From: Paolo Bonzini <pbonzini@redhat.com>
To: Alexander Graf <agraf@suse.de>, kvm-ppc@vger.kernel.org
Cc: kvm@vger.kernel.org, mtosatti@redhat.com,
Paul Mackerras <paulus@samba.org>
Subject: Re: [PULL 33/41] KVM: PPC: Book3S: Move KVM_REG_PPC_WORT to an unused register number
Date: Fri, 30 May 2014 18:03:10 +0200 [thread overview]
Message-ID: <5388ABBE.3000704@redhat.com> (raw)
In-Reply-To: <5388AA95.8050003@suse.de>
Il 30/05/2014 17:58, Alexander Graf ha scritto:
>>
>> Would new userspace with old kernel be able to detect that POWER8
>> support isn't quite complete?
>
> It couldn't, no. It would try to run a guest - if it happens to work
> we're lucky ;).
That's why I'm considering a revert.
> Even then the only thing that would remotely be affected
> by that one_reg rename is live migration (which just got a few more
> fixes in this pull request).
Doesn't "info cpus" also do get/set one_reg? What happens if it returns
EINVAL? Also, reset should certainly try to write all registers, what
happens if one is missed.
Beyond the particular case of WORT, I'd just like to point out that
uapi/ changes need even more scrutiny from maintainers than usual. I
don't know exactly what checks Linus makes in my pull requests, but
uapi/ is at the top of the list of things he might look at, right after
the diffstat. :)
Paolo
next prev parent reply other threads:[~2014-05-30 16:03 UTC|newest]
Thread overview: 52+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-05-30 12:42 [PULL 00/41] ppc patch queue 2014-05-30 Alexander Graf
2014-05-30 12:42 ` [PULL 01/41] KVM: PPC: E500: Ignore L1CSR1_ICFI,ICLFR Alexander Graf
2014-05-30 12:42 ` [PULL 02/41] KVM: PPC: E500: Add dcbtls emulation Alexander Graf
2014-05-30 12:42 ` [PULL 03/41] KVM: PPC: BOOK3S: PR: Enable Little Endian PR guest Alexander Graf
2014-05-30 12:42 ` [PULL 04/41] KVM: PPC: BOOK3S: PR: Fix WARN_ON with debug options on Alexander Graf
2014-05-30 12:42 ` [PULL 05/41] KVM: PPC: Book3S: PR: Fix C/R bit setting Alexander Graf
2014-05-30 12:42 ` [PULL 06/41] KVM: PPC: Book3S_32: PR: Access HTAB in big endian Alexander Graf
2014-05-30 12:42 ` [PULL 07/41] KVM: PPC: Book3S_64 " Alexander Graf
2014-05-30 12:42 ` [PULL 08/41] KVM: PPC: Book3S_64 PR: Access shadow slb " Alexander Graf
2014-05-30 12:42 ` [PULL 09/41] KVM: PPC: Book3S PR: Default to big endian guest Alexander Graf
2014-05-30 12:42 ` [PULL 10/41] KVM: PPC: Book3S PR: PAPR: Access HTAB in big endian Alexander Graf
2014-05-30 12:42 ` [PULL 11/41] KVM: PPC: Book3S PR: PAPR: Access RTAS " Alexander Graf
2014-05-30 12:42 ` [PULL 12/41] KVM: PPC: PR: Fill pvinfo hcall instructions " Alexander Graf
2014-05-30 12:42 ` [PULL 13/41] KVM: PPC: Make shared struct aka magic page guest endian Alexander Graf
2014-05-30 12:42 ` [PULL 14/41] KVM: PPC: Book3S PR: Do dcbz32 patching with big endian instructions Alexander Graf
2014-05-30 12:42 ` [PULL 15/41] KVM: PPC: Book3S: Move little endian conflict to HV KVM Alexander Graf
2014-05-30 12:42 ` [PULL 16/41] KVM: PPC: Book3S PR: Ignore PMU SPRs Alexander Graf
