linux-kernel - [PATCH v2 2/2] MIPS: generic: enable SMP on SMVP systems

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Message-Id: <20211218100511.42508-3-sander@svanheule.net>
Date:   Sat, 18 Dec 2021 11:05:11 +0100
From:   Sander Vanheule <sander@...nheule.net>
To:     linux-mips@...r.kernel.org
Cc:     INAGAKI Hiroshi <musashino.open@...il.com>,
        Jiaxun Yang <jiaxun.yang@...goat.com>,
        Paul Burton <paulburton@...nel.org>,
        Thomas Bogendoerfer <tsbogend@...ha.franken.de>,
        linux-kernel@...r.kernel.org,
        Sander Vanheule <sander@...nheule.net>
Subject: [PATCH v2 2/2] MIPS: generic: enable SMP on SMVP systems

In addition to CPS SMP setups, also try to initialise MT SMP setups with
multiple VPEs per CPU core. CMP SMP support is not provided as it is
considered deprecated.

Additionally, rework the code by dropping the err variable and make it
similar to how other platforms perform this initialisation.

Co-developed-by: INAGAKI Hiroshi <musashino.open@...il.com>
Signed-off-by: INAGAKI Hiroshi <musashino.open@...il.com>
Signed-off-by: Sander Vanheule <sander@...nheule.net>
---
 arch/mips/generic/init.c | 11 ++++++-----
 1 file changed, 6 insertions(+), 5 deletions(-)

diff --git a/arch/mips/generic/init.c b/arch/mips/generic/init.c
index 1842cddd8356..1d712eac1617 100644
--- a/arch/mips/generic/init.c
+++ b/arch/mips/generic/init.c
@@ -110,14 +110,15 @@ void __init plat_mem_setup(void)
 
 void __init device_tree_init(void)
 {
-	int err;
-
 	unflatten_and_copy_device_tree();
 	mips_cpc_probe();
 
-	err = register_cps_smp_ops();
-	if (err)
-		err = register_up_smp_ops();
+	if (!register_cps_smp_ops())
+		return;
+	if (!register_vsmp_smp_ops())
+		return;
+
+	register_up_smp_ops();
 }
 
 int __init apply_mips_fdt_fixups(void *fdt_out, size_t fdt_out_size,
-- 
2.33.1