From: Pasha Tatashin <pasha.tatashin@soleen.com>
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Subject: [RFC PATCH 06/46] x86/smp: Skip offline CPUs for REBOOT_VECTOR in native_stop_other_cpus()
Date: Sun, 20 Sep 2026 15:36:10 -0400 [thread overview]
Message-ID: <20260920193650.3373435-7-pasha.tatashin@soleen.com> (raw)
In-Reply-To: <20260920193650.3373435-1-pasha.tatashin@soleen.com>
In native_stop_other_cpus(), cpus_stop_mask is initialized to
cpu_online_mask minus the calling CPU. However,
apic_send_IPI_allbutself(REBOOT_VECTOR) uses the APIC broadcast
shorthand when enabled, which delivers the IPI to all physical APICs
including offline CPUs.
Use __apic_send_IPI_mask(&cpus_stop_mask, REBOOT_VECTOR) so that
REBOOT_VECTOR is sent only to the target online CPUs in
cpus_stop_mask.
Signed-off-by: Pasha Tatashin <pasha.tatashin@soleen.com>
---
arch/x86/kernel/smp.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/arch/x86/kernel/smp.c b/arch/x86/kernel/smp.c
index 985103cab16c..2449d15c6667 100644
--- a/arch/x86/kernel/smp.c
+++ b/arch/x86/kernel/smp.c
@@ -192,7 +192,7 @@ static void native_stop_other_cpus(int wait)
cpumask_clear_cpu(this_cpu, &cpus_stop_mask);
if (!cpumask_empty(&cpus_stop_mask)) {
- apic_send_IPI_allbutself(REBOOT_VECTOR);
+ __apic_send_IPI_mask(&cpus_stop_mask, REBOOT_VECTOR);
/*
* Don't wait longer than a second for IPI completion. The
--
2.55.0.1082.g2b9226bbc0-goog
next prev parent reply other threads:[~2026-09-20 19:37 UTC|newest]
Thread overview: 49+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-09-20 19:36 [RFC PATCH 00/46] Orphaned Virtual Machines Pasha Tatashin
2026-09-20 19:36 ` [RFC PATCH 01/46] KVM: luo: Delegate VM creation type to kvm_arch_vm_luo_preserve Pasha Tatashin
2026-09-20 19:36 ` [RFC PATCH 02/46] KVM: arm64: Split demux_c15_{get,set}_val from userspace accessors Pasha Tatashin
2026-09-20 19:36 ` [RFC PATCH 03/46] KVM: arm64: Split kvm_sys_reg_{get,set}_user from kernel accessors Pasha Tatashin
2026-09-20 19:36 ` [RFC PATCH 04/46] x86/mm/ident_map: Add force_pte to support 4K PTE identity mappings Pasha Tatashin
2026-09-20 19:36 ` [RFC PATCH 05/46] arm64: mm: Add trans_pgd_map_range() support Pasha Tatashin
2026-09-20 19:36 ` Pasha Tatashin [this message]
2026-09-20 19:36 ` [RFC PATCH 07/46] KVM: luo: Support vCPU file preservation across live updates Pasha Tatashin
2026-09-20 19:36 ` [RFC PATCH 08/46] KVM: x86: Add x86 vCPU LUO preservation ABI and register helpers Pasha Tatashin
2026-09-20 19:36 ` [RFC PATCH 09/46] KVM: x86: Implement architectural vCPU state preservation via LUO Pasha Tatashin
2026-09-20 19:36 ` [RFC PATCH 10/46] KVM: arm64: " Pasha Tatashin
2026-09-20 19:36 ` [RFC PATCH 11/46] liveupdate: Define CPU preservation linker sections Pasha Tatashin
2026-09-20 19:36 ` [RFC PATCH 12/46] liveupdate: Add liveupdate_session_name() helper Pasha Tatashin
2026-09-20 19:36 ` [RFC PATCH 13/46] cpu_preserve: Add physical CPU preservation ABI and core API headers Pasha Tatashin
2026-09-20 19:36 ` [RFC PATCH 14/46] cpu_preserve: Add core physical CPU preservation state and park loop Pasha Tatashin
2026-09-20 19:36 ` [RFC PATCH 15/46] cpu_preserve: Add physical CPU preservation lifecycle and build rules Pasha Tatashin
2026-09-20 19:36 ` [RFC PATCH 16/46] liveupdate: cpu_preserve: Add sysfs interface Pasha Tatashin
2026-09-20 19:36 ` [RFC PATCH 17/46] liveupdate: cpu_preserve: Add isolated address space management API Pasha Tatashin
2026-09-20 19:36 ` [RFC PATCH 18/46] liveupdate: cpu_preserve: Add LUO file handler for preserved physical CPUs Pasha Tatashin
