linux-kernel - [PATCH 3.12 48/60] KVM: VMX: use correct vmcs_read/write for guest segment selector/base

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Date:   Tue, 14 Mar 2017 14:15:39 +0100
From:   Jiri Slaby <jslaby@...e.cz>
To:     stable@...r.kernel.org
Cc:     linux-kernel@...r.kernel.org,
        Chao Peng <chao.p.peng@...ux.intel.com>,
        Paolo Bonzini <pbonzini@...hat.com>,
        Jiri Slaby <jslaby@...e.cz>
Subject: [PATCH 3.12 48/60] KVM: VMX: use correct vmcs_read/write for guest segment selector/base

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

3.12-stable review patch.  If anyone has any objections, please let me know.

===============

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: Jiri Slaby <jslaby@...e.cz>
---
 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 c7f2b3c52d92..d9e567fc36c7 100644
--- a/arch/x86/kvm/vmx.c
+++ b/arch/x86/kvm/vmx.c
@@ -3123,7 +3123,7 @@ 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));
 }
-- 
2.12.0