This is an attempt to allow PCI pass through to a secure guest when hardware can only access insecure memory. This allows SWIOTLB use for passed through devices.
Later on secure VMs will unsecure SWIOTLB bounce buffers for DMA and the rest of the guest RAM will be unavailable to the hardware by default. This is based on sha1 e93c9c99a629 Linus Torvalds "Linux 5.1". Please comment. Thanks. Alexey Kardashevskiy (2): powerpc/pseries/dma: Allow swiotlb powerpc/pseries/dma: Enable swiotlb arch/powerpc/kernel/dma-iommu.c | 36 ++++++++++++++++++++++++++ arch/powerpc/platforms/pseries/setup.c | 5 ++++ arch/powerpc/platforms/pseries/Kconfig | 1 + 3 files changed, 42 insertions(+) -- 2.17.1
