From: Alexander Graf <agraf-l3A5Bk7waGM@public.gmane.org>
To: MJ embd <mj.embd-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
Cc: kvm-ppc-u79uwXL29TY76Z2rM5mHXA@public.gmane.org,
KVM list <kvm-u79uwXL29TY76Z2rM5mHXA@public.gmane.org>,
linuxppc-dev
<linuxppc-dev-uLR06cmDAlY/bJ5BZ2RsiQ@public.gmane.org>
Subject: Re: [PATCH 27/27] KVM: PPC: Add Documentation about PV interface
Date: Fri, 9 Jul 2010 11:15:28 +0200 [thread overview]
Message-ID: <B3EA423C-6CAA-430C-BC12-86153B6EC98D@suse.de> (raw)
In-Reply-To: <AANLkTil6RekYBNnpM2MjSH7rcrHQZdHRwK5cBrvKQKhM-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>
On 09.07.2010, at 11:11, MJ embd wrote:
> On Thu, Jul 1, 2010 at 4:13 PM, Alexander Graf <agraf-l3A5Bk7waGM@public.gmane.org> wrote:
>> We just introduced a new PV interface that screams for documentation. So here
>> it is - a shiny new and awesome text file describing the internal works of
>> the PPC KVM paravirtual interface.
>>
>> Signed-off-by: Alexander Graf <agraf-l3A5Bk7waGM@public.gmane.org>
>>
>> +
>> +
>> +Some instructions require more logic to determine what's going on than a load
>> +or store instruction can deliver. To enable patching of those, we keep some
>> +RAM around where we can live translate instructions to. What happens is the
>> +following:
>> +
>> + 1) copy emulation code to memory
>> + 2) patch that code to fit the emulated instruction
>> + 3) patch that code to return to the original pc + 4
>> + 4) patch the original instruction to branch to the new code
>> +
>> +That way we can inject an arbitrary amount of code as replacement for a single
>> +instruction. This allows us to check for pending interrupts when setting EE=1
>> +for example.
>> +
>
> Which patch does this mapping ? Can you please point to that.
The branch patching is in patch 22/27. For the respective users, see patch 23-26/27.
Alex
WARNING: multiple messages have this Message-ID (diff)
From: Alexander Graf <agraf@suse.de>
To: MJ embd <mj.embd@gmail.com>
Cc: linuxppc-dev <linuxppc-dev@lists.ozlabs.org>,
KVM list <kvm@vger.kernel.org>,
kvm-ppc@vger.kernel.org
Subject: Re: [PATCH 27/27] KVM: PPC: Add Documentation about PV interface
Date: Fri, 9 Jul 2010 11:15:28 +0200 [thread overview]
Message-ID: <B3EA423C-6CAA-430C-BC12-86153B6EC98D@suse.de> (raw)
In-Reply-To: <AANLkTil6RekYBNnpM2MjSH7rcrHQZdHRwK5cBrvKQKhM@mail.gmail.com>
On 09.07.2010, at 11:11, MJ embd wrote:
> On Thu, Jul 1, 2010 at 4:13 PM, Alexander Graf <agraf@suse.de> wrote:
>> We just introduced a new PV interface that screams for documentation. =
So here
>> it is - a shiny new and awesome text file describing the internal =
works of
>> the PPC KVM paravirtual interface.
>>=20
>> Signed-off-by: Alexander Graf <agraf@suse.de>
>>=20
>> +
>> +
>> +Some instructions require more logic to determine what's going on =
than a load
>> +or store instruction can deliver. To enable patching of those, we =
keep some
>> +RAM around where we can live translate instructions to. What happens =
is the
>> +following:
>> +
>> + 1) copy emulation code to memory
>> + 2) patch that code to fit the emulated instruction
>> + 3) patch that code to return to the original pc + 4
>> + 4) patch the original instruction to branch to the new code
>> +
>> +That way we can inject an arbitrary amount of code as replacement =
for a single
>> +instruction. This allows us to check for pending interrupts when =
setting EE=3D1
>> +for example.
