linux-kernel - [PATCH 3.10 164/268] KVM: VMX: use correct vmcs_read/write for guest segment selector/base

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Date:   Mon, 19 Jun 2017 20:31:03 +0200
From:   Willy Tarreau <w@....eu>
To:     linux-kernel@...r.kernel.org, stable@...r.kernel.org,
        linux@...ck-us.net
Cc:     Chao Peng <chao.p.peng@...ux.intel.com>,
        Paolo Bonzini <pbonzini@...hat.com>, Willy Tarreau <w@....eu>
Subject: [PATCH 3.10 164/268] KVM: VMX: use correct vmcs_read/write for guest segment selector/base

From: Chao Peng <chao.p.peng@...ux.intel.com>

commit 96794e4ed4d758272c486e1529e431efb7045265 upstream.

Guest segment selector is 16 bit field and guest segment base is natural
width field. Fix two incorrect invocations accordingly.

Without this patch, build fails when aggressive inlining is used with ICC.

[js] no vmx_dump_sel in 3.12

Signed-off-by: Chao Peng <chao.p.peng@...ux.intel.com>
Signed-off-by: Paolo Bonzini <pbonzini@...hat.com>
Signed-off-by: Willy Tarreau <w@....eu>
---
 arch/x86/kvm/vmx.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/arch/x86/kvm/vmx.c b/arch/x86/kvm/vmx.c
index 7e9ca58..b4fa8a9 100644
--- a/arch/x86/kvm/vmx.c
+++ b/arch/x86/kvm/vmx.c
@@ -3074,7 +3074,7 @@ static void fix_rmode_seg(int seg, struct kvm_segment *save)
 	}
 
 	vmcs_write16(sf->selector, var.selector);
-	vmcs_write32(sf->base, var.base);
+	vmcs_writel(sf->base, var.base);
 	vmcs_write32(sf->limit, var.limit);
 	vmcs_write32(sf->ar_bytes, vmx_segment_access_rights(&var));
 }
-- 
2.8.0.rc2.1.gbe9624a