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From: Alexey Kardashevskiy <aik@ozlabs.ru>
To: linuxppc-dev@lists.ozlabs.org
Cc: Alexey Kardashevskiy <aik@ozlabs.ru>,
	Alex Williamson <alex.williamson@redhat.com>,
	David Gibson <david@gibson.dropbear.id.au>,
	Paul Mackerras <paulus@samba.org>,
	kvm-ppc@vger.kernel.org, kvm@vger.kernel.org
Subject: [PATCH kernel v10 06/10] KVM: PPC: Enable IOMMU_API for KVM_BOOK3S_64 permanently
Date: Fri, 17 Mar 2017 16:09:55 +1100	[thread overview]
Message-ID: <20170317050959.37312-7-aik@ozlabs.ru> (raw)
In-Reply-To: <20170317050959.37312-1-aik@ozlabs.ru>

It does not make much sense to have KVM in book3s-64 and
not to have IOMMU bits for PCI pass through support as it costs little
and allows VFIO to function on book3s KVM.

Having IOMMU_API always enabled makes it unnecessary to have a lot of
"#ifdef IOMMU_API" in arch/powerpc/kvm/book3s_64_vio*. With those
ifdef's we could have only user space emulated devices accelerated
(but not VFIO) which do not seem to be very useful.

Signed-off-by: Alexey Kardashevskiy <aik@ozlabs.ru>
Reviewed-by: David Gibson <david@gibson.dropbear.id.au>
---
 arch/powerpc/kvm/Kconfig | 1 +
 1 file changed, 1 insertion(+)

diff --git a/arch/powerpc/kvm/Kconfig b/arch/powerpc/kvm/Kconfig
index 029be26b5a17..65a471de96de 100644
--- a/arch/powerpc/kvm/Kconfig
+++ b/arch/powerpc/kvm/Kconfig
@@ -67,6 +67,7 @@ config KVM_BOOK3S_64
 	select KVM_BOOK3S_64_HANDLER
 	select KVM
 	select KVM_BOOK3S_PR_POSSIBLE if !KVM_BOOK3S_HV_POSSIBLE
+	select SPAPR_TCE_IOMMU if IOMMU_SUPPORT
 	---help---
 	  Support running unmodified book3s_64 and book3s_32 guest kernels
 	  in virtual machines on book3s_64 host processors.
-- 
2.11.0

WARNING: multiple messages have this Message-ID (diff)
From: Alexey Kardashevskiy <aik@ozlabs.ru>
To: linuxppc-dev@lists.ozlabs.org
Cc: Alexey Kardashevskiy <aik@ozlabs.ru>,
	Alex Williamson <alex.williamson@redhat.com>,
	David Gibson <david@gibson.dropbear.id.au>,
	Paul Mackerras <paulus@samba.org>,
	kvm-ppc@vger.kernel.org, kvm@vger.kernel.org
Subject: [PATCH kernel v10 06/10] KVM: PPC: Enable IOMMU_API for KVM_BOOK3S_64 permanently
Date: Fri, 17 Mar 2017 05:09:55 +0000	[thread overview]
Message-ID: <20170317050959.37312-7-aik@ozlabs.ru> (raw)
In-Reply-To: <20170317050959.37312-1-aik@ozlabs.ru>

It does not make much sense to have KVM in book3s-64 and
not to have IOMMU bits for PCI pass through support as it costs little
and allows VFIO to function on book3s KVM.

Having IOMMU_API always enabled makes it unnecessary to have a lot of
"#ifdef IOMMU_API" in arch/powerpc/kvm/book3s_64_vio*. With those
ifdef's we could have only user space emulated devices accelerated
(but not VFIO) which do not seem to be very useful.

