This is a note to let you know that I've just added the patch titled
x86/cpu/hygon: Fix the CPU topology evaluation for real
to the 6.5-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
x86-cpu-hygon-fix-the-cpu-topology-evaluation-for-real.patch
and it can be found in the queue-6.5 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From ee545b94d39a00c93dc98b1dbcbcf731d2eadeb4 Mon Sep 17 00:00:00 2001
From: Pu Wen <puwen@xxxxxxxx>
Date: Mon, 14 Aug 2023 10:18:26 +0200
Subject: x86/cpu/hygon: Fix the CPU topology evaluation for real
From: Pu Wen <puwen@xxxxxxxx>
commit ee545b94d39a00c93dc98b1dbcbcf731d2eadeb4 upstream.
Hygon processors with a model ID > 3 have CPUID leaf 0xB correctly
populated and don't need the fixed package ID shift workaround. The fixup
is also incorrect when running in a guest.
Fixes: e0ceeae708ce ("x86/CPU/hygon: Fix phys_proc_id calculation logic for multi-die processors")
Signed-off-by: Pu Wen <puwen@xxxxxxxx>
Signed-off-by: Thomas Gleixner <tglx@xxxxxxxxxxxxx>
Acked-by: Peter Zijlstra (Intel) <peterz@xxxxxxxxxxxxx>
Cc: <stable@xxxxxxxxxxxxxxx>
Link: https://lore.kernel.org/r/tencent_594804A808BD93A4EBF50A994F228E3A7F07@xxxxxx
Link: https://lore.kernel.org/r/20230814085112.089607918@xxxxxxxxxxxxx
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
arch/x86/kernel/cpu/hygon.c | 8 ++++++--
1 file changed, 6 insertions(+), 2 deletions(-)
--- a/arch/x86/kernel/cpu/hygon.c
+++ b/arch/x86/kernel/cpu/hygon.c
@@ -86,8 +86,12 @@ static void hygon_get_topology(struct cp
if (!err)
c->x86_coreid_bits = get_count_order(c->x86_max_cores);
- /* Socket ID is ApicId[6] for these processors. */
- c->phys_proc_id = c->apicid >> APICID_SOCKET_ID_BIT;
+ /*
+ * Socket ID is ApicId[6] for the processors with model <= 0x3
+ * when running on host.
+ */
+ if (!boot_cpu_has(X86_FEATURE_HYPERVISOR) && c->x86_model <= 0x3)
+ c->phys_proc_id = c->apicid >> APICID_SOCKET_ID_BIT;
cacheinfo_hygon_init_llc_id(c, cpu);
} else if (cpu_has(c, X86_FEATURE_NODEID_MSR)) {
Patches currently in stable-queue which might be from puwen@xxxxxxxx are
queue-6.5/x86-cpu-hygon-fix-the-cpu-topology-evaluation-for-real.patch
