[PATCH] iommu/ipmmu-vmsa: Add missing 'U' in IMTTLBR0_TTBR_MASK for shifted constant

[Oleksandr Tyshchenko <olekstysh@xxxxxxxxx>]

From: Oleksandr Tyshchenko <oleksandr_tyshchenko@xxxxxxxx>

With enabling both CONFIG_UBSAN and CONFIG_IPMMU_VMSA I have got the following
splat when an IOMMU driver tried to setup page tables:

(XEN) ipmmu: /soc/iommu@e67b0000: d1: Set IPMMU context 1 (pgd 0x77fe90000)
(XEN) 
================================================================================
(XEN) UBSAN: Undefined behaviour in drivers/passthrough/arm/ipmmu-vmsa.c:558:51
(XEN) left shift of 1048575 by 12 places cannot be represented in type 'int'
(XEN) Xen WARN at common/ubsan/ubsan.c:172
(XEN) ---[ Xen-4.18-unstable  arm64  debug=y ubsan=y  Tainted:      S ]----
...

This points to shifted constant in IMTTLBR0_TTBR_MASK. Fix that by adding
missing 'U' to it.

This should also address MISRA Rule 7.2:

A "u" or "U" suffix shall be applied to all integer constants that
are represented in an unsigned type.

Signed-off-by: Oleksandr Tyshchenko <oleksandr_tyshchenko@xxxxxxxx>
---
 xen/drivers/passthrough/arm/ipmmu-vmsa.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/xen/drivers/passthrough/arm/ipmmu-vmsa.c 
b/xen/drivers/passthrough/arm/ipmmu-vmsa.c
index 24b9e09a6b..0ccfa53255 100644
--- a/xen/drivers/passthrough/arm/ipmmu-vmsa.c
+++ b/xen/drivers/passthrough/arm/ipmmu-vmsa.c
@@ -201,7 +201,7 @@ static DEFINE_SPINLOCK(ipmmu_devices_lock);
 #define IMTTBCR_TSZ0_SHIFT             0
 
 #define IMTTLBR0              0x0010
-#define IMTTLBR0_TTBR_MASK    (0xfffff << 12)
+#define IMTTLBR0_TTBR_MASK    (0xfffffU << 12)
 #define IMTTUBR0              0x0014
 #define IMTTUBR0_TTBR_MASK    (0xff << 0)
 
-- 
2.34.1