@@ -1,5 +1,8 @@
# SPDX-License-Identifier: GPL-2.0-only
mangle_*
fake_sigreturn_*
+sme_*
+ssve_*
sve_*
+za_*
!*.[ch]
@@ -34,11 +34,15 @@
enum {
FSSBS_BIT,
FSVE_BIT,
+ FSME_BIT,
+ FSME_FA64_BIT,
FMAX_END
};
#define FEAT_SSBS (1UL << FSSBS_BIT)
#define FEAT_SVE (1UL << FSVE_BIT)
+#define FEAT_SME (1UL << FSME_BIT)
+#define FEAT_SME_FA64 (1UL << FSME_FA64_BIT)
/*
* A descriptor used to describe and configure a test case.
@@ -27,6 +27,8 @@ static int sig_copyctx = SIGTRAP;
static char const *const feats_names[FMAX_END] = {
" SSBS ",
" SVE ",
+ " SME ",
+ " FA64 ",
};
#define MAX_FEATS_SZ 128
@@ -268,6 +270,10 @@ int test_init(struct tdescr *td)
td->feats_supported |= FEAT_SSBS;
if (getauxval(AT_HWCAP) & HWCAP_SVE)
td->feats_supported |= FEAT_SVE;
+ if (getauxval(AT_HWCAP2) & HWCAP2_SME)
+ td->feats_supported |= FEAT_SME;
+ if (getauxval(AT_HWCAP2) & HWCAP2_SME_FA64)
+ td->feats_supported |= FEAT_SME_FA64;
if (feats_ok(td)) {
if (td->feats_required & td->feats_supported)
fprintf(stderr,
new file mode 100644
@@ -0,0 +1,92 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Copyright (C) 2021 ARM Limited
+ *
+ * Attempt to change the streaming SVE vector length in a signal
+ * handler, this is not supported and is expected to segfault.
+ */
+
+#include <signal.h>
+#include <ucontext.h>
+#include <sys/prctl.h>
+
+#include "test_signals_utils.h"
+#include "testcases.h"
+
+struct fake_sigframe sf;
+static unsigned int vls[SVE_VQ_MAX];
+unsigned int nvls = 0;
+
+static bool sme_get_vls(struct tdescr *td)
+{
+ int vq, vl;
+
+ /*
+ * Enumerate up to SVE_VQ_MAX vector lengths
+ */
+ for (vq = SVE_VQ_MAX; vq > 0; --vq) {
+ vl = prctl(PR_SVE_SET_VL, vq * 16);
+ if (vl == -1)
+ return false;
+
+ vl &= PR_SME_VL_LEN_MASK;
+
+ /* Skip missing VLs */
+ vq = sve_vq_from_vl(vl);
+
+ vls[nvls++] = vl;
+ }
+
+ /* We need at least two VLs */
+ if (nvls < 2) {
+ fprintf(stderr, "Only %d VL supported\n", nvls);
+ return false;
+ }
+
+ return true;
+}
+
+static int fake_sigreturn_ssve_change_vl(struct tdescr *td,
+ siginfo_t *si, ucontext_t *uc)
+{
+ size_t resv_sz, offset;
+ struct _aarch64_ctx *head = GET_SF_RESV_HEAD(sf);
+ struct sve_context *sve;
+
+ /* Get a signal context with a SME ZA frame in it */
+ if (!get_current_context(td, &sf.uc))
+ return 1;
+
+ resv_sz = GET_SF_RESV_SIZE(sf);
+ head = get_header(head, SVE_MAGIC, resv_sz, &offset);
+ if (!head) {
+ fprintf(stderr, "No SVE context\n");
+ return 1;
+ }
+
+ if (head->size != sizeof(struct sve_context)) {
+ fprintf(stderr, "Register data present, aborting\n");
+ return 1;
+ }
+
+ sve = (struct sve_context *)head;
+
+ /* No changes are supported; init left us at minimum VL so go to max */
+ fprintf(stderr, "Attempting to change VL from %d to %d\n",
+ sve->vl, vls[0]);
+ sve->vl = vls[0];
+
+ fake_sigreturn(&sf, sizeof(sf), 0);
+
+ return 1;
+}
+
+struct tdescr tde = {
+ .name = "FAKE_SIGRETURN_SSVE_CHANGE",
+ .descr = "Attempt to change Streaming SVE VL",
+ .feats_required = FEAT_SME,
+ .sig_ok = SIGSEGV,
+ .timeout = 3,
+ .init = sme_get_vls,
+ .run = fake_sigreturn_ssve_change_vl,
+};
new file mode 100644
@@ -0,0 +1,38 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Copyright (C) 2021 ARM Limited
+ *
+ * Verify that using a streaming mode instruction without enabling it
+ * generates a SIGILL.
