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qemu/tests/qtest/boot-serial-test.c
Philippe Mathieu-Daudé 1bb7f615a5 tests/qtest/boot-serial-test: Initialize PL011 Control register 
The tests using the PL011 UART of the virt and raspi machines
weren't properly enabling the UART and its transmitter previous
to sending characters. Follow the PL011 manual initialization
recommendation by setting the proper bits of the control register.

Update the ASM code prefixing:

  *UART_CTRL = UART_ENABLE | TX_ENABLE;

to:

  while (true) {
      *UART_DATA = 'T';
  }

Note, since commit 51b61dd4d5 ("hw/char/pl011: Warn when using
disabled transmitter") incomplete PL011 initialization can be
logged using the '-d guest_errors' command line option.

Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
2025-01-13 12:35:33 +00:00

320 lines
14 KiB
C
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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"
#include "ppc-util.h"
static const uint8_t bios_avr[] = {
0x88, 0xe0, /* ldi r24, 0x08 */
0x80, 0x93, 0xc1, 0x00, /* sts 0x00C1, r24 ; Enable tx */
0x86, 0xe0, /* ldi r24, 0x06 */
0x80, 0x93, 0xc2, 0x00, /* sts 0x00C2, r24 ; Set the data bits to 8 */
0x84, 0xe5, /* ldi r24, 0x54 */
0x80, 0x93, 0xc6, 0x00, /* sts 0x00C6, r24 ; Output 'T' */
};
static const uint8_t bios_loongarch64[] = {
0x0c, 0xc0, 0x3f, 0x14, /* lu12i.w $t0, 0x1fe00 */
0x8c, 0x81, 0x87, 0x03, /* ori $t0, $t0, 0x1e0 */
0x0d, 0x50, 0x81, 0x03, /* li.w $t1, 'T' */
0x8d, 0x01, 0x00, 0x29, /* st.b $t1, $t0, 0 */
0xff, 0xf3, 0xff, 0x53, /* b -16 # loop */
};
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 bios_nextcube[] = {
0x06, 0x00, 0x00, 0x00, /* Initial SP */
0x01, 0x00, 0x00, 0x08, /* Initial PC */
0x41, 0xf9, 0x02, 0x11, 0x80, 0x00, /* lea 0x02118000,%a0 */
0x10, 0x3c, 0x00, 0x54, /* move.b #'T',%d0 */
0x11, 0x7c, 0x00, 0x05, 0x00, 0x01, /* move.b #5,1(%a0) Sel TXCTRL */
0x11, 0x7c, 0x00, 0x68, 0x00, 0x01, /* move.b #0x68,1(%a0) Enable TX */
0x11, 0x40, 0x00, 0x03, /* move.b %d0,3(%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_raspi2[] = {
0x10, 0x30, 0x9f, 0xe5, /* ldr r3, [pc, #16] Get &UART0 */
0x10, 0x20, 0x9f, 0xe5, /* ldr r2, [pc, #16] Get &CR */
0xb0, 0x23, 0xc3, 0xe1, /* strh r2, [r3, #48] Set CR */
0x54, 0x20, 0xa0, 0xe3, /* mov r2, #'T' */
0x00, 0x20, 0xc3, 0xe5, /* loop: strb r2, [r3] *TXDAT = 'T' */
0xff, 0xff, 0xff, 0xea, /* b -4 (loop) */
0x00, 0x10, 0x20, 0x3f, /* UART0: 0x3f201000 */
0x01, 0x01, 0x00, 0x00, /* CR: 0x101 = UARTEN|TXE */
};
static const uint8_t kernel_aarch64[] = {
0x02, 0x20, 0xa1, 0xd2, /* mov x2, #0x9000000 Load UART0 */
0x21, 0x20, 0x80, 0x52, /* mov w1, 0x101 CR = UARTEN|TXE */
0x41, 0x60, 0x00, 0x79, /* strh w1, [x2, #48] Set CR */
0x81, 0x0a, 0x80, 0x52, /* mov w1, #'T' */
0x41, 0x00, 0x00, 0x39, /* loop: strb w1, [x2] *TXDAT = 'T' */
0xff, 0xff, 0xff, 0x17, /* b -4 (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 */
};
static const uint8_t kernel_stm32vldiscovery[] = {
0x00, 0x00, 0x00, 0x00, /* Stack top address */
0x1d, 0x00, 0x00, 0x00, /* Reset handler address */
0x00, 0x00, 0x00, 0x00, /* NMI */
0x00, 0x00, 0x00, 0x00, /* Hard fault */
0x00, 0x00, 0x00, 0x00, /* Memory management fault */
0x00, 0x00, 0x00, 0x00, /* Bus fault */
0x00, 0x00, 0x00, 0x00, /* Usage fault */
0x0b, 0x4b, /* ldr r3, [pc, #44] Get RCC */
0x44, 0xf2, 0x04, 0x02, /* movw r2, #16388 */
0x1a, 0x60, /* str r2, [r3] */
0x0a, 0x4b, /* ldr r3, [pc, #40] Get GPIOA */
0x1a, 0x68, /* ldr r2, [r3] */
0x22, 0xf0, 0xf0, 0x02, /* bic r2, r2, #240 */
0x1a, 0x60, /* str r2, [r3] */
0x1a, 0x68, /* ldr r2, [r3] */
0x42, 0xf0, 0xb0, 0x02, /* orr r2, r2, #176 */
0x1a, 0x60, /* str r2, [r3] */
