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-rw-r--r--dump/dump.c288
-rw-r--r--dump/win_dump.c7
-rw-r--r--hw/s390x/pv.c112
-rw-r--r--hw/s390x/s390-virtio-ccw.c6
-rw-r--r--include/elf.h2
-rw-r--r--include/hw/s390x/pv.h19
-rw-r--r--include/sysemu/dump-arch.h3
-rw-r--r--include/sysemu/dump.h26
-rw-r--r--target/s390x/arch_dump.c262
-rw-r--r--target/s390x/kvm/kvm.c7
-rw-r--r--target/s390x/kvm/kvm_s390x.h1
-rw-r--r--target/s390x/kvm/meson.build2
-rw-r--r--target/s390x/kvm/stubs.c12
13 files changed, 649 insertions, 98 deletions
diff --git a/dump/dump.c b/dump/dump.c
index 236559b..df117c8 100644
--- a/dump/dump.c
+++ b/dump/dump.c
@@ -103,6 +103,7 @@ static int dump_cleanup(DumpState *s)
memory_mapping_list_free(&s->list);
close(s->fd);
g_free(s->guest_note);
+ g_array_unref(s->string_table_buf);
s->guest_note = NULL;
if (s->resume) {
if (s->detached) {
@@ -152,11 +153,10 @@ static void prepare_elf64_header(DumpState *s, Elf64_Ehdr *elf_header)
elf_header->e_phoff = cpu_to_dump64(s, s->phdr_offset);
elf_header->e_phentsize = cpu_to_dump16(s, sizeof(Elf64_Phdr));
elf_header->e_phnum = cpu_to_dump16(s, phnum);
- if (s->shdr_num) {
- elf_header->e_shoff = cpu_to_dump64(s, s->shdr_offset);
- elf_header->e_shentsize = cpu_to_dump16(s, sizeof(Elf64_Shdr));
- elf_header->e_shnum = cpu_to_dump16(s, s->shdr_num);
- }
+ elf_header->e_shoff = cpu_to_dump64(s, s->shdr_offset);
+ elf_header->e_shentsize = cpu_to_dump16(s, sizeof(Elf64_Shdr));
+ elf_header->e_shnum = cpu_to_dump16(s, s->shdr_num);
+ elf_header->e_shstrndx = cpu_to_dump16(s, s->shdr_num - 1);
}
static void prepare_elf32_header(DumpState *s, Elf32_Ehdr *elf_header)
@@ -180,11 +180,10 @@ static void prepare_elf32_header(DumpState *s, Elf32_Ehdr *elf_header)
elf_header->e_phoff = cpu_to_dump32(s, s->phdr_offset);
elf_header->e_phentsize = cpu_to_dump16(s, sizeof(Elf32_Phdr));
elf_header->e_phnum = cpu_to_dump16(s, phnum);
- if (s->shdr_num) {
- elf_header->e_shoff = cpu_to_dump32(s, s->shdr_offset);
- elf_header->e_shentsize = cpu_to_dump16(s, sizeof(Elf32_Shdr));
- elf_header->e_shnum = cpu_to_dump16(s, s->shdr_num);
- }
+ elf_header->e_shoff = cpu_to_dump32(s, s->shdr_offset);
+ elf_header->e_shentsize = cpu_to_dump16(s, sizeof(Elf32_Shdr));
+ elf_header->e_shnum = cpu_to_dump16(s, s->shdr_num);
+ elf_header->e_shstrndx = cpu_to_dump16(s, s->shdr_num - 1);
}
static void write_elf_header(DumpState *s, Error **errp)
@@ -195,6 +194,8 @@ static void write_elf_header(DumpState *s, Error **errp)
void *header_ptr;
int ret;
+ /* The NULL header and the shstrtab are always defined */
+ assert(s->shdr_num >= 2);
if (dump_is_64bit(s)) {
prepare_elf64_header(s, &elf64_header);
header_size = sizeof(elf64_header);
@@ -380,30 +381,136 @@ static void write_elf_phdr_note(DumpState *s, Error **errp)
}
}
-static void write_elf_section(DumpState *s, int type, Error **errp)
+static void prepare_elf_section_hdr_zero(DumpState *s)
{
- Elf32_Shdr shdr32;
- Elf64_Shdr shdr64;
+ if (dump_is_64bit(s)) {
+ Elf64_Shdr *shdr64 = s->elf_section_hdrs;
+
+ shdr64->sh_info = cpu_to_dump32(s, s->phdr_num);
+ } else {
+ Elf32_Shdr *shdr32 = s->elf_section_hdrs;
+
+ shdr32->sh_info = cpu_to_dump32(s, s->phdr_num);
+ }
+}
+
+static void prepare_elf_section_hdr_string(DumpState *s, void *buff)
+{
+ uint64_t index = s->string_table_buf->len;
+ const char strtab[] = ".shstrtab";
+ Elf32_Shdr shdr32 = {};
+ Elf64_Shdr shdr64 = {};
int shdr_size;
void *shdr;
- int ret;
- if (type == 0) {
- shdr_size = sizeof(Elf32_Shdr);
- memset(&shdr32, 0, shdr_size);
- shdr32.sh_info = cpu_to_dump32(s, s->phdr_num);
- shdr = &shdr32;
- } else {
+ g_array_append_vals(s->string_table_buf, strtab, sizeof(strtab));
+ if (dump_is_64bit(s)) {
shdr_size = sizeof(Elf64_Shdr);
- memset(&shdr64, 0, shdr_size);
- shdr64.sh_info = cpu_to_dump32(s, s->phdr_num);
+ shdr64.sh_type = SHT_STRTAB;
+ shdr64.sh_offset = s->section_offset + s->elf_section_data_size;
+ shdr64.sh_name = index;
+ shdr64.sh_size = s->string_table_buf->len;
shdr = &shdr64;
+ } else {
+ shdr_size = sizeof(Elf32_Shdr);
+ shdr32.sh_type = SHT_STRTAB;
+ shdr32.sh_offset = s->section_offset + s->elf_section_data_size;
+ shdr32.sh_name = index;
+ shdr32.sh_size = s->string_table_buf->len;
+ shdr = &shdr32;
+ }
+ memcpy(buff, shdr, shdr_size);
+}
+
+static bool prepare_elf_section_hdrs(DumpState *s, Error **errp)
+{
+ size_t len, sizeof_shdr;
+ void *buff_hdr;
+
+ /*
+ * Section ordering:
+ * - HDR zero
+ * - Arch section hdrs
+ * - String table hdr
+ */
+ sizeof_shdr = dump_is_64bit(s) ? sizeof(Elf64_Shdr) : sizeof(Elf32_Shdr);
+ len = sizeof_shdr * s->shdr_num;
+ s->elf_section_hdrs = g_malloc0(len);
+ buff_hdr = s->elf_section_hdrs;
+
+ /*
+ * The first section header is ALWAYS a special initial section
+ * header.
