linux-kernel - [PATCH v4 03/26] MIPS: sgi-ip27: ensure node_possible

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Message-ID: <20240807064110.1003856-4-rppt@kernel.org>
Date: Wed,  7 Aug 2024 09:40:47 +0300
From: Mike Rapoport <rppt@...nel.org>
To: linux-kernel@...r.kernel.org
Cc: Alexander Gordeev <agordeev@...ux.ibm.com>,
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	Jonathan Cameron <Jonathan.Cameron@...wei.com>
Subject: [PATCH v4 03/26] MIPS: sgi-ip27: ensure node_possible_map only contains valid nodes

From: "Mike Rapoport (Microsoft)" <rppt@...nel.org>

For SGI IP27 machines node_possible_map is statically set to
NODE_MASK_ALL and it is not updated during NUMA initialization.

Ensure that it only contains nodes present in the system.

Signed-off-by: Mike Rapoport (Microsoft) <rppt@...nel.org>
Reviewed-by: Jonathan Cameron <Jonathan.Cameron@...wei.com>
Tested-by: Jonathan Cameron <Jonathan.Cameron@...wei.com> [arm64 + CXL via QEMU]
Acked-by: Dan Williams <dan.j.williams@...el.com>
Acked-by: David Hildenbrand <david@...hat.com>
---
 arch/mips/sgi-ip27/ip27-smp.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/arch/mips/sgi-ip27/ip27-smp.c b/arch/mips/sgi-ip27/ip27-smp.c
index 5d2652a1d35a..62733e049570 100644
--- a/arch/mips/sgi-ip27/ip27-smp.c
+++ b/arch/mips/sgi-ip27/ip27-smp.c
@@ -70,11 +70,13 @@ void cpu_node_probe(void)
 	gda_t *gdap = GDA;
 
 	nodes_clear(node_online_map);
+	nodes_clear(node_possible_map);
 	for (i = 0; i < MAX_NUMNODES; i++) {
 		nasid_t nasid = gdap->g_nasidtable[i];
 		if (nasid == INVALID_NASID)
 			break;
 		node_set_online(nasid);
+		node_set(nasid, node_possible_map);
 		highest = node_scan_cpus(nasid, highest);
 	}
 
-- 
2.43.0