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-rw-r--r--xen-all.c234
1 files changed, 128 insertions, 106 deletions
diff --git a/xen-all.c b/xen-all.c
index f76b051eee..5ca0c26c63 100644
--- a/xen-all.c
+++ b/xen-all.c
@@ -10,15 +10,17 @@
#include <sys/mman.h>
-#include "hw/pci.h"
-#include "hw/pc.h"
-#include "hw/xen_common.h"
-#include "hw/xen_backend.h"
-
-#include "range.h"
-#include "xen-mapcache.h"
+#include "hw/pci/pci.h"
+#include "hw/i386/pc.h"
+#include "hw/xen/xen_common.h"
+#include "hw/xen/xen_backend.h"
+#include "qmp-commands.h"
+
+#include "sysemu/char.h"
+#include "qemu/range.h"
+#include "sysemu/xen-mapcache.h"
#include "trace.h"
-#include "exec-memory.h"
+#include "exec/address-spaces.h"
#include <xen/hvm/ioreq.h>
#include <xen/hvm/params.h>
@@ -36,6 +38,7 @@
static MemoryRegion ram_memory, ram_640k, ram_lo, ram_hi;
static MemoryRegion *framebuffer;
+static bool xen_in_migration;
/* Compatibility with older version */
#if __XEN_LATEST_INTERFACE_VERSION__ < 0x0003020a
@@ -66,10 +69,10 @@ static inline ioreq_t *xen_vcpu_ioreq(shared_iopage_t *shared_page, int vcpu)
#define BUFFER_IO_MAX_DELAY 100
typedef struct XenPhysmap {
- target_phys_addr_t start_addr;
+ hwaddr start_addr;
ram_addr_t size;
char *name;
- target_phys_addr_t phys_offset;
+ hwaddr phys_offset;
QLIST_ENTRY(XenPhysmap) list;
} XenPhysmap;
@@ -90,7 +93,7 @@ typedef struct XenIOState {
struct xs_handle *xenstore;
MemoryListener memory_listener;
QLIST_HEAD(, XenPhysmap) physmap;
- target_phys_addr_t free_phys_offset;
+ hwaddr free_phys_offset;
const XenPhysmap *log_for_dirtybit;
Notifier exit;
@@ -158,18 +161,18 @@ static void xen_ram_init(ram_addr_t ram_size)
ram_addr_t block_len;
block_len = ram_size;
- if (ram_size >= HVM_BELOW_4G_RAM_END) {
+ if (ram_size >= QEMU_BELOW_4G_RAM_END) {
/* Xen does not allocate the memory continuously, and keep a hole at
- * HVM_BELOW_4G_MMIO_START of HVM_BELOW_4G_MMIO_LENGTH
+ * QEMU_BELOW_4G_RAM_END of QEMU_BELOW_4G_MMIO_LENGTH
*/
- block_len += HVM_BELOW_4G_MMIO_LENGTH;
+ block_len += QEMU_BELOW_4G_MMIO_LENGTH;
}
memory_region_init_ram(&ram_memory, "xen.ram", block_len);
vmstate_register_ram_global(&ram_memory);
- if (ram_size >= HVM_BELOW_4G_RAM_END) {
- above_4g_mem_size = ram_size - HVM_BELOW_4G_RAM_END;
- below_4g_mem_size = HVM_BELOW_4G_RAM_END;
+ if (ram_size >= QEMU_BELOW_4G_RAM_END) {
+ above_4g_mem_size = ram_size - QEMU_BELOW_4G_RAM_END;
+ below_4g_mem_size = QEMU_BELOW_4G_RAM_END;
} else {
below_4g_mem_size = ram_size;
}
@@ -229,7 +232,7 @@ void xen_ram_alloc(ram_addr_t ram_addr, ram_addr_t size, MemoryRegion *mr)
}
static XenPhysmap *get_physmapping(XenIOState *state,
- target_phys_addr_t start_addr, ram_addr_t size)
+ hwaddr start_addr, ram_addr_t size)
{
XenPhysmap *physmap = NULL;
@@ -243,10 +246,10 @@ static XenPhysmap *get_physmapping(XenIOState *state,
return NULL;
}
-static target_phys_addr_t xen_phys_offset_to_gaddr(target_phys_addr_t start_addr,
+static hwaddr xen_phys_offset_to_gaddr(hwaddr start_addr,
ram_addr_t size, void *opaque)
{
- target_phys_addr_t addr = start_addr & TARGET_PAGE_MASK;
