linux-kernel - [PATCH v9 04/13] KVM: PPC: reserve a capability and KVM device type for realmode VFIO

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Message-Id: <1377679070-3515-5-git-send-email-aik@ozlabs.ru>
Date:	Wed, 28 Aug 2013 18:37:41 +1000
From:	Alexey Kardashevskiy <aik@...abs.ru>
To:	linuxppc-dev@...ts.ozlabs.org
Cc:	Alexey Kardashevskiy <aik@...abs.ru>,
	David Gibson <david@...son.dropbear.id.au>,
	Benjamin Herrenschmidt <benh@...nel.crashing.org>,
	Paul Mackerras <paulus@...ba.org>,
	Gleb Natapov <gleb@...hat.com>,
	Paolo Bonzini <pbonzini@...hat.com>,
	Alexander Graf <agraf@...e.de>, kvm@...r.kernel.org,
	linux-kernel@...r.kernel.org, kvm-ppc@...r.kernel.org,
	linux-mm@...ck.org
Subject: [PATCH v9 04/13] KVM: PPC: reserve a capability and KVM device type for realmode VFIO

This reserves a capability number for upcoming support
of VFIO-IOMMU DMA operations in real mode.

This reserves a number for a new "SPAPR TCE IOMMU" KVM device
which is going to manage lifetime of SPAPR TCE IOMMU object.

This defines an attribute of the "SPAPR TCE IOMMU" KVM device
which is going to be used for initialization.

Signed-off-by: Alexey Kardashevskiy <aik@...abs.ru>

---
Changes:
v9:
* KVM ioctl is replaced with "SPAPR TCE IOMMU" KVM device type with
KVM_DEV_SPAPR_TCE_IOMMU_ATTR_LINKAGE attribute

2013/08/15:
* fixed mistype in comments
* fixed commit message which says what uses ioctls 0xad and 0xae

2013/07/16:
* changed the number

2013/07/11:
* changed order in a file, added comment about a gap in ioctl number
---
 arch/powerpc/include/uapi/asm/kvm.h | 8 ++++++++
 include/uapi/linux/kvm.h            | 2 ++
 2 files changed, 10 insertions(+)

diff --git a/arch/powerpc/include/uapi/asm/kvm.h b/arch/powerpc/include/uapi/asm/kvm.h
index 0fb1a6e..c1ae1e5 100644
--- a/arch/powerpc/include/uapi/asm/kvm.h
+++ b/arch/powerpc/include/uapi/asm/kvm.h
@@ -511,4 +511,12 @@ struct kvm_get_htab_header {
 #define  KVM_XICS_MASKED		(1ULL << 41)
 #define  KVM_XICS_PENDING		(1ULL << 42)
 
+/* SPAPR TCE IOMMU device specification */
+struct kvm_create_spapr_tce_iommu_linkage {
+	__u64 liobn;
+	__u32 fd;
+	__u32 flags;
+};
+#define KVM_DEV_SPAPR_TCE_IOMMU_ATTR_LINKAGE	0
+
 #endif /* __LINUX_KVM_POWERPC_H */
diff --git a/include/uapi/linux/kvm.h b/include/uapi/linux/kvm.h
index 99c2533..9d20630 100644
--- a/include/uapi/linux/kvm.h
+++ b/include/uapi/linux/kvm.h
@@ -668,6 +668,7 @@ struct kvm_ppc_smmu_info {
 #define KVM_CAP_IRQ_XICS 92
 #define KVM_CAP_ARM_EL1_32BIT 93
 #define KVM_CAP_SPAPR_MULTITCE 94
+#define KVM_CAP_SPAPR_TCE_IOMMU 95
 
 #ifdef KVM_CAP_IRQ_ROUTING
 
@@ -843,6 +844,7 @@ struct kvm_device_attr {
 #define KVM_DEV_TYPE_FSL_MPIC_20	1
 #define KVM_DEV_TYPE_FSL_MPIC_42	2
 #define KVM_DEV_TYPE_XICS		3
+#define KVM_DEV_TYPE_SPAPR_TCE_IOMMU	4
 
 /*
  * ioctls for VM fds
-- 
1.8.4.rc4

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