Aneesh Kumar K.V a2087c04a2 powerpc/book3s64/hash/4k: Support large linear mapping range with 4K ... [ Upstream commit 7746406baa ] With commit: 0034d395f8 ("powerpc/mm/hash64: Map all the kernel regions in the same 0xc range"), we now split the 64TB address range into 4 contexts each of 16TB. That implies we can do only 16TB linear mapping. On some systems, eg. Power9, memory attached to nodes > 0 will appear above 16TB in the linear mapping. This resulted in kernel crash when we boot such systems in hash translation mode with 4K PAGE_SIZE. This patch updates the kernel mapping such that we now start supporting upto 61TB of memory with 4K. The kernel mapping now looks like below 4K PAGE_SIZE and hash translation. vmalloc start = 0xc0003d0000000000 IO start = 0xc0003e0000000000 vmemmap start = 0xc0003f0000000000 Our MAX_PHYSMEM_BITS for 4K is still 64TB even though we can only map 61TB. We prevent bolt mapping anything outside 61TB range by checking against H_VMALLOC_START. Fixes: 0034d395f8 ("powerpc/mm/hash64: Map all the kernel regions in the same 0xc range") Reported-by: Cameron Berkenpas <cam@neo-zeon.de> Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.ibm.com> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au> Link: https://lore.kernel.org/r/20200608070904.387440-3-aneesh.kumar@linux.ibm.com Signed-off-by: Sasha Levin <sashal@kernel.org>		2020-10-29 09:57:48 +01:00
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32	powerpc/32s: Fix another build failure with CONFIG_PPC_KUAP_DEBUG	2020-06-22 09:31:23 +02:00
64	powerpc/book3s64/hash/4k: Support large linear mapping range with 4K	2020-10-29 09:57:48 +01:00
pgalloc.h	License cleanup: add SPDX GPL-2.0 license identifier to files with no license	2017-11-02 11:10:55 +01:00
pgtable.h	powerpc/mm: define empty update_mmu_cache() as static inline	2019-08-20 21:22:14 +10:00
tlbflush.h	powerpc: split asm/tlbflush.h	2018-07-30 22:48:21 +10:00