+ hwaddr addr = start_addr & TARGET_PAGE_MASK;
XenIOState *xen_io_state = opaque;
XenPhysmap *physmap = NULL;
@@ -261,16 +264,16 @@ static target_phys_addr_t xen_phys_offset_to_gaddr(target_phys_addr_t start_addr
#if CONFIG_XEN_CTRL_INTERFACE_VERSION >= 340
static int xen_add_to_physmap(XenIOState *state,
- target_phys_addr_t start_addr,
+ hwaddr start_addr,
ram_addr_t size,
MemoryRegion *mr,
- target_phys_addr_t offset_within_region)
+ hwaddr offset_within_region)
{
unsigned long i = 0;
int rc = 0;
XenPhysmap *physmap = NULL;
- target_phys_addr_t pfn, start_gpfn;
- target_phys_addr_t phys_offset = memory_region_get_ram_addr(mr);
+ hwaddr pfn, start_gpfn;
+ hwaddr phys_offset = memory_region_get_ram_addr(mr);
char path[80], value[17];
if (get_physmapping(state, start_addr, size)) {
@@ -290,7 +293,8 @@ static int xen_add_to_physmap(XenIOState *state,
return -1;
go_physmap:
- DPRINTF("mapping vram to %llx - %llx\n", start_addr, start_addr + size);
+ DPRINTF("mapping vram to %"HWADDR_PRIx" - %"HWADDR_PRIx"\n",
+ start_addr, start_addr + size);
pfn = phys_offset >> TARGET_PAGE_BITS;
start_gpfn = start_addr >> TARGET_PAGE_BITS;
@@ -347,13 +351,13 @@ go_physmap:
}
static int xen_remove_from_physmap(XenIOState *state,
- target_phys_addr_t start_addr,
+ hwaddr start_addr,
ram_addr_t size)
{
unsigned long i = 0;
int rc = 0;
XenPhysmap *physmap = NULL;
- target_phys_addr_t phys_offset = 0;
+ hwaddr phys_offset = 0;
physmap = get_physmapping(state, start_addr, size);
if (physmap == NULL) {
@@ -363,8 +367,8 @@ static int xen_remove_from_physmap(XenIOState *state,
phys_offset = physmap->phys_offset;
size = physmap->size;
- DPRINTF("unmapping vram to %llx - %llx, from %llx\n",
- phys_offset, phys_offset + size, start_addr);
+ DPRINTF("unmapping vram to %"HWADDR_PRIx" - %"HWADDR_PRIx", from ",
+ "%"HWADDR_PRIx"\n", phys_offset, phys_offset + size, start_addr);
size >>= TARGET_PAGE_BITS;
start_addr >>= TARGET_PAGE_BITS;
@@ -392,16 +396,16 @@ static int xen_remove_from_physmap(XenIOState *state,
#else
static int xen_add_to_physmap(XenIOState *state,
- target_phys_addr_t start_addr,
+ hwaddr start_addr,
ram_addr_t size,
MemoryRegion *mr,
- target_phys_addr_t offset_within_region)
+ hwaddr offset_within_region)
{
return -ENOSYS;
}
static int xen_remove_from_physmap(XenIOState *state,
- target_phys_addr_t start_addr,
+ hwaddr start_addr,
ram_addr_t size)
{
return -ENOSYS;
@@ -413,7 +417,7 @@ static void xen_set_memory(struct MemoryListener *listener,
bool add)
{
XenIOState *state = container_of(listener, XenIOState, memory_listener);
- target_phys_addr_t start_addr = section->offset_within_address_space;
+ hwaddr start_addr = section->offset_within_address_space;
ram_addr_t size = section->size;
bool log_dirty = memory_region_is_logging(section->mr);
hvmmem_type_t mem_type;
@@ -452,14 +456,6 @@ static void xen_set_memory(struct MemoryListener *listener,
}
}
-static void xen_begin(MemoryListener *listener)
-{
-}
-
-static void xen_commit(MemoryListener *listener)
-{
-}
-
static void xen_region_add(MemoryListener *listener,
MemoryRegionSection *section)
{
