Re: [PATCH 27/27] KVM: PPC: Add Documentation about PV interface

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From: Alexander Graf

Subject: Re: [PATCH 27/27] KVM: PPC: Add Documentation about PV interface

Date: Sunday, July 4, 2010 - 2:04 am

On 04.07.2010, at 00:41, Benjamin Herrenschmidt wrote:

quoted text> On Fri, 2010-07-02 at 18:27 +0200, Segher Boessenkool wrote:
>>> +To find out if we're running on KVM or not, we overlay the PVR  
>>> register. Usually
>>> +the PVR register contains an id that identifies your CPU type. If,  
>>> however, you
>>> +pass KVM_PVR_PARA in the register that you want the PVR result in,  
>>> the register
>>> +still contains KVM_PVR_PARA after the mfpvr call.
>>> +
>>> +	LOAD_REG_IMM(r5, KVM_PVR_PARA)
>>> +	mfpvr	r5
>>> +	[r5 still contains KVM_PVR_PARA]
>> 
>> I love this part :-)
> 
> Me not :-)
> 
> It should be in the device-tree instead, or something like that. Enough
> games with PVR...

My biggest concern about putting things in the device-tree is that I was trying to keep things as separate as possible. Why does the firmware have to know that it's running in KVM? Why do I have to patch 3 projects (Linux, OpenBIOS, Qemu) when I could go with patching a single one (Linux)?

Alex

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Messages in current thread:

[PATCH 00/27] KVM PPC PV framework, Alexander Graf, (Thu Jul 1, 3:42 am)

[PATCH 01/27] KVM: PPC: Introduce shared page, Alexander Graf, (Thu Jul 1, 3:42 am)

[PATCH 02/27] KVM: PPC: Convert MSR to shared page, Alexander Graf, (Thu Jul 1, 3:42 am)

[PATCH 03/27] KVM: PPC: Convert DSISR to shared page, Alexander Graf, (Thu Jul 1, 3:42 am)

[PATCH 04/27] KVM: PPC: Convert DAR to shared page., Alexander Graf, (Thu Jul 1, 3:42 am)

[PATCH 05/27] KVM: PPC: Convert SRR0 and SRR1 to shared page, Alexander Graf, (Thu Jul 1, 3:42 am)

[PATCH 07/27] KVM: PPC: Implement hypervisor interface, Alexander Graf, (Thu Jul 1, 3:42 am)

[PATCH 08/27] KVM: PPC: Add PV guest critical sections, Alexander Graf, (Thu Jul 1, 3:42 am)

[PATCH 09/27] KVM: PPC: Add PV guest scratch registers, Alexander Graf, (Thu Jul 1, 3:42 am)

[PATCH 10/27] KVM: PPC: Tell guest about pending interrupts, Alexander Graf, (Thu Jul 1, 3:42 am)

[PATCH 11/27] KVM: PPC: Make RMO a define, Alexander Graf, (Thu Jul 1, 3:42 am)

[PATCH 13/27] KVM: PPC: Magic Page Book3s support, Alexander Graf, (Thu Jul 1, 3:42 am)

[PATCH 14/27] KVM: PPC: Magic Page BookE support, Alexander Graf, (Thu Jul 1, 3:42 am)

[PATCH 15/27] KVM: PPC: Expose magic page support to guest, Alexander Graf, (Thu Jul 1, 3:42 am)

[PATCH 16/27] KVM: Move kvm_guest_init out of generic code, Alexander Graf, (Thu Jul 1, 3:42 am)

[PATCH 17/27] KVM: PPC: Generic KVM PV guest support, Alexander Graf, (Thu Jul 1, 3:42 am)

[PATCH 18/27] KVM: PPC: KVM PV guest stubs, Alexander Graf, (Thu Jul 1, 3:42 am)

[PATCH 19/27] KVM: PPC: PV instructions to loads and stores, Alexander Graf, (Thu Jul 1, 3:42 am)

[PATCH 20/27] KVM: PPC: PV tlbsync to nop, Alexander Graf, (Thu Jul 1, 3:42 am)

[PATCH 21/27] KVM: PPC: Introduce kvm_tmp framework, Alexander Graf, (Thu Jul 1, 3:42 am)

[PATCH 22/27] KVM: PPC: Introduce branch patching helper, Alexander Graf, (Thu Jul 1, 3:42 am)

[PATCH 23/27] KVM: PPC: PV assembler helpers, Alexander Graf, (Thu Jul 1, 3:42 am)

[PATCH 24/27] KVM: PPC: PV mtmsrd L=1, Alexander Graf, (Thu Jul 1, 3:42 am)

