From: Avi Kivity <avi@redhat.com>
To: Alexander Graf <agraf@suse.de>
Cc: Scott Wood <scottwood@freescale.com>,
Yoder Stuart-B08248 <B08248@freescale.com>,
"kvm-ppc@vger.kernel.org" <kvm-ppc@vger.kernel.org>,
"kvm@vger.kernel.org" <kvm@vger.kernel.org>,
"qemu-devel@nongnu.org" <qemu-devel@nongnu.org>
Subject: Re: RFC: New API for PPC for vcpu mmu access
Date: Mon, 07 Feb 2011 19:13:46 +0200 [thread overview]
Message-ID: <4D50284A.4020606@redhat.com> (raw)
In-Reply-To: <B1B59802-0A65-4F35-B3DD-CB10F44AF86D@suse.de>
On 02/03/2011 11:19 AM, Alexander Graf wrote:
> >
> > I have no idea what things will look like 10 years down the road, but
> > currently e500mc has 576 entries (512 TLB0, 64 TLB1).
>
> That sums up to 64 * 576 bytes, which is 36kb. Ouch. Certainly nothing we want to transfer every time qemu feels like resolving an EA.
You could have an ioctl to translate addresses (x86 had KVM_TRANSLATE or
similar), or have the TLB stored in user memory, so there is no need to
transfer it (on the other hand, you have to re-validate it every time
you peek at it).
--
error compiling committee.c: too many arguments to function
WARNING: multiple messages have this Message-ID (diff)
From: Avi Kivity <avi@redhat.com>
To: Alexander Graf <agraf@suse.de>
Cc: Scott Wood <scottwood@freescale.com>,
Yoder Stuart-B08248 <B08248@freescale.com>,
"kvm@vger.kernel.org" <kvm@vger.kernel.org>,
"kvm-ppc@vger.kernel.org" <kvm-ppc@vger.kernel.org>,
"qemu-devel@nongnu.org" <qemu-devel@nongnu.org>
Subject: [Qemu-devel] Re: RFC: New API for PPC for vcpu mmu access
Date: Mon, 07 Feb 2011 19:13:46 +0200 [thread overview]
Message-ID: <4D50284A.4020606@redhat.com> (raw)
In-Reply-To: <B1B59802-0A65-4F35-B3DD-CB10F44AF86D@suse.de>
On 02/03/2011 11:19 AM, Alexander Graf wrote:
> >
> > I have no idea what things will look like 10 years down the road, but
> > currently e500mc has 576 entries (512 TLB0, 64 TLB1).
>
> That sums up to 64 * 576 bytes, which is 36kb. Ouch. Certainly nothing we want to transfer every time qemu feels like resolving an EA.
You could have an ioctl to translate addresses (x86 had KVM_TRANSLATE or
similar), or have the TLB stored in user memory, so there is no need to
transfer it (on the other hand, you have to re-validate it every time
you peek at it).
--
error compiling committee.c: too many arguments to function
WARNING: multiple messages have this Message-ID (diff)
From: Avi Kivity <avi@redhat.com>
To: Alexander Graf <agraf@suse.de>
Cc: Scott Wood <scottwood@freescale.com>,
Yoder Stuart-B08248 <B08248@freescale.com>,
"kvm-ppc@vger.kernel.org" <kvm-ppc@vger.kernel.org>,
"kvm@vger.kernel.org" <kvm@vger.kernel.org>,
"qemu-devel@nongnu.org" <qemu-devel@nongnu.org>
Subject: Re: RFC: New API for PPC for vcpu mmu access
Date: Mon, 07 Feb 2011 17:13:46 +0000 [thread overview]
Message-ID: <4D50284A.4020606@redhat.com> (raw)
In-Reply-To: <B1B59802-0A65-4F35-B3DD-CB10F44AF86D@suse.de>
On 02/03/2011 11:19 AM, Alexander Graf wrote:
> >
> > I have no idea what things will look like 10 years down the road, but
> > currently e500mc has 576 entries (512 TLB0, 64 TLB1).