+ *
+ * The header should be 0 with one exception being that if
+ * phdr_num is PN_XNUM then the sh_info field contains the real
+ * number of segment entries.
+ *
+ * As we zero allocate the buffer we will only need to modify
+ * sh_info for the PN_XNUM case.
+ */
+ if (s->phdr_num >= PN_XNUM) {
+ prepare_elf_section_hdr_zero(s);
}
+ buff_hdr += sizeof_shdr;
+
+ /* Add architecture defined section headers */
+ if (s->dump_info.arch_sections_write_hdr_fn
+ && s->shdr_num > 2) {
+ buff_hdr += s->dump_info.arch_sections_write_hdr_fn(s, buff_hdr);
+
+ if (s->shdr_num >= SHN_LORESERVE) {
+ error_setg_errno(errp, EINVAL,
+ "dump: too many architecture defined sections");
+ return false;
+ }
+ }
+
+ /*
+ * String table is the last section since strings are added via
+ * arch_sections_write_hdr().
+ */
+ prepare_elf_section_hdr_string(s, buff_hdr);
+ return true;
+}
- ret = fd_write_vmcore(shdr, shdr_size, s);
+static void write_elf_section_headers(DumpState *s, Error **errp)
+{
+ size_t sizeof_shdr = dump_is_64bit(s) ? sizeof(Elf64_Shdr) : sizeof(Elf32_Shdr);
+ int ret;
+
+ if (!prepare_elf_section_hdrs(s, errp)) {
+ return;
+ }
+
+ ret = fd_write_vmcore(s->elf_section_hdrs, s->shdr_num * sizeof_shdr, s);
if (ret < 0) {
- error_setg_errno(errp, -ret,
- "dump: failed to write section header table");
+ error_setg_errno(errp, -ret, "dump: failed to write section headers");
+ }
+
+ g_free(s->elf_section_hdrs);
+}
+
+static void write_elf_sections(DumpState *s, Error **errp)
+{
+ int ret;
+
+ if (s->elf_section_data_size) {
+ /* Write architecture section data */
+ ret = fd_write_vmcore(s->elf_section_data,
+ s->elf_section_data_size, s);
+ if (ret < 0) {
+ error_setg_errno(errp, -ret,
+ "dump: failed to write architecture section data");
+ return;
+ }
+ }
+
+ /* Write string table */
+ ret = fd_write_vmcore(s->string_table_buf->data,
+ s->string_table_buf->len, s);
+ if (ret < 0) {
+ error_setg_errno(errp, -ret, "dump: failed to write string table data");
}
}
@@ -554,6 +661,8 @@ static void dump_begin(DumpState *s, Error **errp)
* --------------
* | elf header |
* --------------
+ * | sctn_hdr |
+ * --------------
* | PT_NOTE |
* --------------
* | PT_LOAD |
@@ -562,8 +671,6 @@ static void dump_begin(DumpState *s, Error **errp)
* --------------
* | PT_LOAD |
* --------------
- * | sec_hdr |
- * --------------
* | elf note |
* --------------
* | memory |
@@ -579,6 +686,12 @@ static void dump_begin(DumpState *s, Error **errp)
return;
}
+ /* write section headers to vmcore */
+ write_elf_section_headers(s, errp);
+ if (*errp) {
+ return;
+ }
+
/* write PT_NOTE to vmcore */
write_elf_phdr_note(s, errp);
if (*errp) {
@@ -591,21 +704,13 @@ static void dump_begin(DumpState *s, Error **errp)
return;
}
- /* write section to vmcore */
- if (s->shdr_num) {
- write_elf_section(s, 1, errp);
- if (*errp) {
- return;
- }
- }
-
/* write notes to vmcore */
write_elf_notes(s, errp);
}
-static int64_t dump_filtered_memblock_size(GuestPhysBlock *block,
- int64_t filter_area_start,
- int64_t filter_area_length)
+int64_t dump_filtered_memblock_size(GuestPhysBlock *block,
+ int64_t filter_area_start,
+ int64_t filter_area_length)
{
int64_t size, left, right;
@@ -623,9 +728,9 @@ static int64_t dump_filtered_memblock_size(GuestPhysBlock *block,
return size;
}
-static int64_t dump_filtered_memblock_start(GuestPhysBlock *block,
- int64_t filter_area_start,
- int64_t filter_area_length)
+int64_t dump_filtered_memblock_start(GuestPhysBlock *block,
+ int64_t filter_area_start,
+ int64_t filter_area_length)
{
if (filter_area_length) {
/* return -1 if the block is not within filter area */
@@ -665,6 +770,31 @@ static void dump_iterate(DumpState *s, Error **errp)
}
}
+static void dump_end(DumpState *s, Error **errp)
+{
+ int rc;
+ ERRP_GUARD();
+
+ if (s->elf_section_data_size) {
+ s->elf_section_data = g_malloc0(s->elf_section_data_size);
+ }
+
+ /* Adds the architecture defined section data to s->elf_section_data */
+ if (s->dump_info.arch_sections_write_fn &&
+ s->elf_section_data_size) {
+ rc = s->dump_info.arch_sections_write_fn(s, s->elf_section_data);
+ if (rc) {
+ error_setg_errno(errp, rc,
+ "dump: failed to get arch section data");
+ g_free(s->elf_section_data);
+ return;
+ }
+ }
+
+ /* write sections to vmcore */
+ write_elf_sections(s, errp);
+}
+
static void create_vmcore(DumpState *s, Error **errp)
{
ERRP_GUARD();
@@ -674,7 +804,14 @@ static void create_vmcore(DumpState *s, Error **errp)
return;
}
+ /* Iterate over memory and dump it to file */
dump_iterate(s, errp);
+ if (*errp) {
+ return;
+ }
+
+ /* Write the section data */
+ dump_end(s, errp);
}
static int write_start_flat_header(int fd)
@@ -1684,6 +1821,14 @@ static void dump_init(DumpState *s, int fd, bool has_format,
s->filter_area_begin = begin;
s->filter_area_length = length;
+ /* First index is 0, it's the special null name */
+ s->string_table_buf = g_array_new(FALSE, TRUE, 1);
+ /*
+ * Allocate the null name, due to the clearing option set to true
+ * it will be 0.
