[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index] [Xen-devel] [PATCH 0/6] IOMMU, vtd and iotlb flush rework (v7)
In one of my previous email I detailed a bug I was seeing when passing through a Intel GPU on a guest that has more that 4G or RAM. Allen suggested that I go for the Plan B but after a discussion with Tim we agreed that Plan B was way to disruptive in term of code change. This patch series implements Plan A. http://xen.1045712.n5.nabble.com/VTD-Intel-iommu-IOTLB-flush-really-slow-td4952866.html Changes between v6 and v7: - xenmem_add_to_physmap_once can't take a pointer on xatp because it modifies .idx and .gpfn. - Cancel hypercall continuation in the compat layer if the copy_to_guest failed. Changes between v5 and v6: - Rework the patch queue to make it more readable. - Modify xatp in place in xenmem_add_to_physmap - Only check for preemption if we are not at the last iteration - Copy xatp guest handler back to the guest only in case of continuation - Add continuation only when dealing with the new xenmem space (XENMAPSPACE_gmfn_range). Changes between v4 and v5: - Fix hypercall continuation for add_to_physmap in compat mode. Changes between v3 and v4: - Move the loop for gmfn_range from arch_memory_op to xenmem_add_to_physmap. - Add a comment to comment to explain the purpose of iommu_dont_flush_iotlb. Changes between v2 and v3: - Check for the presence iotlb_flush_all callback before calling it. Changes between v1 and v2: - Move size in struct xen_add_to_physmap in padding between .domid and .space. - Store iommu_dont_flush per cpu - Change the code in hvmloader to relocate by batch of 64K, .size is now 16 bits. Jean Guyader (6): vtd: Refactor iotlb flush code iommu: Introduce iommu_flush and iommu_flush_all. add_to_physmap: Move the code for XENMEM_add_to_physmap mm: New XENMEM space, XENMAPSPACE_gmfn_range hvmloader: Change memory relocation loop when overlap with PCI hole Introduce per cpu flag (iommu_dont_flush_iotlb) to avoid unnecessary iotlb flush tools/firmware/hvmloader/pci.c | 20 ++- xen/arch/x86/mm.c | 231 ++++++++++++++++++++++------------- xen/arch/x86/x86_64/compat/mm.c | 14 ++ xen/drivers/passthrough/iommu.c | 25 ++++ xen/drivers/passthrough/vtd/iommu.c | 100 +++++++++------- xen/include/public/memory.h | 4 + xen/include/xen/iommu.h | 17 +++ 7 files changed, 279 insertions(+), 132 deletions(-) _______________________________________________ Xen-devel mailing list Xen-devel@xxxxxxxxxxxxxxxxxxx http://lists.xensource.com/xen-devel
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