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[v4,11/22] MIPS: traps: Enhance memblock ebase allocation process

Message ID 20231208161249.1827174-12-gregory.clement@bootlin.com (mailing list archive)
State Superseded
Headers show
Series Add support for the Mobileye EyeQ5 SoC | expand

Commit Message

Gregory CLEMENT Dec. 8, 2023, 4:12 p.m. UTC 
From: Jiaxun Yang <jiaxun.yang@flygoat.com>

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 b6e94654f6211..68f1dd54cde1c 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));