2026-09-20 19:36 ` [RFC PATCH 19/46] x86: liveupdate: Add low-level physical CPU preservation assembly Pasha Tatashin
2026-09-20 19:36 ` [RFC PATCH 20/46] x86: liveupdate: Add physical CPU preservation context and page table support Pasha Tatashin
2026-09-20 19:36 ` [RFC PATCH 21/46] selftests: liveupdate: Add physical CPU preservation unit tests Pasha Tatashin
2026-09-20 19:36 ` [RFC PATCH 22/46] selftests: liveupdate: Add physical CPU preservation live update tests Pasha Tatashin
2026-09-20 19:36 ` [RFC PATCH 23/46] Documentation: liveupdate: Add physical CPU preservation documentation Pasha Tatashin
2026-09-20 19:36 ` [RFC PATCH 24/46] MAINTAINERS: Add entry for KVM Caretaker Pasha Tatashin
2026-09-20 19:36 ` [RFC PATCH 25/46] arm64: liveupdate: Add support for physical CPU preservation Pasha Tatashin
2026-09-20 19:36 ` [RFC PATCH 26/46] oncore: Add on-core KHO ABI and public framework headers Pasha Tatashin
2026-09-20 19:36 ` [RFC PATCH 27/46] oncore: Implement on-core session lifecycle and scheduling loop Pasha Tatashin
2026-09-20 19:36 ` [RFC PATCH 28/46] KVM: caretaker: Add Caretaker control block and architecture ops headers Pasha Tatashin
2026-09-20 19:36 ` [RFC PATCH 29/46] KVM: caretaker: Implement Caretaker session memory mapping helpers Pasha Tatashin
2026-09-20 19:36 ` [RFC PATCH 30/46] KVM: caretaker: Integrate Caretaker vCPU detach, attach, and cancel with KVM Pasha Tatashin
2026-09-20 19:36 ` [RFC PATCH 31/46] KVM: caretaker: Add generic KHO ABI telemetry and debugfs reporting Pasha Tatashin
2026-09-20 19:36 ` [RFC PATCH 32/46] KVM: x86: Add TDP MMU KHO preservation helpers Pasha Tatashin
2026-09-20 19:36 ` [RFC PATCH 33/46] KVM: x86: Add Caretaker x86 KHO ABI and runtime context headers Pasha Tatashin
2026-09-20 19:36 ` [RFC PATCH 34/46] KVM: x86: Implement Caretaker LAPIC timer and interrupt injection Pasha Tatashin
2026-09-20 19:36 ` [RFC PATCH 35/46] KVM: x86: Implement Caretaker VM-exit dispatch and instruction decoders Pasha Tatashin
2026-09-20 19:36 ` [RFC PATCH 36/46] KVM: x86: Implement Caretaker run loop and LUO detach/attach lifecycle Pasha Tatashin
2026-09-20 19:36 ` [RFC PATCH 37/46] KVM: VMX: Add Caretaker VMX assembly guest entry/exit routine and helpers Pasha Tatashin
2026-09-20 19:36 ` [RFC PATCH 38/46] KVM: VMX: Implement Caretaker VMX VMCS lifecycle and exit dispatch Pasha Tatashin
2026-09-20 19:36 ` [RFC PATCH 39/46] KVM: VMX: Integrate Caretaker VMX detach serialization and KVM registration Pasha Tatashin
2026-09-21 7:42 ` [RFC PATCH 00/46] Orphaned Virtual Machines Graf (AWS), Alexander
2026-09-21 21:00 ` [RFC PATCH 39/46] KVM: VMX: Integrate Caretaker VMX detach serialization and KVM registration Pasha Tatashin
2026-09-21 21:00 ` [RFC PATCH 40/46] KVM: SVM: Add Caretaker SVM assembly guest entry/exit routine Pasha Tatashin
2026-09-21 21:00 ` [RFC PATCH 41/46] KVM: SVM: Implement Caretaker SVM VMCB lifecycle and exit dispatch Pasha Tatashin
2026-09-21 21:00 ` [RFC PATCH 42/46] KVM: arm64: Add Caretaker arm64 KHO ABI and runtime context headers Pasha Tatashin
2026-09-21 21:00 ` [RFC PATCH 43/46] KVM: arm64: Add Caretaker EL2 exception vectors and guest entry/exit assembly Pasha Tatashin
2026-09-21 21:00 ` [RFC PATCH 44/46] KVM: arm64: Implement Caretaker GICv3 CPU interface and arch timer emulation Pasha Tatashin
2026-09-21 21:00 ` [RFC PATCH 45/46] KVM: arm64: Implement Caretaker system register trap and exception handlers Pasha Tatashin
2026-09-21 21:00 ` [RFC PATCH 46/46] KVM: arm64: Implement Caretaker vCPU run loop and LUO detach/attach lifecycle Pasha Tatashin
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