[PATCH v6 2/4] armv8: mmu: teach the pagetable dumper to show explicit FAULT maps

[Casey Connolly]

When a region is explicitly unmapped (like with
mmu_change_region_attr(.... PTE_TYPE_FAULT)) the address translation
still remains but won't be used since the region is marked invalid.
Print these regions when we dump the pagetable to help with debugging.

Signed-off-by: Casey Connolly <casey.connolly at linaro.org>
---
 arch/arm/cpu/armv8/cache_v8.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/arch/arm/cpu/armv8/cache_v8.c b/arch/arm/cpu/armv8/cache_v8.c
index f07204ed2fad..91c55591a1d9 100644
--- a/arch/arm/cpu/armv8/cache_v8.c
+++ b/arch/arm/cpu/armv8/cache_v8.c
@@ -533,9 +533,9 @@ static void __pagetable_walk(u64 addr, u64 tcr, int level, pte_walker_cb_t cb, v
 
 		if (exit)
 			return;
 
-		if (pte_type(&pte) == PTE_TYPE_FAULT)
+		if (!pte)
 			continue;
 
 		attrs = pte & ALL_ATTRS;
 		/* If we're currently inside a block or set of pages */
@@ -572,9 +572,9 @@ static void __pagetable_walk(u64 addr, u64 tcr, int level, pte_walker_cb_t cb, v
 
 			/* Go down a level */
 			__pagetable_walk(_addr, tcr, level + 1, cb, priv);
 			state[level] = WALKER_STATE_START;
-		} else if (pte_type(&pte) == PTE_TYPE_BLOCK || pte_type(&pte) == PTE_TYPE_PAGE) {
+		} else {
 			/* We foud a block or page, start walking */
 			entry_start = pte;
 			state[level] = WALKER_STATE_REGION;
 		}

-- 
2.53.0