From: Gleb Natapov <gleb@redhat.com>
To: avi.marcelo@redhat.com
Cc: kvm@vger.kernel.org
Subject: [PATCH] KVM: when entering real mode aling segment base to 16 bytes
Date: Mon, 27 Dec 2010 14:58:41 +0200 [thread overview]
Message-ID: <20101227125841.GJ2231@redhat.com> (raw)
VMX checks that base is equal segment shifted 4 bites left. Otherwise
guest entry fails.
Signed-off-by: Gleb Natapov <gleb@redhat.com>
diff --git a/arch/x86/kvm/vmx.c b/arch/x86/kvm/vmx.c
index 2260783..45014ba 100644
--- a/arch/x86/kvm/vmx.c
+++ b/arch/x86/kvm/vmx.c
@@ -1736,7 +1736,7 @@ static void fix_rmode_seg(int seg, struct kvm_save_segment *save)
save->limit = vmcs_read32(sf->limit);
save->ar = vmcs_read32(sf->ar_bytes);
vmcs_write16(sf->selector, save->base >> 4);
- vmcs_write32(sf->base, save->base & 0xfffff);
+ vmcs_write32(sf->base, save->base & 0xffff0);
vmcs_write32(sf->limit, 0xffff);
vmcs_write32(sf->ar_bytes, 0xf3);
}
--
Gleb.
reply other threads:[~2010-12-27 12:58 UTC|newest]
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