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| author | Benjamin Herrenschmidt <benh@kernel.crashing.org> | 2016-08-19 11:52:37 +0300 |
|---|---|---|
| committer | Michael Ellerman <mpe@ellerman.id.au> | 2016-09-23 00:54:17 +0300 |
| commit | fe036a0605d60d6c81ffdcd6241e9ae0013fe235 (patch) | |
| tree | e4bd3548c3454415fd22cc0b243d4dfd452712ac /arch/powerpc/mm/pgtable-radix.c | |
| parent | fc48bad53142c991a5280940fd7ee8d226697b2c (diff) | |
| download | linux-fe036a0605d60d6c81ffdcd6241e9ae0013fe235.tar.xz | |
powerpc/64/kexec: Fix MMU cleanup on radix
Just using the hash ops won't work anymore since radix will have
NULL in there. Instead create an mmu_cleanup_all() function which
will do the right thing based on the MMU mode.
For Radix, for now I clear UPRT and the PTCR, effectively switching
back to Radix with no partition table setup.
Currently set it to NULL on BookE thought it might be a good idea
to wipe the TLB there (Scott ?)
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
Acked-by: Balbir Singh <bsingharora@gmail.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Diffstat (limited to 'arch/powerpc/mm/pgtable-radix.c')
| -rw-r--r-- | arch/powerpc/mm/pgtable-radix.c | 12 |
1 files changed, 12 insertions, 0 deletions
diff --git a/arch/powerpc/mm/pgtable-radix.c b/arch/powerpc/mm/pgtable-radix.c index 8f086352e421..ed7bddc456b7 100644 --- a/arch/powerpc/mm/pgtable-radix.c +++ b/arch/powerpc/mm/pgtable-radix.c @@ -396,6 +396,18 @@ void radix__early_init_mmu_secondary(void) } } +void radix__mmu_cleanup_all(void) +{ + unsigned long lpcr; + + if (!firmware_has_feature(FW_FEATURE_LPAR)) { + lpcr = mfspr(SPRN_LPCR); + mtspr(SPRN_LPCR, lpcr & ~LPCR_UPRT); + mtspr(SPRN_PTCR, 0); + radix__flush_tlb_all(); + } +} + void radix__setup_initial_memory_limit(phys_addr_t first_memblock_base, phys_addr_t first_memblock_size) { |