Date: Thu, 19 Dec 2013 19:54:55 +0100 From: Roger Pau Monne <roger.pau@citrix.com> To: <freebsd-xen@freebsd.org>, <freebsd-current@freebsd.org>, <xen-devel@lists.xen.org>, <gibbs@freebsd.org>, <jhb@freebsd.org>, <kib@freebsd.org>, <julien.grall@citrix.com> Cc: Roger Pau Monne <roger.pau@citrix.com> Subject: [PATCH v7 18/19] xen: changes to gnttab for PVH Message-ID: <1387479296-33389-19-git-send-email-roger.pau@citrix.com> In-Reply-To: <1387479296-33389-1-git-send-email-roger.pau@citrix.com> References: <1387479296-33389-1-git-send-email-roger.pau@citrix.com>
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---
sys/xen/gnttab.c | 26 +++++++++++++++++++++-----
1 files changed, 21 insertions(+), 5 deletions(-)
diff --git a/sys/xen/gnttab.c b/sys/xen/gnttab.c
index 03c32b7..6949be5 100644
--- a/sys/xen/gnttab.c
+++ b/sys/xen/gnttab.c
@@ -25,6 +25,7 @@ __FBSDID("$FreeBSD$");
#include <sys/lock.h>
#include <sys/malloc.h>
#include <sys/mman.h>
+#include <sys/limits.h>
#include <xen/xen-os.h>
#include <xen/hypervisor.h>
@@ -607,6 +608,7 @@ gnttab_resume(void)
{
int error;
unsigned int max_nr_gframes, nr_gframes;
+ void *alloc_mem;
nr_gframes = nr_grant_frames;
max_nr_gframes = max_nr_grant_frames();
@@ -614,11 +616,25 @@ gnttab_resume(void)
return (ENOSYS);
if (!resume_frames) {
- error = xenpci_alloc_space(PAGE_SIZE * max_nr_gframes,
- &resume_frames);
- if (error) {
- printf("error mapping gnttab share frames\n");
- return (error);
+ if (xen_pv_domain()) {
+ /*
+ * This is a waste of physical memory,
+ * we should use ballooned pages instead,
+ * but it will do for now.
+ */
+ alloc_mem = contigmalloc(max_nr_gframes * PAGE_SIZE,
+ M_DEVBUF, M_NOWAIT, 0,
+ ULONG_MAX, PAGE_SIZE, 0);
+ KASSERT((alloc_mem != NULL),
+ ("unable to alloc memory for gnttab"));
+ resume_frames = vtophys(alloc_mem);
+ } else {
+ error = xenpci_alloc_space(PAGE_SIZE * max_nr_gframes,
+ &resume_frames);
+ if (error) {
+ printf("error mapping gnttab share frames\n");
+ return (error);
+ }
}
}
--
1.7.7.5 (Apple Git-26)
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