+ */
+ g_array_set_size(s->string_table_buf, 1);
+
memory_mapping_list_init(&s->list);
guest_phys_blocks_init(&s->guest_phys_blocks);
@@ -1820,38 +1965,53 @@ static void dump_init(DumpState *s, int fd, bool has_format,
}
/*
- * calculate phdr_num
+ * The first section header is always a special one in which most
+ * fields are 0. The section header string table is also always
+ * set.
+ */
+ s->shdr_num = 2;
+
+ /*
+ * Adds the number of architecture sections to shdr_num and sets
+ * elf_section_data_size so we know the offsets and sizes of all
+ * parts.
+ */
+ if (s->dump_info.arch_sections_add_fn) {
+ s->dump_info.arch_sections_add_fn(s);
+ }
+
+ /*
+ * calculate shdr_num so we know the offsets and sizes of all
+ * parts.
+ * Calculate phdr_num
*
- * the type of ehdr->e_phnum is uint16_t, so we should avoid overflow
+ * The absolute maximum amount of phdrs is UINT32_MAX - 1 as
+ * sh_info is 32 bit. There's special handling once we go over
+ * UINT16_MAX - 1 but that is handled in the ehdr and section
+ * code.
*/
- s->phdr_num = 1; /* PT_NOTE */
- if (s->list.num < UINT16_MAX - 2) {
- s->shdr_num = 0;
+ s->phdr_num = 1; /* Reserve PT_NOTE */
+ if (s->list.num <= UINT32_MAX - 1) {
s->phdr_num += s->list.num;
} else {
- /* sh_info of section 0 holds the real number of phdrs */
- s->shdr_num = 1;
-
- /* the type of shdr->sh_info is uint32_t, so we should avoid overflow */
- if (s->list.num <= UINT32_MAX - 1) {
- s->phdr_num += s->list.num;
- } else {
- s->phdr_num = UINT32_MAX;
- }
+ s->phdr_num = UINT32_MAX;
}
+ /*
+ * Now that the number of section and program headers is known we
+ * can calculate the offsets of the headers and data.
+ */
if (dump_is_64bit(s)) {
- s->phdr_offset = sizeof(Elf64_Ehdr);
- s->shdr_offset = s->phdr_offset + sizeof(Elf64_Phdr) * s->phdr_num;
- s->note_offset = s->shdr_offset + sizeof(Elf64_Shdr) * s->shdr_num;
- s->memory_offset = s->note_offset + s->note_size;
+ s->shdr_offset = sizeof(Elf64_Ehdr);
+ s->phdr_offset = s->shdr_offset + sizeof(Elf64_Shdr) * s->shdr_num;
+ s->note_offset = s->phdr_offset + sizeof(Elf64_Phdr) * s->phdr_num;
} else {
-
- s->phdr_offset = sizeof(Elf32_Ehdr);
- s->shdr_offset = s->phdr_offset + sizeof(Elf32_Phdr) * s->phdr_num;
- s->note_offset = s->shdr_offset + sizeof(Elf32_Shdr) * s->shdr_num;
- s->memory_offset = s->note_offset + s->note_size;
+ s->shdr_offset = sizeof(Elf32_Ehdr);
+ s->phdr_offset = s->shdr_offset + sizeof(Elf32_Shdr) * s->shdr_num;
+ s->note_offset = s->phdr_offset + sizeof(Elf32_Phdr) * s->phdr_num;
}
+ s->memory_offset = s->note_offset + s->note_size;
+ s->section_offset = s->memory_offset + s->total_size;
return;
diff --git a/dump/win_dump.c b/dump/win_dump.c
index fd91350..f20b605 100644
--- a/dump/win_dump.c
+++ b/dump/win_dump.c
@@ -273,6 +273,13 @@ static void patch_and_save_context(WinDumpHeader *h, bool x64,
uint64_t Context;
WinContext ctx;
+ if (i >= WIN_DUMP_FIELD(NumberProcessors)) {
+ warn_report("win-dump: number of QEMU CPUs is bigger than"
+ " NumberProcessors (%u) in guest Windows",
+ WIN_DUMP_FIELD(NumberProcessors));
+ return;
+ }
+
if (cpu_read_ptr(x64, first_cpu,
KiProcessorBlock + i * win_dump_ptr_size(x64),
&Prcb)) {
diff --git a/hw/s390x/pv.c b/hw/s390x/pv.c
index 401b63d..728ba24 100644
--- a/hw/s390x/pv.c
+++ b/hw/s390x/pv.c
@@ -20,6 +20,11 @@
#include "exec/confidential-guest-support.h"
#include "hw/s390x/ipl.h"
#include "hw/s390x/pv.h"
+#include "target/s390x/kvm/kvm_s390x.h"
+
+static bool info_valid;
+static struct kvm_s390_pv_info_vm info_vm;
+static struct kvm_s390_pv_info_dump info_dump;
static int __s390_pv_cmd(uint32_t cmd, const char *cmdname, void *data)
{
@@ -56,6 +61,42 @@ static int __s390_pv_cmd(uint32_t cmd, const char *cmdname, void *data)
} \
}
+int s390_pv_query_info(void)
+{
+ struct kvm_s390_pv_info info = {
+ .header.id = KVM_PV_INFO_VM,
+ .header.len_max = sizeof(info.header) + sizeof(info.vm),
+ };
+ int rc;
+
+ /* Info API's first user is dump so they are bundled */
+ if (!kvm_s390_get_protected_dump()) {
+ return 0;
+ }
+
+ rc = s390_pv_cmd(KVM_PV_INFO, &info);
+ if (rc) {
+ error_report("KVM PV INFO cmd %x failed: %s",
+ info.header.id, strerror(-rc));
+ return rc;
+ }
+ memcpy(&info_vm, &info.vm, sizeof(info.vm));