@@ -472,16 +468,11 @@ static void xen_region_del(MemoryListener *listener,
xen_set_memory(listener, section, false);
}
-static void xen_region_nop(MemoryListener *listener,
- MemoryRegionSection *section)
-{
-}
-
static void xen_sync_dirty_bitmap(XenIOState *state,
- target_phys_addr_t start_addr,
+ hwaddr start_addr,
ram_addr_t size)
{
- target_phys_addr_t npages = size >> TARGET_PAGE_BITS;
+ hwaddr npages = size >> TARGET_PAGE_BITS;
const int width = sizeof(unsigned long) * 8;
unsigned long bitmap[(npages + width - 1) / width];
int rc, i, j;
@@ -505,7 +496,8 @@ static void xen_sync_dirty_bitmap(XenIOState *state,
bitmap);
if (rc < 0) {
if (rc != -ENODATA) {
- fprintf(stderr, "xen: track_dirty_vram failed (0x" TARGET_FMT_plx
+ memory_region_set_dirty(framebuffer, 0, size);
+ DPRINTF("xen: track_dirty_vram failed (0x" TARGET_FMT_plx
", 0x" TARGET_FMT_plx "): %s\n",
start_addr, start_addr + size, strerror(-rc));
}
@@ -552,58 +544,52 @@ static void xen_log_sync(MemoryListener *listener, MemoryRegionSection *section)
static void xen_log_global_start(MemoryListener *listener)
{
+ if (xen_enabled()) {
+ xen_in_migration = true;
+ }
}
static void xen_log_global_stop(MemoryListener *listener)
{
-}
-
-static void xen_eventfd_add(MemoryListener *listener,
- MemoryRegionSection *section,
- bool match_data, uint64_t data,
- EventNotifier *e)
-{
-}
-
-static void xen_eventfd_del(MemoryListener *listener,
- MemoryRegionSection *section,
- bool match_data, uint64_t data,
- EventNotifier *e)
-{
+ xen_in_migration = false;
}
static MemoryListener xen_memory_listener = {
- .begin = xen_begin,
- .commit = xen_commit,
.region_add = xen_region_add,
.region_del = xen_region_del,
- .region_nop = xen_region_nop,
.log_start = xen_log_start,
.log_stop = xen_log_stop,
.log_sync = xen_log_sync,
.log_global_start = xen_log_global_start,
.log_global_stop = xen_log_global_stop,
- .eventfd_add = xen_eventfd_add,
- .eventfd_del = xen_eventfd_del,
.priority = 10,
};
+void qmp_xen_set_global_dirty_log(bool enable, Error **errp)
+{
+ if (enable) {
+ memory_global_dirty_log_start();
+ } else {
+ memory_global_dirty_log_stop();
+ }
+}
+
/* VCPU Operations, MMIO, IO ring ... */
static void xen_reset_vcpu(void *opaque)
{
- CPUArchState *env = opaque;
+ CPUState *cpu = opaque;
- env->halted = 1;
+ cpu->halted = 1;
}
void xen_vcpu_init(void)
{
- CPUArchState *first_cpu;
+ if (first_cpu != NULL) {
+ CPUState *cpu = ENV_GET_CPU(first_cpu);
- if ((first_cpu = qemu_get_cpu(0))) {
- qemu_register_reset(xen_reset_vcpu, first_cpu);
- xen_reset_vcpu(first_cpu);
+ qemu_register_reset(xen_reset_vcpu, cpu);
+ xen_reset_vcpu(cpu);
}
/* if rtc_clock is left to default (host_clock), disable it */
if (rtc_clock == host_clock) {
@@ -698,11 +684,45 @@ static void do_outp(pio_addr_t addr,
}
}
-static void cpu_ioreq_pio(ioreq_t *req)
+/*
+ * Helper functions which read/write an object from/to physical guest
+ * memory, as part of the implementation of an ioreq.
+ *
+ * Equivalent to
+ * cpu_physical_memory_rw(addr + (req->df ? -1 : +1) * req->size * i,
+ * val, req->size, 0/1)
+ * except without the integer overflow problems.