>> +
>=20
> Which patch does this mapping ? Can you please point to that.
The branch patching is in patch 22/27. For the respective users, see =
patch 23-26/27.
Alex
WARNING: multiple messages have this Message-ID (diff)
From: Alexander Graf <agraf@suse.de>
To: MJ embd <mj.embd-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
Cc: kvm-ppc-u79uwXL29TY76Z2rM5mHXA@public.gmane.org,
KVM list <kvm-u79uwXL29TY76Z2rM5mHXA@public.gmane.org>,
linuxppc-dev
<linuxppc-dev-uLR06cmDAlY/bJ5BZ2RsiQ@public.gmane.org>
Subject: Re: [PATCH 27/27] KVM: PPC: Add Documentation about PV interface
Date: Fri, 09 Jul 2010 09:15:28 +0000 [thread overview]
Message-ID: <B3EA423C-6CAA-430C-BC12-86153B6EC98D@suse.de> (raw)
In-Reply-To: <AANLkTil6RekYBNnpM2MjSH7rcrHQZdHRwK5cBrvKQKhM-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>
On 09.07.2010, at 11:11, MJ embd wrote:
> On Thu, Jul 1, 2010 at 4:13 PM, Alexander Graf <agraf@suse.de> wrote:
>> We just introduced a new PV interface that screams for documentation. So here
>> it is - a shiny new and awesome text file describing the internal works of
>> the PPC KVM paravirtual interface.
>>
>> Signed-off-by: Alexander Graf <agraf@suse.de>
>>
>> +
>> +
>> +Some instructions require more logic to determine what's going on than a load
>> +or store instruction can deliver. To enable patching of those, we keep some
>> +RAM around where we can live translate instructions to. What happens is the
>> +following:
>> +
>> + 1) copy emulation code to memory
>> + 2) patch that code to fit the emulated instruction
>> + 3) patch that code to return to the original pc + 4
>> + 4) patch the original instruction to branch to the new code
>> +
>> +That way we can inject an arbitrary amount of code as replacement for a single
>> +instruction. This allows us to check for pending interrupts when setting EE=1
>> +for example.
>> +
>
> Which patch does this mapping ? Can you please point to that.
The branch patching is in patch 22/27. For the respective users, see patch 23-26/27.
Alex
next prev parent reply other threads:[~2010-07-09 9:15 UTC|newest]
Thread overview: 171+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-07-01 10:42 [PATCH 00/27] KVM PPC PV framework Alexander Graf
2010-07-01 10:42 ` Alexander Graf
2010-07-01 10:42 ` Alexander Graf
2010-07-01 10:42 ` [PATCH 02/27] KVM: PPC: Convert MSR to shared page Alexander Graf
2010-07-01 10:42 ` Alexander Graf
2010-07-01 10:42 ` Alexander Graf
2010-07-01 10:42 ` [PATCH 03/27] KVM: PPC: Convert DSISR " Alexander Graf
2010-07-01 10:42 ` Alexander Graf
2010-07-01 10:42 ` Alexander Graf
2010-07-01 10:42 ` [PATCH 04/27] KVM: PPC: Convert DAR " Alexander Graf
2010-07-01 10:42 ` Alexander Graf
2010-07-01 10:42 ` Alexander Graf