+
+ info.header.id = KVM_PV_INFO_DUMP;
+ info.header.len_max = sizeof(info.header) + sizeof(info.dump);
+ rc = s390_pv_cmd(KVM_PV_INFO, &info);
+ if (rc) {
+ error_report("KVM PV INFO cmd %x failed: %s",
+ info.header.id, strerror(-rc));
+ return rc;
+ }
+
+ memcpy(&info_dump, &info.dump, sizeof(info.dump));
+ info_valid = true;
+
+ return rc;
+}
+
int s390_pv_vm_enable(void)
{
return s390_pv_cmd(KVM_PV_ENABLE, NULL);
@@ -114,6 +155,77 @@ void s390_pv_inject_reset_error(CPUState *cs)
env->regs[r1 + 1] = DIAG_308_RC_INVAL_FOR_PV;
}
+uint64_t kvm_s390_pv_dmp_get_size_cpu(void)
+{
+ return info_dump.dump_cpu_buffer_len;
+}
+
+uint64_t kvm_s390_pv_dmp_get_size_completion_data(void)
+{
+ return info_dump.dump_config_finalize_len;
+}
+
+uint64_t kvm_s390_pv_dmp_get_size_mem_state(void)
+{
+ return info_dump.dump_config_mem_buffer_per_1m;
+}
+
+bool kvm_s390_pv_info_basic_valid(void)
+{
+ return info_valid;
+}
+
+static int s390_pv_dump_cmd(uint64_t subcmd, uint64_t uaddr, uint64_t gaddr,
+ uint64_t len)
+{
+ struct kvm_s390_pv_dmp dmp = {
+ .subcmd = subcmd,
+ .buff_addr = uaddr,
+ .buff_len = len,
+ .gaddr = gaddr,
+ };
+ int ret;
+
+ ret = s390_pv_cmd(KVM_PV_DUMP, (void *)&dmp);
+ if (ret) {
+ error_report("KVM DUMP command %ld failed", subcmd);
+ }
+ return ret;
+}
+
+int kvm_s390_dump_cpu(S390CPU *cpu, void *buff)
+{
+ struct kvm_s390_pv_dmp dmp = {
+ .subcmd = KVM_PV_DUMP_CPU,
+ .buff_addr = (uint64_t)buff,
+ .gaddr = 0,
+ .buff_len = info_dump.dump_cpu_buffer_len,
+ };
+ struct kvm_pv_cmd pv = {
+ .cmd = KVM_PV_DUMP,
+ .data = (uint64_t)&dmp,
+ };
+
+ return kvm_vcpu_ioctl(CPU(cpu), KVM_S390_PV_CPU_COMMAND, &pv);
+}
+
+int kvm_s390_dump_init(void)
+{
+ return s390_pv_dump_cmd(KVM_PV_DUMP_INIT, 0, 0, 0);
+}
+
+int kvm_s390_dump_mem_state(uint64_t gaddr, size_t len, void *dest)
+{
+ return s390_pv_dump_cmd(KVM_PV_DUMP_CONFIG_STOR_STATE, (uint64_t)dest,
+ gaddr, len);
+}
+
+int kvm_s390_dump_completion_data(void *buff)
+{
+ return s390_pv_dump_cmd(KVM_PV_DUMP_COMPLETE, (uint64_t)buff, 0,
+ info_dump.dump_config_finalize_len);
+}
+
#define TYPE_S390_PV_GUEST "s390-pv-guest"
OBJECT_DECLARE_SIMPLE_TYPE(S390PVGuest, S390_PV_GUEST)
diff --git a/hw/s390x/s390-virtio-ccw.c b/hw/s390x/s390-virtio-ccw.c
index 03855c7..1cc20d8 100644
--- a/hw/s390x/s390-virtio-ccw.c
+++ b/hw/s390x/s390-virtio-ccw.c
@@ -366,6 +366,12 @@ static int s390_machine_protect(S390CcwMachineState *ms)
ms->pv = true;
+ /* Will return 0 if API is not available since it's not vital */
+ rc = s390_pv_query_info();
+ if (rc) {
+ goto out_err;
+ }
+
/* Set SE header and unpack */
rc = s390_ipl_prepare_pv_header();
if (rc) {
diff --git a/include/elf.h b/include/elf.h
index 3d6b906..8bf1e72 100644
--- a/include/elf.h
+++ b/include/elf.h
@@ -1650,6 +1650,8 @@ typedef struct elf64_shdr {
#define NT_TASKSTRUCT 4
#define NT_AUXV 6
#define NT_PRXFPREG 0x46e62b7f /* copied from gdb5.1/include/elf/common.h */
+#define NT_S390_PV_CPU_DATA 0x30e /* s390 protvirt cpu dump data */
+#define NT_S390_RI_CB 0x30d /* s390 runtime instrumentation */
#define NT_S390_GS_CB 0x30b /* s390 guarded storage registers */
#define NT_S390_VXRS_HIGH 0x30a /* s390 vector registers 16-31 */
#define NT_S390_VXRS_LOW 0x309 /* s390 vector registers 0-15 (lower half) */
diff --git a/include/hw/s390x/pv.h b/include/hw/s390x/pv.h
index 1f1f545..9360aa1 100644
--- a/include/hw/s390x/pv.h
+++ b/include/hw/s390x/pv.h
@@ -38,6 +38,7 @@ static inline bool s390_is_pv(void)
return ccw->pv;
}
+int s390_pv_query_info(void);
int s390_pv_vm_enable(void);
void s390_pv_vm_disable(void);
int s390_pv_set_sec_parms(uint64_t origin, uint64_t length);
@@ -46,8 +47,17 @@ void s390_pv_prep_reset(void);
int s390_pv_verify(void);
void s390_pv_unshare(void);
void s390_pv_inject_reset_error(CPUState *cs);
+uint64_t kvm_s390_pv_dmp_get_size_cpu(void);
+uint64_t kvm_s390_pv_dmp_get_size_mem_state(void);
+uint64_t kvm_s390_pv_dmp_get_size_completion_data(void);
+bool kvm_s390_pv_info_basic_valid(void);
+int kvm_s390_dump_init(void);
+int kvm_s390_dump_cpu(S390CPU *cpu, void *buff);
+int kvm_s390_dump_mem_state(uint64_t addr, size_t len, void *dest);
+int kvm_s390_dump_completion_data(void *buff);
#else /* CONFIG_KVM */
