Patch 1~3 reviewed-by: [email protected]
> -----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
