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Fri, 27 Oct 2023 11:09:58 -0700 (PDT) From: Joey Gouly To: linux-arm-kernel@lists.infradead.org Cc: akpm@linux-foundation.org, aneesh.kumar@linux.ibm.com, broonie@kernel.org, catalin.marinas@arm.com, dave.hansen@linux.intel.com, joey.gouly@arm.com, maz@kernel.org, oliver.upton@linux.dev, shuah@kernel.org, will@kernel.org, kvmarm@lists.linux.dev, linux-fsdevel@vger.kernel.org, linux-mm@kvack.org, linux-kselftest@vger.kernel.org, James Morse , Suzuki K Poulose , Zenghui Yu Subject: [PATCH v2 23/24] kselftest/arm64: Add test case for POR_EL0 signal frame records Date: Fri, 27 Oct 2023 19:08:49 +0100 Message-Id: <20231027180850.1068089-24-joey.gouly@arm.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20231027180850.1068089-1-joey.gouly@arm.com> References: <20231027180850.1068089-1-joey.gouly@arm.com> MIME-Version: 1.0 X-Rspam-User: X-Rspamd-Server: rspam12 X-Rspamd-Queue-Id: 022C140018 X-Stat-Signature: 1zu9wu3qmst7m4tbg4rsy4j65fuy7hhs X-HE-Tag: 1698430200-798539 X-HE-Meta: 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 Q7H28jGO RRPCauUxVVcNFp8xJAUbUofcrnCWJwSY1kgk5v63Ouk5amjry3vnCX0nFGyzyRb+Oga1Lx840auRWk1CU9LGKjkuL3jd6nfmlC7zdDU5GBwwxmceKv4mkN+E0Coc0rQH034OiWRmHqZXd5gXvzhyLrD+q3/W546ERzd2abMglVMfapEQeRY2wLQu/zjQjOwuRrPqzP+/IrKMFDtki0u8+Ail84oBKCyebIsOmxiwhTAtHSTtXvG2NTYCIUv2pIfA/lGzD5fufQUZ0Y1U= X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: List-Subscribe: List-Unsubscribe: Ensure that we get signal context for POR_EL0 if and only if POE is present on the system. Copied from the TPIDR2 test. Signed-off-by: Joey Gouly Cc: Catalin Marinas Cc: Will Deacon Cc: Mark Brown Cc: Shuah Khan --- .../testing/selftests/arm64/signal/.gitignore | 1 + .../arm64/signal/testcases/poe_siginfo.c | 86 +++++++++++++++++++ 2 files changed, 87 insertions(+) create mode 100644 tools/testing/selftests/arm64/signal/testcases/poe_siginfo.c diff --git a/tools/testing/selftests/arm64/signal/.gitignore b/tools/testing/selftests/arm64/signal/.gitignore index 839e3a252629..6bcb27bd506b 100644 --- a/tools/testing/selftests/arm64/signal/.gitignore +++ b/tools/testing/selftests/arm64/signal/.gitignore @@ -5,6 +5,7 @@ sme_* ssve_* sve_* tpidr2_* +poe_siginfo za_* zt_* !*.[ch] diff --git a/tools/testing/selftests/arm64/signal/testcases/poe_siginfo.c b/tools/testing/selftests/arm64/signal/testcases/poe_siginfo.c new file mode 100644 index 000000000000..d890029304c4 --- /dev/null +++ b/tools/testing/selftests/arm64/signal/testcases/poe_siginfo.c @@ -0,0 +1,86 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * Copyright (C) 2023 Arm Limited + * + * Verify that the POR_EL0 register context in signal frames is set up as + * expected. + */ + +#include +#include +#include +#include +#include +#include + +#include "test_signals_utils.h" +#include "testcases.h" + +static union { + ucontext_t uc; + char buf[1024 * 128]; +} context; + +#define SYS_POR_EL0 "S3_3_C10_C2_4" + +static uint64_t get_por_el0(void) +{ + uint64_t val; + + asm volatile ( + "mrs %0, " SYS_POR_EL0 "\n" + : "=r"(val) + : + : "cc"); + + return val; +} + +int poe_present(struct tdescr *td, siginfo_t *si, ucontext_t *uc) +{ + struct _aarch64_ctx *head = GET_BUF_RESV_HEAD(context); + struct poe_context *poe_ctx; + size_t offset; + bool in_sigframe; + bool have_poe; + __u64 orig_poe; + + have_poe = getauxval(AT_HWCAP2) & HWCAP2_POE; + if (have_poe) + orig_poe = get_por_el0(); + + if (!get_current_context(td, &context.uc, sizeof(context))) + return 1; + + poe_ctx = (struct poe_context *) + get_header(head, POE_MAGIC, td->live_sz, &offset); + + in_sigframe = poe_ctx != NULL; + + fprintf(stderr, "POR_EL0 sigframe %s on system %s POE\n", + in_sigframe ? "present" : "absent", + have_poe ? "with" : "without"); + + td->pass = (in_sigframe == have_poe); + + /* + * Check that the value we read back was the one present at + * the time that the signal was triggered. + */ + if (have_poe && poe_ctx) { + if (poe_ctx->por_el0 != orig_poe) { + fprintf(stderr, "POR_EL0 in frame is %llx, was %llx\n", + poe_ctx->por_el0, orig_poe); + td->pass = false; + } + } + + return 0; +} + +struct tdescr tde = { + .name = "POR_EL0", + .descr = "Validate that POR_EL0 is present as expected", + .timeout = 3, + .run = poe_present, +};