5.4-stable review patch. If anyone has any objections, please let me know.
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From: Pu Wen puwen@hygon.cn
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@hygon.cn Signed-off-by: Thomas Gleixner tglx@linutronix.de Acked-by: Peter Zijlstra (Intel) peterz@infradead.org Cc: stable@vger.kernel.org Link: https://lore.kernel.org/r/tencent_594804A808BD93A4EBF50A994F228E3A7F07@qq.co... Link: https://lore.kernel.org/r/20230814085112.089607918@linutronix.de Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org --- 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 @@ -88,8 +88,12 @@ 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)) {