+ */
+static void rw_phys_req_item(hwaddr addr,
+ ioreq_t *req, uint32_t i, void *val, int rw)
+{
+ /* Do everything unsigned so overflow just results in a truncated result
+ * and accesses to undesired parts of guest memory, which is up
+ * to the guest */
+ hwaddr offset = (hwaddr)req->size * i;
+ if (req->df) {
+ addr -= offset;
+ } else {
+ addr += offset;
+ }
+ cpu_physical_memory_rw(addr, val, req->size, rw);
+}
+
+static inline void read_phys_req_item(hwaddr addr,
+ ioreq_t *req, uint32_t i, void *val)
+{
+ rw_phys_req_item(addr, req, i, val, 0);
+}
+static inline void write_phys_req_item(hwaddr addr,
+ ioreq_t *req, uint32_t i, void *val)
{
- int i, sign;
+ rw_phys_req_item(addr, req, i, val, 1);
+}
- sign = req->df ? -1 : 1;
+
+static void cpu_ioreq_pio(ioreq_t *req)
+{
+ uint32_t i;
if (req->dir == IOREQ_READ) {
if (!req->data_is_ptr) {
@@ -712,9 +732,7 @@ static void cpu_ioreq_pio(ioreq_t *req)
for (i = 0; i < req->count; i++) {
tmp = do_inp(req->addr, req->size);
- cpu_physical_memory_write(
- req->data + (sign * i * (int64_t)req->size),
- (uint8_t *) &tmp, req->size);
+ write_phys_req_item(req->data, req, i, &tmp);
}
}
} else if (req->dir == IOREQ_WRITE) {
@@ -724,9 +742,7 @@ static void cpu_ioreq_pio(ioreq_t *req)
for (i = 0; i < req->count; i++) {
uint32_t tmp = 0;
- cpu_physical_memory_read(
- req->data + (sign * i * (int64_t)req->size),
- (uint8_t*) &tmp, req->size);
+ read_phys_req_item(req->data, req, i, &tmp);
do_outp(req->addr, req->size, tmp);
}
}
@@ -735,22 +751,16 @@ static void cpu_ioreq_pio(ioreq_t *req)
static void cpu_ioreq_move(ioreq_t *req)
{
- int i, sign;
-
- sign = req->df ? -1 : 1;
+ uint32_t i;
if (!req->data_is_ptr) {
if (req->dir == IOREQ_READ) {
for (i = 0; i < req->count; i++) {
- cpu_physical_memory_read(
- req->addr + (sign * i * (int64_t)req->size),
- (uint8_t *) &req->data, req->size);
+ read_phys_req_item(req->addr, req, i, &req->data);
}
} else if (req->dir == IOREQ_WRITE) {
for (i = 0; i < req->count; i++) {
- cpu_physical_memory_write(
- req->addr + (sign * i * (int64_t)req->size),
- (uint8_t *) &req->data, req->size);
+ write_phys_req_item(req->addr, req, i, &req->data);
}
}
} else {
@@ -758,21 +768,13 @@ static void cpu_ioreq_move(ioreq_t *req)
if (req->dir == IOREQ_READ) {
for (i = 0; i < req->count; i++) {
- cpu_physical_memory_read(
- req->addr + (sign * i * (int64_t)req->size),
- (uint8_t*) &tmp, req->size);
- cpu_physical_memory_write(
- req->data + (sign * i * (int64_t)req->size),
- (uint8_t*) &tmp, req->size);
+ read_phys_req_item(req->addr, req, i, &tmp);
+ write_phys_req_item(req->data, req, i, &tmp);
}
} else if (req->dir == IOREQ_WRITE) {
for (i = 0; i < req->count; i++) {
- cpu_physical_memory_read(
- req->data + (sign * i * (int64_t)req->size),
- (uint8_t*) &tmp, req->size);
- cpu_physical_memory_write(
- req->addr + (sign * i * (int64_t)req->size),
- (uint8_t*) &tmp, req->size);
+ read_phys_req_item(req->data, req, i, &tmp);
+ write_phys_req_item(req->addr, req, i, &tmp);
}
}
}
@@ -1076,7 +1078,6 @@ static void xen_read_physmap(XenIOState *state)
QLIST_INSERT_HEAD(&state->physmap, physmap, list);
}
free(entries);
- return;
}
int xen_hvm_init(void)
@@ -1158,7 +1159,7 @@ int xen_hvm_init(void)
state->memory_listener = xen_memory_listener;
QLIST_INIT(&state->physmap);
- memory_listener_register(&state->memory_listener, get_system_memory());
+ memory_listener_register(&state->memory_listener, &address_space_memory);
state->log_for_dirtybit = NULL;
/* Initialize backend core & drivers */
@@ -1213,3 +1214,24 @@ void xen_shutdown_fatal_error(const char *fmt, ...)
/* destroy the domain */
qemu_system_shutdown_request();
}
+
+void xen_modified_memory(ram_addr_t start, ram_addr_t length)
+{
+ if (unlikely(xen_in_migration)) {
+ int rc;
+ ram_addr_t start_pfn, nb_pages;
+
+ if (length == 0) {
+ length = TARGET_PAGE_SIZE;
+ }
+ start_pfn = start >> TARGET_PAGE_BITS;
+ nb_pages = ((start + length + TARGET_PAGE_SIZE - 1) >> TARGET_PAGE_BITS)
+ - start_pfn;
+ rc = xc_hvm_modified_memory(xen_xc, xen_domid, start_pfn, nb_pages);
+ if (rc) {
+ fprintf(stderr,
+ "%s failed for "RAM_ADDR_FMT" ("RAM_ADDR_FMT"): %i, %s\n",
+ __func__, start, nb_pages, rc, strerror(-rc));
+ }
+ }
+}
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-28 14:36:17 +0000