From: David Gibson <david@gibson.dropbear.id.au>
To: Alexey Kardashevskiy <aik@ozlabs.ru>
Cc: linuxppc-dev@lists.ozlabs.org, kvm@vger.kernel.org,
Alexander Graf <agraf@suse.de>,
kvm-ppc@vger.kernel.org,
Alex Williamson <alex.williamson@redhat.com>,
Paul Mackerras <paulus@samba.org>,
Joerg Roedel <joerg.roedel@amd.com>
Subject: Re: [PATCH 2/6] KVM: PPC: Add support for multiple-TCE hcalls
Date: Tue, 7 May 2013 15:05:14 +1000 [thread overview]
Message-ID: <20130507050514.GN13692@truffula.fritz.box> (raw)
In-Reply-To: <1367825157-27231-3-git-send-email-aik@ozlabs.ru>
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On Mon, May 06, 2013 at 05:25:53PM +1000, Alexey Kardashevskiy wrote:
> This adds real mode handlers for the H_PUT_TCE_INDIRECT and
> H_STUFF_TCE hypercalls for QEMU emulated devices such as virtio
> devices or emulated PCI. These calls allow adding multiple entries
> (up to 512) into the TCE table in one call which saves time on
> transition to/from real mode.
>
> This adds a guest physical to host real address converter
> and calls the existing H_PUT_TCE handler. The converting function
> is going to be fully utilized by upcoming VFIO supporting patches.
>
> This also implements the KVM_CAP_PPC_MULTITCE capability,
> so in order to support the functionality of this patch, QEMU
> needs to query for this capability and set the "hcall-multi-tce"
> hypertas property only if the capability is present, otherwise
> there will be serious performance degradation.
>
> Cc: David Gibson <david@gibson.dropbear.id.au>
> Signed-off-by: Alexey Kardashevskiy <aik@ozlabs.ru>
> Signed-off-by: Paul Mackerras <paulus@samba.org>
Fwiw, it would be nice to get this patch merged, regardless of the
rest of the VFIO/powerpc patches.
--
David Gibson | I'll have my music baroque, and my code
david AT gibson.dropbear.id.au | minimalist, thank you. NOT _the_ _other_
| _way_ _around_!
http://www.ozlabs.org/~dgibson
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WARNING: multiple messages have this Message-ID (diff)
From: David Gibson <david@gibson.dropbear.id.au>
To: Alexey Kardashevskiy <aik@ozlabs.ru>
Cc: kvm@vger.kernel.org, Joerg Roedel <joerg.roedel@amd.com>,
Alexander Graf <agraf@suse.de>,
kvm-ppc@vger.kernel.org,
Alex Williamson <alex.williamson@redhat.com>,
Paul Mackerras <paulus@samba.org>,
linuxppc-dev@lists.ozlabs.org
Subject: Re: [PATCH 2/6] KVM: PPC: Add support for multiple-TCE hcalls
Date: Tue, 7 May 2013 15:05:14 +1000 [thread overview]
Message-ID: <20130507050514.GN13692@truffula.fritz.box> (raw)
In-Reply-To: <1367825157-27231-3-git-send-email-aik@ozlabs.ru>
[-- Attachment #1: Type: text/plain, Size: 1350 bytes --]
On Mon, May 06, 2013 at 05:25:53PM +1000, Alexey Kardashevskiy wrote:
> This adds real mode handlers for the H_PUT_TCE_INDIRECT and
> H_STUFF_TCE hypercalls for QEMU emulated devices such as virtio
> devices or emulated PCI. These calls allow adding multiple entries
> (up to 512) into the TCE table in one call which saves time on
> transition to/from real mode.
>
> This adds a guest physical to host real address converter
> and calls the existing H_PUT_TCE handler. The converting function
> is going to be fully utilized by upcoming VFIO supporting patches.
>
> This also implements the KVM_CAP_PPC_MULTITCE capability,
> so in order to support the functionality of this patch, QEMU
> needs to query for this capability and set the "hcall-multi-tce"
> hypertas property only if the capability is present, otherwise
> there will be serious performance degradation.
>
> Cc: David Gibson <david@gibson.dropbear.id.au>
> Signed-off-by: Alexey Kardashevskiy <aik@ozlabs.ru>
> Signed-off-by: Paul Mackerras <paulus@samba.org>
Fwiw, it would be nice to get this patch merged, regardless of the
rest of the VFIO/powerpc patches.
