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[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index] [Xen-changelog] [xen-unstable] lib{xc, xl}: Seed grant tables with xenstore and console grants
# HG changeset patch
# User Alex Zeffertt <alex.zeffertt@xxxxxxxxxxxxx>
# Date 1328812410 0
# Node ID 691758c8786149c07c3050ca34823b2fdc57f568
# Parent b0d53cb93cc6e47ea467ab7c24d42ed4090259b7
lib{xc,xl}: Seed grant tables with xenstore and console grants
This patch claims one reserved grant entry for the console and another
for the xenstore. It modifies the builder to fill in the grant table
entries for the console and the xenstore.
Previous versions of this patch have been sent to xen-devel. See
http://lists.xensource.com/archives/html/xen-devel/2008-07/msg00610.html
http://lists.xensource.com/archives/html/xen-devel/2009-03/msg01491.html
Signed-off-by: Diego Ongaro <diego.ongaro@xxxxxxxxxx>
Signed-off-by: Alex Zeffertt <alex.zeffertt@xxxxxxxxxxxxx>
Signed-off-by: Daniel De Graaf <dgdegra@xxxxxxxxxxxxx>
Acked-by: Ian Campbell <ian.campbell@xxxxxxxxxx>
Cc: Ian Jackson <ian.jackson@xxxxxxxxxxxxx>
Cc: Stefano Stabellini <stefano.stabellini@xxxxxxxxxxxxx>
Committed-by: Ian Jackson <Ian.Jackson@xxxxxxxxxxxxx>
---
diff -r b0d53cb93cc6 -r 691758c87861 tools/libxc/xc_dom.h
--- a/tools/libxc/xc_dom.h Thu Feb 09 18:33:29 2012 +0000
+++ b/tools/libxc/xc_dom.h Thu Feb 09 18:33:30 2012 +0000
@@ -18,6 +18,9 @@
#define INVALID_P2M_ENTRY ((xen_pfn_t)-1)
+/* Scrach PFN for temporary mappings in HVM */
+#define SCRATCH_PFN_GNTTAB 0xFFFFE
+
/* --- typedefs and structs ---------------------------------------- */
typedef uint64_t xen_vaddr_t;
@@ -107,6 +110,8 @@
unsigned long flags;
unsigned int console_evtchn;
unsigned int xenstore_evtchn;
+ domid_t console_domid;
+ domid_t xenstore_domid;
xen_pfn_t shared_info_mfn;
xc_interface *xch;
@@ -200,6 +205,17 @@
xen_pfn_t count);
int xc_dom_boot_image(struct xc_dom_image *dom);
int xc_dom_compat_check(struct xc_dom_image *dom);
+int xc_dom_gnttab_init(struct xc_dom_image *dom);
+int xc_dom_gnttab_hvm_seed(xc_interface *xch, domid_t domid,
+ xen_pfn_t console_gmfn,
+ xen_pfn_t xenstore_gmfn,
+ domid_t console_domid,
+ domid_t xenstore_domid);
+int xc_dom_gnttab_seed(xc_interface *xch, domid_t domid,
+ xen_pfn_t console_gmfn,
+ xen_pfn_t xenstore_gmfn,
+ domid_t console_domid,
+ domid_t xenstore_domid);
/* --- debugging bits ---------------------------------------------- */
diff -r b0d53cb93cc6 -r 691758c87861 tools/libxc/xc_dom_boot.c
--- a/tools/libxc/xc_dom_boot.c Thu Feb 09 18:33:29 2012 +0000
+++ b/tools/libxc/xc_dom_boot.c Thu Feb 09 18:33:30 2012 +0000
@@ -34,6 +34,7 @@
#include "xg_private.h"
#include "xc_dom.h"
#include <xen/hvm/params.h>
+#include <xen/grant_table.h>
/* ------------------------------------------------------------------------ */
@@ -275,6 +276,161 @@
return rc;
}
+static xen_pfn_t xc_dom_gnttab_setup(xc_interface *xch, domid_t domid)
+{
+ gnttab_setup_table_t setup;
+ DECLARE_HYPERCALL_BUFFER(xen_pfn_t, gmfnp);
+ int rc;
+ xen_pfn_t gmfn;
+
+ gmfnp = xc_hypercall_buffer_alloc(xch, gmfnp, sizeof(*gmfnp));
+ if (gmfnp == NULL)
+ return -1;
+
+ setup.dom = domid;
