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x86/cpu/amd: Set __max_die_per_package on AMD

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commit 76e2fc63ca40977af893b724b00cc2f8e9ce47a4 upstream.

Set the maximum DIE per package variable on AMD using the
NodesPerProcessor topology value. This will be used by RAPL, among
others, to determine the maximum number of DIEs on the system in order
to do per-DIE manipulations.

 [ bp: Productize into a proper patch. ]

Fixes: 028c221ed190 ("x86/CPU/AMD: Save AMD NodeId as cpu_die_id")
Reported-by: Johnathan Smithinovic <johnathan.smithinovic@gmx.at>
Reported-by: Rafael Kitover <rkitover@gmail.com>
Signed-off-by: Yazen Ghannam <Yazen.Ghannam@amd.com>
Signed-off-by: Borislav Petkov <bp@suse.de>
Tested-by: Johnathan Smithinovic <johnathan.smithinovic@gmx.at>
Tested-by: Rafael Kitover <rkitover@gmail.com>
Link: https://bugzilla.kernel.org/show_bug.cgi?id=210939
Link: https://lkml.kernel.org/r/20210106112106.GE5729@zn.tnic
Link: https://lkml.kernel.org/r/20210111101455.1194-1-bp@alien8.de
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Yazen Ghannam 2021-01-11 11:04:29 +01:00 committed by Greg Kroah-Hartman
parent 0b3efe55e5
commit 23d02ee1d4
1 changed files with 2 additions and 2 deletions
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4
arch/x86/kernel/cpu/amd.c
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@ -569,12 +569,12 @@ static void bsp_init_amd(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) &&