david.venhoff/QEMU-Nyx-fork
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

xen: Introduce VGA sync dirty bitmap support

Browse Source 
This patch introduces phys memory client for Xen.

Only sync dirty_bitmap and set_memory are actually implemented.
migration_log will stay empty for the moment.

Xen can only log one range for bit change, so only the range in the
first call will be synced.

Signed-off-by: Anthony PERARD <anthony.perard@citrix.com>
Signed-off-by: Alexander Graf <agraf@suse.de>
This commit is contained in:
Anthony PERARD 2011-05-24 14:34:21 +01:00 committed by Alexander Graf
parent b87de24e6c
commit b4dd7802ca
2 changed files with 268 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

1
trace-events
View File

@ -396,6 +396,7 @@ disable milkymist_vgafb_memory_write(uint32_t addr, uint32_t value) "addr %08x v
# xen-all.c
disable xen_ram_alloc(unsigned long ram_addr, unsigned long size) "requested: %#lx, size %#lx"
disable xen_client_set_memory(uint64_t start_addr, unsigned long size, unsigned long phys_offset, bool log_dirty) "%#"PRIx64" size %#lx, offset %#lx, log_dirty %i"
# xen-mapcache.c
disable qemu_map_cache(uint64_t phys_addr) "want %#"PRIx64""