static inline bool s390_is_pv(void) { return false; }
+static inline int s390_pv_query_info(void) { return 0; }
static inline int s390_pv_vm_enable(void) { return 0; }
static inline void s390_pv_vm_disable(void) {}
static inline int s390_pv_set_sec_parms(uint64_t origin, uint64_t length) { return 0; }
@@ -56,6 +66,15 @@ static inline void s390_pv_prep_reset(void) {}
static inline int s390_pv_verify(void) { return 0; }
static inline void s390_pv_unshare(void) {}
static inline void s390_pv_inject_reset_error(CPUState *cs) {};
+static inline uint64_t kvm_s390_pv_dmp_get_size_cpu(void) { return 0; }
+static inline uint64_t kvm_s390_pv_dmp_get_size_mem_state(void) { return 0; }
+static inline uint64_t kvm_s390_pv_dmp_get_size_completion_data(void) { return 0; }
+static inline bool kvm_s390_pv_info_basic_valid(void) { return false; }
+static inline int kvm_s390_dump_init(void) { return 0; }
+static inline int kvm_s390_dump_cpu(S390CPU *cpu, void *buff) { return 0; }
+static inline int kvm_s390_dump_mem_state(uint64_t addr, size_t len,
+ void *dest) { return 0; }
+static inline int kvm_s390_dump_completion_data(void *buff) { return 0; }
#endif /* CONFIG_KVM */
int s390_pv_kvm_init(ConfidentialGuestSupport *cgs, Error **errp);
diff --git a/include/sysemu/dump-arch.h b/include/sysemu/dump-arch.h
index e25b02e..59bbc9b 100644
--- a/include/sysemu/dump-arch.h
+++ b/include/sysemu/dump-arch.h
@@ -21,6 +21,9 @@ typedef struct ArchDumpInfo {
uint32_t page_size; /* The target's page size. If it's variable and
* unknown, then this should be the maximum. */
uint64_t phys_base; /* The target's physmem base. */
+ void (*arch_sections_add_fn)(DumpState *s);
+ uint64_t (*arch_sections_write_hdr_fn)(DumpState *s, uint8_t *buff);
+ int (*arch_sections_write_fn)(DumpState *s, uint8_t *buff);
} ArchDumpInfo;
struct GuestPhysBlockList; /* memory_mapping.h */
diff --git a/include/sysemu/dump.h b/include/sysemu/dump.h
index b62513d..4ffed0b 100644
--- a/include/sysemu/dump.h
+++ b/include/sysemu/dump.h
@@ -154,15 +154,8 @@ typedef struct DumpState {
GuestPhysBlockList guest_phys_blocks;
ArchDumpInfo dump_info;
MemoryMappingList list;
- uint32_t phdr_num;
- uint32_t shdr_num;
bool resume;
bool detached;
- ssize_t note_size;
- hwaddr shdr_offset;
- hwaddr phdr_offset;
- hwaddr section_offset;
- hwaddr note_offset;
hwaddr memory_offset;
int fd;
@@ -177,6 +170,20 @@ typedef struct DumpState {
int64_t filter_area_begin; /* Start address of partial guest memory area */
int64_t filter_area_length; /* Length of partial guest memory area */
+ /* Elf dump related data */
+ uint32_t phdr_num;
+ uint32_t shdr_num;
+ ssize_t note_size;
+ hwaddr shdr_offset;
+ hwaddr phdr_offset;
+ hwaddr section_offset;
+ hwaddr note_offset;
+
+ void *elf_section_hdrs; /* Pointer to section header buffer */
+ void *elf_section_data; /* Pointer to section data buffer */
+ uint64_t elf_section_data_size; /* Size of section data */
+ GArray *string_table_buf; /* String table data buffer */
+
uint8_t *note_buf; /* buffer for notes */
size_t note_buf_offset; /* the writing place in note_buf */
uint32_t nr_cpus; /* number of guest's cpu */
@@ -208,4 +215,9 @@ typedef struct DumpState {
uint16_t cpu_to_dump16(DumpState *s, uint16_t val);
uint32_t cpu_to_dump32(DumpState *s, uint32_t val);
uint64_t cpu_to_dump64(DumpState *s, uint64_t val);
+
+int64_t dump_filtered_memblock_size(GuestPhysBlock *block, int64_t filter_area_start,
+ int64_t filter_area_length);
+int64_t dump_filtered_memblock_start(GuestPhysBlock *block, int64_t filter_area_start,
+ int64_t filter_area_length);
#endif
diff --git a/target/s390x/arch_dump.c b/target/s390x/arch_dump.c
index f60a149..a232914 100644
--- a/target/s390x/arch_dump.c
+++ b/target/s390x/arch_dump.c
@@ -12,11 +12,13 @@
*/
#include "qemu/osdep.h"
+#include "qemu/units.h"
#include "cpu.h"
#include "s390x-internal.h"
#include "elf.h"
#include "sysemu/dump.h"
-
+#include "hw/s390x/pv.h"
+#include "kvm/kvm_s390x.h"
struct S390xUserRegsStruct {
uint64_t psw[2];
@@ -76,9 +78,16 @@ typedef struct noteStruct {
uint64_t todcmp;
uint32_t todpreg;
uint64_t ctrs[16];
+ uint8_t dynamic[1]; /*
+ * Would be a flexible array member, if
+ * that was legal inside a union. Real
+ * size comes from PV info interface.
