On Tue, Nov 26, 2019 at 05:40:26PM +0100, Christoph Hellwig wrote: > On Tue, Nov 26, 2019 at 12:26:38PM +0100, Christian Zigotzky wrote: > > Hello Christoph, > > > > The PCI TV card works with your patch! I was able to patch your Git kernel > > with the patch above. > > > > I haven't found any error messages in the dmesg yet. > > Thanks. Unfortunately this is a bit of a hack as we need to set > the mask based on runtime information like the magic FSL PCIe window. > Let me try to draft something better up, and thanks already for testing > this one! Maybe we'll simply force bottom up allocation before calling swiotlb_init()? Anyway, it's the last memblock allocation. diff --git a/arch/powerpc/mm/mem.c b/arch/powerpc/mm/mem.c index 62f74b1b33bd..771e6cf7e2b9 100644 --- a/arch/powerpc/mm/mem.c +++ b/arch/powerpc/mm/mem.c @@ -286,14 +286,15 @@ void __init mem_init(void) /* * book3s is limited to 16 page sizes due to encoding this in * a 4-bit field for slices. */ BUILD_BUG_ON(MMU_PAGE_COUNT > 16); #ifdef CONFIG_SWIOTLB + memblock_set_bottom_up(true); swiotlb_init(0); #endif high_memory = (void *) __va(max_low_pfn * PAGE_SIZE); set_max_mapnr(max_pfn); memblock_free_all(); -- Sincerely yours, Mike.