2010-07-01 10:42 ` [PATCH 05/27] KVM: PPC: Convert SRR0 and SRR1 " Alexander Graf
2010-07-01 10:42 ` Alexander Graf
2010-07-01 10:42 ` Alexander Graf
2010-07-01 10:42 ` [PATCH 08/27] KVM: PPC: Add PV guest critical sections Alexander Graf
2010-07-01 10:42 ` Alexander Graf
2010-07-01 10:42 ` Alexander Graf
2010-07-01 10:42 ` [PATCH 09/27] KVM: PPC: Add PV guest scratch registers Alexander Graf
2010-07-01 10:42 ` Alexander Graf
2010-07-01 10:42 ` Alexander Graf
2010-07-01 10:42 ` [PATCH 11/27] KVM: PPC: Make RMO a define Alexander Graf
2010-07-01 10:42 ` Alexander Graf
2010-07-01 10:42 ` Alexander Graf
[not found] ` <1277980982-12433-12-git-send-email-agraf-l3A5Bk7waGM@public.gmane.org>
2010-07-02 16:23 ` Segher Boessenkool
2010-07-02 16:23 ` Segher Boessenkool
2010-07-02 16:23 ` Segher Boessenkool
2010-07-01 10:42 ` [PATCH 14/27] KVM: PPC: Magic Page BookE support Alexander Graf
2010-07-01 10:42 ` Alexander Graf
2010-07-01 10:42 ` Alexander Graf
[not found] ` <1277980982-12433-15-git-send-email-agraf-l3A5Bk7waGM@public.gmane.org>
2010-07-01 11:18 ` Josh Boyer
2010-07-01 11:18 ` Josh Boyer
2010-07-01 11:18 ` Josh Boyer
[not found] ` <20100701111823.GE7756-jnIq6iUNB1CO8iYQgJmm/0EOCMrvLtNR@public.gmane.org>
2010-07-01 12:25 ` Alexander Graf
2010-07-01 12:25 ` Alexander Graf
2010-07-01 12:25 ` Alexander Graf
2010-07-12 11:24 ` Liu Yu-B13201
2010-07-12 11:24 ` Liu Yu-B13201
2010-07-12 11:24 ` Liu Yu-B13201
2010-07-01 10:42 ` [PATCH 15/27] KVM: PPC: Expose magic page support to guest Alexander Graf
2010-07-01 10:42 ` Alexander Graf
2010-07-01 10:42 ` Alexander Graf
2010-07-01 10:42 ` [PATCH 17/27] KVM: PPC: Generic KVM PV guest support Alexander Graf
2010-07-01 10:42 ` Alexander Graf
2010-07-01 10:42 ` Alexander Graf
2010-07-01 10:42 ` [PATCH 18/27] KVM: PPC: KVM PV guest stubs Alexander Graf
2010-07-01 10:42 ` Alexander Graf
2010-07-01 10:42 ` Alexander Graf
2010-07-01 10:42 ` [PATCH 19/27] KVM: PPC: PV instructions to loads and stores Alexander Graf
2010-07-01 10:42 ` Alexander Graf
2010-07-01 10:42 ` Alexander Graf
2010-07-01 10:42 ` [PATCH 21/27] KVM: PPC: Introduce kvm_tmp framework Alexander Graf
2010-07-01 10:42 ` Alexander Graf
2010-07-01 10:42 ` Alexander Graf
[not found] ` <1277980982-12433-1-git-send-email-agraf-l3A5Bk7waGM@public.gmane.org>
2010-07-01 10:42 ` [PATCH 01/27] KVM: PPC: Introduce shared page Alexander Graf
2010-07-01 10:42 ` Alexander Graf
2010-07-01 10:42 ` Alexander Graf
2010-07-01 10:42 ` [PATCH 06/27] KVM: PPC: Convert SPRG[0-4] to " Alexander Graf
2010-07-01 10:42 ` Alexander Graf
2010-07-01 10:42 ` Alexander Graf
2010-07-01 10:42 ` [PATCH 07/27] KVM: PPC: Implement hypervisor interface Alexander Graf
2010-07-01 10:42 ` Alexander Graf
2010-07-01 10:42 ` Alexander Graf
