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[Xen-devel,v2,8/8] tools: arm: increase size of region set aside for guest grant table

Message ID 1398424967-9306-8-git-send-email-ian.campbell@citrix.com
State New
Headers show

Commit Message

Ian Campbell April 25, 2014, 11:22 a.m. UTC
The current size is sufficient for the default maximum grant table size
(32-frames), but increase the reserved region to 16M/4096 pages to allow for
the use of the gnttab_max_nr_frames command line option.

Signed-off-by: Ian Campbell <ian.campbell@citrix.com>
---
v2: New patch
---
 xen/include/public/arch-arm.h |    5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

Comments

Julien Grall April 25, 2014, 12:59 p.m. UTC | #1
On 25/04/14 12:22, Ian Campbell wrote:
> The current size is sufficient for the default maximum grant table size
> (32-frames), but increase the reserved region to 16M/4096 pages to allow for
> the use of the gnttab_max_nr_frames command line option.
>
> Signed-off-by: Ian Campbell <ian.campbell@citrix.com>

Great! thanks for writing this patch.

Acked-by: Julien Grall <julien.grall@linaro.org>
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Patch

diff --git a/xen/include/public/arch-arm.h b/xen/include/public/arch-arm.h
index 3f457f1..061d59d 100644
--- a/xen/include/public/arch-arm.h
+++ b/xen/include/public/arch-arm.h
@@ -369,8 +369,11 @@  typedef uint64_t xen_callback_t;
 #define GUEST_GICC_BASE   0x03002000ULL
 #define GUEST_GICC_SIZE   0x00000100ULL
 
+/* 16MB == 4096 pages reserved for guest to use as a region to map its
+ * grant table in.
+ */
 #define GUEST_GNTTAB_BASE 0x38000000ULL
-#define GUEST_GNTTAB_SIZE 0x00020000ULL
+#define GUEST_GNTTAB_SIZE 0x01000000ULL
 
 #define GUEST_MAGIC_BASE  0x39000000ULL