+ setup.nr_frames = 1;
+ set_xen_guest_handle(setup.frame_list, gmfnp);
+ setup.status = 0;
+
+ rc = xc_gnttab_op(xch, GNTTABOP_setup_table, &setup, sizeof(setup), 1);
+ gmfn = *gmfnp;
+ xc_hypercall_buffer_free(xch, gmfnp);
+
+ if ( rc != 0 || setup.status != GNTST_okay )
+ {
+ xc_dom_panic(xch, XC_INTERNAL_ERROR,
+ "%s: failed to setup domU grant table "
+ "[errno=%d, status=%" PRId16 "]\n",
+ __FUNCTION__, rc != 0 ? errno : 0, setup.status);
+ return -1;
+ }
+
+ return gmfn;
+}
+
+int xc_dom_gnttab_seed(xc_interface *xch, domid_t domid,
+ xen_pfn_t console_gmfn,
+ xen_pfn_t xenstore_gmfn,
+ domid_t console_domid,
+ domid_t xenstore_domid)
+{
+
+ xen_pfn_t gnttab_gmfn;
+ grant_entry_v1_t *gnttab;
+
+ gnttab_gmfn = xc_dom_gnttab_setup(xch, domid);
+ if ( gnttab_gmfn == -1 )
+ return -1;
+
+ gnttab = xc_map_foreign_range(xch,
+ domid,
+ PAGE_SIZE,
+ PROT_READ|PROT_WRITE,
+ gnttab_gmfn);
+ if ( gnttab == NULL )
+ {
+ xc_dom_panic(xch, XC_INTERNAL_ERROR,
+ "%s: failed to map domU grant table "
+ "[errno=%d]\n",
+ __FUNCTION__, errno);
+ return -1;
+ }
+
+ if ( domid != console_domid && console_gmfn != -1)
+ {
+ gnttab[GNTTAB_RESERVED_CONSOLE].flags = GTF_permit_access;
+ gnttab[GNTTAB_RESERVED_CONSOLE].domid = console_domid;
+ gnttab[GNTTAB_RESERVED_CONSOLE].frame = console_gmfn;
+ }
+ if ( domid != xenstore_domid && xenstore_gmfn != -1)
+ {
+ gnttab[GNTTAB_RESERVED_XENSTORE].flags = GTF_permit_access;
+ gnttab[GNTTAB_RESERVED_XENSTORE].domid = xenstore_domid;
+ gnttab[GNTTAB_RESERVED_XENSTORE].frame = xenstore_gmfn;
+ }
+
+ if ( munmap(gnttab, PAGE_SIZE) == -1 )
+ {
+ xc_dom_panic(xch, XC_INTERNAL_ERROR,
+ "%s: failed to unmap domU grant table "
+ "[errno=%d]\n",
+ __FUNCTION__, errno);
+ return -1;
+ }
+
+ return 0;
+}
+
+int xc_dom_gnttab_hvm_seed(xc_interface *xch, domid_t domid,
+ xen_pfn_t console_gpfn,
+ xen_pfn_t xenstore_gpfn,
+ domid_t console_domid,
+ domid_t xenstore_domid)
+{
+ int rc;
+ struct xen_add_to_physmap xatp = {
+ .domid = domid,
+ .space = XENMAPSPACE_grant_table,
+ .idx = 0,
+ .gpfn = SCRATCH_PFN_GNTTAB
+ };
+ struct xen_remove_from_physmap xrfp = {
+ .domid = domid,
+ .gpfn = SCRATCH_PFN_GNTTAB
+ };
+
+ rc = do_memory_op(xch, XENMEM_add_to_physmap, &xatp, sizeof(xatp));
+ if ( rc != 0 )
+ {
+ xc_dom_panic(xch, XC_INTERNAL_ERROR,
+ "%s: failed to add gnttab to physmap "
+ "[errno=%d]\n",
+ __FUNCTION__, errno);
+ return -1;
+ }
+
+ rc = xc_dom_gnttab_seed(xch, domid,
+ console_gpfn, xenstore_gpfn,
+ console_domid, xenstore_domid);
+ if (rc != 0)
+ {
+ xc_dom_panic(xch, XC_INTERNAL_ERROR,
+ "%s: failed to seed gnttab entries\n",
+ __FUNCTION__);
+ (void) do_memory_op(xch, XENMEM_remove_from_physmap, &xrfp,
sizeof(xrfp));
+ return -1;
+ }
+
+ rc = do_memory_op(xch, XENMEM_remove_from_physmap, &xrfp, sizeof(xrfp));
+ if (rc != 0)
+ {
+ xc_dom_panic(xch, XC_INTERNAL_ERROR,
+ "%s: failed to remove gnttab from physmap "
+ "[errno=%d]\n",
+ __FUNCTION__, errno);
+ return -1;
+ }
+
+ return 0;
+}
+
+int xc_dom_gnttab_init(struct xc_dom_image *dom)
+{
+ xen_pfn_t console_gmfn;
+ xen_pfn_t xenstore_gmfn;
+ int autotranslated;
+
+ autotranslated = xc_dom_feature_translated(dom);
+ console_gmfn = autotranslated ?