2010-07-01 10:42 ` [PATCH 10/27] KVM: PPC: Tell guest about pending interrupts Alexander Graf
2010-07-01 10:42 ` Alexander Graf
2010-07-01 10:42 ` Alexander Graf
2010-07-01 10:42 ` [PATCH 12/27] KVM: PPC: First magic page steps Alexander Graf
2010-07-01 10:42 ` Alexander Graf
2010-07-01 10:42 ` Alexander Graf
2010-07-01 10:42 ` [PATCH 13/27] KVM: PPC: Magic Page Book3s support Alexander Graf
2010-07-01 10:42 ` Alexander Graf
2010-07-01 10:42 ` Alexander Graf
[not found] ` <1277980982-12433-14-git-send-email-agraf-l3A5Bk7waGM@public.gmane.org>
2010-07-02 15:37 ` Alexander Graf
2010-07-02 15:37 ` Alexander Graf
2010-07-02 15:37 ` Alexander Graf
[not found] ` <4C2E07AC.4010801-l3A5Bk7waGM@public.gmane.org>
2010-07-04 9:42 ` Avi Kivity
2010-07-04 9:42 ` Avi Kivity
2010-07-04 9:42 ` Avi Kivity
2010-07-01 10:42 ` [PATCH 16/27] KVM: Move kvm_guest_init out of generic code Alexander Graf
2010-07-01 10:42 ` Alexander Graf
2010-07-01 10:42 ` Alexander Graf
[not found] ` <1277980982-12433-17-git-send-email-agraf-l3A5Bk7waGM@public.gmane.org>
2010-07-02 7:41 ` Geert Uytterhoeven
2010-07-02 7:41 ` Geert Uytterhoeven
2010-07-02 7:41 ` Geert Uytterhoeven
2010-07-02 7:44 ` Alexander Graf
2010-07-02 7:44 ` Alexander Graf
2010-07-02 7:44 ` Alexander Graf
2010-07-01 10:42 ` [PATCH 20/27] KVM: PPC: PV tlbsync to nop Alexander Graf
2010-07-01 10:42 ` Alexander Graf
2010-07-01 10:42 ` Alexander Graf
2010-07-01 10:42 ` [PATCH 22/27] KVM: PPC: Introduce branch patching helper Alexander Graf
2010-07-01 10:42 ` Alexander Graf
2010-07-01 10:42 ` Alexander Graf
2010-07-01 10:43 ` [PATCH 25/27] KVM: PPC: PV mtmsrd L=0 and mtmsr Alexander Graf
2010-07-01 10:43 ` Alexander Graf
2010-07-01 10:43 ` Alexander Graf
2010-07-01 10:43 ` [PATCH 26/27] KVM: PPC: PV wrteei Alexander Graf
2010-07-01 10:43 ` Alexander Graf
2010-07-01 10:43 ` Alexander Graf
2010-07-09 4:57 ` [PATCH 00/27] KVM PPC PV framework MJ embd
2010-07-09 4:57 ` MJ embd
2010-07-09 4:57 ` MJ embd
2010-07-09 6:33 ` Alexander Graf
2010-07-09 6:33 ` Alexander Graf
2010-07-09 6:33 ` Alexander Graf
2010-07-01 10:42 ` [PATCH 23/27] KVM: PPC: PV assembler helpers Alexander Graf
2010-07-01 10:42 ` Alexander Graf
2010-07-01 10:42 ` Alexander Graf
2010-07-01 10:42 ` [PATCH 24/27] KVM: PPC: PV mtmsrd L=1 Alexander Graf
2010-07-01 10:42 ` Alexander Graf
2010-07-01 10:42 ` Alexander Graf
2010-07-01 10:43 ` [PATCH 27/27] KVM: PPC: Add Documentation about PV interface Alexander Graf
2010-07-01 10:43 ` Alexander Graf
2010-07-01 10:43 ` Alexander Graf
[not found] ` <1277980982-12433-28-git-send-email-agraf-l3A5Bk7waGM@public.gmane.org>
2010-07-02 16:27 ` Segher Boessenkool
2010-07-02 16:27 ` Segher Boessenkool
2010-07-02 16:27 ` Segher Boessenkool
