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[Xen-devel] In VMCS, HOST_CR0.TS is always set 1. Why?
| To: | <steven@xxxxxxxxxxxxx>, <xen-devel@xxxxxxxxxxxxxxxxxxx> |
|---|---|
| Subject: | [Xen-devel] In VMCS, HOST_CR0.TS is always set 1. Why? |
| From: | "Cui, Dexuan" <dexuan.cui@xxxxxxxxx> |
| Date: | Wed, 14 Nov 2007 18:29:22 +0800 |
| Cc: | "Dong, Eddie" <eddie.dong@xxxxxxxxx> |
| Delivery-date: | Wed, 14 Nov 2007 02:31:35 -0800 |
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| Thread-index: | AcgmqTOKyZ7EfwTJRzWoK6/R3m1zig== |
| Thread-topic: | In VMCS, HOST_CR0.TS is always set 1. Why? |
> changeset 15216: 6f13c3be08fa http://xenbits.xensource.com/xen-unstable.hg?rev/6f13c3be08fa > --- a/xen/arch/x86/hvm/vmx/vmcs.c Mon Jun 04 15:41:32 2007 +0100 > +++ b/xen/arch/x86/hvm/vmx/vmcs.c Mon Jun 04 16:47:48 2007 +0100 > @@ -337,7 +337,7 @@ static void construct_vmcs(struct vcpu * > #endif > /* Host control registers. */ > - __vmwrite(HOST_CR0, read_cr0()); > + __vmwrite(HOST_CR0, read_cr0() | X86_CR0_TS); > __vmwrite(HOST_CR4, read_cr4()); > > /* Host CS:RIP. */ Hi Steven, The description of the changeset says "This fixes a number of subtle FP corruption issues within PV domains when running alongside VMX ones" -- can you tell me what the subtle issues are? Thanks! -- Dexuan _______________________________________________ Xen-devel mailing list Xen-devel@xxxxxxxxxxxxxxxxxxx http://lists.xensource.com/xen-devel |
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