>
> That sums up to 64 * 576 bytes, which is 36kb. Ouch. Certainly nothing we want to transfer every time qemu feels like resolving an EA.
You could have an ioctl to translate addresses (x86 had KVM_TRANSLATE or
similar), or have the TLB stored in user memory, so there is no need to
transfer it (on the other hand, you have to re-validate it every time
you peek at it).
--
error compiling committee.c: too many arguments to function
next prev parent reply other threads:[~2011-02-07 17:13 UTC|newest]
Thread overview: 112+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-02-02 20:33 RFC: New API for PPC for vcpu mmu access Yoder Stuart-B08248
2011-02-02 20:33 ` Yoder Stuart-B08248
2011-02-02 20:33 ` [Qemu-devel] " Yoder Stuart-B08248
2011-02-02 21:33 ` Alexander Graf
2011-02-02 21:33 ` Alexander Graf
2011-02-02 21:33 ` [Qemu-devel] " Alexander Graf
2011-02-02 22:08 ` Scott Wood
2011-02-02 22:08 ` Scott Wood
2011-02-02 22:08 ` [Qemu-devel] " Scott Wood
2011-02-03 9:19 ` Alexander Graf
2011-02-03 9:19 ` Alexander Graf
2011-02-03 9:19 ` [Qemu-devel] " Alexander Graf
2011-02-04 22:33 ` Scott Wood
2011-02-04 22:33 ` Scott Wood
2011-02-04 22:33 ` [Qemu-devel] " Scott Wood
2011-02-07 15:43 ` Alexander Graf
2011-02-07 15:43 ` Alexander Graf
2011-02-07 15:43 ` [Qemu-devel] " Alexander Graf
2011-02-07 16:40 ` Yoder Stuart-B08248
2011-02-07 16:40 ` Yoder Stuart-B08248
2011-02-07 16:40 ` [Qemu-devel] " Yoder Stuart-B08248
2011-02-07 16:49 ` Alexander Graf
2011-02-07 16:49 ` Alexander Graf
2011-02-07 16:49 ` [Qemu-devel] " Alexander Graf
2011-02-07 18:52 ` Scott Wood
2011-02-07 18:52 ` Scott Wood
2011-02-07 18:52 ` [Qemu-devel] " Scott Wood
2011-02-07 19:56 ` Yoder Stuart-B08248
2011-02-07 19:56 ` Yoder Stuart-B08248
2011-02-07 19:56 ` [Qemu-devel] " Yoder Stuart-B08248
2011-02-09 17:03 ` Alexander Graf
2011-02-09 17:03 ` Alexander Graf
2011-02-09 17:03 ` [Qemu-devel] " Alexander Graf
2011-02-07 20:15 ` Scott Wood
2011-02-07 20:15 ` Scott Wood
2011-02-07 20:15 ` [Qemu-devel] " Scott Wood
2011-02-09 17:21 ` Alexander Graf
2011-02-09 17:21 ` Alexander Graf
2011-02-09 17:21 ` [Qemu-devel] " Alexander Graf
2011-02-09 23:09 ` Scott Wood
2011-02-09 23:09 ` Scott Wood
2011-02-09 23:09 ` [Qemu-devel] " Scott Wood
2011-02-10 11:45 ` Alexander Graf
2011-02-10 11:45 ` Alexander Graf
2011-02-10 11:45 ` [Qemu-devel] " Alexander Graf
2011-02-10 18:51 ` Scott Wood
2011-02-10 18:51 ` Scott Wood
2011-02-10 18:51 ` [Qemu-devel] " Scott Wood
2011-02-11 0:20 ` Alexander Graf
