From: Laurent Dufour <ldufour@linux.ibm.com>
To: linux-kernel@vger.kernel.org
Cc: linux-arch@vger.kernel.org, x86@kernel.org,
linuxppc-dev@lists.ozlabs.org, mpe@ellerman.id.au,
npiggin@gmail.com, christophe.leroy@csgroup.eu,
tglx@linutronix.de, dave.hansen@linux.intel.com,
mingo@redhat.com, bp@alien8.de
Subject: [PATCH 10/10] powerpc/pseries: Honour current SMT state when DLPAR onlining CPUs
Date: Thu, 15 Jun 2023 17:46:35 +0200 [thread overview]
Message-ID: <20230615154635.13660-11-ldufour@linux.ibm.com> (raw)
In-Reply-To: <20230615154635.13660-1-ldufour@linux.ibm.com>
From: Michael Ellerman <mpe@ellerman.id.au>
Integrate with the generic SMT support, so that when a CPU is DLPAR
onlined it is brought up with the correct SMT mode.
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
---
arch/powerpc/platforms/pseries/hotplug-cpu.c | 8 ++++++++
1 file changed, 8 insertions(+)
diff --git a/arch/powerpc/platforms/pseries/hotplug-cpu.c b/arch/powerpc/platforms/pseries/hotplug-cpu.c
index 61fb7cb00880..e62835a12d73 100644
--- a/arch/powerpc/platforms/pseries/hotplug-cpu.c
+++ b/arch/powerpc/platforms/pseries/hotplug-cpu.c
@@ -398,6 +398,14 @@ static int dlpar_online_cpu(struct device_node *dn)
for_each_present_cpu(cpu) {
if (get_hard_smp_processor_id(cpu) != thread)
continue;
+
+ if (!topology_is_primary_thread(cpu)) {
+ if (cpu_smt_control != CPU_SMT_ENABLED)
+ break;
+ if (!topology_smt_thread_allowed(cpu))
+ break;
+ }
+
cpu_maps_update_done();
find_and_update_cpu_nid(cpu);
rc = device_online(get_cpu_device(cpu));
--
2.41.0
WARNING: multiple messages have this Message-ID (diff)
From: Laurent Dufour <ldufour@linux.ibm.com>
To: linux-kernel@vger.kernel.org
Cc: linux-arch@vger.kernel.org, dave.hansen@linux.intel.com,
x86@kernel.org, mingo@redhat.com, bp@alien8.de,
npiggin@gmail.com, tglx@linutronix.de,
linuxppc-dev@lists.ozlabs.org
Subject: [PATCH 10/10] powerpc/pseries: Honour current SMT state when DLPAR onlining CPUs
Date: Thu, 15 Jun 2023 17:46:35 +0200 [thread overview]
Message-ID: <20230615154635.13660-11-ldufour@linux.ibm.com> (raw)
In-Reply-To: <20230615154635.13660-1-ldufour@linux.ibm.com>
From: Michael Ellerman <mpe@ellerman.id.au>
Integrate with the generic SMT support, so that when a CPU is DLPAR
onlined it is brought up with the correct SMT mode.
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
---
arch/powerpc/platforms/pseries/hotplug-cpu.c | 8 ++++++++
1 file changed, 8 insertions(+)
diff --git a/arch/powerpc/platforms/pseries/hotplug-cpu.c b/arch/powerpc/platforms/pseries/hotplug-cpu.c
index 61fb7cb00880..e62835a12d73 100644
--- a/arch/powerpc/platforms/pseries/hotplug-cpu.c
+++ b/arch/powerpc/platforms/pseries/hotplug-cpu.c
@@ -398,6 +398,14 @@ static int dlpar_online_cpu(struct device_node *dn)
for_each_present_cpu(cpu) {
if (get_hard_smp_processor_id(cpu) != thread)
continue;
+
+ if (!topology_is_primary_thread(cpu)) {
+ if (cpu_smt_control != CPU_SMT_ENABLED)
+ break;
+ if (!topology_smt_thread_allowed(cpu))
+ break;
+ }
+
cpu_maps_update_done();
find_and_update_cpu_nid(cpu);
rc = device_online(get_cpu_device(cpu));
--
2.41.0
next prev parent reply other threads:[~2023-06-15 15:47 UTC|newest]
Thread overview: 28+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-06-15 15:46 [PATCH 00/10] Introduce SMT level and add PowerPC support Laurent Dufour
2023-06-15 15:46 ` Laurent Dufour
2023-06-15 15:46 ` [PATCH 01/10] cpu/SMT: Move SMT prototypes into cpu_smt.h Laurent Dufour
2023-06-15 15:46 ` Laurent Dufour
2023-06-22 8:51 ` Thomas Gleixner
2023-06-22 8:51 ` Thomas Gleixner
2023-06-15 15:46 ` [PATCH 02/10] cpu/SMT: Move smt/control simple exit cases earlier Laurent Dufour
2023-06-15 15:46 ` Laurent Dufour
2023-06-15 15:46 ` [PATCH 03/10] cpu/SMT: Store the current/max number of threads Laurent Dufour
2023-06-15 15:46 ` Laurent Dufour
2023-06-15 15:46 ` [PATCH 04/10] cpu/SMT: Remove topology_smt_supported() Laurent Dufour
2023-06-15 15:46 ` Laurent Dufour
2023-06-15 15:46 ` [PATCH 05/10] cpu/SMT: Create topology_smt_threads_supported() Laurent Dufour
2023-06-15 15:46 ` Laurent Dufour
2023-06-15 15:46 ` [PATCH 06/10] cpu/SMT: Create topology_smt_thread_allowed() Laurent Dufour
2023-06-15 15:46 ` Laurent Dufour
2023-06-15 15:46 ` [PATCH 07/10] cpu/SMT: Allow enabling partial SMT states via sysfs Laurent Dufour
2023-06-15 15:46 ` Laurent Dufour
2023-06-22 9:12 ` Thomas Gleixner
2023-06-22 9:12 ` Thomas Gleixner
2023-06-22 12:14 ` Michael Ellerman
2023-06-22 12:14 ` Michael Ellerman
2023-06-15 15:46 ` [PATCH 08/10] powerpc/pseries: Initialise CPU hotplug callbacks earlier Laurent Dufour
2023-06-15 15:46 ` Laurent Dufour
2023-06-15 15:46 ` [PATCH 09/10] powerpc: Add HOTPLUG_SMT support Laurent Dufour
2023-06-15 15:46 ` Laurent Dufour
2023-06-15 15:46 ` Laurent Dufour [this message]
2023-06-15 15:46 ` [PATCH 10/10] powerpc/pseries: Honour current SMT state when DLPAR onlining CPUs Laurent Dufour
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