Enable the device IOTLB (i.e. ATS) for both the bare metal and KVM
environments.
Signed-off-by: NYu Zhao <yu.zhao@intel.com>
Signed-off-by: NDavid Woodhouse <David.Woodhouse@intel.com>

The patch adds kernel parameter intel_iommu=pt to set up pass through
mode in context mapping entry. This disables DMAR in linux kernel; but
KVM still runs on VT-d and interrupt remapping still works.

In this mode, kernel uses swiotlb for DMA API functions but other VT-d
functionalities are enabled for KVM. KVM always uses multi level
translation page table in VT-d. By default, pass though mode is disabled
in kernel.

This is useful when people don't want to enable VT-d DMAR in kernel but
still want to use KVM and interrupt remapping for reasons like DMAR
performance concern or debug purpose.
Signed-off-by: NFenghua Yu <fenghua.yu@intel.com>
Acked-by: NWeidong Han <weidong@intel.com>
Signed-off-by: NDavid Woodhouse <David.Woodhouse@intel.com>

The user can request to enable snooping control through VT-d page table.
Signed-off-by: NSheng Yang <sheng@linux.intel.com>
Signed-off-by: NDavid Woodhouse <David.Woodhouse@intel.com>

dmar.o can be built in the CONFIG_INTR_REMAP=y case but
iommu_calculate_agaw() is only available if VT-d is built as well.

So create an inline version of iommu_calculate_agaw() for the
!CONFIG_DMAR case. The iommu->agaw value wont be used in this
case, but the code is cleaner (has less #ifdefs) if we have it around
unconditionally.
Signed-off-by: NIngo Molnar <mingo@elte.hu>

"SAGAW" capability may be different across iommus. Use a default agaw, but if default agaw is not supported in some iommus, choose a less supported agaw.
Signed-off-by: NWeidong Han <weidong.han@intel.com>
Signed-off-by: NJoerg Roedel <joerg.roedel@amd.com>

Signed-off-by: NMark McLoughlin <markmc@redhat.com>
Signed-off-by: NDavid Woodhouse <David.Woodhouse@intel.com>

Signed-off-by: NMark McLoughlin <markmc@redhat.com>
Signed-off-by: NDavid Woodhouse <David.Woodhouse@intel.com>

Signed-off-by: NMark McLoughlin <markmc@redhat.com>
Signed-off-by: NDavid Woodhouse <David.Woodhouse@intel.com>

DMA_PTE_READ/WRITE are needed by kvm.
Signed-off-by: NMark McLoughlin <markmc@redhat.com>
Signed-off-by: NDavid Woodhouse <David.Woodhouse@intel.com>

Signed-off-by: NMark McLoughlin <markmc@redhat.com>
Signed-off-by: NDavid Woodhouse <David.Woodhouse@intel.com>

We keep the struct root_entry forward declaration for the
pointer in struct intel_iommu.
Signed-off-by: NMark McLoughlin <markmc@redhat.com>
Signed-off-by: NDavid Woodhouse <David.Woodhouse@intel.com>

Signed-off-by: NMark McLoughlin <markmc@redhat.com>
Signed-off-by: NDavid Woodhouse <David.Woodhouse@intel.com>

init_dmars() is not used outside of drivers/pci/intel-iommu.c
Signed-off-by: NMark McLoughlin <markmc@redhat.com>
Signed-off-by: NDavid Woodhouse <David.Woodhouse@intel.com>

The current Intel IOMMU code assumes that both host page size and Intel
IOMMU page size are 4KiB. The first patch supports variable page size.
This provides support for IA64 which has multiple page sizes.

This patch also adds some other code hooks for IA64 platform including
DMAR_OPERATION_TIMEOUT definition.

[dwmw2: some cleanup]
Signed-off-by: NFenghua Yu <fenghua.yu@intel.com>
Signed-off-by: NTony Luck <tony.luck@intel.com>
Signed-off-by: NDavid Woodhouse <David.Woodhouse@intel.com>

This patch extends the VT-d driver to support KVM

[Ben: fixed memory pinning]
[avi: move dma_remapping.h as well]
Signed-off-by: NKay, Allen M <allen.m.kay@intel.com>
Signed-off-by: NWeidong Han <weidong.han@intel.com>
Signed-off-by: NBen-Ami Yassour <benami@il.ibm.com>
Signed-off-by: NAmit Shah <amit.shah@qumranet.com>
Acked-by: NMark Gross <mgross@linux.intel.com>
Signed-off-by: NAvi Kivity <avi@qumranet.com>

Interrupt remapping (part of Intel Virtualization Tech for directed I/O)
infrastructure.
Signed-off-by: NSuresh Siddha <suresh.b.siddha@intel.com>
Cc: akpm@linux-foundation.org
Cc: arjan@linux.intel.com
Cc: andi@firstfloor.org
Cc: ebiederm@xmission.com
Cc: jbarnes@virtuousgeek.org
Cc: steiner@sgi.com
Signed-off-by: NIngo Molnar <mingo@elte.hu>

code reorganization of the generic Intel vt-d parsing related routines and linux
iommu routines specific to Intel vt-d.

drivers/pci/dmar.c	now contains the generic vt-d parsing related routines
drivers/pci/intel_iommu.c contains the iommu routines specific to vt-d
Signed-off-by: NSuresh Siddha <suresh.b.siddha@intel.com>
Cc: akpm@linux-foundation.org
Cc: arjan@linux.intel.com
Cc: andi@firstfloor.org
Cc: ebiederm@xmission.com
Cc: jbarnes@virtuousgeek.org
Cc: steiner@sgi.com
Signed-off-by: NIngo Molnar <mingo@elte.hu>