2010-07-02 18:41 ` Alexander Graf
2010-07-02 18:41 ` Alexander Graf
2010-07-02 18:41 ` Alexander Graf
[not found] ` <A98DA9FC-DC42-452E-BD44-5F86D1707BF0-l3A5Bk7waGM@public.gmane.org>
2010-07-03 22:42 ` Benjamin Herrenschmidt
2010-07-03 22:42 ` Benjamin Herrenschmidt
2010-07-03 22:42 ` Benjamin Herrenschmidt
2010-07-04 9:04 ` Alexander Graf
2010-07-04 9:04 ` Alexander Graf
2010-07-04 9:04 ` Alexander Graf
[not found] ` <EB2E1C5B-118B-481B-83D6-44CFAA2E55D3-XVmvHMARGAS8U2dJNN8I7kB+6BGkLq7r@public.gmane.org>
2010-07-03 22:41 ` Benjamin Herrenschmidt
2010-07-03 22:41 ` Benjamin Herrenschmidt
2010-07-03 22:41 ` Benjamin Herrenschmidt
2010-07-04 9:04 ` Alexander Graf
2010-07-04 9:04 ` Alexander Graf
2010-07-04 9:04 ` Alexander Graf
2010-07-04 9:10 ` Avi Kivity
2010-07-04 9:10 ` Avi Kivity
2010-07-04 9:10 ` Avi Kivity
[not found] ` <4C305001.7060301-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org>
2010-07-04 9:17 ` Alexander Graf
2010-07-04 9:17 ` Alexander Graf
2010-07-04 9:17 ` Alexander Graf
[not found] ` <40488555-C73E-4C04-BFAD-31ED99CDBBDA-l3A5Bk7waGM@public.gmane.org>
2010-07-04 9:30 ` Alexander Graf
2010-07-04 9:30 ` Alexander Graf
2010-07-04 9:30 ` Alexander Graf
[not found] ` <486564E7-7942-4021-8EB2-67DC4E56580D-l3A5Bk7waGM@public.gmane.org>
2010-07-04 9:41 ` Avi Kivity
2010-07-04 9:41 ` Avi Kivity
2010-07-04 9:41 ` Avi Kivity
2010-07-04 9:37 ` Avi Kivity
2010-07-04 9:37 ` Avi Kivity
2010-07-04 9:37 ` Avi Kivity
2010-07-02 17:59 ` Hollis Blanchard
2010-07-02 17:59 ` Hollis Blanchard
2010-07-02 17:59 ` Hollis Blanchard
2010-07-02 18:47 ` Alexander Graf
2010-07-02 18:47 ` Alexander Graf
2010-07-02 18:47 ` Alexander Graf
[not found] ` <3085B58A-01A1-4B5C-A0E7-024DCFDFD4B2-l3A5Bk7waGM@public.gmane.org>
2010-07-02 19:10 ` Scott Wood
2010-07-02 19:10 ` Scott Wood
2010-07-02 19:10 ` Scott Wood
[not found] ` <20100702141003.75302a9a-1MYqz8GpK7RekFaExTCHk1jVikpgYyvb5NbjCUgZEJk@public.gmane.org>
2010-07-04 9:02 ` Alexander Graf
2010-07-04 9:02 ` Alexander Graf
2010-07-04 9:02 ` Alexander Graf
2010-07-09 9:11 ` MJ embd
2010-07-09 9:23 ` MJ embd
2010-07-09 9:11 ` MJ embd
[not found] ` <AANLkTil6RekYBNnpM2MjSH7rcrHQZdHRwK5cBrvKQKhM-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>
2010-07-09 9:15 ` Alexander Graf [this message]
2010-07-09 9:15 ` Alexander Graf
2010-07-09 9:15 ` Alexander Graf
2010-07-02 16:22 ` [PATCH 00/27] KVM PPC PV framework Segher Boessenkool
2010-07-02 16:22 ` Segher Boessenkool
2010-07-02 16:22 ` Segher Boessenkool
[not found] ` <82C19122-91B6-4F91-9EF0-BEA2759A349D-XVmvHMARGAS8U2dJNN8I7kB+6BGkLq7r@public.gmane.org>
2010-07-02 16:59 ` Alexander Graf
2010-07-02 16:59 ` Alexander Graf
2010-07-02 16:59 ` Alexander Graf
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