FEX-Emu/linux
1
0
Fork 0
mirror of https://github.com/FEX-Emu/linux.git synced 2025-01-11 11:56:48 +00:00
Code Issues Actions Packages Projects Releases Wiki Activity

powerpc/mm/radix: Limit paca allocation in radix

Browse Source 
On return from RTAS we access the paca variables and we have 64 bit
disabled. This requires us to limit paca in 32 bit range.

Fix this by setting ppc64_rma_size to first_memblock_size/1G range.

Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
This commit is contained in:
Aneesh Kumar K.V 2016-04-29 23:26:10 +10:00 committed by Michael Ellerman
parent 764041e0f4
commit 177ba7c647
1 changed files with 19 additions and 1 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

20
arch/powerpc/mm/pgtable-radix.c
View File

@ -351,7 +351,25 @@ void radix__early_init_mmu_secondary(void)
void radix__setup_initial_memory_limit(phys_addr_t first_memblock_base,
phys_addr_t first_memblock_size)
{
/* Finally limit subsequent allocations */
/* We don't currently support the first MEMBLOCK not mapping 0
* physical on those processors
*/
BUG_ON(first_memblock_base != 0);
/*
* We limit the allocation that depend on ppc64_rma_size
* to first_memblock_size. We also clamp it to 1GB to
* avoid some funky things such as RTAS bugs.
*
* On radix config we really don't have a limitation
* on real mode access. But keeping it as above works
* well enough.
*/
ppc64_rma_size = min_t(u64, first_memblock_size, 0x40000000);
/*
* Finally limit subsequent allocations. We really don't want
* to limit the memblock allocations to rma_size. FIXME!! should
* we even limit at all ?
*/
memblock_set_current_limit(first_memblock_base + first_memblock_size);
}