+ */
+
+#include <signal.h>
+#include <ucontext.h>
+#include <sys/prctl.h>
+
+#include "test_signals_utils.h"
+#include "testcases.h"
+
+int sme_trap_no_sm_trigger(struct tdescr *td)
+{
+ /* SMSTART ZA ; ADDHA ZA0.S, P0/M, P0/M, Z0.S */
+ asm volatile(".inst 0xd503457f ; .inst 0xc0900000");
+
+ return 0;
+}
+
+int sme_trap_no_sm_run(struct tdescr *td, siginfo_t *si, ucontext_t *uc)
+{
+ return 1;
+}
+
+struct tdescr tde = {
+ .name = "SME trap without SM",
+ .descr = "Check that we get a SIGILL if we use streaming mode without enabling it",
+ .timeout = 3,
+ .feats_required = FEAT_SME, /* We need a SMSTART ZA */
+ .sanity_disabled = true,
+ .trigger = sme_trap_no_sm_trigger,
+ .run = sme_trap_no_sm_run,
+ .sig_ok = SIGILL,
+};
new file mode 100644
@@ -0,0 +1,45 @@
+// 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"
+
+int sme_trap_non_streaming_trigger(struct tdescr *td)
+{
+ /*
+ * The framework will handle SIGILL so we need to exit SM to
+ * stop any other code triggering a further SIGILL down the
+ * line from using a streaming-illegal instruction.
+ */
+ asm volatile(".inst 0xd503437f; /* SMSTART ZA */ \
+ cnt v0.16b, v0.16b; \
+ .inst 0xd503447f /* SMSTOP ZA */");
+
+ return 0;
+}
+
+int sme_trap_non_streaming_run(struct tdescr *td, siginfo_t *si, ucontext_t *uc)
+{
+ return 1;
+}
+
+struct tdescr tde = {
+ .name = "SME SM trap unsupported instruction",
+ .descr = "Check that we get a SIGILL if we use an unsupported instruction in streaming mode",
+ .feats_required = FEAT_SME,
+ .feats_incompatible = FEAT_SME_FA64,
+ .timeout = 3,
+ .sanity_disabled = true,
+ .trigger = sme_trap_non_streaming_trigger,
+ .run = sme_trap_non_streaming_run,
+ .sig_ok = SIGILL,
+};
new file mode 100644
@@ -0,0 +1,36 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Copyright (C) 2021 ARM Limited
+ *
+ * Verify that accessing ZA without enabling it generates a SIGILL.
+ */
+
+#include <signal.h>
+#include <ucontext.h>
+#include <sys/prctl.h>
+
+#include "test_signals_utils.h"
+#include "testcases.h"
+
+int sme_trap_za_trigger(struct tdescr *td)
+{
+ /* ZERO ZA */
+ asm volatile(".inst 0xc00800ff");
+
+ return 0;
+}
+
+int sme_trap_za_run(struct tdescr *td, siginfo_t *si, ucontext_t *uc)
+{
+ return 1;
+}
+
+struct tdescr tde = {
+ .name = "SME ZA trap",
+ .descr = "Check that we get a SIGILL if we access ZA without enabling",
+ .timeout = 3,
+ .sanity_disabled = true,
+ .trigger = sme_trap_za_trigger,
+ .run = sme_trap_za_run,
+ .sig_ok = SIGILL,
+};
new file mode 100644
@@ -0,0 +1,68 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Copyright (C) 2021 ARM Limited
+ *
+ * Check that the SME vector length reported in signal contexts is the
+ * expected one.
