Xiaofeng Ling
2005-Sep-05 04:10 UTC
[Xen-devel] [PATCH][VT] patch make some share page can be accessed in vmx guest
This patch make some share page can be accessed in vmx guest
The share pages include shared_info, start_info, xen store share page
Also path store_evtchn, device_evtchn, control_evtchn to guest.
This patch are needed for para-driver in unmodified guest.
Signed-off-by: Xiaofeng Ling <xiaofeng.ling@intel.com>
Signed-off-by: Arun Sharma <arun.sharma@intel.com>
diff -r 23d8580d56b0 -r 2be69124cb06 tools/libxc/linux_boot_params.h
--- a/tools/libxc/linux_boot_params.h Fri Sep 2 18:23:57 2005
+++ b/tools/libxc/linux_boot_params.h Mon Sep 5 03:56:13 2005
@@ -18,6 +18,8 @@
#define E820_IO 16
#define E820_SHARED 17
#define E820_XENSTORE 18
+#define E820_STARTINFO 19
+#define E820_SHAREDINFO 20
u32 caching_attr; /* used by hypervisor */
#define MEMMAP_UC 0
diff -r 23d8580d56b0 -r 2be69124cb06 tools/libxc/xc_vmx_build.c
--- a/tools/libxc/xc_vmx_build.c Fri Sep 2 18:23:57 2005
+++ b/tools/libxc/xc_vmx_build.c Mon Sep 5 03:56:13 2005
@@ -62,7 +62,7 @@
mem_mapp->map[nr_map].caching_attr = MEMMAP_UC;
nr_map++;
-#define STATIC_PAGES 2 /* for ioreq_t and store_mfn */
+#define STATIC_PAGES 4 /* for ioreq_t and store_mfn and
start_info*/
/* Most of the ram goes here */
mem_mapp->map[nr_map].addr = 0x100000;
mem_mapp->map[nr_map].size = mem_size - 0x100000 -
STATIC_PAGES*PAGE_SIZE;
@@ -83,6 +83,24 @@
mem_mapp->map[nr_map].addr = mem_size - 2*PAGE_SIZE;
mem_mapp->map[nr_map].size = PAGE_SIZE;
mem_mapp->map[nr_map].type = E820_XENSTORE;
+ mem_mapp->map[nr_map].caching_attr = MEMMAP_WB;
+ nr_map++;
+
+ mem_mapp->map[nr_map].addr = mem_size - 3 * PAGE_SIZE;
+ mem_mapp->map[nr_map].size = PAGE_SIZE;
+ mem_mapp->map[nr_map].type = E820_SHAREDINFO;
+ mem_mapp->map[nr_map].caching_attr = MEMMAP_WB;
+ nr_map++;
+
+ mem_mapp->map[nr_map].addr = mem_size - 4 * PAGE_SIZE;
+ mem_mapp->map[nr_map].size = PAGE_SIZE;
+ mem_mapp->map[nr_map].type = E820_STARTINFO;
+ mem_mapp->map[nr_map].caching_attr = MEMMAP_WB;
+ nr_map++;
+
+ mem_mapp->map[nr_map].addr = mem_size - PAGE_SIZE;
+ mem_mapp->map[nr_map].size = PAGE_SIZE;
+ mem_mapp->map[nr_map].type = E820_SHARED;
mem_mapp->map[nr_map].caching_attr = MEMMAP_WB;
nr_map++;
@@ -227,6 +245,7 @@
unsigned long flags,
unsigned int vcpus,
unsigned int store_evtchn,
+ unsigned int device_evtchn,
unsigned long *store_mfn,
struct mem_map *mem_mapp
)
@@ -241,6 +260,7 @@
unsigned long l2tab;
unsigned long l1tab;
unsigned long count, i;
+ start_info_t *start_info;
shared_info_t *shared_info;
struct linux_boot_params * boot_paramsp;
__u16 * boot_gdtp;
@@ -262,6 +282,7 @@
unsigned long v_end;
unsigned long shared_page_frame = 0;
+ unsigned long startinfo_page_frame = 0;
shared_iopage_t *sp;
memset(&dsi, 0, sizeof(struct domain_setup_info));
@@ -289,7 +310,7 @@
/* memsize is in megabytes */
v_end = memsize << 20;
- vinitrd_end = v_end - PAGE_SIZE; /* leaving the top 4k
untouched for IO requests page use */
+ vinitrd_end = v_end - 4 * PAGE_SIZE; /* leaving the top 4k
untouched for IO requests page use */
vinitrd_start = vinitrd_end - initrd_len;
vinitrd_start = vinitrd_start & (~(PAGE_SIZE - 1));
@@ -368,6 +389,7 @@
l2tab = page_array[ppt_alloc++] << PAGE_SHIFT;
ctxt->ctrlreg[3] = l2tab;
+ page_array[((vpt_start - dsi.v_start)>>PAGE_SHIFT) - 3] =
shared_info_frame;
/* Initialise the page tables. */
if ( (vl2tab = xc_map_foreign_range(xc_handle, dom, PAGE_SIZE,
PROT_READ|PROT_WRITE,
@@ -530,7 +552,7 @@
/* If you need to create a special e820map, comment this line
and use mem-map.sxp */
build_e820map(mem_mapp, memsize << 20);
- *store_mfn = page_array[(v_end-2) >> PAGE_SHIFT];
+ *store_mfn = page_array[((vpt_start - dsi.v_start)>>PAGE_SHIFT) - 2];
#if defined (__i386__)
if (zap_mmio_ranges(xc_handle, dom, l2tab, mem_mapp) == -1)
#else
@@ -544,6 +566,8 @@
