Thiago Jung Bauermann eae9eec476 powerpc/pseries/svm: Allocate SWIOTLB buffer anywhere in memory ... POWER secure guests (i.e., guests which use the Protected Execution Facility) need to use SWIOTLB to be able to do I/O with the hypervisor, but they don't need the SWIOTLB memory to be in low addresses since the hypervisor doesn't have any addressing limitation. This solves a SWIOTLB initialization problem we are seeing in secure guests with 128 GB of RAM: they are configured with 4 GB of crashkernel reserved memory, which leaves no space for SWIOTLB in low addresses. To do this, we use mostly the same code as swiotlb_init(), but allocate the buffer using memblock_alloc() instead of memblock_alloc_low(). Fixes: 2efbc58f15 ("powerpc/pseries/svm: Force SWIOTLB for secure guests") Signed-off-by: Thiago Jung Bauermann <bauerman@linux.ibm.com> Reviewed-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au> Link: https://lore.kernel.org/r/20200818221126.391073-1-bauerman@linux.ibm.com		2020-09-14 23:07:14 +10:00
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asm	powerpc/pseries/svm: Allocate SWIOTLB buffer anywhere in memory	2020-09-14 23:07:14 +10:00
uapi/asm	Revert "powerpc/64s: Remove PROT_SAO support"	2020-08-24 14:12:53 +10:00