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

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Message-ID: <a50f2a17-ccd0-6772-6c55-82a37561bf76@linux.ibm.com>
Date:   Thu, 23 Jul 2020 16:18:37 +0530
From:   Ravi Bangoria <ravi.bangoria@...ux.ibm.com>
To:     mpe@...erman.id.au, paulus@...ba.org
Cc:     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,
        Ravi Bangoria <ravi.bangoria@...ux.ibm.com>
Subject: Re: [PATCH 0/7] powerpc/watchpoint: 2nd DAWR kvm enablement +
 selftests



On 7/23/20 3:50 PM, 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.

Qemu patches: https://lore.kernel.org/kvm/20200723104220.314671-1-ravi.bangoria@linux.ibm.com