[PATCH 25/27] KVM: PPC: PV mtmsrd L=0 and mtmsr, Alexander Graf, (Thu Jul 1, 3:43 am)

[PATCH 26/27] KVM: PPC: PV wrteei, Alexander Graf, (Thu Jul 1, 3:43 am)

[PATCH 27/27] KVM: PPC: Add Documentation about PV interface, Alexander Graf, (Thu Jul 1, 3:43 am)

Re: [PATCH 14/27] KVM: PPC: Magic Page BookE support, Josh Boyer, (Thu Jul 1, 4:18 am)

Re: [PATCH 14/27] KVM: PPC: Magic Page BookE support, Alexander Graf, (Thu Jul 1, 5:25 am)

Re: [PATCH 16/27] KVM: Move kvm_guest_init out of generic code, Geert Uytterhoeven, (Fri Jul 2, 12:41 am)

Re: [PATCH 16/27] KVM: Move kvm_guest_init out of generic code, Alexander Graf, (Fri Jul 2, 12:44 am)

Re: [PATCH 13/27] KVM: PPC: Magic Page Book3s support, Alexander Graf, (Fri Jul 2, 8:37 am)

Re: [PATCH 00/27] KVM PPC PV framework, Segher Boessenkool, (Fri Jul 2, 9:22 am)

Re: [PATCH 11/27] KVM: PPC: Make RMO a define, Segher Boessenkool, (Fri Jul 2, 9:23 am)

Re: [PATCH 27/27] KVM: PPC: Add Documentation about PV int ..., Segher Boessenkool, (Fri Jul 2, 9:27 am)

Re: [PATCH 00/27] KVM PPC PV framework, Alexander Graf, (Fri Jul 2, 9:59 am)

Re: [PATCH 27/27] KVM: PPC: Add Documentation about PV int ..., Hollis Blanchard, (Fri Jul 2, 10:59 am)

Re: [PATCH 27/27] KVM: PPC: Add Documentation about PV int ..., Alexander Graf, (Fri Jul 2, 11:41 am)

Re: [PATCH 27/27] KVM: PPC: Add Documentation about PV int ..., Alexander Graf, (Fri Jul 2, 11:47 am)

Re: [PATCH 27/27] KVM: PPC: Add Documentation about PV int ..., Scott Wood, (Fri Jul 2, 12:10 pm)

Re: [PATCH 27/27] KVM: PPC: Add Documentation about PV int ..., Benjamin Herrenschmidt, (Sat Jul 3, 3:41 pm)

Re: [PATCH 27/27] KVM: PPC: Add Documentation about PV int ..., Benjamin Herrenschmidt, (Sat Jul 3, 3:42 pm)

Re: [PATCH 27/27] KVM: PPC: Add Documentation about PV int ..., Alexander Graf, (Sun Jul 4, 2:02 am)

Re: [PATCH 27/27] KVM: PPC: Add Documentation about PV int ..., Alexander Graf, (Sun Jul 4, 2:04 am)

Re: [PATCH 27/27] KVM: PPC: Add Documentation about PV int ..., Avi Kivity, (Sun Jul 4, 2:10 am)

Re: [PATCH 27/27] KVM: PPC: Add Documentation about PV int ..., Alexander Graf, (Sun Jul 4, 2:17 am)

Re: [PATCH 27/27] KVM: PPC: Add Documentation about PV int ..., Alexander Graf, (Sun Jul 4, 2:30 am)

Re: [PATCH 27/27] KVM: PPC: Add Documentation about PV int ..., Avi Kivity, (Sun Jul 4, 2:37 am)

Re: [PATCH 27/27] KVM: PPC: Add Documentation about PV int ..., Avi Kivity, (Sun Jul 4, 2:41 am)

Re: [PATCH 13/27] KVM: PPC: Magic Page Book3s support, Avi Kivity, (Sun Jul 4, 2:42 am)

Re: [PATCH 00/27] KVM PPC PV framework, MJ embd, (Thu Jul 8, 9:57 pm)

Re: [PATCH 00/27] KVM PPC PV framework, Alexander Graf, (Thu Jul 8, 11:33 pm)

Re: [PATCH 27/27] KVM: PPC: Add Documentation about PV int ..., MJ embd, (Fri Jul 9, 2:11 am)

Re: [PATCH 27/27] KVM: PPC: Add Documentation about PV int ..., Alexander Graf, (Fri Jul 9, 2:15 am)

RE: [PATCH 14/27] KVM: PPC: Magic Page BookE support, Liu Yu-B13201, (Mon Jul 12, 4:24 am)

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