+ */
+
+#include <signal.h>
+#include <ucontext.h>
+#include <sys/prctl.h>
+
+#include "test_signals_utils.h"
+#include "testcases.h"
+
+struct fake_sigframe sf;
+unsigned int vl;
+
+static bool get_sme_vl(struct tdescr *td)
+{
+ int ret = prctl(PR_SME_GET_VL);
+ if (ret == -1)
+ return false;
+
+ vl = ret;
+
+ return true;
+}
+
+static int sme_vl(struct tdescr *td, siginfo_t *si, ucontext_t *uc)
+{
+ size_t resv_sz, offset;
+ struct _aarch64_ctx *head = GET_SF_RESV_HEAD(sf);
+ struct za_context *za;
+
+ /* Get a signal context which should have a ZA frame in it */
+ if (!get_current_context(td, &sf.uc))
+ return 1;
+
+ resv_sz = GET_SF_RESV_SIZE(sf);
+ head = get_header(head, ZA_MAGIC, resv_sz, &offset);
+ if (!head) {
+ fprintf(stderr, "No ZA context\n");
+ return 1;
+ }
+ za = (struct za_context *)head;
+
+ if (za->vl != vl) {
+ fprintf(stderr, "ZA sigframe VL %u, expected %u\n",
+ za->vl, vl);
+ return 1;
+ } else {
+ fprintf(stderr, "got expected VL %u\n", vl);
+ }
+
+ td->pass = 1;
+
+ return 0;
+}
+
+struct tdescr tde = {
+ .name = "SME VL",
+ .descr = "Check that we get the right SME VL reported",
+ .feats_required = FEAT_SME,
+ .timeout = 3,
+ .init = get_sme_vl,
+ .run = sme_vl,
+};
new file mode 100644
@@ -0,0 +1,135 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Copyright (C) 2021 ARM Limited
+ *
+ * Verify that the streaming SVE register context in signal frames is
+ * set up as expected.
+ */
+
+#include <signal.h>
+#include <ucontext.h>
+#include <sys/prctl.h>
+
+#include "test_signals_utils.h"
+#include "testcases.h"
+
+struct fake_sigframe sf;
+static unsigned int vls[SVE_VQ_MAX];
+unsigned int nvls = 0;
+
+static bool sme_get_vls(struct tdescr *td)
+{
+ int vq, vl;
+
+ /*
+ * Enumerate up to SVE_VQ_MAX vector lengths
+ */
+ for (vq = SVE_VQ_MAX; vq > 0; --vq) {
+ vl = prctl(PR_SME_SET_VL, vq * 16);
+ if (vl == -1)
+ return false;
+
+ vl &= PR_SME_VL_LEN_MASK;
+
+ /* Skip missing VLs */
+ vq = sve_vq_from_vl(vl);
+
+ vls[nvls++] = vl;
+ }
+
+ /* We need at least one VL */
+ if (nvls < 1) {
+ fprintf(stderr, "Only %d VL supported\n", nvls);
+ return false;
+ }
+
+ return true;
+}
+
+static void setup_ssve_regs(void)
+{
+ /* smstart sm; real data is TODO */
+ asm volatile(".inst 0xd503437f" : : : );
+}
+
+static int do_one_sme_vl(struct tdescr *td, siginfo_t *si, ucontext_t *uc,
+ unsigned int vl)
+{
+ size_t resv_sz, offset;
+ struct _aarch64_ctx *head = GET_SF_RESV_HEAD(sf);
+ struct sve_context *ssve;
+ int ret;
+
+ fprintf(stderr, "Testing VL %d\n", vl);
+
+ ret = prctl(PR_SME_SET_VL, vl);
+ if (ret != vl) {
+ fprintf(stderr, "Failed to set VL, got %d\n", ret);
+ return 1;
+ }
+
+ /*
+ * Get a signal context which should have a SVE frame and registers
+ * in it.
+ */
+ setup_ssve_regs();
+ if (!get_current_context(td, &sf.uc))
+ return 1;
+
+ resv_sz = GET_SF_RESV_SIZE(sf);
+ head = get_header(head, SVE_MAGIC, resv_sz, &offset);
+ if (!head) {
+ fprintf(stderr, "No SVE context\n");
+ return 1;
+ }
+
+ ssve = (struct sve_context *)head;
+ if (ssve->vl != vl) {
+ fprintf(stderr, "Got VL %d, expected %d\n", ssve->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, ssve->vl);
+
+ return 0;
+}
+
+static int sme_regs(struct tdescr *td, siginfo_t *si, ucontext_t *uc)
+{
+ int i;
+
+ for (i = 0; i < nvls; i++) {
+ /*
+ * TODO: the signal test helpers can't currently cope
+ * with signal frames bigger than struct sigcontext,
+ * skip VLs that will trigger that.
