linux-kernel - Re: [PATCH 0/7] powerpc/watchpoint: 2nd DAWR kvm enablement + selftests

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Message-ID: <20200902023259.GC272502@thinks.paulus.ozlabs.org>
Date:   Wed, 2 Sep 2020 12:32:59 +1000
From:   Paul Mackerras <paulus@...abs.org>
To:     Ravi Bangoria <ravi.bangoria@...ux.ibm.com>
Cc:     mpe@...erman.id.au, mikey@...ling.org, npiggin@...il.com,
        pbonzini@...hat.com, christophe.leroy@....fr, jniethe5@...il.com,
        pedromfc@...ibm.com, rogealve@...ibm.com, kvm@...r.kernel.org,
        kvm-ppc@...r.kernel.org, linux-kernel@...r.kernel.org,
        linuxppc-dev@...ts.ozlabs.org, linux-kselftest@...r.kernel.org
Subject: Re: [PATCH 0/7] powerpc/watchpoint: 2nd DAWR kvm enablement +
 selftests

On Thu, Jul 23, 2020 at 03:50:51PM +0530, Ravi Bangoria wrote:
> Patch #1, #2 and #3 enables p10 2nd DAWR feature for Book3S kvm guest. DAWR
> is a hypervisor resource and thus H_SET_MODE hcall is used to set/unset it.
> A new case H_SET_MODE_RESOURCE_SET_DAWR1 is introduced in H_SET_MODE hcall
> for setting/unsetting 2nd DAWR. Also, new capability KVM_CAP_PPC_DAWR1 has
> been added to query 2nd DAWR support via kvm ioctl.
> 
> This feature also needs to be enabled in Qemu to really use it. I'll reply
> link to qemu patches once I post them in qemu-devel mailing list.
> 
> Patch #4, #5, #6 and #7 adds selftests to test 2nd DAWR.

If/when you resubmit these patches, please split the KVM patches into
a separate series, since the KVM patches would go via my tree whereas
I expect the selftests/powerpc patches would go through Michael
Ellerman's tree.

Paul.