# HG changeset patch
# User Konrad Rzeszutek Wilk <konrad.wilk@xxxxxxxxxx>
# Date 1306250275 14400
# Node ID 38cb756ac7f62a3f6296e7d926f01376b7196024
# Parent 37c77bacb52aa7795978b994f9d371b979b2cb07
tools: Add xc_domain_set_memory_map and xc_get_machine_memory_map calls
(x86,amd64 only).
The later retrieves the E820 as seen by the hypervisor (completely
unchanged) and the second call sets the E820 for the specified guest.
Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@xxxxxxxxxx>
diff -r 37c77bacb52a -r 38cb756ac7f6 tools/libxc/xc_domain.c
--- a/tools/libxc/xc_domain.c Mon May 23 17:38:28 2011 +0100
+++ b/tools/libxc/xc_domain.c Tue May 24 11:17:55 2011 -0400
@@ -478,37 +478,64 @@ int xc_domain_pin_memory_cacheattr(xc_in
}
#if defined(__i386__) || defined(__x86_64__)
-#include "xc_e820.h"
+int xc_domain_set_memory_map(xc_interface *xch,
+ uint32_t domid,
+ struct e820entry entries[],
+ uint32_t nr_entries)
+{
+ int rc;
+ struct xen_foreign_memory_map fmap = {
+ .domid = domid,
+ .map = { .nr_entries = nr_entries }
+ };
+ DECLARE_HYPERCALL_BOUNCE(entries, nr_entries * sizeof(struct e820entry),
+ XC_HYPERCALL_BUFFER_BOUNCE_IN);
+
+ if ( !entries || xc_hypercall_bounce_pre(xch, entries) )
+ return -1;
+
+ set_xen_guest_handle(fmap.map.buffer, entries);
+
+ rc = do_memory_op(xch, XENMEM_set_memory_map, &fmap, sizeof(fmap));
+
+ xc_hypercall_bounce_post(xch, entries);
+
+ return rc;
+}
+int xc_get_machine_memory_map(xc_interface *xch,
+ struct e820entry entries[],
+ uint32_t max_entries)
+{
+ int rc;
+ struct xen_memory_map memmap = {
+ .nr_entries = max_entries
+ };
+ DECLARE_HYPERCALL_BOUNCE(entries, sizeof(struct e820entry) * max_entries,
+ XC_HYPERCALL_BUFFER_BOUNCE_OUT);
+
+ if ( !entries || xc_hypercall_bounce_pre(xch, entries) || max_entries <= 1)
+ return -1;
+
+
+ set_xen_guest_handle(memmap.buffer, entries);
+
+ rc = do_memory_op(xch, XENMEM_machine_memory_map, &memmap, sizeof(memmap));
+
+ xc_hypercall_bounce_post(xch, entries);
+
+ return rc ? rc : memmap.nr_entries;
+}
int xc_domain_set_memmap_limit(xc_interface *xch,
uint32_t domid,
unsigned long map_limitkb)
{
- int rc;
- struct xen_foreign_memory_map fmap = {
- .domid = domid,
- .map = { .nr_entries = 1 }
- };
- DECLARE_HYPERCALL_BUFFER(struct e820entry, e820);
+ struct e820entry e820;
- e820 = xc_hypercall_buffer_alloc(xch, e820, sizeof(*e820));
+ e820.addr = 0;
+ e820.size = (uint64_t)map_limitkb << 10;
+ e820.type = E820_RAM;
- if ( e820 == NULL )
- {
- PERROR("Could not allocate memory for xc_domain_set_memmap_limit
hypercall");
- return -1;
- }
-
- e820->addr = 0;
- e820->size = (uint64_t)map_limitkb << 10;
- e820->type = E820_RAM;
-
- set_xen_guest_handle(fmap.map.buffer, e820);
-
- rc = do_memory_op(xch, XENMEM_set_memory_map, &fmap, sizeof(fmap));
-
- xc_hypercall_buffer_free(xch, e820);
-
- return rc;
+ return xc_domain_set_memory_map(xch, domid, &e820, 1);
}
#else
int xc_domain_set_memmap_limit(xc_interface *xch,
diff -r 37c77bacb52a -r 38cb756ac7f6 tools/libxc/xc_e820.h
--- a/tools/libxc/xc_e820.h Mon May 23 17:38:28 2011 +0100
+++ b/tools/libxc/xc_e820.h Tue May 24 11:17:55 2011 -0400
@@ -26,6 +26,9 @@
#define E820_RESERVED 2
#define E820_ACPI 3
#define E820_NVS 4
+#define E820_UNUSABLE 5
+
+#define E820MAX (128)
struct e820entry {
uint64_t addr;
diff -r 37c77bacb52a -r 38cb756ac7f6 tools/libxc/xenctrl.h
--- a/tools/libxc/xenctrl.h Mon May 23 17:38:28 2011 +0100
+++ b/tools/libxc/xenctrl.h Tue May 24 11:17:55 2011 -0400
@@ -966,6 +966,17 @@ int xc_domain_set_memmap_limit(xc_interf
uint32_t domid,
unsigned long map_limitkb);
+#if defined(__i386__) || defined(__x86_64__)
+#include "xc_e820.h"
+int xc_domain_set_memory_map(xc_interface *xch,
+ uint32_t domid,
+ struct e820entry entries[],
+ uint32_t nr_entries);
+
+int xc_get_machine_memory_map(xc_interface *xch,
+ struct e820entry entries[],
+ uint32_t max_entries);
+#endif
int xc_domain_set_time_offset(xc_interface *xch,
uint32_t domid,
int32_t time_offset_seconds);
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