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authorStefano Stabellini <stefano.stabellini@eu.citrix.com>2012-01-19 15:56:11 +0000
committerStefano Stabellini <stefano.stabellini@eu.citrix.com>2012-03-19 18:21:12 +0000
commitd1814e08c0409d9f352f9ea7fab377bcee1286b8 (patch)
tree2876cca34c7f117b62f84d770e0f24363479775f
parent81323a6c16e8042ef74f789a0c8d7188f6d18a14 (diff)
downloadqemu-arm-d1814e08c0409d9f352f9ea7fab377bcee1286b8.tar.gz
xen: record physmap changes to xenstore
Write to xenstore any physmap changes so that the hypervisor can be aware of them. Read physmap changes from xenstore on boot. Signed-off-by: Stefano Stabellini <stefano.stabellini@eu.citrix.com>
-rw-r--r--xen-all.c78
1 files changed, 77 insertions, 1 deletions
diff --git a/xen-all.c b/xen-all.c
index b0ed1ed193..f2cad8227e 100644
--- a/xen-all.c
+++ b/xen-all.c
@@ -65,7 +65,7 @@ static inline ioreq_t *xen_vcpu_ioreq(shared_iopage_t *shared_page, int vcpu)
typedef struct XenPhysmap {
target_phys_addr_t start_addr;
ram_addr_t size;
- MemoryRegion *mr;
+ char *name;
target_phys_addr_t phys_offset;
QLIST_ENTRY(XenPhysmap) list;
@@ -237,6 +237,7 @@ static int xen_add_to_physmap(XenIOState *state,
XenPhysmap *physmap = NULL;
target_phys_addr_t pfn, start_gpfn;
target_phys_addr_t phys_offset = memory_region_get_ram_addr(mr);
+ char path[80], value[17];
if (get_physmapping(state, start_addr, size)) {
return 0;
@@ -275,6 +276,7 @@ go_physmap:
physmap->start_addr = start_addr;
physmap->size = size;
+ physmap->name = (char *)mr->name;
physmap->phys_offset = phys_offset;
QLIST_INSERT_HEAD(&state->physmap, physmap, list);
@@ -283,6 +285,30 @@ go_physmap:
start_addr >> TARGET_PAGE_BITS,
(start_addr + size) >> TARGET_PAGE_BITS,
XEN_DOMCTL_MEM_CACHEATTR_WB);
+
+ snprintf(path, sizeof(path),
+ "/local/domain/0/device-model/%d/physmap/%"PRIx64"/start_addr",
+ xen_domid, (uint64_t)phys_offset);
+ snprintf(value, sizeof(value), "%"PRIx64, (uint64_t)start_addr);
+ if (!xs_write(state->xenstore, 0, path, value, strlen(value))) {
+ return -1;
+ }
+ snprintf(path, sizeof(path),
+ "/local/domain/0/device-model/%d/physmap/%"PRIx64"/size",
+ xen_domid, (uint64_t)phys_offset);
+ snprintf(value, sizeof(value), "%"PRIx64, (uint64_t)size);
+ if (!xs_write(state->xenstore, 0, path, value, strlen(value))) {
+ return -1;
+ }
+ if (mr->name) {
+ snprintf(path, sizeof(path),
+ "/local/domain/0/device-model/%d/physmap/%"PRIx64"/name",
+ xen_domid, (uint64_t)phys_offset);
+ if (!xs_write(state->xenstore, 0, path, mr->name, strlen(mr->name))) {
+ return -1;
+ }
+ }
+
return 0;
}
@@ -911,6 +937,55 @@ int xen_init(void)
return 0;
}
+static void xen_read_physmap(XenIOState *state)
+{
+ XenPhysmap *physmap = NULL;
+ unsigned int len, num, i;
+ char path[80], *value = NULL;
+ char **entries = NULL;
+
+ snprintf(path, sizeof(path),
+ "/local/domain/0/device-model/%d/physmap", xen_domid);
+ entries = xs_directory(state->xenstore, 0, path, &num);
+ if (entries == NULL)
+ return;
+
+ for (i = 0; i < num; i++) {
+ physmap = g_malloc(sizeof (XenPhysmap));
+ physmap->phys_offset = strtoull(entries[i], NULL, 16);
+ snprintf(path, sizeof(path),
+ "/local/domain/0/device-model/%d/physmap/%s/start_addr",
+ xen_domid, entries[i]);
+ value = xs_read(state->xenstore, 0, path, &len);
+ if (value == NULL) {
+ free(physmap);
+ continue;
+ }
+ physmap->start_addr = strtoull(value, NULL, 16);
+ free(value);
+
+ snprintf(path, sizeof(path),
+ "/local/domain/0/device-model/%d/physmap/%s/size",
+ xen_domid, entries[i]);
+ value = xs_read(state->xenstore, 0, path, &len);
+ if (value == NULL) {
+ free(physmap);
+ continue;
+ }
+ physmap->size = strtoull(value, NULL, 16);
+ free(value);
+
+ snprintf(path, sizeof(path),
+ "/local/domain/0/device-model/%d/physmap/%s/name",
+ xen_domid, entries[i]);
+ physmap->name = xs_read(state->xenstore, 0, path, &len);
+
+ QLIST_INSERT_HEAD(&state->physmap, physmap, list);
+ }
+ free(entries);
+ return;
+}
+
int xen_hvm_init(void)
{
int i, rc;
@@ -986,6 +1061,7 @@ int xen_hvm_init(void)
xen_be_register("console", &xen_console_ops);
xen_be_register("vkbd", &xen_kbdmouse_ops);
xen_be_register("qdisk", &xen_blkdev_ops);
+ xen_read_physmap(state);
return 0;
}