As userfaultfd syscall is available on powerpc, migration postcopy can be used.
This patch adds the support needed to test this on powerpc, instead of using a bootsector to run code to modify memory, we use a FORTH script in "boot-command" property. As spapr machine doesn't support "-prom-env" argument (the nvram is initialized by SLOF and not by QEMU), "boot-command" is provided to SLOF via a file mapped nvram (with "-drive file=...,if=pflash") Signed-off-by: Laurent Vivier <lviv...@redhat.com> --- tests/Makefile.include | 1 + tests/postcopy-test.c | 141 ++++++++++++++++++++++++++++++++++++++++++------- 2 files changed, 123 insertions(+), 19 deletions(-) diff --git a/tests/Makefile.include b/tests/Makefile.include index e7e50d6..e2d1885 100644 --- a/tests/Makefile.include +++ b/tests/Makefile.include @@ -268,6 +268,7 @@ check-qtest-sparc-y += tests/prom-env-test$(EXESUF) #check-qtest-sparc64-y += tests/prom-env-test$(EXESUF) check-qtest-microblazeel-y = $(check-qtest-microblaze-y) check-qtest-xtensaeb-y = $(check-qtest-xtensa-y) +check-qtest-ppc64-y += tests/postcopy-test$(EXESUF) check-qtest-generic-y += tests/qom-test$(EXESUF) diff --git a/tests/postcopy-test.c b/tests/postcopy-test.c index 16465ab..439afd9 100644 --- a/tests/postcopy-test.c +++ b/tests/postcopy-test.c @@ -19,6 +19,24 @@ #include "sysemu/char.h" #include "sysemu/sysemu.h" +/* These structures are already defined by OpenBIOS and usable with SLOF */ +#define NVRAM_PART_SYSTEM 0x70 +struct nvpart { + uint8_t signature; + uint8_t checksum; + uint16_t len; /* BE, length divided by 16 */ + char name[12]; + char content[0]; +}; + +#define MIN_NVRAM_SIZE 8192 /* from spapr_nvram.c */ + +/* FW_MAX_SIZE is 4MB, but slof.bin is only 900KB, + * so let's modify memory between 1MB and 100MB + * to do like PC bootsector + */ +#define FORTH_BOOTSCRIPT "boot-command=hex .\" _\" begin %x %x do i c@ 1 + i c! 1000 +loop .\" B\" 0 until" + const unsigned start_address = 1024 * 1024; const unsigned end_address = 100 * 1024 * 1024; bool got_stop; @@ -122,6 +140,52 @@ unsigned char bootsect[] = { 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x55, 0xaa }; +static void init_bootfile_x86(const char *bootpath) +{ + FILE *bootfile = fopen(bootpath, "wb"); + + g_assert_cmpint(fwrite(bootsect, 512, 1, bootfile), ==, 1); + fclose(bootfile); +} + +static void nvpart_checksum(struct nvpart *header) +{ + unsigned int i, sum; + uint8_t *tmpptr; + + tmpptr = (uint8_t *)header; + sum = *tmpptr; + for (i = 0; i < 14; i++) { + sum += tmpptr[2 + i]; + sum = (sum + ((sum & 0xff00) >> 8)) & 0xff; + } + header->checksum = sum & 0xff; +} + +static void init_bootfile_ppc(const char *bootpath) +{ + FILE *bootfile; + char buf[MIN_NVRAM_SIZE]; + struct nvpart *header = (struct nvpart *)buf; + + memset(buf, 0, MIN_NVRAM_SIZE); + + /* Create a "common" partition in nvram to store boot-command property */ + + header->signature = NVRAM_PART_SYSTEM; + memcpy(header->name, "common", 6); + header->len = cpu_to_be16(MIN_NVRAM_SIZE >> 4); + nvpart_checksum(header); /* can change if we change header->len */ + + sprintf(header->content, FORTH_BOOTSCRIPT, end_address, start_address); + + /* Write partition to the NVRAM file */ + + bootfile = fopen(bootpath, "wb"); + g_assert_cmpint(fwrite(buf, MIN_NVRAM_SIZE, 1, bootfile), ==, 1); + fclose(bootfile); +} + /* * Wait for some output in the serial output file, * we get an 'A' followed by an endless string of 'B's @@ -131,10 +195,31 @@ static void wait_for_serial(const char *side) { char *serialpath = g_strdup_printf("%s/%s", tmpfs, side); FILE *serialfile = fopen(serialpath, "r"); + const char *arch = qtest_get_arch(); + int started = (strcmp(side, "src_serial") == 0 && + strcmp(arch, "ppc64") == 0) ? 