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 <[email protected]> --- Changes in v2: - New patch, in response to clarification on patch 5. arch/mips/mm/tlbex.c | 3 +++ 1 file changed, 3 insertions(+) diff --git a/arch/mips/mm/tlbex.c b/arch/mips/mm/tlbex.c index 3f1a8a2..9c39c66 100644 --- a/arch/mips/mm/tlbex.c +++ b/arch/mips/mm/tlbex.c @@ -2395,6 +2395,9 @@ 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\n"); + output_pgtable_bits_defines(); check_pabits(); -- 2.8.0