0x07, 0x4b, /* ldr r3, [pc, #26] Get BAUD */
0x45, 0x22, /* movs r2, #69 */
0x1a, 0x60, /* str r2, [r3] */
0x06, 0x4b, /* ldr r3, [pc, #24] Get ENABLE */
0x42, 0xf2, 0x08, 0x02, /* movw r2, #8200 */
0x1a, 0x60, /* str r2, [r3] */
0x05, 0x4b, /* ldr r3, [pc, #20] Get TXD */
0x54, 0x22, /* movs r2, 'T' */
0x1a, 0x60, /* str r2, [r3] */
0xfe, 0xe7, /* b . */
0x18, 0x10, 0x02, 0x40, /* 0x40021018 = RCC */
0x04, 0x08, 0x01, 0x40, /* 0x40010804 = GPIOA */
0x08, 0x38, 0x01, 0x40, /* 0x40013808 = USART1 BAUD */
0x0c, 0x38, 0x01, 0x40, /* 0x4001380c = USART1 ENABLE */
0x04, 0x38, 0x01, 0x40 /* 0x40013804 = USART1 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 const testdef_t tests[] = {
{ "alpha", "clipper", "", "PCI:" },
{ "avr", "arduino-duemilanove", "", "T", sizeof(bios_avr), NULL, bios_avr },
{ "avr", "arduino-mega-2560-v3", "", "T", sizeof(bios_avr), NULL, bios_avr},
{ "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 " PSERIES_DEFAULT_CAPABILITIES,
"Open Firmware" },
{ "ppc64", "powernv8", "", "OPAL" },
{ "ppc64", "powernv9", "", "OPAL" },
{ "ppc64", "sam460ex", "-device pci-bridge,chassis_nr=2", "1b36 0001" },
{ "i386", "isapc", "-cpu qemu32 -M graphics=off", "SeaBIOS" },
{ "i386", "pc", "-M graphics=off", "SeaBIOS" },
{ "i386", "q35", "-M graphics=off", "SeaBIOS" },
{ "x86_64", "isapc", "-cpu qemu32 -M graphics=off", "SeaBIOS" },
{ "x86_64", "q35", "-M graphics=off", "SeaBIOS" },
{ "sparc", "LX", "", "TMS390S10" },
{ "sparc", "SS-4", "", "MB86904" },
{ "sparc", "SS-600MP", "", "TMS390Z55" },
{ "sparc64", "sun4u", "", "UltraSPARC" },
{ "s390x", "s390-ccw-virtio", "", "device" },
{ "loongarch64", "virt", "-cpu max", "TT", sizeof(bios_loongarch64),
NULL, bios_loongarch64 },
{ "m68k", "mcf5208evb", "", "TT", sizeof(kernel_mcf5208), kernel_mcf5208 },
{ "m68k", "next-cube", "", "TT", sizeof(bios_nextcube), 0, bios_nextcube },
{ "microblaze", "petalogix-s3adsp1800", "", "TT",
sizeof(kernel_pls3adsp1800), kernel_pls3adsp1800 },
{ "microblazeel", "petalogix-ml605", "", "TT",
sizeof(kernel_plml605), kernel_plml605 },
{ "arm", "raspi2b", "", "TT", sizeof(bios_raspi2), 0, bios_raspi2 },
/* For hppa, force bios to output to serial by disabling graphics. */
{ "hppa", "hppa", "-vga none", "SeaBIOS wants SYSTEM HALT" },
{ "aarch64", "virt", "-cpu max", "TT", sizeof(kernel_aarch64),
kernel_aarch64 },
{ "arm", "microbit", "", "T", sizeof(kernel_nrf51), kernel_nrf51 },
{ "arm", "stm32vldiscovery", "", "T",
sizeof(kernel_stm32vldiscovery), kernel_stm32vldiscovery },
{ 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;
g_autofree char *serialtmp = NULL;
g_autofree char *codetmp = NULL;
const char *codeparam = "";
const uint8_t *code = NULL;
QTestState *qts;
int ser_fd;
ser_fd = g_file_open_tmp("qtest-boot-serial-sXXXXXX", &serialtmp, NULL);
g_assert(ser_fd != -1);
close(ser_fd);
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 = g_file_open_tmp("qtest-boot-serial-cXXXXXX", &codetmp, NULL);
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 -no-shutdown "
"-chardev file,id=serial0,path=%s "
"-serial chardev:serial0 -accel tcg -accel kvm %s",
codeparam, code ? codetmp : "", test->machine,
serialtmp, test->extra);
if (code) {
unlink(codetmp);
}
ser_fd = open(serialtmp, O_RDONLY);
g_assert(ser_fd != -1);
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);
if (!qtest_has_accel("tcg") && !qtest_has_accel("kvm")) {
g_test_skip("No KVM or TCG accelerator available");
return 0;
}
for (i = 0; tests[i].arch != NULL; i++) {
if (g_str_equal(arch, tests[i].arch) &&
qtest_has_machine(tests[i].machine)) {
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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