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xen-ia64-devel
[Xen-ia64-devel] RE: [Patch] Add uaccess utility for VTI
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To: |
"Tian, Kevin" <kevin.tian@xxxxxxxxx> |
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Subject: |
[Xen-ia64-devel] RE: [Patch] Add uaccess utility for VTI |
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From: |
"Magenheimer, Dan (HP Labs Fort Collins)" <dan.magenheimer@xxxxxx> |
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Date: |
Tue, 21 Jun 2005 21:28:15 -0700 |
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Cc: |
"Ling, Xiaofeng" <xiaofeng.ling@xxxxxxxxx>, "Li, Chengyuan" <chengyuan.li@xxxxxxxxx>, xen-ia64-devel@xxxxxxxxxxxxxxxxxxx |
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Wed, 22 Jun 2005 04:27:08 +0000 |
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Thread-topic: |
[Patch] Add uaccess utility for VTI |
> OK, now back to XEN/ia64(VTI), we implement Xen in different
> address space as Xen/x86(VTx). That means, Xen resides with
> different rid as guest, which makes all guest TLB entries
> useless for direct access then. The only way is to search
> vTLB and then use __va() style to access if hit. That's why
> you see our version of copy_from/to_user not like its initial intent.
So Xen/ia64(VTI) uses eight different region registers? I
assume the hardware automatically switches the region registers
at vm_entry and vm_exit (much like bank0/bank1 r16-r31 are switched)?
Is it possible to tell the hardware to NOT switch rr0-rr6?
Thanks,
Dan
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- [Xen-ia64-devel] RE: [Patch] Add uaccess utility for VTI, Magenheimer, Dan (HP Labs Fort Collins)
- [Xen-ia64-devel] RE: [Patch] Add uaccess utility for VTI, Tian, Kevin
- [Xen-ia64-devel] RE: [Patch] Add uaccess utility for VTI, Magenheimer, Dan (HP Labs Fort Collins)
- [Xen-ia64-devel] RE: [Patch] Add uaccess utility for VTI, Tian, Kevin
- [Xen-ia64-devel] RE: [Patch] Add uaccess utility for VTI,
Magenheimer, Dan (HP Labs Fort Collins) <=
- [Xen-ia64-devel] RE: [Patch] Add uaccess utility for VTI, Tian, Kevin
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