diff options
| author | Paul Burton <paul.burton@imgtec.com> | 2016-04-19 09:25:11 +0100 |
|---|---|---|
| committer | Ralf Baechle <ralf@linux-mips.org> | 2016-05-13 15:30:25 +0200 |
| commit | e56c7e18818dd721179f9ca95c77dd941a360384 (patch) | |
| tree | e1c41054ca9fe9a46872a6bd6c485ae6299ce176 /arch/mips/mm/tlbex.c | |
| parent | 4b6f99d307ed6c7a28b952bfb7b66fb26a6a4cf0 (diff) | |
MIPS: mm: Panic if an XPA kernel is run without RIXI
XPA kernels hardcode for the presence of RIXI - the PTE format & its
handling presume RI & XI bits. Make this dependence explicit by panicing
if we run on a system that violates it.
Signed-off-by: Paul Burton <paul.burton@imgtec.com>
Reviewed-by: James Hogan <james.hogan@imgtec.com>
Cc: Paul Gortmaker <paul.gortmaker@windriver.com>
Cc: linux-mips@linux-mips.org
Cc: linux-kernel@vger.kernel.org
Patchwork: https://patchwork.linux-mips.org/patch/13125/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
Diffstat (limited to 'arch/mips/mm/tlbex.c')
| -rw-r--r-- | arch/mips/mm/tlbex.c | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/arch/mips/mm/tlbex.c b/arch/mips/mm/tlbex.c index 0efa6211cc40..274da90adf0d 100644 --- a/arch/mips/mm/tlbex.c +++ b/arch/mips/mm/tlbex.c @@ -2508,6 +2508,9 @@ void build_tlb_refill_handler(void) */ static int run_once = 0; + if (config_enabled(CONFIG_XPA) && !cpu_has_rixi) + panic("Kernels supporting XPA currently require CPUs with RIXI"); + output_pgtable_bits_defines(); check_pabits(); |