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[Xen-devel] Re: [PATCH 0/6] IOMMU, vtd and iotlb flush rework (v8)
On 16/11/2011 19:25, "Jean Guyader" <jean.guyader@xxxxxxxxxxxxx> wrote:
> 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.
I'll check these in when they get an Ack from Jan.
> Changes between v7 and v8:
> - Rebase on new add_to_physmap from Andres Lagar-Cavilla
> - Only do copy_to_guest on the new XENMAPSPACE
> - Convert the xatp argument to a pointer in xenmem_add_to_physmap.
> - Modify xenmem_add_to_physmap so it doesn't touchs the input (xatp is
> const now).
> 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
> 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
> 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
> - Add a comment to comment to explain the purpose of
> 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
> - 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 | 212
> xen/arch/x86/x86_64/compat/mm.c | 18 +++
> 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, 277 insertions(+), 119 deletions(-)
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