From d2ccde1c8e90d38cee87a1b0309ad2827f3fd30d Mon Sep 17 00:00:00 2001
From: hc <hc@nodka.com>
Date: Mon, 11 Dec 2023 02:45:28 +0000
Subject: [PATCH] add boot partition size
---
kernel/tools/testing/selftests/powerpc/tm/tm-signal-context-chk-vmx.c | 83 +++++++++++++++++++++++++++--------------
1 files changed, 54 insertions(+), 29 deletions(-)
diff --git a/kernel/tools/testing/selftests/powerpc/tm/tm-signal-context-chk-vmx.c b/kernel/tools/testing/selftests/powerpc/tm/tm-signal-context-chk-vmx.c
index f0ee55f..b6d5273 100644
--- a/kernel/tools/testing/selftests/powerpc/tm/tm-signal-context-chk-vmx.c
+++ b/kernel/tools/testing/selftests/powerpc/tm/tm-signal-context-chk-vmx.c
@@ -1,19 +1,15 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
/*
* Copyright 2016, Cyril Bur, IBM Corp.
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License
- * as published by the Free Software Foundation; either version
- * 2 of the License, or (at your option) any later version.
- *
*
* Test the kernel's signal frame code.
*
* The kernel sets up two sets of ucontexts if the signal was to be
- * delivered while the thread was in a transaction.
+ * delivered while the thread was in a transaction (referred too as
+ * first and second contexts).
* Expected behaviour is that the checkpointed state is in the user
- * context passed to the signal handler. The speculated state can be
- * accessed with the uc_link pointer.
+ * context passed to the signal handler (first context). The speculated
+ * state can be accessed with the uc_link pointer (second context).
*
* The rationale for this is that if TM unaware code (which linked
* against TM libs) installs a signal handler it will not know of the
@@ -34,18 +30,24 @@
#define MAX_ATTEMPT 500000
-#define NV_VMX_REGS 12
+#define NV_VMX_REGS 12 /* Number of non-volatile VMX registers */
+#define VMX20 20 /* First non-volatile register to check in vr20-31 subset */
long tm_signal_self_context_load(pid_t pid, long *gprs, double *fps, vector int *vms, vector int *vss);
-static sig_atomic_t fail;
+static sig_atomic_t fail, broken;
+/* Test only non-volatile registers, i.e. 12 vmx registers from vr20 to vr31 */
vector int vms[] = {
- {1, 2, 3, 4 },{5, 6, 7, 8 },{9, 10,11,12},
+ /* First context will be set with these values, i.e. non-speculative */
+ /* VMX20 , VMX21 , ... */
+ { 1, 2, 3, 4},{ 5, 6, 7, 8},{ 9,10,11,12},
{13,14,15,16},{17,18,19,20},{21,22,23,24},
{25,26,27,28},{29,30,31,32},{33,34,35,36},
{37,38,39,40},{41,42,43,44},{45,46,47,48},
- {-1, -2, -3, -4}, {-5, -6, -7, -8}, {-9, -10,-11,-12},
+ /* Second context will be set with these values, i.e. speculative */
+ /* VMX20 , VMX21 , ... */
+ { -1, -2, -3, -4},{ -5, -6, -7, -8},{ -9,-10,-11,-12},
{-13,-14,-15,-16},{-17,-18,-19,-20},{-21,-22,-23,-24},
{-25,-26,-27,-28},{-29,-30,-31,-32},{-33,-34,-35,-36},
{-37,-38,-39,-40},{-41,-42,-43,-44},{-45,-46,-47,-48}
@@ -53,26 +55,43 @@
static void signal_usr1(int signum, siginfo_t *info, void *uc)
{
- int i;
+ int i, j;
ucontext_t *ucp = uc;
ucontext_t *tm_ucp = ucp->uc_link;
- for (i = 0; i < NV_VMX_REGS && !fail; i++) {
- fail = memcmp(ucp->uc_mcontext.v_regs->vrregs[i + 20],
+ for (i = 0; i < NV_VMX_REGS; i++) {
+ /* Check first context. Print all mismatches. */
+ fail = memcmp(ucp->uc_mcontext.v_regs->vrregs[VMX20 + i],
&vms[i], sizeof(vector int));
- fail |= memcmp(tm_ucp->uc_mcontext.v_regs->vrregs[i + 20],
- &vms[i + NV_VMX_REGS], sizeof (vector int));
-
if (fail) {
- int j;
-
- fprintf(stderr, "Failed on %d vmx 0x", i);
+ broken = 1;
+ printf("VMX%d (1st context) == 0x", VMX20 + i);
+ /* Print actual value in first context. */
for (j = 0; j < 4; j++)
- fprintf(stderr, "%04x", ucp->uc_mcontext.v_regs->vrregs[i + 20][j]);
- fprintf(stderr, " vs 0x");
- for (j = 0 ; j < 4; j++)
- fprintf(stderr, "%04x", tm_ucp->uc_mcontext.v_regs->vrregs[i + 20][j]);
- fprintf(stderr, "\n");
+ printf("%08x", ucp->uc_mcontext.v_regs->vrregs[VMX20 + i][j]);
+ printf(" instead of 0x");
+ /* Print expected value. */
+ for (j = 0; j < 4; j++)
+ printf("%08x", vms[i][j]);
+ printf(" (expected)\n");
+ }
+ }
+
+ for (i = 0; i < NV_VMX_REGS; i++) {
+ /* Check second context. Print all mismatches. */
+ fail = memcmp(tm_ucp->uc_mcontext.v_regs->vrregs[VMX20 + i],
+ &vms[NV_VMX_REGS + i], sizeof (vector int));
+ if (fail) {
+ broken = 1;
+ printf("VMX%d (2nd context) == 0x", NV_VMX_REGS + i);
+ /* Print actual value in second context. */
+ for (j = 0; j < 4; j++)
+ printf("%08x", tm_ucp->uc_mcontext.v_regs->vrregs[VMX20 + i][j]);
+ printf(" instead of 0x");
+ /* Print expected value. */
+ for (j = 0; j < 4; j++)
+ printf("%08x", vms[NV_VMX_REGS + i][j]);
+ printf(" (expected)\n");
}
}
}
@@ -95,13 +114,19 @@
}
i = 0;
- while (i < MAX_ATTEMPT && !fail) {
+ while (i < MAX_ATTEMPT && !broken) {
+ /*
+ * tm_signal_self_context_load will set both first and second
+ * contexts accordingly to the values passed through non-NULL
+ * array pointers to it, in that case 'vms', and invoke the
+ * signal handler installed for SIGUSR1.
+ */
rc = tm_signal_self_context_load(pid, NULL, NULL, vms, NULL);
FAIL_IF(rc != pid);
i++;
}
- return fail;
+ return (broken);
}
int main(void)
--
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