[PATCH 4/4] test: selftest: mmu: skip mirroring tests when not supported

[Ahmad Fatoum <a.fatoum@barebox.org>]

PowerPC e500 uses large CAM-style TLB entries that can't do arbitrary
virtual-to-physical remapping. When arch_remap_range returns -ENOSYS
for the mirroring case, skip the 6 mirroring subtests instead of
counting them as failures.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
Signed-off-by: Ahmad Fatoum <a.fatoum@barebox.org>
---
 test/self/mmu.c | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/test/self/mmu.c b/test/self/mmu.c
index f5a09d76131e..1dd42db7e9c1 100644
--- a/test/self/mmu.c
+++ b/test/self/mmu.c
@@ -107,6 +107,10 @@ static void test_remap(void)
 	expect_success(ret, "asserting no mirror before remap");
 
 	ret = arch_remap_range(mirror, buffer_phys, TEST_BUFFER_SIZE, MAP_UNCACHED);
+	if (ret == -ENOSYS) {
+		skipped_tests += 6;
+		goto skip_mirroring;
+	}
 	expect_success(ret, "remapping with mirroring");
 
 	for (i = 0; i < TEST_BUFFER_SIZE; i += sizeof(u32)) {
@@ -150,6 +154,8 @@ static void test_remap(void)
 
 	expect_success(ret, "asserting mirroring after remap (virt += 4K)");
 
+skip_mirroring:
+
 	ret = remap_range(buffer, TEST_BUFFER_SIZE, MAP_DEFAULT);
 	expect_success(ret, "remapping buffer with default attrs");
 	memtest(buffer, TEST_BUFFER_SIZE, "newly cached buffer");
-- 
2.47.3