boot_paramsp->e820_map[i].type = mem_mapp->map[i].type;
if (mem_mapp->map[i].type == E820_SHARED)
shared_page_frame = (mem_mapp->map[i].addr >>
PAGE_SHIFT);
+ else if (mem_mapp->map[i].type == E820_STARTINFO)
+ startinfo_page_frame = (mem_mapp->map[i].addr >>
PAGE_SHIFT);
}
munmap(boot_paramsp, PAGE_SIZE);
@@ -575,9 +599,22 @@
page_array[shared_page_frame])) == 0)
goto error_out;
memset(sp, 0, PAGE_SIZE);
- sp->sp_global.eport = control_evtchn;
+ sp->sp_global.eport = device_evtchn;
munmap(sp, PAGE_SIZE);
+ start_info = xc_map_foreign_range(
+ xc_handle, dom, PAGE_SIZE, PROT_READ|PROT_WRITE,
+ page_array[startinfo_page_frame]);
+ memset(start_info, 0, PAGE_SIZE);
+ start_info->nr_pages = nr_pages;
+ start_info->shared_info = shared_info_frame << PAGE_SHIFT;
+ start_info->flags = flags;
+ start_info->pt_base = vpt_start;
+ start_info->nr_pt_frames = nr_pt_pages;
+ start_info->domain_controller_evtchn = control_evtchn;
+ start_info->store_mfn = *store_mfn;
+ start_info->store_evtchn = store_evtchn;
+ munmap(start_info, PAGE_SIZE);
/*
* Pin down l2tab addr as page dir page - causes hypervisor to provide
* correct protection for the page
@@ -658,6 +695,7 @@
unsigned long flags,
unsigned int vcpus,
unsigned int store_evtchn,
+ unsigned int device_evtchn,
unsigned long *store_mfn)
{
dom0_op_t launch_op, op;
@@ -733,7 +771,8 @@
initrd_gfd, initrd_size, nr_pages,
ctxt, cmdline,
op.u.getdomaininfo.shared_info_frame,
- control_evtchn, flags, vcpus, store_evtchn,
store_mfn,
+ control_evtchn, flags, vcpus, store_evtchn,
+ device_evtchn, store_mfn,
mem_mapp) < 0 )
{
ERROR("Error constructing guest OS");
diff -r 23d8580d56b0 -r 2be69124cb06 tools/libxc/xenguest.h
--- a/tools/libxc/xenguest.h Fri Sep 2 18:23:57 2005
+++ b/tools/libxc/xenguest.h Mon Sep 5 03:56:13 2005
@@ -63,6 +63,7 @@
unsigned long flags,
unsigned int vcpus,
unsigned int store_evtchn,
+ unsigned int device_evtchn,
unsigned long *store_mfn);
#endif
diff -r 23d8580d56b0 -r 2be69124cb06 tools/python/xen/lowlevel/xc/xc.c
--- a/tools/python/xen/lowlevel/xc/xc.c Fri Sep 2 18:23:57 2005
+++ b/tools/python/xen/lowlevel/xc/xc.c Mon Sep 5 03:56:13 2005
@@ -306,7 +306,7 @@
u32 dom;
char *image, *ramdisk = NULL, *cmdline = "";
PyObject *memmap;
- int control_evtchn, store_evtchn;
+ int control_evtchn, store_evtchn, device_evtchn;
int flags = 0, vcpus = 1;
int numItems, i;
int memsize;
@@ -314,13 +314,13 @@
unsigned long store_mfn = 0;
static char *kwd_list[] = { "dom", "control_evtchn",
"store_evtchn",
- "memsize", "image",
"memmap",
+ "device_evtchn", "memsize",
"image",
"memmap",
"ramdisk", "cmdline", "flags",
"vcpus", NULL };
- if ( !PyArg_ParseTupleAndKeywords(args, kwds, "iiiisO!|ssii",
kwd_list,
+ if ( !PyArg_ParseTupleAndKeywords(args, kwds, "iiiiisO!|ssii",
kwd_list,
&dom, &control_evtchn,
&store_evtchn,
- &memsize,
+ &device_evtchn, &memsize,
&image, &PyList_Type,
&memmap,
&ramdisk, &cmdline, &flags, &vcpus) )
return NULL;
@@ -375,7 +375,7 @@
if ( xc_vmx_build(xc->xc_handle, dom, memsize, image, &mem_map,
ramdisk, cmdline, control_evtchn, flags,
- vcpus, store_evtchn, &store_mfn) != 0 )
+ vcpus, store_evtchn, device_evtchn, &store_mfn)
!= 0 )
return PyErr_SetFromErrno(xc_error);
return Py_BuildValue("{s:i}", "store_mfn", store_mfn);
diff -r 23d8580d56b0 -r 2be69124cb06 tools/python/xen/xend/image.py
--- a/tools/python/xen/xend/image.py Fri Sep 2 18:23:57 2005
+++ b/tools/python/xen/xend/image.py Mon Sep 5 03:56:13 2005
@@ -302,8 +302,9 @@
store_evtchn = 0
ret = xc.vmx_build(dom = self.vm.getDomain(),
image = self.kernel,
- control_evtchn = self.device_channel.port2,
+ control_evtchn =
self.vm.channel.getRemotePort(),
store_evtchn = store_evtchn,
+ device_evtchn = self.device_channel.port2,
memsize = self.vm.memory,
memmap = self.memmap_value,
cmdline = self.cmdline,
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