// SPDX-License-Identifier: GPL-2.0 /* * Copyright (C) 2021 ARM Limited * * Verify that the SVE register context in signal frames is set up as * expected. */ #include #include #include #include #include "test_signals_utils.h" #include "sve_helpers.h" #include "testcases.h" static union { ucontext_t uc; char buf[1024 * 64]; } context; static bool sve_get_vls(struct tdescr *td) { int res = sve_fill_vls(VLS_USE_SVE, 1); if (!res) return true; if (res == KSFT_SKIP) td->result = KSFT_SKIP; return false; } static void setup_sve_regs(void) { /* RDVL x16, #1 so we should have SVE regs; real data is TODO */ asm volatile(".inst 0x04bf5030" : : : "x16" ); } static int do_one_sve_vl(struct tdescr *td, siginfo_t *si, ucontext_t *uc, unsigned int vl) { size_t offset; struct _aarch64_ctx *head = GET_BUF_RESV_HEAD(context); struct sve_context *sve; fprintf(stderr, "Testing VL %d\n", vl); if (prctl(PR_SVE_SET_VL, vl) == -1) { fprintf(stderr, "Failed to set VL\n"); return 1; } /* * Get a signal context which should have a SVE frame and registers * in it. */ setup_sve_regs(); if (!get_current_context(td, &context.uc, sizeof(context))) return 1; head = get_header(head, SVE_MAGIC, GET_BUF_RESV_SIZE(context), &offset); if (!head) { fprintf(stderr, "No SVE context\n"); return 1; } sve = (struct sve_context *)head; if (sve->vl != vl) { fprintf(stderr, "Got VL %d, expected %d\n", sve->vl, vl); return 1; } /* The actual size validation is done in get_current_context() */ fprintf(stderr, "Got expected size %u and VL %d\n", head->size, sve->vl); return 0; } static int sve_regs(struct tdescr *td, siginfo_t *si, ucontext_t *uc) { int i; for (i = 0; i < nvls; i++) { if (do_one_sve_vl(td, si, uc, vls[i])) return 1; } td->pass = 1; return 0; } struct tdescr tde = { .name = "SVE registers", .descr = "Check that we get the right SVE registers reported", .feats_required = FEAT_SVE, .timeout = 3, .init = sve_get_vls, .run = sve_regs, };