* [PATCH] KVM: when entering real mode aling segment base to 16 bytes
@ 2010-12-27 12:58 Gleb Natapov
0 siblings, 0 replies; only message in thread
From: Gleb Natapov @ 2010-12-27 12:58 UTC (permalink / raw)
To: avi.marcelo; +Cc: kvm
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.
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2010-12-27 12:58 [PATCH] KVM: when entering real mode aling segment base to 16 bytes Gleb Natapov
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