267
xen-all.c
View File

@ -13,6 +13,7 @@
#include "hw/xen_common.h"
#include "hw/xen_backend.h"
#include "range.h"
#include "xen-mapcache.h"
#include "trace.h"
@ -54,6 +55,14 @@ 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;
ram_addr_t size;
target_phys_addr_t phys_offset;
QLIST_ENTRY(XenPhysmap) list;
} XenPhysmap;
typedef struct XenIOState {
shared_iopage_t *shared_page;
buffered_iopage_t *buffered_io_page;
@ -66,6 +75,9 @@ typedef struct XenIOState {
int send_vcpu;
struct xs_handle *xenstore;
CPUPhysMemoryClient client;
QLIST_HEAD(, XenPhysmap) physmap;
const XenPhysmap *log_for_dirtybit;
Notifier exit;
} XenIOState;
@ -178,6 +190,256 @@ void xen_ram_alloc(ram_addr_t ram_addr, ram_addr_t size)
qemu_free(pfn_list);
}
static XenPhysmap *get_physmapping(XenIOState *state,
target_phys_addr_t start_addr, ram_addr_t size)
{
XenPhysmap *physmap = NULL;
start_addr &= TARGET_PAGE_MASK;
QLIST_FOREACH(physmap, &state->physmap, list) {
if (range_covers_byte(physmap->start_addr, physmap->size, start_addr)) {
return physmap;
}
}
return NULL;
}
#if CONFIG_XEN_CTRL_INTERFACE_VERSION >= 340
static int xen_add_to_physmap(XenIOState *state,
target_phys_addr_t start_addr,
ram_addr_t size,
target_phys_addr_t phys_offset)
{
unsigned long i = 0;
int rc = 0;
XenPhysmap *physmap = NULL;
target_phys_addr_t pfn, start_gpfn;
if (get_physmapping(state, start_addr, size)) {
return 0;
}
if (size <= 0) {
return -1;
}
DPRINTF("mapping vram to %llx - %llx, from %llx\n",
start_addr, start_addr + size, phys_offset);
pfn = phys_offset >> TARGET_PAGE_BITS;
start_gpfn = start_addr >> TARGET_PAGE_BITS;
for (i = 0; i < size >> TARGET_PAGE_BITS; i++) {
unsigned long idx = pfn + i;
xen_pfn_t gpfn = start_gpfn + i;
rc = xc_domain_add_to_physmap(xen_xc, xen_domid, XENMAPSPACE_gmfn, idx, gpfn);
if (rc) {
DPRINTF("add_to_physmap MFN %"PRI_xen_pfn" to PFN %"
PRI_xen_pfn" failed: %d\n", idx, gpfn, rc);
return -rc;
}
}
physmap = qemu_malloc(sizeof (XenPhysmap));
physmap->start_addr = start_addr;
physmap->size = size;
physmap->phys_offset = phys_offset;
QLIST_INSERT_HEAD(&state->physmap, physmap, list);
xc_domain_pin_memory_cacheattr(xen_xc, xen_domid,
start_addr >> TARGET_PAGE_BITS,
(start_addr + size) >> TARGET_PAGE_BITS,
XEN_DOMCTL_MEM_CACHEATTR_WB);
return 0;
}
static int xen_remove_from_physmap(XenIOState *state,
target_phys_addr_t start_addr,
ram_addr_t size)
{
unsigned long i = 0;
int rc = 0;
XenPhysmap *physmap = NULL;
target_phys_addr_t phys_offset = 0;
physmap = get_physmapping(state, start_addr, size);
if (physmap == NULL) {
return -1;
}
phys_offset = physmap->phys_offset;
size = physmap->size;
DPRINTF("unmapping vram to %llx - %llx, from %llx\n",
phys_offset, phys_offset + size, start_addr);
size >>= TARGET_PAGE_BITS;
start_addr >>= TARGET_PAGE_BITS;
phys_offset >>= TARGET_PAGE_BITS;
for (i = 0; i < size; i++) {
unsigned long idx = start_addr + i;
xen_pfn_t gpfn = phys_offset + i;
rc = xc_domain_add_to_physmap(xen_xc, xen_domid, XENMAPSPACE_gmfn, idx, gpfn);
if (rc) {
fprintf(stderr, "add_to_physmap MFN %"PRI_xen_pfn" to PFN %"
PRI_xen_pfn" failed: %d\n", idx, gpfn, rc);
return -rc;
}
}
QLIST_REMOVE(physmap, list);
if (state->log_for_dirtybit == physmap) {
state->log_for_dirtybit = NULL;
}
free(physmap);
return 0;
}
#else
static int xen_add_to_physmap(XenIOState *state,
target_phys_addr_t start_addr,
ram_addr_t size,
target_phys_addr_t phys_offset)
{
return -ENOSYS;
}
static int xen_remove_from_physmap(XenIOState *state,
target_phys_addr_t start_addr,
ram_addr_t size)
{
return -ENOSYS;
}
#endif
static void xen_client_set_memory(struct CPUPhysMemoryClient *client,
target_phys_addr_t start_addr,
ram_addr_t size,
ram_addr_t phys_offset,
bool log_dirty)
{
XenIOState *state = container_of(client, XenIOState, client);
ram_addr_t flags = phys_offset & ~TARGET_PAGE_MASK;
hvmmem_type_t mem_type;
if (!(start_addr != phys_offset
&& ( (log_dirty && flags < IO_MEM_UNASSIGNED)
|| (!log_dirty && flags == IO_MEM_UNASSIGNED)))) {
return;
}
trace_xen_client_set_memory(start_addr, size, phys_offset, log_dirty);
start_addr &= TARGET_PAGE_MASK;
size = TARGET_PAGE_ALIGN(size);
phys_offset &= TARGET_PAGE_MASK;
switch (flags) {
case IO_MEM_RAM:
xen_add_to_physmap(state, start_addr, size, phys_offset);
break;
case IO_MEM_ROM:
mem_type = HVMMEM_ram_ro;
if (xc_hvm_set_mem_type(xen_xc, xen_domid, mem_type,
start_addr >> TARGET_PAGE_BITS,
size >> TARGET_PAGE_BITS)) {
DPRINTF("xc_hvm_set_mem_type error, addr: "TARGET_FMT_plx"\n",
start_addr);
}
break;
case IO_MEM_UNASSIGNED:
if (xen_remove_from_physmap(state, start_addr, size) < 0) {
DPRINTF("physmapping does not exist at "TARGET_FMT_plx"\n", start_addr);
}
break;
}
}
static int xen_sync_dirty_bitmap(XenIOState *state,
target_phys_addr_t start_addr,
ram_addr_t size)
{
target_phys_addr_t npages = size >> TARGET_PAGE_BITS;
target_phys_addr_t vram_offset = 0;
const int width = sizeof(unsigned long) * 8;
unsigned long bitmap[(npages + width - 1) / width];
int rc, i, j;
const XenPhysmap *physmap = NULL;
physmap = get_physmapping(state, start_addr, size);
if (physmap == NULL) {
/* not handled */
return -1;
}
if (state->log_for_dirtybit == NULL) {
state->log_for_dirtybit = physmap;
} else if (state->log_for_dirtybit != physmap) {
return -1;
}
vram_offset = physmap->phys_offset;
rc = xc_hvm_track_dirty_vram(xen_xc, xen_domid,
start_addr >> TARGET_PAGE_BITS, npages,
bitmap);
if (rc) {
return rc;
}
for (i = 0; i < ARRAY_SIZE(bitmap); i++) {
unsigned long map = bitmap[i];
while (map != 0) {
j = ffsl(map) - 1;
map &= ~(1ul << j);
cpu_physical_memory_set_dirty(vram_offset + (i * width + j) * TARGET_PAGE_SIZE);
};
}
return 0;
}
static int xen_log_start(CPUPhysMemoryClient *client, target_phys_addr_t phys_addr, ram_addr_t size)
{
XenIOState *state = container_of(client, XenIOState, client);
return xen_sync_dirty_bitmap(state, phys_addr, size);
}
static int xen_log_stop(CPUPhysMemoryClient *client, target_phys_addr_t phys_addr, ram_addr_t size)
{
XenIOState *state = container_of(client, XenIOState, client);
state->log_for_dirtybit = NULL;
/* Disable dirty bit tracking */
return xc_hvm_track_dirty_vram(xen_xc, xen_domid, 0, 0, NULL);
}
static int xen_client_sync_dirty_bitmap(struct CPUPhysMemoryClient *client,
target_phys_addr_t start_addr,
target_phys_addr_t end_addr)
{
XenIOState *state = container_of(client, XenIOState, client);
return xen_sync_dirty_bitmap(state, start_addr, end_addr - start_addr);
}
static int xen_client_migration_log(struct CPUPhysMemoryClient *client,
int enable)
{
return 0;
}
static CPUPhysMemoryClient xen_cpu_phys_memory_client = {
.set_memory = xen_client_set_memory,
.sync_dirty_bitmap = xen_client_sync_dirty_bitmap,
.migration_log = xen_client_migration_log,
.log_start = xen_log_start,
.log_stop = xen_log_stop,
};
/* VCPU Operations, MMIO, IO ring ... */
@ -581,6 +843,11 @@ int xen_hvm_init(void)
qemu_add_vm_change_state_handler(xen_vm_change_state_handler, state);
state->client = xen_cpu_phys_memory_client;
QLIST_INIT(&state->physmap);
cpu_register_phys_memory_client(&state->client);
state->log_for_dirtybit = NULL;
return 0;
}