2011-02-11 0:20 ` Alexander Graf
2011-02-11 0:20 ` [Qemu-devel] " Alexander Graf
2011-02-11 0:22 ` Alexander Graf
2011-02-11 0:22 ` Alexander Graf
2011-02-11 0:22 ` [Qemu-devel] " Alexander Graf
2011-02-11 1:41 ` Alexander Graf
2011-02-11 1:41 ` Alexander Graf
2011-02-11 1:41 ` [Qemu-devel] " Alexander Graf
2011-02-11 20:53 ` Scott Wood
2011-02-11 20:53 ` Scott Wood
2011-02-11 20:53 ` [Qemu-devel] " Scott Wood
2011-02-11 21:07 ` Alexander Graf
2011-02-11 21:07 ` Alexander Graf
2011-02-11 21:07 ` [Qemu-devel] " Alexander Graf
2011-02-12 0:57 ` Scott Wood
2011-02-12 0:57 ` Scott Wood
2011-02-12 0:57 ` [Qemu-devel] " Scott Wood
2011-02-13 22:43 ` Alexander Graf
2011-02-13 22:43 ` Alexander Graf
2011-02-13 22:43 ` [Qemu-devel] " Alexander Graf
2011-02-14 17:11 ` Scott Wood
2011-02-14 17:11 ` Scott Wood
2011-02-14 17:11 ` [Qemu-devel] " Scott Wood
2011-02-14 20:19 ` Alexander Graf
2011-02-14 20:19 ` Alexander Graf
2011-02-14 20:19 ` [Qemu-devel] " Alexander Graf
2011-02-14 21:16 ` Scott Wood
2011-02-14 21:16 ` Scott Wood
2011-02-14 21:16 ` [Qemu-devel] " Scott Wood
2011-02-14 23:39 ` Alexander Graf
2011-02-14 23:39 ` Alexander Graf
2011-02-14 23:39 ` [Qemu-devel] " Alexander Graf
2011-02-14 23:49 ` Scott Wood
2011-02-14 23:49 ` Scott Wood
2011-02-14 23:49 ` [Qemu-devel] " Scott Wood
2011-02-15 0:00 ` Alexander Graf
2011-02-15 0:00 ` Alexander Graf
2011-02-15 0:00 ` [Qemu-devel] " Alexander Graf
2011-02-07 17:13 ` Avi Kivity [this message]
2011-02-07 17:13 ` Avi Kivity
2011-02-07 17:13 ` [Qemu-devel] " Avi Kivity
2011-02-07 17:30 ` Yoder Stuart-B08248
2011-02-07 17:30 ` Yoder Stuart-B08248
2011-02-07 17:30 ` [Qemu-devel] " Yoder Stuart-B08248
2011-02-08 9:10 ` Avi Kivity
2011-02-08 9:10 ` Avi Kivity
2011-02-08 9:10 ` [Qemu-devel] " Avi Kivity
2011-02-10 0:04 ` Scott Wood
2011-02-10 0:04 ` Scott Wood
2011-02-10 0:04 ` [Qemu-devel] " Scott Wood
2011-02-10 11:55 ` Alexander Graf
2011-02-10 11:55 ` Alexander Graf
2011-02-10 11:55 ` [Qemu-devel] " Alexander Graf
2011-02-10 12:31 ` Edgar E. Iglesias
2011-02-10 12:31 ` Edgar E. Iglesias
2011-02-10 12:31 ` [Qemu-devel] " Edgar E. Iglesias
2011-02-02 22:34 ` Yoder Stuart-B08248
2011-02-02 22:34 ` Yoder Stuart-B08248
2011-02-02 22:34 ` [Qemu-devel] " Yoder Stuart-B08248
2011-02-03 9:29 ` Alexander Graf
2011-02-03 9:29 ` Alexander Graf
2011-02-03 9:29 ` [Qemu-devel] " Alexander Graf
-- strict thread matches above, loose matches on Subject: below --
2011-02-02 20:30 Yoder Stuart-B08248
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