--
David Gibson | I'll have my music baroque, and my code
david AT gibson.dropbear.id.au | minimalist, thank you. NOT _the_ _other_
| _way_ _around_!
http://www.ozlabs.org/~dgibson
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WARNING: multiple messages have this Message-ID (diff)
From: David Gibson <david@gibson.dropbear.id.au>
To: Alexey Kardashevskiy <aik@ozlabs.ru>
Cc: linuxppc-dev@lists.ozlabs.org, kvm@vger.kernel.org,
Alexander Graf <agraf@suse.de>,
kvm-ppc@vger.kernel.org,
Alex Williamson <alex.williamson@redhat.com>,
Paul Mackerras <paulus@samba.org>,
Joerg Roedel <joerg.roedel@amd.com>
Subject: Re: [PATCH 2/6] KVM: PPC: Add support for multiple-TCE hcalls
Date: Tue, 07 May 2013 05:05:14 +0000 [thread overview]
Message-ID: <20130507050514.GN13692@truffula.fritz.box> (raw)
In-Reply-To: <1367825157-27231-3-git-send-email-aik@ozlabs.ru>
[-- Attachment #1: Type: text/plain, Size: 1350 bytes --]
On Mon, May 06, 2013 at 05:25:53PM +1000, Alexey Kardashevskiy wrote:
> This adds real mode handlers for the H_PUT_TCE_INDIRECT and
> H_STUFF_TCE hypercalls for QEMU emulated devices such as virtio
> devices or emulated PCI. These calls allow adding multiple entries
> (up to 512) into the TCE table in one call which saves time on
> transition to/from real mode.
>
> This adds a guest physical to host real address converter
> and calls the existing H_PUT_TCE handler. The converting function
> is going to be fully utilized by upcoming VFIO supporting patches.
>
> This also implements the KVM_CAP_PPC_MULTITCE capability,
> so in order to support the functionality of this patch, QEMU
> needs to query for this capability and set the "hcall-multi-tce"
> hypertas property only if the capability is present, otherwise
> there will be serious performance degradation.
>
> Cc: David Gibson <david@gibson.dropbear.id.au>
> Signed-off-by: Alexey Kardashevskiy <aik@ozlabs.ru>
> Signed-off-by: Paul Mackerras <paulus@samba.org>
Fwiw, it would be nice to get this patch merged, regardless of the
rest of the VFIO/powerpc patches.
--
David Gibson | I'll have my music baroque, and my code
david AT gibson.dropbear.id.au | minimalist, thank you. NOT _the_ _other_
| _way_ _around_!
http://www.ozlabs.org/~dgibson
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next prev parent reply other threads:[~2013-05-07 5:05 UTC|newest]
Thread overview: 44+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-05-06 7:25 [PATCH 0/6] KVM: PPC: IOMMU in-kernel handling Alexey Kardashevskiy
2013-05-06 7:25 ` Alexey Kardashevskiy
2013-05-06 7:25 ` Alexey Kardashevskiy
2013-05-06 7:25 ` [PATCH 1/6] KVM: PPC: Make lookup_linux_pte public Alexey Kardashevskiy
2013-05-06 7:25 ` Alexey Kardashevskiy
2013-05-06 7:25 ` Alexey Kardashevskiy
2013-05-06 7:25 ` [PATCH 2/6] KVM: PPC: Add support for multiple-TCE hcalls Alexey Kardashevskiy
2013-05-06 7:25 ` Alexey Kardashevskiy
2013-05-06 7:25 ` Alexey Kardashevskiy
2013-05-07 5:05 ` David Gibson [this message]
2013-05-07 5:05 ` David Gibson
2013-05-07 5:05 ` David Gibson
2013-05-10 6:51 ` David Gibson
2013-05-10 6:51 ` David Gibson
2013-05-10 6:51 ` David Gibson
2013-05-10 7:53 ` Alexey Kardashevskiy
2013-05-10 7:53 ` Alexey Kardashevskiy
2013-05-10 7:53 ` Alexey Kardashevskiy
2013-05-06 7:25 ` [PATCH 3/6] powerpc: Prepare to support kernel handling of IOMMU map/unmap Alexey Kardashevskiy
2013-05-06 7:25 ` Alexey Kardashevskiy
2013-05-06 7:25 ` Alexey Kardashevskiy
2013-05-06 7:25 ` [PATCH 4/6] iommu: Add a function to find an iommu group by id Alexey Kardashevskiy
2013-05-06 7:25 ` Alexey Kardashevskiy
2013-05-06 7:25 ` Alexey Kardashevskiy
2013-05-06 7:25 ` [PATCH 5/6] KVM: PPC: Add support for IOMMU in-kernel handling Alexey Kardashevskiy
2013-05-06 7:25 ` Alexey Kardashevskiy
2013-05-06 7:25 ` Alexey Kardashevskiy
2013-05-07 5:29 ` David Gibson
2013-05-07 5:29 ` David Gibson
2013-05-07 5:29 ` David Gibson
2013-05-07 5:51 ` Alexey Kardashevskiy
2013-05-07 5:51 ` Alexey Kardashevskiy
2013-05-07 5:51 ` Alexey Kardashevskiy
2013-05-07 6:02 ` David Gibson
2013-05-07 6:02 ` David Gibson
2013-05-07 6:02 ` David Gibson
2013-05-07 6:27 ` Alexey Kardashevskiy
2013-05-07 6:27 ` Alexey Kardashevskiy
2013-05-07 6:27 ` Alexey Kardashevskiy
2013-05-07 6:54 ` David Gibson
2013-05-07 6:54 ` David Gibson
2013-05-06 7:25 ` [PATCH 6/6] KVM: PPC: Add hugepage " Alexey Kardashevskiy
2013-05-06 7:25 ` Alexey Kardashevskiy
2013-05-06 7:25 ` Alexey Kardashevskiy
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