+ */
} contents;
} QEMU_PACKED Note;
+static bool pv_dump_initialized;
+
static void s390x_write_elf64_prstatus(Note *note, S390CPU *cpu, int id)
{
int i;
@@ -177,28 +186,39 @@ static void s390x_write_elf64_prefix(Note *note, S390CPU *cpu, int id)
note->contents.prefix = cpu_to_be32((uint32_t)(cpu->env.psa));
}
+static void s390x_write_elf64_pv(Note *note, S390CPU *cpu, int id)
+{
+ note->hdr.n_type = cpu_to_be32(NT_S390_PV_CPU_DATA);
+ if (!pv_dump_initialized) {
+ return;
+ }
+ kvm_s390_dump_cpu(cpu, &note->contents.dynamic);
+}
typedef struct NoteFuncDescStruct {
int contents_size;
+ uint64_t (*note_size_func)(void); /* NULL for non-dynamic sized contents */
void (*note_contents_func)(Note *note, S390CPU *cpu, int id);
+ bool pvonly;
} NoteFuncDesc;
static const NoteFuncDesc note_core[] = {
- {sizeof_field(Note, contents.prstatus), s390x_write_elf64_prstatus},
- {sizeof_field(Note, contents.fpregset), s390x_write_elf64_fpregset},
- { 0, NULL}
+ {sizeof_field(Note, contents.prstatus), NULL, s390x_write_elf64_prstatus, false},
+ {sizeof_field(Note, contents.fpregset), NULL, s390x_write_elf64_fpregset, false},
+ { 0, NULL, NULL, false}
};
static const NoteFuncDesc note_linux[] = {
- {sizeof_field(Note, contents.prefix), s390x_write_elf64_prefix},
- {sizeof_field(Note, contents.ctrs), s390x_write_elf64_ctrs},
- {sizeof_field(Note, contents.timer), s390x_write_elf64_timer},
- {sizeof_field(Note, contents.todcmp), s390x_write_elf64_todcmp},
- {sizeof_field(Note, contents.todpreg), s390x_write_elf64_todpreg},
- {sizeof_field(Note, contents.vregslo), s390x_write_elf64_vregslo},
- {sizeof_field(Note, contents.vregshi), s390x_write_elf64_vregshi},
- {sizeof_field(Note, contents.gscb), s390x_write_elf64_gscb},
- { 0, NULL}
+ {sizeof_field(Note, contents.prefix), NULL, s390x_write_elf64_prefix, false},
+ {sizeof_field(Note, contents.ctrs), NULL, s390x_write_elf64_ctrs, false},
+ {sizeof_field(Note, contents.timer), NULL, s390x_write_elf64_timer, false},
+ {sizeof_field(Note, contents.todcmp), NULL, s390x_write_elf64_todcmp, false},
+ {sizeof_field(Note, contents.todpreg), NULL, s390x_write_elf64_todpreg, false},
+ {sizeof_field(Note, contents.vregslo), NULL, s390x_write_elf64_vregslo, false},
+ {sizeof_field(Note, contents.vregshi), NULL, s390x_write_elf64_vregshi, false},
+ {sizeof_field(Note, contents.gscb), NULL, s390x_write_elf64_gscb, false},
+ {0, kvm_s390_pv_dmp_get_size_cpu, s390x_write_elf64_pv, true},
+ { 0, NULL, NULL, false}
};
static int s390x_write_elf64_notes(const char *note_name,
@@ -207,22 +227,41 @@ static int s390x_write_elf64_notes(const char *note_name,
DumpState *s,
const NoteFuncDesc *funcs)
{
- Note note;
+ Note note, *notep;
const NoteFuncDesc *nf;
- int note_size;
+ int note_size, content_size;
int ret = -1;
assert(strlen(note_name) < sizeof(note.name));
for (nf = funcs; nf->note_contents_func; nf++) {
- memset(&note, 0, sizeof(note));
- note.hdr.n_namesz = cpu_to_be32(strlen(note_name) + 1);
- note.hdr.n_descsz = cpu_to_be32(nf->contents_size);
- g_strlcpy(note.name, note_name, sizeof(note.name));
- (*nf->note_contents_func)(&note, cpu, id);
+ notep = &note;
+ if (nf->pvonly && !s390_is_pv()) {
+ continue;
+ }
+
+ content_size = nf->note_size_func ? nf->note_size_func() : nf->contents_size;
+ note_size = sizeof(note) - sizeof(notep->contents) + content_size;
+
+ /* Notes with dynamic sizes need to allocate a note */
+ if (nf->note_size_func) {
+ notep = g_malloc(note_size);
+ }
+
+ memset(notep, 0, sizeof(note));
- note_size = sizeof(note) - sizeof(note.contents) + nf->contents_size;
- ret = f(&note, note_size, s);
+ /* Setup note header data */
+ notep->hdr.n_descsz = cpu_to_be32(content_size);
+ notep->hdr.n_namesz = cpu_to_be32(strlen(note_name) + 1);
