linux-kernel - [PATCH] kvm/x86 : avoid shifting signed 32-bit value by 31 bits

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Message-Id: <1538675238-27356-1-git-send-email-penghao122@sina.com.cn>
Date:   Thu,  4 Oct 2018 13:47:18 -0400
From:   Peng Hao <penghao122@...a.com.cn>
To:     pbonzini@...hat.com, rkrcmar@...hat.com, tglx@...utronix.de,
        mingo@...hat.com, hpa@...or.com, joro@...tes.org
Cc:     linux-kernel@...r.kernel.org, kvm@...r.kernel.org, x86@...nel.org,
        Peng Hao <peng.hao2@....com.cn>
Subject: [PATCH]  kvm/x86 : avoid shifting signed 32-bit value by 31 bits


From: Peng Hao <peng.hao2@....com.cn>

  modify AVIC_LOGICAL_ID_ENTRY_VALID_MASK to unsigned

Signed-off-by: Peng Hao <peng.hao2@....com.cn>
---
 arch/x86/kvm/svm.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/arch/x86/kvm/svm.c b/arch/x86/kvm/svm.c
index d96092b..bf1ded4 100644
--- a/arch/x86/kvm/svm.c
+++ b/arch/x86/kvm/svm.c
@@ -262,7 +262,7 @@ struct amd_svm_iommu_ir {
 };
 
 #define AVIC_LOGICAL_ID_ENTRY_GUEST_PHYSICAL_ID_MASK	(0xFF)
-#define AVIC_LOGICAL_ID_ENTRY_VALID_MASK		(1 << 31)
+#define AVIC_LOGICAL_ID_ENTRY_VALID_MASK		(1UL << 31)
 
 #define AVIC_PHYSICAL_ID_ENTRY_HOST_PHYSICAL_ID_MASK	(0xFFULL)
 #define AVIC_PHYSICAL_ID_ENTRY_BACKING_PAGE_MASK	(0xFFFFFFFFFFULL << 12)
-- 
1.8.3.1