kernel/linux.git/arch/powerpc/include/asm/page.h, branch linux-5.3.y

Merge tag 'powerpc-5.2-5' of git://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux

2019-06-22T16:09:42+00:00

Pull powerpc fixes from Michael Ellerman: "This is a frustratingly large batch at rc5. Some of these were sent earlier but were missed by me due to being distracted by other things, and some took a while to track down due to needing manual bisection on old hardware. But still we clearly need to improve our testing of KVM, and of 32-bit, so that we catch these earlier. Summary: seven fixes, all for bugs introduced this cycle. - The commit to add KASAN support broke booting on 32-bit SMP machines, due to a refactoring that moved some setup out of the secondary CPU path. - A fix for another 32-bit SMP bug introduced by the fast syscall entry implementation for 32-bit BOOKE. And a build fix for the same commit. - Our change to allow the DAWR to be force enabled on Power9 introduced a bug in KVM, where we clobber r3 leading to a host crash. - The same commit also exposed a previously unreachable bug in the nested KVM handling of DAWR, which could lead to an oops in a nested host. - One of the DMA reworks broke the b43legacy WiFi driver on some people's powermacs, fix it by enabling a 30-bit ZONE_DMA on 32-bit. - A fix for TLB flushing in KVM introduced a new bug, as it neglected to also flush the ERAT, this could lead to memory corruption in the guest. Thanks to: Aaro Koskinen, Christoph Hellwig, Christophe Leroy, Larry Finger, Michael Neuling, Suraj Jitindar Singh" * tag 'powerpc-5.2-5' of git://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux: KVM: PPC: Book3S HV: Invalidate ERAT when flushing guest TLB entries powerpc: enable a 30-bit ZONE_DMA for 32-bit pmac KVM: PPC: Book3S HV: Only write DAWR[X] when handling h_set_dawr in real mode KVM: PPC: Book3S HV: Fix r3 corruption in h_set_dabr() powerpc/32: fix build failure on book3e with KVM powerpc/booke: fix fast syscall entry on SMP powerpc/32s: fix initial setup of segment registers on secondary CPU

powerpc: enable a 30-bit ZONE_DMA for 32-bit pmac

2019-06-19T12:31:20+00:00

With the strict dma mask checking introduced with the switch to the generic DMA direct code common wifi chips on 32-bit powerbooks stopped working. Add a 30-bit ZONE_DMA to the 32-bit pmac builds to allow them to reliably allocate dma coherent memory. Fixes: 65a21b71f948 ("powerpc/dma: remove dma_nommu_dma_supported") Reported-by: Aaro Koskinen Signed-off-by: Christoph Hellwig Tested-by: Larry Finger Acked-by: Larry Finger Tested-by: Aaro Koskinen Signed-off-by: Michael Ellerman

treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 152

2019-05-30T18:26:32+00:00

Based on 1 normalized pattern(s): this program is free software you can redistribute it and or modify it under the terms of the gnu general public license as published by the free software foundation either version 2 of the license or at your option any later version extracted by the scancode license scanner the SPDX license identifier GPL-2.0-or-later has been chosen to replace the boilerplate/reference in 3029 file(s). Signed-off-by: Thomas Gleixner Reviewed-by: Allison Randal Cc: linux-spdx@vger.kernel.org Link: https://lkml.kernel.org/r/20190527070032.746973796@linutronix.de Signed-off-by: Greg Kroah-Hartman

powerpc/mm: cleanup HPAGE_SHIFT setup

2019-05-02T15:20:24+00:00

Only book3s/64 may select default among several HPAGE_SHIFT at runtime. 8xx always defines 512K pages as default FSL_BOOK3E always defines 4M pages as default This patch limits HUGETLB_PAGE_SIZE_VARIABLE to book3s/64 moves the definitions in subarches files. Signed-off-by: Christophe Leroy Signed-off-by: Michael Ellerman

powerpc/mm: move hugetlb_disabled into asm/hugetlb.h

2019-05-02T15:20:24+00:00

No need to have this in asm/page.h, move it into asm/hugetlb.h Signed-off-by: Christophe Leroy Signed-off-by: Michael Ellerman

powerpc/mm: Drop the unnecessary region check

2019-04-21T13:12:40+00:00

All the regions are now mapped with top nibble 0xc. Hence the region id check is not needed for virt_addr_valid() Signed-off-by: Aneesh Kumar K.V Signed-off-by: Michael Ellerman

powerpc/mm/hash64: Map all the kernel regions in the same 0xc range

2019-04-21T13:12:39+00:00

This patch maps vmalloc, IO and vmemap regions in the 0xc address range instead of the current 0xd and 0xf range. This brings the mapping closer to radix translation mode. With hash 64K page size each of this region is 512TB whereas with 4K config we are limited by the max page table range of 64TB and hence there regions are of 16TB size. The kernel mapping is now: On 4K hash kernel_region_map_size = 16TB kernel vmalloc start = 0xc000100000000000 kernel IO start = 0xc000200000000000 kernel vmemmap start = 0xc000300000000000 64K hash, 64K radix and 4k radix: kernel_region_map_size = 512TB kernel vmalloc start = 0xc008000000000000 kernel IO start = 0xc00a000000000000 kernel vmemmap start = 0xc00c000000000000 Signed-off-by: Aneesh Kumar K.V Signed-off-by: Michael Ellerman

powerpc/kconfig: define PAGE_SHIFT inside Kconfig

2019-02-23T10:04:32+00:00

This patch defined CONFIG_PPC_PAGE_SHIFT in order to be able to use PAGE_SHIFT value inside Kconfig. Signed-off-by: Christophe Leroy Signed-off-by: Michael Ellerman

powerpc: Drop page_is_ram() and walk_system_ram_range()

2019-02-04T10:22:06+00:00

Since commit c40dd2f76644 ("powerpc: Add System RAM to /proc/iomem") it is possible to use the generic walk_system_ram_range() and the generic page_is_ram(). To enable the use of walk_system_ram_range() by the IBM EHEA ethernet driver, we still need an export of the generic function. As powerpc was the only user of CONFIG_ARCH_HAS_WALK_MEMORY, the ifdef around the generic walk_system_ram_range() has become useless and can be dropped. Fixes: c40dd2f76644 ("powerpc: Add System RAM to /proc/iomem") Signed-off-by: Christophe Leroy [mpe: Keep the EXPORT_SYMBOL_GPL in powerpc code] Signed-off-by: Michael Ellerman

powerpc: use mm zones more sensibly

2018-12-20T11:21:20+00:00

Powerpc has somewhat odd usage where ZONE_DMA is used for all memory on common 64-bit configfs, and ZONE_DMA32 is used for 31-bit schemes. Move to a scheme closer to what other architectures use (and I dare to say the intent of the system): - ZONE_DMA: optionally for memory < 31-bit (64-bit embedded only) - ZONE_NORMAL: everything addressable by the kernel - ZONE_HIGHMEM: memory > 32-bit for 32-bit kernels Also provide information on how ZONE_DMA is used by defining ARCH_ZONE_DMA_BITS. Contains various fixes from Benjamin Herrenschmidt. Signed-off-by: Christoph Hellwig Signed-off-by: Michael Ellerman