+ g_strlcpy(notep->name, note_name, sizeof(notep->name));
+
+ /* Get contents and write them out */
+ (*nf->note_contents_func)(notep, cpu, id);
+ ret = f(notep, note_size, s);
+
+ if (nf->note_size_func) {
+ g_free(notep);
+ }
if (ret < 0) {
return -1;
@@ -247,13 +286,179 @@ int s390_cpu_write_elf64_note(WriteCoreDumpFunction f, CPUState *cs,
return s390x_write_elf64_notes("LINUX", f, cpu, cpuid, s, note_linux);
}
+/* PV dump section size functions */
+static uint64_t get_mem_state_size_from_len(uint64_t len)
+{
+ return (len / (MiB)) * kvm_s390_pv_dmp_get_size_mem_state();
+}
+
+static uint64_t get_size_mem_state(DumpState *s)
+{
+ return get_mem_state_size_from_len(s->total_size);
+}
+
+static uint64_t get_size_completion_data(DumpState *s)
+{
+ return kvm_s390_pv_dmp_get_size_completion_data();
+}
+
+/* PV dump section data functions*/
+static int get_data_completion(DumpState *s, uint8_t *buff)
+{
+ int rc;
+
+ if (!pv_dump_initialized) {
+ return 0;
+ }
+ rc = kvm_s390_dump_completion_data(buff);
+ if (!rc) {
+ pv_dump_initialized = false;
+ }
+ return rc;
+}
+
+static int get_mem_state(DumpState *s, uint8_t *buff)
+{
+ int64_t memblock_size, memblock_start;
+ GuestPhysBlock *block;
+ uint64_t off;
+ int rc;
+
+ QTAILQ_FOREACH(block, &s->guest_phys_blocks.head, next) {
+ memblock_start = dump_filtered_memblock_start(block, s->filter_area_begin,
+ s->filter_area_length);
+ if (memblock_start == -1) {
+ continue;
+ }
+
+ memblock_size = dump_filtered_memblock_size(block, s->filter_area_begin,
+ s->filter_area_length);
+
+ off = get_mem_state_size_from_len(block->target_start);
+
+ rc = kvm_s390_dump_mem_state(block->target_start,
+ get_mem_state_size_from_len(memblock_size),
+ buff + off);
+ if (rc) {
+ return rc;
+ }
+ }
+
+ return 0;
+}
+
+static struct sections {
+ uint64_t (*sections_size_func)(DumpState *s);
+ int (*sections_contents_func)(DumpState *s, uint8_t *buff);
+ char sctn_str[12];
+} sections[] = {
+ { get_size_mem_state, get_mem_state, "pv_mem_meta"},
+ { get_size_completion_data, get_data_completion, "pv_compl"},
+ {NULL , NULL, ""}
+};
+
+static uint64_t arch_sections_write_hdr(DumpState *s, uint8_t *buff)
+{
+ Elf64_Shdr *shdr = (void *)buff;
+ struct sections *sctn = sections;
+ uint64_t off = s->section_offset;
+
+ if (!pv_dump_initialized) {
+ return 0;
+ }
+
+ for (; sctn->sections_size_func; off += shdr->sh_size, sctn++, shdr++) {
+ memset(shdr, 0, sizeof(*shdr));
+ shdr->sh_type = SHT_PROGBITS;
+ shdr->sh_offset = off;
+ shdr->sh_size = sctn->sections_size_func(s);
+ shdr->sh_name = s->string_table_buf->len;
+ g_array_append_vals(s->string_table_buf, sctn->sctn_str, sizeof(sctn->sctn_str));
+ }
+
+ return (uintptr_t)shdr - (uintptr_t)buff;
+}
+
+
+/* Add arch specific number of sections and their respective sizes */
+static void arch_sections_add(DumpState *s)
+{
+ struct sections *sctn = sections;
+
+ /*
+ * We only do a PV dump if we are running a PV guest, KVM supports
+ * the dump API and we got valid dump length information.
+ */
+ if (!s390_is_pv() || !kvm_s390_get_protected_dump() ||
+ !kvm_s390_pv_info_basic_valid()) {
+ return;
+ }
+
+ /*
+ * Start the UV dump process by doing the initialize dump call via
+ * KVM as the proxy.
+ */
+ if (!kvm_s390_dump_init()) {
+ pv_dump_initialized = true;
+ } else {
+ /*
+ * Dump init failed, maybe the guest owner disabled dumping.
+ * We'll continue the non-PV dump process since this is no
+ * reason to crash qemu.
+ */
+ return;
+ }
+
+ for (; sctn->sections_size_func; sctn++) {
+ s->shdr_num += 1;
+ s->elf_section_data_size += sctn->sections_size_func(s);
+ }
+}
+
+/*
+ * After the PV dump has been initialized, the CPU data has been
+ * fetched and memory has been dumped, we need to grab the tweak data
+ * and the completion data.
