Commit de585020 authored by Zhenzhong Duan's avatar Zhenzhong Duan Committed by Paolo Bonzini

Revert "KVM: X86: Fix setup the virt_spin_lock_key before static key get initialized"

This reverts commit 34226b6b.

Commit 8990cac6 ("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 090d54bc ("Revert
"x86/paravirt: Set up the virt_spin_lock_key after static keys get
initialized"")
Signed-off-by: default avatarZhenzhong Duan <zhenzhong.duan@oracle.com>
Reviewed-by: default avatarVitaly 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: default avatarPaolo Bonzini <pbonzini@redhat.com>
parent e47c4aee
......@@ -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)
......
Markdown is supported
0%
or
You are about to add 0 people to the discussion. Proceed with caution.
Finish editing this message first!
Please register or to comment