diff mbox series

[v2,09/10] MIPS: traps: Enhance memblock ebase allocation process

Message ID 20231027221106.405666-10-jiaxun.yang@flygoat.com
State New
Headers
Series MIPS: Fix kernel in XKPHYS |

Commit Message

Jiaxun Yang Oct. 27, 2023, 10:11 p.m. UTC 
  We try to allocate from KSEG0 accessible space first, and
then if we really can't allocate any memory from KSEG0 and
we are sure that we support ebase in higher segment, give
it another go without restriction.

This can maximize the possibility of having ebase in KSEG0.

Signed-off-by: Jiaxun Yang <jiaxun.yang@flygoat.com>
---
 arch/mips/kernel/traps.c | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)
diff mbox series

Patch

diff --git a/arch/mips/kernel/traps.c b/arch/mips/kernel/traps.c
index b6e94654f621..68f1dd54cde1 100644
--- a/arch/mips/kernel/traps.c
+++ b/arch/mips/kernel/traps.c
@@ -2399,7 +2399,12 @@  void __init trap_init(void)
 		memblock_reserve(ebase_pa, vec_size);
 	} else {
 		vec_size = max(vec_size, PAGE_SIZE);
-		ebase_pa = memblock_phys_alloc(vec_size, 1 << fls(vec_size));
+		ebase_pa = memblock_phys_alloc_range(vec_size, 1 << fls(vec_size),
+						     0x0, KSEGX_SIZE - 1);
+
+		if (!ebase_pa && (IS_ENABLED(CONFIG_EVA) || cpu_has_ebase_wg))
+			ebase_pa = memblock_phys_alloc(vec_size, 1 << fls(vec_size));
+
 		if (!ebase_pa)
 			panic("%s: Failed to allocate %lu bytes align=0x%x\n",
 			      __func__, vec_size, 1 << fls(vec_size));