+ */
+ if (vls[i] > 64) {
+ printf("Skipping VL %u due to stack size\n", vls[i]);
+ continue;
+ }
+
+ if (do_one_sme_vl(td, si, uc, vls[i]))
+ return 1;
+ }
+
+ td->pass = 1;
+
+ return 0;
+}
+
+struct tdescr tde = {
+ .name = "Streaming SVE registers",
+ .descr = "Check that we get the right Streaming SVE registers reported",
+ /*
+ * We shouldn't require FA64 but things like memset() used in the
+ * helpers might use unsupported instructions so for now disable
+ * the test unless we've got the full instruction set.
+ */
+ .feats_required = FEAT_SME | FEAT_SME_FA64,
+ .timeout = 3,
+ .init = sme_get_vls,
+ .run = sme_regs,
+};
new file mode 100644
@@ -0,0 +1,128 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Copyright (C) 2021 ARM Limited
+ *
+ * Verify that the ZA register context in signal frames is set up as
+ * expected.
+ */
+
+#include <signal.h>
+#include <ucontext.h>
+#include <sys/prctl.h>
+
+#include "test_signals_utils.h"
+#include "testcases.h"
+
+struct fake_sigframe sf;
+static unsigned int vls[SVE_VQ_MAX];
+unsigned int nvls = 0;
+
+static bool sme_get_vls(struct tdescr *td)
+{
+ int vq, vl;
+
+ /*
+ * Enumerate up to SVE_VQ_MAX vector lengths
+ */
+ for (vq = SVE_VQ_MAX; vq > 0; --vq) {
+ vl = prctl(PR_SVE_SET_VL, vq * 16);
+ if (vl == -1)
+ return false;
+
+ vl &= PR_SME_VL_LEN_MASK;
+
+ /* Skip missing VLs */
+ vq = sve_vq_from_vl(vl);
+
+ vls[nvls++] = vl;
+ }
+
+ /* We need at least one VL */
+ if (nvls < 1) {
+ fprintf(stderr, "Only %d VL supported\n", nvls);
+ return false;
+ }
+
+ return true;
+}
+
+static void setup_za_regs(void)
+{
+ /* smstart za; real data is TODO */
+ asm volatile(".inst 0xd503457f" : : : );
+}
+
+static int do_one_sme_vl(struct tdescr *td, siginfo_t *si, ucontext_t *uc,
+ unsigned int vl)
+{
+ size_t resv_sz, offset;
+ struct _aarch64_ctx *head = GET_SF_RESV_HEAD(sf);
+ struct za_context *za;
+
+ fprintf(stderr, "Testing VL %d\n", vl);
+
+ if (prctl(PR_SME_SET_VL, vl) != vl) {
+ fprintf(stderr, "Failed to set VL\n");
+ return 1;
+ }
+
+ /*
+ * Get a signal context which should have a SVE frame and registers
+ * in it.
+ */
+ setup_za_regs();
+ if (!get_current_context(td, &sf.uc))
+ return 1;
+
+ resv_sz = GET_SF_RESV_SIZE(sf);
+ head = get_header(head, ZA_MAGIC, resv_sz, &offset);
+ if (!head) {
+ fprintf(stderr, "No ZA context\n");
+ return 1;
+ }
+
+ za = (struct za_context *)head;
+ if (za->vl != vl) {
+ fprintf(stderr, "Got VL %d, expected %d\n", za->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, za->vl);
+
+ return 0;
+}
+
+static int sme_regs(struct tdescr *td, siginfo_t *si, ucontext_t *uc)
+{
+ int i;
+
+ for (i = 0; i < nvls; i++) {
+ /*
+ * TODO: the signal test helpers can't currently cope
+ * with signal frames bigger than struct sigcontext,
+ * skip VLs that will trigger that.
+ */
+ if (vls[i] > 32) {
+ printf("Skipping VL %u due to stack size\n", vls[i]);
+ continue;
+ }
+
+ if (do_one_sme_vl(td, si, uc, vls[i]))
+ return 1;
+ }
+
+ td->pass = 1;
+
+ return 0;
+}
+
+struct tdescr tde = {
+ .name = "ZA register",
+ .descr = "Check that we get the right ZA registers reported",
+ .feats_required = FEAT_SME,
+ .timeout = 3,
+ .init = sme_get_vls,
+ .run = sme_regs,
+};