linux-kernel - [RFC PATCH] x86/cpu/hygon: Set __max_die_per

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Message-ID: <20210225130407.21629-1-puwen@hygon.cn>
Date:   Thu, 25 Feb 2021 21:04:07 +0800
From:   Pu Wen <puwen@...on.cn>
To:     <x86@...nel.org>
CC:     <linux-kernel@...r.kernel.org>, <bp@...en8.de>,
        <tglx@...utronix.de>, <mingo@...hat.com>, <hpa@...or.com>,
        <Yazen.Ghannam@....com>, <johnathan.smithinovic@....at>,
        <rkitover@...il.com>, Pu Wen <puwen@...on.cn>
Subject: [RFC PATCH] x86/cpu/hygon: Set __max_die_per_package on Hygon

Set the maximum DIE per package variable on Hygon using the
nodes_per_socket value in order to do per-DIE manipulations
by driver such as powercap.

Signed-off-by: Pu Wen <puwen@...on.cn>
---
 arch/x86/kernel/cpu/hygon.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/arch/x86/kernel/cpu/hygon.c b/arch/x86/kernel/cpu/hygon.c
index ae59115d18f9..0bd6c74e3ba1 100644
--- a/arch/x86/kernel/cpu/hygon.c
+++ b/arch/x86/kernel/cpu/hygon.c
@@ -215,12 +215,12 @@ static void bsp_init_hygon(struct cpuinfo_x86 *c)
 		u32 ecx;
 
 		ecx = cpuid_ecx(0x8000001e);
-		nodes_per_socket = ((ecx >> 8) & 7) + 1;
+		__max_die_per_package = nodes_per_socket = ((ecx >> 8) & 7) + 1;
 	} else if (boot_cpu_has(X86_FEATURE_NODEID_MSR)) {
 		u64 value;
 
 		rdmsrl(MSR_FAM10H_NODE_ID, value);
-		nodes_per_socket = ((value >> 3) & 7) + 1;
+		__max_die_per_package = nodes_per_socket = ((value >> 3) & 7) + 1;
 	}
 
 	if (!boot_cpu_has(X86_FEATURE_AMD_SSBD) &&
-- 
2.23.0