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qemu-patch-raspberry4/tests/boot-serial-test.c
David Gibson ba3b40de42 Suppress test warnings about missing Spectre/Meltdown mitigations with TCG 
The new pseries-4.0 machine type defaults to enabling Spectre/Meltdown
mitigations.  Unfortunately those mitigations aren't implemented for TCG
because we're not yet sure if they're necessary or how to implement them.
We don't fail fatally, but we do warn in this case, because it is quite
plausible that Spectre/Meltdown can be exploited through TCG (at least for
the guest to get access to the qemu address space).

This create noise in our testcases though.  So, modify the affected tests
to explicitly disable the mitigations to suppress these warnings.

Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
2019-03-12 16:07:14 +11:00

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/*
* Test serial output of some machines.
*
* Copyright 2016 Thomas Huth, Red Hat Inc.
*
* This work is licensed under the terms of the GNU GPL, version 2
* or later. See the COPYING file in the top-level directory.
*
* This test is used to check that the serial output of the firmware
* (that we provide for some machines) or some small mini-kernels that
* we provide here contains an expected string. Thus we check that the
* firmware/kernel still boots at least to a certain point and so we
* know that the machine is not completely broken.
*/
#include "qemu/osdep.h"
#include "libqtest.h"
static const uint8_t kernel_mcf5208[] = {
0x41, 0xf9, 0xfc, 0x06, 0x00, 0x00, /* lea 0xfc060000,%a0 */
0x10, 0x3c, 0x00, 0x54, /* move.b #'T',%d0 */
0x11, 0x7c, 0x00, 0x04, 0x00, 0x08, /* move.b #4,8(%a0) Enable TX */
0x11, 0x40, 0x00, 0x0c, /* move.b %d0,12(%a0) Print 'T' */
0x60, 0xfa /* bra.s loop */
};
static const uint8_t kernel_pls3adsp1800[] = {
0xb0, 0x00, 0x84, 0x00, /* imm 0x8400 */
0x30, 0x60, 0x00, 0x04, /* addik r3,r0,4 */
0x30, 0x80, 0x00, 0x54, /* addik r4,r0,'T' */
0xf0, 0x83, 0x00, 0x00, /* sbi r4,r3,0 */
0xb8, 0x00, 0xff, 0xfc /* bri -4 loop */
};
static const uint8_t kernel_plml605[] = {
0xe0, 0x83, 0x00, 0xb0, /* imm 0x83e0 */
0x00, 0x10, 0x60, 0x30, /* addik r3,r0,0x1000 */
0x54, 0x00, 0x80, 0x30, /* addik r4,r0,'T' */
0x00, 0x00, 0x83, 0xf0, /* sbi r4,r3,0 */
0xfc, 0xff, 0x00, 0xb8 /* bri -4 loop */
};
static const uint8_t bios_moxiesim[] = {
0x20, 0x10, 0x00, 0x00, 0x03, 0xf8, /* ldi.s r1,0x3f8 */
0x1b, 0x20, 0x00, 0x00, 0x00, 0x54, /* ldi.b r2,'T' */
0x1e, 0x12, /* st.b r1,r2 */
0x1a, 0x00, 0x00, 0x00, 0x10, 0x00 /* jmpa 0x1000 */
};
static const uint8_t bios_raspi2[] = {
0x08, 0x30, 0x9f, 0xe5, /* ldr r3,[pc,#8] Get base */
0x54, 0x20, 0xa0, 0xe3, /* mov r2,#'T' */
0x00, 0x20, 0xc3, 0xe5, /* strb r2,[r3] */
0xfb, 0xff, 0xff, 0xea, /* b loop */
0x00, 0x10, 0x20, 0x3f, /* 0x3f201000 = UART0 base addr */
};
static const uint8_t kernel_aarch64[] = {
0x81, 0x0a, 0x80, 0x52, /* mov w1, #0x54 */
0x02, 0x20, 0xa1, 0xd2, /* mov x2, #0x9000000 */
0x41, 0x00, 0x00, 0x39, /* strb w1, [x2] */
0xfd, 0xff, 0xff, 0x17, /* b -12 (loop) */
};
static const uint8_t kernel_nrf51[] = {
0x00, 0x00, 0x00, 0x00, /* Stack top address */
0x09, 0x00, 0x00, 0x00, /* Reset handler address */
0x04, 0x4a, /* ldr r2, [pc, #16] Get ENABLE */
0x04, 0x21, /* movs r1, #4 */
0x11, 0x60, /* str r1, [r2] */
0x04, 0x4a, /* ldr r2, [pc, #16] Get STARTTX */
0x01, 0x21, /* movs r1, #1 */
0x11, 0x60, /* str r1, [r2] */
0x03, 0x4a, /* ldr r2, [pc, #12] Get TXD */
0x54, 0x21, /* movs r1, 'T' */
0x11, 0x60, /* str r1, [r2] */
0xfe, 0xe7, /* b . */
0x00, 0x25, 0x00, 0x40, /* 0x40002500 = UART ENABLE */
0x08, 0x20, 0x00, 0x40, /* 0x40002008 = UART STARTTX */
0x1c, 0x25, 0x00, 0x40 /* 0x4000251c = UART TXD */
};
typedef struct testdef {
const char *arch; /* Target architecture */
const char *machine; /* Name of the machine */
const char *extra; /* Additional parameters */
const char *expect; /* Expected string in the serial output */
size_t codesize; /* Size of the kernel or bios data */
