Fix the following UBSAN report:
======================================================================
UBSAN: Undefined behaviour in arch/x86/cpu/lapic.c:73:14
left shift of 1048575 by 12 places cannot be represented in type 'int'
======================================================================
Steps to reproduce the above:
* echo CONFIG_UBSAN=y >> configs/qemu-x86_defconfig
* make ARCH=x86 qemu-x86_defconfig all
* qemu-system-i386 --version
QEMU emulator version 2.5.0 (Debian 1:2.5+dfsg-5ubuntu10.31)
* qemu-system-i386 --nographic -bios u-boot.rom
Fixes: 98568f0fa96b ("x86: Import MSR/MTRR code from Linux")
Signed-off-by: Eugeniu Rosca <ero...@de.adit-jv.com>
---
Changes in v2:
- None. Newly pushed.
---
arch/x86/include/asm/msr-index.h | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/arch/x86/include/asm/msr-index.h b/arch/x86/include/asm/msr-index.h
index 9c1dbe61d596..d8b7b8013c74 100644
--- a/arch/x86/include/asm/msr-index.h
+++ b/arch/x86/include/asm/msr-index.h
@@ -370,7 +370,7 @@
#define MSR_IA32_APICBASE 0x0000001b
#define MSR_IA32_APICBASE_BSP (1<<8)
#define MSR_IA32_APICBASE_ENABLE (1<<11)
-#define MSR_IA32_APICBASE_BASE (0xfffff<<12)
+#define MSR_IA32_APICBASE_BASE (0xfffffUL << 12)
#define MSR_IA32_TSCDEADLINE 0x000006e0
--
2.18.0
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