[Xen-ia64-devel] RE: [PATCH] use shared version of iva/dcr

["Magenheimer, Dan (HP Labs Fort Collins)" <dan.magenheimer@xxxxxx>]

For dcr, this may not matter, but for iva, there
are some semantics that need to be checked every
virtual interrupt delivery.  At a minimum, if virtual
iva is not private, bits 0-14 should be zeroed
before every use by Xen, correct?

> -----Original Message-----
> From: Matt Chapman [mailto:matthewc@xxxxxxxxxxxxxxx] 
> Sent: Wednesday, August 17, 2005 9:07 PM
> To: Magenheimer, Dan (HP Labs Fort Collins)
> Cc: xen-ia64-devel@xxxxxxxxxxxxxxxxxxx
> Subject: [PATCH] use shared version of iva/dcr
> 
> This patch makes Xen use the iva and dcr located in mapped_regs_t and
> eliminates the private versions in arch_domain.  There seems to be no
> reason to involve the hypervisor when accessing these registers, at
> worst the guest kernel can shoot itself in the foot.
> 
> Matt
> 
> Signed-off-by: Matthew Chapman <matthewc@xxxxxx>
> 

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