[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

Re: [Xen-devel] [RFC 00/10] xen/arm: Implement the hypercall handling in assembly

To: Julien Grall <julien.grall@xxxxxxxxxx>, <xen-devel@xxxxxxxxxxxxxxxxxxxx>
From: Andrew Cooper <andrew.cooper3@xxxxxxxxxx>
Date: Tue, 15 Dec 2015 18:33:27 +0000
Cc: ian.campbell@xxxxxxxxxx, stefano.stabellini@xxxxxxxxxxxxx
Delivery-date: Tue, 15 Dec 2015 18:33:47 +0000
List-id: Xen developer discussion <xen-devel.lists.xen.org>

On 15/12/15 17:51, Julien Grall wrote:
> Hi all,
>
> This patch aims is a first attempt to write the hypercall dispatch in assembly
> in order to avoid reloading the hypercall arguments from the stack.

Why?  A couple of stack operations are in the noise, performance wise.

I have half a patch series to do exactly the opposite for x86 PV guests,
as C is far more maintainable than asm.

~Andrew

_______________________________________________
Xen-devel mailing list
Xen-devel@xxxxxxxxxxxxx
http://lists.xen.org/xen-devel

Follow-Ups:
- Re: [Xen-devel] [RFC 00/10] xen/arm: Implement the hypercall handling in assembly
  - From: Ian Campbell

References:
- [Xen-devel] [RFC 00/10] xen/arm: Implement the hypercall handling in assembly
  - From: Julien Grall

Prev by Date: Re: [Xen-devel] [PATCH RFC 0/3] Xen on Virtio
Next by Date: Re: [Xen-devel] [PATCH RFC XEN v1 06/14] xen: arm: Add some basic platform info to save header
Previous by thread: [Xen-devel] [RFC 10/10] xen/arm: Factorize the C code to dispatch HVC
Next by thread: Re: [Xen-devel] [RFC 00/10] xen/arm: Implement the hypercall handling in assembly
Index(es):
- Date
- Thread

Lists.xenproject.org is hosted with RackSpace, monitoring our
servers 24x7x365 and backed by RackSpace's Fanatical Support®.