+ dom->console_pfn : xc_dom_p2m_host(dom, dom->console_pfn);
+ xenstore_gmfn = autotranslated ?
+ dom->xenstore_pfn : xc_dom_p2m_host(dom, dom->xenstore_pfn);
+
+ return xc_dom_gnttab_seed(dom->xch, dom->guest_domid,
+ console_gmfn, xenstore_gmfn,
+ dom->console_domid, dom->xenstore_domid);
+}
+
/*
* Local variables:
* mode: C
diff -r b0d53cb93cc6 -r 691758c87861 tools/libxc/xc_dom_compat_linux.c
--- a/tools/libxc/xc_dom_compat_linux.c Thu Feb 09 18:33:29 2012 +0000
+++ b/tools/libxc/xc_dom_compat_linux.c Thu Feb 09 18:33:30 2012 +0000
@@ -62,6 +62,8 @@
goto out;
if ( (rc = xc_dom_boot_image(dom)) != 0 )
goto out;
+ if ( (rc = xc_dom_gnttab_init(dom)) != 0)
+ goto out;
*console_mfn = xc_dom_p2m_host(dom, dom->console_pfn);
*store_mfn = xc_dom_p2m_host(dom, dom->xenstore_pfn);
diff -r b0d53cb93cc6 -r 691758c87861 tools/libxc/xc_domain_restore.c
--- a/tools/libxc/xc_domain_restore.c Thu Feb 09 18:33:29 2012 +0000
+++ b/tools/libxc/xc_domain_restore.c Thu Feb 09 18:33:30 2012 +0000
@@ -1259,7 +1259,8 @@
int xc_domain_restore(xc_interface *xch, int io_fd, uint32_t dom,
unsigned int store_evtchn, unsigned long *store_mfn,
- unsigned int console_evtchn, unsigned long *console_mfn,
+ domid_t store_domid, unsigned int console_evtchn,
+ unsigned long *console_mfn, domid_t console_domid,
unsigned int hvm, unsigned int pae, int superpages,
int no_incr_generationid,
unsigned long *vm_generationid_addr)
@@ -2018,6 +2019,14 @@
memcpy(ctx->live_p2m, ctx->p2m, dinfo->p2m_size * sizeof(xen_pfn_t));
munmap(ctx->live_p2m, P2M_FL_ENTRIES * PAGE_SIZE);
+ rc = xc_dom_gnttab_seed(xch, dom, *console_mfn, *store_mfn,
+ console_domid, store_domid);
+ if (rc != 0)
+ {
+ ERROR("error seeding grant table");
+ goto out;
+ }
+
DPRINTF("Domain ready to be built.\n");
rc = 0;
goto out;
@@ -2076,6 +2085,14 @@
goto out;
}
+ rc = xc_dom_gnttab_hvm_seed(xch, dom, *console_mfn, *store_mfn,
+ console_domid, store_domid);
+ if (rc != 0)
+ {
+ ERROR("error seeding grant table");
+ goto out;
+ }
+
/* HVM success! */
rc = 0;
diff -r b0d53cb93cc6 -r 691758c87861 tools/libxc/xenguest.h
--- a/tools/libxc/xenguest.h Thu Feb 09 18:33:29 2012 +0000
+++ b/tools/libxc/xenguest.h Thu Feb 09 18:33:30 2012 +0000
@@ -79,7 +79,8 @@
*/
int xc_domain_restore(xc_interface *xch, int io_fd, uint32_t dom,
unsigned int store_evtchn, unsigned long *store_mfn,
- unsigned int console_evtchn, unsigned long *console_mfn,
+ domid_t store_domid, unsigned int console_evtchn,
+ unsigned long *console_mfn, domid_t console_domid,
unsigned int hvm, unsigned int pae, int superpages,
int no_incr_generationid,
unsigned long *vm_generationid_addr);
diff -r b0d53cb93cc6 -r 691758c87861 tools/libxl/libxl_dom.c
--- a/tools/libxl/libxl_dom.c Thu Feb 09 18:33:29 2012 +0000
