linux-kernel - [tip: x86/platform] x86/platform/uv: Update node present counting

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Date:   Wed, 07 Oct 2020 07:12:01 -0000
From:   "tip-bot2 for Mike Travis" <tip-bot2@...utronix.de>
To:     linux-tip-commits@...r.kernel.org
Cc:     Mike Travis <mike.travis@....com>, Borislav Petkov <bp@...e.de>,
        Dimitri Sivanich <dimitri.sivanich@....com>,
        Steve Wahl <steve.wahl@....com>, x86 <x86@...nel.org>,
        LKML <linux-kernel@...r.kernel.org>
Subject: [tip: x86/platform] x86/platform/uv: Update node present counting

The following commit has been merged into the x86/platform branch of tip:

Commit-ID:     d6922effe4f3d5c643c8c05d51a572d6db4c9cb3
Gitweb:        https://git.kernel.org/tip/d6922effe4f3d5c643c8c05d51a572d6db4c9cb3
Author:        Mike Travis <mike.travis@....com>
AuthorDate:    Mon, 05 Oct 2020 15:39:26 -05:00
Committer:     Borislav Petkov <bp@...e.de>
CommitterDate: Wed, 07 Oct 2020 09:08:35 +02:00

x86/platform/uv: Update node present counting

The changes in the UV5 arch shrunk the NODE PRESENT table to just 2x64
entries (128 total) so are in to 64 bit MMRs instead of a depth of 64
bits in an array.  Adjust references when counting up the nodes present.

Signed-off-by: Mike Travis <mike.travis@....com>
Signed-off-by: Borislav Petkov <bp@...e.de>
Reviewed-by: Dimitri Sivanich <dimitri.sivanich@....com>
Reviewed-by: Steve Wahl <steve.wahl@....com>
Link: https://lkml.kernel.org/r/20201005203929.148656-11-mike.travis@hpe.com
---
 arch/x86/kernel/apic/x2apic_uv_x.c | 26 +++++++++++++++++++-------
 1 file changed, 19 insertions(+), 7 deletions(-)

diff --git a/arch/x86/kernel/apic/x2apic_uv_x.c b/arch/x86/kernel/apic/x2apic_uv_x.c
index 64a1c59..9b44f45 100644
--- a/arch/x86/kernel/apic/x2apic_uv_x.c
+++ b/arch/x86/kernel/apic/x2apic_uv_x.c
@@ -1436,20 +1436,32 @@ static int __init decode_uv_systab(void)
 /* Set up physical blade translations from UVH_NODE_PRESENT_TABLE */
 static __init void boot_init_possible_blades(struct uv_hub_info_s *hub_info)
 {
+	unsigned long np;
 	int i, uv_pb = 0;
 
-	pr_info("UV: NODE_PRESENT_DEPTH = %d\n", UVH_NODE_PRESENT_TABLE_DEPTH);
-	for (i = 0; i < UVH_NODE_PRESENT_TABLE_DEPTH; i++) {
-		unsigned long np;
-
-		np = uv_read_local_mmr(UVH_NODE_PRESENT_TABLE + i * 8);
-		if (np)
+	if (UVH_NODE_PRESENT_TABLE) {
+		pr_info("UV: NODE_PRESENT_DEPTH = %d\n",
+			UVH_NODE_PRESENT_TABLE_DEPTH);
+		for (i = 0; i < UVH_NODE_PRESENT_TABLE_DEPTH; i++) {
+			np = uv_read_local_mmr(UVH_NODE_PRESENT_TABLE + i * 8);
 			pr_info("UV: NODE_PRESENT(%d) = 0x%016lx\n", i, np);
-
+			uv_pb += hweight64(np);
+		}
+	}
+	if (UVH_NODE_PRESENT_0) {
+		np = uv_read_local_mmr(UVH_NODE_PRESENT_0);
+		pr_info("UV: NODE_PRESENT_0 = 0x%016lx\n", np);
+		uv_pb += hweight64(np);
+	}
+	if (UVH_NODE_PRESENT_1) {
+		np = uv_read_local_mmr(UVH_NODE_PRESENT_1);
+		pr_info("UV: NODE_PRESENT_1 = 0x%016lx\n", np);
 		uv_pb += hweight64(np);
 	}
 	if (uv_possible_blades != uv_pb)
 		uv_possible_blades = uv_pb;
+
+	pr_info("UV: number nodes/possible blades %d\n", uv_pb);
 }
 
 static void __init build_socket_tables(void)