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Re: [Xen-ia64-devel] [RFC][PATCH] support special domU optimisation's in
| To: | xen-ia64-devel@xxxxxxxxxxxxxxxxxxx |
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| Subject: | Re: [Xen-ia64-devel] [RFC][PATCH] support special domU optimisation's in the hypervisor |
| From: | Dietmar Hahn <dietmar.hahn@xxxxxxxxxxxxxxxxxxx> |
| Date: | Wed, 27 Jun 2007 14:41:20 +0200 |
| Delivery-date: | Wed, 27 Jun 2007 05:39:04 -0700 |
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Am Mittwoch, 27. Juni 2007 schrieb Dietmar Hahn:
> The next step is the patch for dom0/domU linux to switch this feature on.
I thought of the following interface in linux:
include/asm-ia64/hypercall.h:
static inline int
HYPERVISOR_opt_feature(int cmd, void *arg)
{
struct xencomm_handle *new_arg;
new_arg = xencomm_create_inline(arg);
return _hypercall2(int, opt_feature, cmd, new_arg);
}
A function with the following code to set the feature:
struct ia64_opt_feature optf;
optf.cmd = IA64_OPT_FEATURE_IDENTITY_MAPPING;
optf.on = IA64_OPT_FEATURE_ON;
optf.pgprot = pgprot_val(PAGE_KERNEL);
HYPERVISOR_opt_feature(IA64_OPT_FEATURE_IDENTITY_MAPPING, &optf);
Thanks.
Dietmar
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