+++ b/tools/libxl/libxl_dom.c Thu Feb 09 18:33:30 2012 +0000
@@ -225,7 +225,9 @@
dom->flags = flags;
dom->console_evtchn = state->console_port;
+ dom->console_domid = state->console_domid;
dom->xenstore_evtchn = state->store_port;
+ dom->xenstore_domid = state->store_domid;
if ( (ret = xc_dom_boot_xen_init(dom, ctx->xch, domid)) != 0 ) {
LIBXL__LOG_ERRNO(ctx, LIBXL__LOG_ERROR, "xc_dom_boot_xen_init failed");
@@ -251,6 +253,10 @@
LIBXL__LOG_ERRNO(ctx, LIBXL__LOG_ERROR, "xc_dom_boot_image failed");
goto out;
}
+ if ( (ret = xc_dom_gnttab_init(dom)) != 0 ) {
+ LIBXL__LOG_ERRNO(ctx, LIBXL__LOG_ERROR, "xc_dom_gnttab_init failed");
+ goto out;
+ }
state->console_mfn = xc_dom_p2m_host(dom, dom->console_pfn);
state->store_mfn = xc_dom_p2m_host(dom, dom->xenstore_pfn);
@@ -271,7 +277,8 @@
static int hvm_build_set_params(xc_interface *handle, uint32_t domid,
libxl_domain_build_info *info,
int store_evtchn, unsigned long *store_mfn,
- int console_evtchn, unsigned long *console_mfn)
+ int console_evtchn, unsigned long *console_mfn,
+ domid_t store_domid, domid_t console_domid)
{
struct hvm_info_table *va_hvm;
uint8_t *va_map, sum;
@@ -304,6 +311,8 @@
xc_set_hvm_param(handle, domid, HVM_PARAM_NESTEDHVM,
info->u.hvm.nested_hvm);
xc_set_hvm_param(handle, domid, HVM_PARAM_STORE_EVTCHN, store_evtchn);
xc_set_hvm_param(handle, domid, HVM_PARAM_CONSOLE_EVTCHN, console_evtchn);
+
+ xc_dom_gnttab_hvm_seed(handle, domid, *console_mfn, *store_mfn,
console_domid, store_domid);
return 0;
}
@@ -355,7 +364,9 @@
goto out;
}
ret = hvm_build_set_params(ctx->xch, domid, info, state->store_port,
- &state->store_mfn, state->console_port,
&state->console_mfn);
+ &state->store_mfn, state->console_port,
+ &state->console_mfn, state->store_domid,
+ state->console_domid);
if (ret) {
LIBXL__LOG_ERRNOVAL(ctx, LIBXL__LOG_ERROR, ret, "hvm build set params
failed");
goto out;
@@ -402,7 +413,8 @@
}
rc = xc_domain_restore(ctx->xch, fd, domid,
state->store_port, &state->store_mfn,
- state->console_port, &state->console_mfn,
+ state->store_domid, state->console_port,
+ &state->console_mfn, state->console_domid,
hvm, pae, superpages, no_incr_generationid,
&state->vm_generationid_addr);
if ( rc ) {
diff -r b0d53cb93cc6 -r 691758c87861 tools/xcutils/xc_restore.c
--- a/tools/xcutils/xc_restore.c Thu Feb 09 18:33:29 2012 +0000
+++ b/tools/xcutils/xc_restore.c Thu Feb 09 18:33:30 2012 +0000
@@ -45,8 +45,8 @@
else
superpages = !!hvm;
- ret = xc_domain_restore(xch, io_fd, domid, store_evtchn, &store_mfn,
- console_evtchn, &console_mfn, hvm, pae, superpages,
+ ret = xc_domain_restore(xch, io_fd, domid, store_evtchn, &store_mfn, 0,
+ console_evtchn, &console_mfn, 0, hvm, pae,
superpages,
0, NULL);
if ( ret == 0 )
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