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

Commit-ID: ee545b94d39a00c93dc98b1dbcbcf731d2eadeb4 Gitweb: https://git.kernel.org/tip/ee545b94d39a00c93dc98b1dbcbcf731d2eadeb4 Author: Pu Wen puwen@hygon.cn AuthorDate: Mon, 14 Aug 2023 10:18:26 +02:00 Committer: Thomas Gleixner tglx@linutronix.de CommitterDate: Tue, 10 Oct 2023 14:38:16 +02:00

x86/cpu/hygon: Fix the CPU topology evaluation for real

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 --- arch/x86/kernel/cpu/hygon.c | 8 ++++++-- 1 file changed, 6 insertions(+), 2 deletions(-)

diff --git a/arch/x86/kernel/cpu/hygon.c b/arch/x86/kernel/cpu/hygon.c index defdc59..a7b3ef4 100644 --- a/arch/x86/kernel/cpu/hygon.c +++ b/arch/x86/kernel/cpu/hygon.c @@ -87,8 +87,12 @@ static void hygon_get_topology(struct cpuinfo_x86 *c) 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)) {