const uint8_t *kernel; /* Set in case we use our own mini kernel */
const uint8_t *bios; /* Set in case we use our own mini bios */
} testdef_t;
static testdef_t tests[] = {
{ "alpha", "clipper", "", "PCI:" },
{ "ppc", "ppce500", "", "U-Boot" },
{ "ppc", "40p", "-vga none -boot d", "Trying cd:," },
{ "ppc", "g3beige", "", "PowerPC,750" },
{ "ppc", "mac99", "", "PowerPC,G4" },
{ "ppc", "sam460ex", "-m 256", "DRAM: 256 MiB" },
{ "ppc64", "ppce500", "", "U-Boot" },
{ "ppc64", "40p", "-m 192", "Memory: 192M" },
{ "ppc64", "mac99", "", "PowerPC,970FX" },
{ "ppc64", "pseries",
"-machine cap-cfpc=broken,cap-sbbc=broken,cap-ibs=broken",
"Open Firmware" },
{ "ppc64", "powernv", "-cpu POWER8", "OPAL" },
{ "ppc64", "sam460ex", "-device e1000", "8086 100e" },
{ "i386", "isapc", "-cpu qemu32 -device sga", "SGABIOS" },
{ "i386", "pc", "-device sga", "SGABIOS" },
{ "i386", "q35", "-device sga", "SGABIOS" },
{ "x86_64", "isapc", "-cpu qemu32 -device sga", "SGABIOS" },
{ "x86_64", "q35", "-device sga", "SGABIOS" },
{ "sparc", "LX", "", "TMS390S10" },
{ "sparc", "SS-4", "", "MB86904" },
{ "sparc", "SS-600MP", "", "TMS390Z55" },
{ "sparc64", "sun4u", "", "UltraSPARC" },
{ "s390x", "s390-ccw-virtio", "", "virtio device" },
{ "m68k", "mcf5208evb", "", "TT", sizeof(kernel_mcf5208), kernel_mcf5208 },
{ "microblaze", "petalogix-s3adsp1800", "", "TT",
sizeof(kernel_pls3adsp1800), kernel_pls3adsp1800 },
{ "microblazeel", "petalogix-ml605", "", "TT",
sizeof(kernel_plml605), kernel_plml605 },
{ "moxie", "moxiesim", "", "TT", sizeof(bios_moxiesim), 0, bios_moxiesim },
{ "arm", "raspi2", "", "TT", sizeof(bios_raspi2), 0, bios_raspi2 },
{ "hppa", "hppa", "", "SeaBIOS wants SYSTEM HALT" },
{ "aarch64", "virt", "-cpu cortex-a57", "TT", sizeof(kernel_aarch64),
kernel_aarch64 },
{ "arm", "microbit", "", "T", sizeof(kernel_nrf51), kernel_nrf51 },
{ NULL }
};
static bool check_guest_output(QTestState *qts, const testdef_t *test, int fd)
{
int nbr = 0, pos = 0, ccnt;
time_t now, start = time(NULL);
char ch;
/* Poll serial output... */
while (1) {
ccnt = 0;
while (ccnt++ < 512 && (nbr = read(fd, &ch, 1)) == 1) {
if (ch == test->expect[pos]) {
pos += 1;
if (test->expect[pos] == '\0') {
/* We've reached the end of the expected string! */
return true;
}
} else {
pos = 0;
}
}
g_assert(nbr >= 0);
/* Wait only if the child is still alive. */
if (!qtest_probe_child(qts)) {
break;
}
/* Wait at most 360 seconds. */
now = time(NULL);
if (now - start >= 360) {
break;
}
g_usleep(10000);
}
return false;
}
static void test_machine(const void *data)
{
const testdef_t *test = data;
char serialtmp[] = "/tmp/qtest-boot-serial-sXXXXXX";
char codetmp[] = "/tmp/qtest-boot-serial-cXXXXXX";
const char *codeparam = "";
const uint8_t *code = NULL;
QTestState *qts;
int ser_fd;
ser_fd = mkstemp(serialtmp);
g_assert(ser_fd != -1);
if (test->kernel) {
code = test->kernel;
codeparam = "-kernel";
} else if (test->bios) {
code = test->bios;
codeparam = "-bios";
}
if (code) {
ssize_t wlen;
int code_fd;
code_fd = mkstemp(codetmp);
g_assert(code_fd != -1);
wlen = write(code_fd, code, test->codesize);
g_assert(wlen == test->codesize);
close(code_fd);
}
/*
* Make sure that this test uses tcg if available: It is used as a
* fast-enough smoketest for that.
*/
qts = qtest_initf("%s %s -M %s,accel=tcg:kvm -no-shutdown "
"-chardev file,id=serial0,path=%s "
"-serial chardev:serial0 %s",
codeparam, code ? codetmp : "", test->machine,
serialtmp, test->extra);
if (code) {
unlink(codetmp);
}
if (!check_guest_output(qts, test, ser_fd)) {
g_error("Failed to find expected string. Please check '%s'",
serialtmp);
}
unlink(serialtmp);
qtest_quit(qts);
close(ser_fd);
}
int main(int argc, char *argv[])
{
const char *arch = qtest_get_arch();
int i;
g_test_init(&argc, &argv, NULL);
for (i = 0; tests[i].arch != NULL; i++) {
if (strcmp(arch, tests[i].arch) == 0) {
char *name = g_strdup_printf("boot-serial/%s", tests[i].machine);
qtest_add_data_func(name, &tests[i], test_machine);
g_free(name);
}
}
return g_test_run();
}
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