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 18:11:21 +0200 [thread overview]
Message-ID: <5388ADA9.3080006@redhat.com> (raw)
In-Reply-To: <5388AD02.8010304@suse.de>
Il 30/05/2014 18:08, Alexander Graf ha scritto:
>> What happens if it returns EINVAL? Also, reset should certainly
>> try to write all registers, what happens if one is missed.
>
> If it returns EINVAL we just ignore the register.
I wonder if it's the right thing to do. You remember how you were
bitten by less-than-sensible error handling in the x86
kvm_arch_put_registers.
>> 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. :)
>
> Consider that ONE_REG as experimental flagged :). Really, I am as
> concerned as you are on ABI breakages, but in this case it's not worth
> it. I'm not even sure any guest uses WORT at all. Linux doesn't seem to.
Fair enough... for this time only!...
Paolo
next prev parent reply other threads:[~2014-05-30 16:11 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
2014-05-30 16:08 ` Alexander Graf
2014-05-30 16:11 ` Paolo Bonzini [this message]
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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