2014-05-30 12:42 ` [PULL 17/41] KVM: PPC: Book3S PR: Emulate TIR register Alexander Graf
2014-05-30 12:42 ` [PULL 18/41] KVM: PPC: Book3S PR: Handle Facility interrupt and FSCR Alexander Graf
2014-05-30 12:42 ` [PULL 19/41] KVM: PPC: Book3S PR: Expose TAR facility to guest Alexander Graf
2014-05-30 12:42 ` [PULL 20/41] KVM: PPC: Book3S PR: Expose EBB registers Alexander Graf
2014-05-30 12:42 ` [PULL 21/41] KVM: PPC: Book3S PR: Expose TM registers Alexander Graf
2014-05-30 12:42 ` [PULL 22/41] KVM: PPC: BOOK3S: HV: Prefer CMA region for hash page table allocation Alexander Graf
2014-05-30 12:42 ` [PULL 23/41] KVM: PPC: BOOK3S: HV: Add mixed page-size support for guest Alexander Graf
2014-05-30 12:42 ` [PULL 24/41] KVM: PPC: Disable NX for old magic page using guests Alexander Graf
2014-05-30 12:42 ` [PULL 25/41] PPC: KVM: Make NX bit available with magic page Alexander Graf
2014-05-30 12:42 ` [PULL 26/41] KVM: PPC: BOOK3S: Always use the saved DAR value Alexander Graf
2014-05-30 12:42 ` [PULL 27/41] KVM: PPC: BOOK3S: Remove open coded make_dsisr in alignment handler Alexander Graf
2014-05-30 12:42 ` [PULL 28/41] PPC: ePAPR: Fix hypercall on LE guest Alexander Graf
2014-05-30 12:42 ` [PULL 29/41] KVM: PPC: Graciously fail broken LE hypercalls Alexander Graf
2014-05-30 12:42 ` [PULL 30/41] KVM: PPC: MPIC: Reset IRQ source private members Alexander Graf
2014-05-30 12:42 ` [PULL 31/41] KVM: PPC: Add CAP to indicate hcall fixes Alexander Graf
2014-05-30 12:42 ` [PULL 32/41] KVM: PPC: Book3S: Add ONE_REG register names that were missed Alexander Graf
2014-05-30 12:42 ` [PULL 33/41] KVM: PPC: Book3S: Move KVM_REG_PPC_WORT to an unused register number Alexander Graf
2014-05-30 15:50 ` Paolo Bonzini
2014-05-30 15:53 ` Alexander Graf
2014-05-30 15:55 ` Paolo Bonzini
2014-05-30 15:58 ` Alexander Graf
2014-05-30 16:03 ` Paolo Bonzini [this message]
2014-05-30 16:08 ` Alexander Graf
2014-05-30 16:11 ` Paolo Bonzini
2014-05-30 16:14 ` Alexander Graf
2014-05-30 12:42 ` [PULL 34/41] KVM: PPC: Book3S HV: Fix check for running inside guest in global_invalidates() Alexander Graf
2014-05-30 12:42 ` [PULL 35/41] KVM: PPC: Book3S HV: Put huge-page HPTEs in rmap chain for base address Alexander Graf
2014-05-30 12:42 ` [PULL 36/41] KVM: PPC: Book3S HV: Fix dirty map for hugepages Alexander Graf
2014-05-30 12:42 ` [PULL 37/41] KVM: PPC: Book3S HV: Make sure we don't miss dirty pages Alexander Graf
2014-05-30 12:42 ` [PULL 38/41] KVM: PPC: Book3S HV: Work around POWER8 performance monitor bugs Alexander Graf
2014-05-30 12:42 ` [PULL 39/41] KVM: PPC: Book3S HV: Fix machine check delivery to guest Alexander Graf
2014-05-30 12:42 ` [PULL 40/41] KVM: PPC: Book3S PR: Use SLB entry 0 Alexander Graf
2014-05-30 12:42 ` [PULL 41/41] KVM: PPC: Book3S PR: Rework SLB switching code Alexander Graf
2014-05-30 12:58 ` [PULL 00/41] ppc patch queue 2014-05-30 Paolo Bonzini
2014-05-30 13:10 ` Alexander Graf
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