0 : 1; do { int readvalue = fgetc(serialfile); + if (!started) { + /* SLOF prints its banner before starting test, + * to ignore it, mark the start of the test with '_', + * ignore all characters until this marker + */ + switch (readvalue) { + case '_': + started = 1; + break; + case EOF: + fseek(serialfile, 0, SEEK_SET); + usleep(1000); + break; + default: + break; + } + continue; + } switch (readvalue) { case 'A': /* Fine */ @@ -147,6 +232,8 @@ static void wait_for_serial(const char *side) return; case EOF: + started = (strcmp(side, "src_serial") == 0 && + strcmp(arch, "ppc64") == 0) ? 0 : 1; fseek(serialfile, 0, SEEK_SET); usleep(1000); break; @@ -295,32 +382,48 @@ static void test_migrate(void) char *uri = g_strdup_printf("unix:%s/migsocket", tmpfs); QTestState *global = global_qtest, *from, *to; unsigned char dest_byte_a, dest_byte_b, dest_byte_c, dest_byte_d; - gchar *cmd; + gchar *cmd, *cmd_src, *cmd_dst; QDict *rsp; char *bootpath = g_strdup_printf("%s/bootsect", tmpfs); - FILE *bootfile = fopen(bootpath, "wb"); + const char *arch = qtest_get_arch(); got_stop = false; - g_assert_cmpint(fwrite(bootsect, 512, 1, bootfile), ==, 1); - fclose(bootfile); - cmd = g_strdup_printf("-machine accel=kvm:tcg -m 150M" - " -name pcsource,debug-threads=on" - " -serial file:%s/src_serial" - " -drive file=%s,format=raw", - tmpfs, bootpath); - from = qtest_start(cmd); - g_free(cmd); + if (strcmp(arch, "i386") == 0 || strcmp(arch, "x86_64") == 0) { + init_bootfile_x86(bootpath); + cmd_src = g_strdup_printf("-machine accel=kvm:tcg -m 150M" + " -name pcsource,debug-threads=on" + " -serial file:%s/src_serial" + " -drive file=%s,format=raw", + tmpfs, bootpath); + cmd_dst = g_strdup_printf("-machine accel=kvm:tcg -m 150M" + " -name pcdest,debug-threads=on" + " -serial file:%s/dest_serial" + " -drive file=%s,format=raw" + " -incoming %s", + tmpfs, bootpath, uri); + } else if (strcmp(arch, "ppc64") == 0) { + init_bootfile_ppc(bootpath); + cmd_src = g_strdup_printf("-machine accel=kvm:tcg -m 256M" + " -name pcsource,debug-threads=on" + " -serial file:%s/src_serial" + " -drive file=%s,if=pflash,format=raw", + tmpfs, bootpath); + cmd_dst = g_strdup_printf("-machine accel=kvm:tcg -m 256M" + " -name pcdest,debug-threads=on" + " -serial file:%s/dest_serial" + " -incoming %s", + tmpfs, uri); + } else { + g_assert_not_reached(); + } - cmd = g_strdup_printf("-machine accel=kvm:tcg -m 150M" - " -name pcdest,debug-threads=on" - " -serial file:%s/dest_serial" - " -drive file=%s,format=raw" - " -incoming %s", - tmpfs, bootpath, uri); - to = qtest_init(cmd); - g_free(cmd); + from = qtest_start(cmd_src); + g_free(cmd_src); + + to = qtest_init(cmd_dst); + g_free(cmd_dst); global_qtest = from; rsp = qmp("{ 'execute': 'migrate-set-capabilities'," -- 2.5.5