diff options
| author | Zhenzhong Duan <zhenzhong.duan@oracle.com> | 2019-10-23 19:16:20 +0800 |
|---|---|---|
| committer | Paolo Bonzini <pbonzini@redhat.com> | 2020-07-08 16:21:56 -0400 |
| commit | de585020daf4e28a308549ed1457a51b3cc5ac92 (patch) | |
| tree | 3de3e81639560e298f717473a27071f21a979628 | |
| parent | e47c4aee5bde03e7018f4fde45ba21028a8f8438 (diff) | |
Revert "KVM: X86: Fix setup the virt_spin_lock_key before static key get initialized"
This reverts commit 34226b6b70980a8f81fff3c09a2c889f77edeeff.
Commit 8990cac6e5ea ("x86/jump_label: Initialize static branching
early") adds jump_label_init() call in setup_arch() to make static
keys initialized early, so we could use the original simpler code
again.
The similar change for XEN is in commit 090d54bcbc54 ("Revert
"x86/paravirt: Set up the virt_spin_lock_key after static keys get
initialized"")
Signed-off-by: Zhenzhong Duan <zhenzhong.duan@oracle.com>
Reviewed-by: Vitaly Kuznetsov <vkuznets@redhat.com>
Cc: Paolo Bonzini <pbonzini@redhat.com>
Cc: Radim Krcmar <rkrcmar@redhat.com>
Cc: Sean Christopherson <sean.j.christopherson@intel.com>
Cc: Vitaly Kuznetsov <vkuznets@redhat.com>
Cc: Wanpeng Li <wanpengli@tencent.com>
Cc: Jim Mattson <jmattson@google.com>
Cc: Joerg Roedel <joro@8bytes.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Borislav Petkov <bp@alien8.de>
Cc: "H. Peter Anvin" <hpa@zytor.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
| -rw-r--r-- | arch/x86/kernel/kvm.c | 12 |
1 files changed, 3 insertions, 9 deletions
diff --git a/arch/x86/kernel/kvm.c b/arch/x86/kernel/kvm.c index 681bc4090e91..e4208ce11689 100644 --- a/arch/x86/kernel/kvm.c +++ b/arch/x86/kernel/kvm.c @@ -570,13 +570,6 @@ static void kvm_smp_send_call_func_ipi(const struct cpumask *mask) } } -static void __init kvm_smp_prepare_cpus(unsigned int max_cpus) -{ - native_smp_prepare_cpus(max_cpus); - if (kvm_para_has_hint(KVM_HINTS_REALTIME)) - static_branch_disable(&virt_spin_lock_key); -} - static void __init kvm_smp_prepare_boot_cpu(void) { /* @@ -671,7 +664,6 @@ static void __init kvm_guest_init(void) } #ifdef CONFIG_SMP - smp_ops.smp_prepare_cpus = kvm_smp_prepare_cpus; smp_ops.smp_prepare_boot_cpu = kvm_smp_prepare_boot_cpu; if (pv_sched_yield_supported()) { smp_ops.send_call_func_ipi = kvm_smp_send_call_func_ipi; @@ -879,8 +871,10 @@ void __init kvm_spinlock_init(void) if (!kvm_para_has_feature(KVM_FEATURE_PV_UNHALT)) return; - if (kvm_para_has_hint(KVM_HINTS_REALTIME)) + if (kvm_para_has_hint(KVM_HINTS_REALTIME)) { + static_branch_disable(&virt_spin_lock_key); return; + } /* Don't use the pvqspinlock code if there is only 1 vCPU. */ if (num_possible_cpus() == 1) |