diff options
Diffstat (limited to 'tools/testing/selftests/arm64/signal')
4 files changed, 117 insertions, 25 deletions
diff --git a/tools/testing/selftests/arm64/signal/.gitignore b/tools/testing/selftests/arm64/signal/.gitignore index 1ce5b5eac386..b2f2bfd5c6aa 100644 --- a/tools/testing/selftests/arm64/signal/.gitignore +++ b/tools/testing/selftests/arm64/signal/.gitignore @@ -2,6 +2,7 @@ mangle_* fake_sigreturn_* fpmr_* +poe_* sme_* ssve_* sve_* 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..36bd9940ee05 --- /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 <signal.h> +#include <ucontext.h> +#include <sys/auxv.h> +#include <sys/prctl.h> +#include <unistd.h> +#include <asm/sigcontext.h> + +#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) + : + : ); + + 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, +}; diff --git a/tools/testing/selftests/arm64/signal/testcases/testcases.c b/tools/testing/selftests/arm64/signal/testcases/testcases.c index 674b88cc8c39..e6daa94fcd2e 100644 --- a/tools/testing/selftests/arm64/signal/testcases/testcases.c +++ b/tools/testing/selftests/arm64/signal/testcases/testcases.c @@ -6,29 +6,6 @@ #include "testcases.h" -struct _aarch64_ctx *get_header(struct _aarch64_ctx *head, uint32_t magic, - size_t resv_sz, size_t *offset) -{ - size_t offs = 0; - struct _aarch64_ctx *found = NULL; - - if (!head || resv_sz < HDR_SZ) - return found; - - while (offs <= resv_sz - HDR_SZ && - head->magic != magic && head->magic) { - offs += head->size; - head = GET_RESV_NEXT_HEAD(head); - } - if (head->magic == magic) { - found = head; - if (offset) - *offset = offs; - } - - return found; -} - bool validate_extra_context(struct extra_context *extra, char **err, void **extra_data, size_t *extra_size) { @@ -184,6 +161,10 @@ bool validate_reserved(ucontext_t *uc, size_t resv_sz, char **err) if (head->size != sizeof(struct esr_context)) *err = "Bad size for esr_context"; break; + case POE_MAGIC: + if (head->size != sizeof(struct poe_context)) + *err = "Bad size for poe_context"; + break; case TPIDR2_MAGIC: if (head->size != sizeof(struct tpidr2_context)) *err = "Bad size for tpidr2_context"; diff --git a/tools/testing/selftests/arm64/signal/testcases/testcases.h b/tools/testing/selftests/arm64/signal/testcases/testcases.h index 7727126347e0..9872b8912714 100644 --- a/tools/testing/selftests/arm64/signal/testcases/testcases.h +++ b/tools/testing/selftests/arm64/signal/testcases/testcases.h @@ -26,6 +26,9 @@ #define HDR_SZ \ sizeof(struct _aarch64_ctx) +#define GET_UC_RESV_HEAD(uc) \ + (struct _aarch64_ctx *)(&(uc->uc_mcontext.__reserved)) + #define GET_SF_RESV_HEAD(sf) \ (struct _aarch64_ctx *)(&(sf).uc.uc_mcontext.__reserved) @@ -88,8 +91,29 @@ struct fake_sigframe { bool validate_reserved(ucontext_t *uc, size_t resv_sz, char **err); -struct _aarch64_ctx *get_header(struct _aarch64_ctx *head, uint32_t magic, - size_t resv_sz, size_t *offset); +static inline struct _aarch64_ctx *get_header(struct _aarch64_ctx *head, uint32_t magic, + size_t resv_sz, size_t *offset) +{ + size_t offs = 0; + struct _aarch64_ctx *found = NULL; + + if (!head || resv_sz < HDR_SZ) + return found; + + while (offs <= resv_sz - HDR_SZ && + head->magic != magic && head->magic) { + offs += head->size; + head = GET_RESV_NEXT_HEAD(head); + } + if (head->magic == magic) { + found = head; + if (offset) + *offset = offs; + } + + return found; +} + static inline struct _aarch64_ctx *get_terminator(struct _aarch64_ctx *head, size_t resv_sz, |