PROC "/proc/ppc64/rtas/firmware_flash" +#define UPDATE_PROC "/proc/ppc64/rtas/firmware_update" + +int main(void) +{ + int fd; + char invalid_data[256]; + ssize_t ret; + + test_harness_set_timeout(10); + + /* Test 1: Verify flash interface exists */ + SKIP_IF(access(FLASH_PROC, F_OK) != 0); + + /* Test 2: Verify we can open the interface */ + fd = open(FLASH_PROC, O_RDONLY); + if (fd >= 0) { + close(fd); + printf("Flash interface is readable\n"); + } + + /* Test 3: Test invalid image rejection (requires root) */ + if (geteuid() == 0) { + fd = open(FLASH_PROC, O_WRONLY); + if (fd >= 0) { + /* Write invalid data - should be rejected */ + memset(invalid_data, 0xFF, sizeof(invalid_data)); + ret = write(fd, invalid_data, sizeof(invalid_data)); + + /* We expect this to fail or be rejected */ + if (ret < 0) { + printf("Invalid image correctly rejected (errno=%d)\n", errno); + } else { + printf("WARNING: Write accepted (may need validation)\n"); + } + close(fd); + } + } else { + printf("Skipping write test (requires root)\n"); + } + + /* Test 4: Check update status interface */ + if (access(UPDATE_PROC, R_OK) == 0) { + fd = open(UPDATE_PROC, O_RDONLY); + if (fd >= 0) { + char status[256]; + ret = read(fd, status, sizeof(status) - 1); + if (ret > 0) { + status[ret] = '\0'; + printf("Update status: %s\n", status); + } + close(fd); + } + } + + printf("RTAS flash test passed (safe subset)\n"); + return 0; +} -- 2.43.5