// SPDX-License-Identifier: GPL-2.0 /* * Copyright (C) 2021 ARM Limited * * Verify that using an instruction not supported in streaming mode * traps when in streaming mode. */ #include <signal.h> #include <ucontext.h> #include <sys/prctl.h> #include "test_signals_utils.h" #include "testcases.h" static union { ucontext_t uc; char buf[1024 * 128]; } context; static void enable_za(void) { /* smstart za; real data is TODO */ asm volatile(".inst 0xd503457f" : : : ); } int zt_regs_run(struct tdescr *td, siginfo_t *si, ucontext_t *uc) { size_t offset; struct _aarch64_ctx *head = GET_BUF_RESV_HEAD(context); struct zt_context *zt; char *zeros; /* * Get a signal context which should have a ZT frame and registers * in it. */ enable_za(); if (!get_current_context(td, &context.uc, sizeof(context))) return 1; head = get_header(head, ZT_MAGIC, GET_BUF_RESV_SIZE(context), &offset); if (!head) { fprintf(stderr, "No ZT context\n"); return 1; } zt = (struct zt_context *)head; if (zt->nregs == 0) { fprintf(stderr, "Got context with no registers\n"); return 1; } fprintf(stderr, "Got expected size %u for %d registers\n", head->size, zt->nregs); /* We didn't load any data into ZT so it should be all zeros */ zeros = malloc(ZT_SIG_REGS_SIZE(zt->nregs)); if (!zeros) { fprintf(stderr, "Out of memory, nregs=%u\n", zt->nregs); return 1; } memset(zeros, 0, ZT_SIG_REGS_SIZE(zt->nregs)); if (memcmp(zeros, (char *)zt + ZT_SIG_REGS_OFFSET, ZT_SIG_REGS_SIZE(zt->nregs)) != 0) { fprintf(stderr, "ZT data invalid\n"); free(zeros); return 1; } free(zeros); td->pass = 1; return 0; } struct tdescr tde = { .name = "ZT register data", .descr = "Validate that ZT is present and has data when ZA is enabled", .feats_required = FEAT_SME2, .timeout = 3, .sanity_disabled = true, .run = zt_regs_run, };