Reviewed-by: Star Zeng <[email protected]> to MdeModulePkg changes.
-----Original Message----- From: Laszlo Ersek [mailto:[email protected]] Sent: Friday, September 8, 2017 6:41 AM To: edk2-devel-01 <[email protected]> Cc: Ard Biesheuvel <[email protected]>; Brijesh Singh <[email protected]>; Dong, Eric <[email protected]>; Yao, Jiewen <[email protected]>; Justen, Jordan L <[email protected]>; Zeng, Star <[email protected]> Subject: [PATCH 00/10] MdeModulePkg, OvmfPkg: unmap DMA buffers at ExitBootServices Repo: https://github.com/lersek/edk2.git Branch: iommu_exit_boot This series is the result of the discussion under [edk2] [PATCH 0/4] MdeModulePkg: some PCI HC drivers: unmap common buffers at ExitBootServices() https://lists.01.org/pipermail/edk2-devel/2017-September/014099.html At ExitBootServices(), PCI and VirtIo drivers should only care about aborting pending DMA on the devices. Cleaning up PciIo mappings (which ultimately boil down to IOMMU mappings) for those aborted DMA operations should be the job of the IOMMU driver. Patches 01 through 03 clean up the AtaAtapiPassThru driver in MdeModulePkg a little bit, because at present, (a) it unmaps the buffers and disables BMDMA in the wrong order in its DriverBindingStop() function, (b) it doesn't abort pending DMA at ExitBootServices(). This subset can be treated separately from the rest of the series, but I thought they belonged loosely together (given that AtaAtapiPassThru is used on QEMU's Q35 machine type). Patches 04 through 07 remove VIRTIO_DEVICE_PROTOCOL.UnmapSharedBuffer() calls from the VirtIo drivers' ExitBootServices() handlers. (The conversion of VirtioNetDxe to device addresses is still in progress -- Brijesh, when you submit v2 of that, under this approach, there is no need to change VirtioNetExitBoot() relative to current upstream, and you can use VirtioOperationBusMasterRead to map outgoing packets.) Patches 08 through 10 make OvmfPkg/IoMmuDxe track all mappings, and unmap all mappings (Read, Write, CommonBuffer) that are in effect when ExitBootServices() is called. It is ensured that PCI and VirtIo drivers abort pending DMA first, and IoMmuDxe clean up the mappings last. Cc: Ard Biesheuvel <[email protected]> Cc: Brijesh Singh <[email protected]> Cc: Eric Dong <[email protected]> Cc: Jiewen Yao <[email protected]> Cc: Jordan Justen <[email protected]> Cc: Star Zeng <[email protected]> Thanks Laszlo Laszlo Ersek (10): MdeModulePkg/AtaAtapiPassThru: cache EnabledPciAttributes MdeModulePkg/AtaAtapiPassThru: unmap DMA buffers after disabling BM DMA MdeModulePkg/AtaAtapiPassThru: disable the device at ExitBootServices() OvmfPkg/VirtioBlkDxe: don't unmap VRING at ExitBootServices() OvmfPkg/VirtioGpuDxe: don't unmap VRING & BackingStore at ExitBootServices OvmfPkg/VirtioRngDxe: don't unmap VRING at ExitBootServices() OvmfPkg/VirtioScsiDxe: don't unmap VRING at ExitBootServices() OvmfPkg/IoMmuDxe: track all mappings OvmfPkg/IoMmuDxe: generalize IoMmuUnmap() to IoMmuUnmapWorker() OvmfPkg/IoMmuDxe: unmap all IOMMU mappings at ExitBootServices() MdeModulePkg/Bus/Ata/AtaAtapiPassThru/AtaAtapiPassThru.c | 103 +++++--- MdeModulePkg/Bus/Ata/AtaAtapiPassThru/AtaAtapiPassThru.h | 7 + OvmfPkg/IoMmuDxe/AmdSevIoMmu.c | 246 +++++++++++++++++--- OvmfPkg/VirtioBlkDxe/VirtioBlk.c | 7 +- OvmfPkg/VirtioGpuDxe/Commands.c | 23 +- OvmfPkg/VirtioRngDxe/VirtioRng.c | 7 +- OvmfPkg/VirtioScsiDxe/VirtioScsi.c | 7 +- 7 files changed, 299 insertions(+), 101 deletions(-) -- 2.14.1.3.gb7cf6e02401b _______________________________________________ edk2-devel mailing list [email protected] https://lists.01.org/mailman/listinfo/edk2-devel