Signed-off-by: Alexey Kardashevskiy <aik@ozlabs.ru>
Reviewed-by: David Gibson <david@gibson.dropbear.id.au>
---
 arch/powerpc/kvm/Kconfig | 1 +
 1 file changed, 1 insertion(+)

diff --git a/arch/powerpc/kvm/Kconfig b/arch/powerpc/kvm/Kconfig
index 029be26b5a17..65a471de96de 100644
--- a/arch/powerpc/kvm/Kconfig
+++ b/arch/powerpc/kvm/Kconfig
@@ -67,6 +67,7 @@ config KVM_BOOK3S_64
 	select KVM_BOOK3S_64_HANDLER
 	select KVM
 	select KVM_BOOK3S_PR_POSSIBLE if !KVM_BOOK3S_HV_POSSIBLE
+	select SPAPR_TCE_IOMMU if IOMMU_SUPPORT
 	---help---
 	  Support running unmodified book3s_64 and book3s_32 guest kernels
 	  in virtual machines on book3s_64 host processors.
-- 
2.11.0


  parent reply	other threads:[~2017-03-17  5:10 UTC|newest]

Thread overview: 27+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2017-03-17  5:09 [PATCH kernel v10 00/10] powerpc/kvm/vfio: Enable in-kernel acceleration Alexey Kardashevskiy
2017-03-17  5:09 ` Alexey Kardashevskiy
2017-03-17  5:09 ` [PATCH kernel v10 01/10] powerpc/mmu: Add real mode support for IOMMU preregistered memory Alexey Kardashevskiy
2017-03-17  5:09   ` Alexey Kardashevskiy
2017-03-17  5:09 ` [PATCH kernel v10 02/10] powerpc/powernv/iommu: Add real mode version of iommu_table_ops::exchange() Alexey Kardashevskiy
2017-03-17  5:09   ` Alexey Kardashevskiy
2017-03-17  5:09 ` [PATCH kernel v10 03/10] powerpc/iommu/vfio_spapr_tce: Cleanup iommu_table disposal Alexey Kardashevskiy
2017-03-17  5:09   ` Alexey Kardashevskiy
2017-03-17  5:09 ` [PATCH kernel v10 04/10] powerpc/vfio_spapr_tce: Add reference counting to iommu_table Alexey Kardashevskiy
2017-03-17  5:09   ` Alexey Kardashevskiy
2017-03-22  0:40   ` David Gibson
2017-03-22  0:40     ` David Gibson
2017-03-17  5:09 ` [PATCH kernel v10 05/10] KVM: PPC: Reserve KVM_CAP_SPAPR_TCE_VFIO capability number Alexey Kardashevskiy
2017-03-17  5:09   ` Alexey Kardashevskiy
2017-03-17  5:09 ` Alexey Kardashevskiy [this message]
2017-03-17  5:09   ` [PATCH kernel v10 06/10] KVM: PPC: Enable IOMMU_API for KVM_BOOK3S_64 permanently Alexey Kardashevskiy
2017-03-17  5:09 ` [PATCH kernel v10 07/10] KVM: PPC: Pass kvm* to kvmppc_find_table() Alexey Kardashevskiy
2017-03-17  5:09   ` Alexey Kardashevskiy
2017-03-17  5:09 ` [PATCH kernel v10 08/10] KVM: PPC: Use preregistered memory API to access TCE list Alexey Kardashevskiy
2017-03-17  5:09   ` Alexey Kardashevskiy
2017-03-17  5:09 ` [PATCH kernel v10 09/10] KVM: PPC: iommu: Unify TCE checking Alexey Kardashevskiy
2017-03-17  5:09   ` Alexey Kardashevskiy
2017-03-17  5:09 ` [PATCH kernel v10 10/10] KVM: PPC: VFIO: Add in-kernel acceleration for VFIO Alexey Kardashevskiy
2017-03-17  5:09   ` Alexey Kardashevskiy
2017-03-21 19:11   ` Alex Williamson
2017-03-21 19:11     ` Alex Williamson
2017-03-21 19:11     ` Alex Williamson

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