+ */
+static int arch_sections_write(DumpState *s, uint8_t *buff)
+{
+ struct sections *sctn = sections;
+ int rc;
+
+ if (!pv_dump_initialized) {
+ return -EINVAL;
+ }
+
+ for (; sctn->sections_size_func; sctn++) {
+ rc = sctn->sections_contents_func(s, buff);
+ buff += sctn->sections_size_func(s);
+ if (rc) {
+ return rc;
+ }
+ }
+ return 0;
+}
+
int cpu_get_dump_info(ArchDumpInfo *info,
const struct GuestPhysBlockList *guest_phys_blocks)
{
info->d_machine = EM_S390;
info->d_endian = ELFDATA2MSB;
info->d_class = ELFCLASS64;
-
+ /*
+ * This is evaluated for each dump so we can freely switch
+ * between PV and non-PV.
+ */
+ if (s390_is_pv() && kvm_s390_get_protected_dump() &&
+ kvm_s390_pv_info_basic_valid()) {
+ info->arch_sections_add_fn = *arch_sections_add;
+ info->arch_sections_write_hdr_fn = *arch_sections_write_hdr;
+ info->arch_sections_write_fn = *arch_sections_write;
+ } else {
+ info->arch_sections_add_fn = NULL;
+ info->arch_sections_write_hdr_fn = NULL;
+ info->arch_sections_write_fn = NULL;
+ }
return 0;
}
@@ -261,7 +466,7 @@ ssize_t cpu_get_note_size(int class, int machine, int nr_cpus)
{
int name_size = 8; /* "LINUX" or "CORE" + pad */
size_t elf_note_size = 0;
- int note_head_size;
+ int note_head_size, content_size;
const NoteFuncDesc *nf;
assert(class == ELFCLASS64);
@@ -270,12 +475,15 @@ ssize_t cpu_get_note_size(int class, int machine, int nr_cpus)
note_head_size = sizeof(Elf64_Nhdr);
for (nf = note_core; nf->note_contents_func; nf++) {
- elf_note_size = elf_note_size + note_head_size + name_size +
- nf->contents_size;
+ elf_note_size = elf_note_size + note_head_size + name_size + nf->contents_size;
}
for (nf = note_linux; nf->note_contents_func; nf++) {
+ if (nf->pvonly && !s390_is_pv()) {
+ continue;
+ }
+ content_size = nf->contents_size ? nf->contents_size : nf->note_size_func();
elf_note_size = elf_note_size + note_head_size + name_size +
- nf->contents_size;
+ content_size;
}
return (elf_note_size) * nr_cpus;
diff --git a/target/s390x/kvm/kvm.c b/target/s390x/kvm/kvm.c
index da8c47f..3ac7ec9 100644
--- a/target/s390x/kvm/kvm.c
+++ b/target/s390x/kvm/kvm.c
@@ -158,6 +158,7 @@ static int cap_hpage_1m;
static int cap_vcpu_resets;
static int cap_protected;
static int cap_zpci_op;
+static int cap_protected_dump;
static bool mem_op_storage_key_support;
@@ -364,6 +365,7 @@ int kvm_arch_init(MachineState *ms, KVMState *s)
cap_vcpu_resets = kvm_check_extension(s, KVM_CAP_S390_VCPU_RESETS);
cap_protected = kvm_check_extension(s, KVM_CAP_S390_PROTECTED);
cap_zpci_op = kvm_check_extension(s, KVM_CAP_S390_ZPCI_OP);
+ cap_protected_dump = kvm_check_extension(s, KVM_CAP_S390_PROTECTED_DUMP);
kvm_vm_enable_cap(s, KVM_CAP_S390_USER_SIGP, 0);
kvm_vm_enable_cap(s, KVM_CAP_S390_VECTOR_REGISTERS, 0);
@@ -2045,6 +2047,11 @@ int kvm_s390_assign_subch_ioeventfd(EventNotifier *notifier, uint32_t sch,
return kvm_vm_ioctl(kvm_state, KVM_IOEVENTFD, &kick);
}
+int kvm_s390_get_protected_dump(void)
+{
+ return cap_protected_dump;
+}
+
int kvm_s390_get_ri(void)
{
return cap_ri;
diff --git a/target/s390x/kvm/kvm_s390x.h b/target/s390x/kvm/kvm_s390x.h
index aaae857..f978556 100644
--- a/target/s390x/kvm/kvm_s390x.h
+++ b/target/s390x/kvm/kvm_s390x.h
@@ -26,6 +26,7 @@ int kvm_s390_set_cpu_state(S390CPU *cpu, uint8_t cpu_state);
void kvm_s390_vcpu_interrupt_pre_save(S390CPU *cpu);
int kvm_s390_vcpu_interrupt_post_load(S390CPU *cpu);
int kvm_s390_get_hpage_1m(void);
+int kvm_s390_get_protected_dump(void);
int kvm_s390_get_ri(void);
int kvm_s390_get_zpci_op(void);
int kvm_s390_get_clock(uint8_t *tod_high, uint64_t *tod_clock);
diff --git a/target/s390x/kvm/meson.build b/target/s390x/kvm/meson.build
index d135635..aef52b6 100644
--- a/target/s390x/kvm/meson.build
+++ b/target/s390x/kvm/meson.build
@@ -1,6 +1,8 @@
s390x_ss.add(when: 'CONFIG_KVM', if_true: files(
'kvm.c'
+), if_false: files(
+ 'stubs.c'
))
# Newer kernels on s390 check for an S390_PGSTE program header and
diff --git a/target/s390x/kvm/stubs.c b/target/s390x/kvm/stubs.c
new file mode 100644
index 0000000..5fd63b9
--- /dev/null
+++ b/target/s390x/kvm/stubs.c
@@ -0,0 +1,12 @@
+/*
+ * SPDX-License-Identifier: GPL-2.0-or-later
+ */
+
+#include "qemu/osdep.h"
+
+#include "kvm_s390x.h"
+
+int kvm_s390_get_protected_dump(void)
+{
+ return false;
+}
generated by cgit v1.1 at 2024-07-19 05:08:26 +0000