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| author | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2018-04-30 15:05:54 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2018-04-30 15:05:54 +0300 |
| commit | 720d690e3680d8ae5fcf86f8614c1a10b4ee7605 (patch) | |
| tree | 02158973d51022d7374f5b6e2f1953b530127f43 /virt/kvm/arm/arm.c | |
| parent | 72b6500c1cc68b949faa1bac76359dc601b482d6 (diff) | |
| parent | 6da6c0db5316275015e8cc2959f12a17584aeb64 (diff) | |
| download | linux-720d690e3680d8ae5fcf86f8614c1a10b4ee7605.tar.xz | |
Merge 4.17-rc3 into char-misc-next
We want the fixes in here as well.
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'virt/kvm/arm/arm.c')
| -rw-r--r-- | virt/kvm/arm/arm.c | 15 |
1 files changed, 10 insertions, 5 deletions
diff --git a/virt/kvm/arm/arm.c b/virt/kvm/arm/arm.c index dba629c5f8ac..a4c1b76240df 100644 --- a/virt/kvm/arm/arm.c +++ b/virt/kvm/arm/arm.c @@ -63,7 +63,7 @@ static DEFINE_PER_CPU(struct kvm_vcpu *, kvm_arm_running_vcpu); static atomic64_t kvm_vmid_gen = ATOMIC64_INIT(1); static u32 kvm_next_vmid; static unsigned int kvm_vmid_bits __read_mostly; -static DEFINE_SPINLOCK(kvm_vmid_lock); +static DEFINE_RWLOCK(kvm_vmid_lock); static bool vgic_present; @@ -473,11 +473,16 @@ static void update_vttbr(struct kvm *kvm) { phys_addr_t pgd_phys; u64 vmid; + bool new_gen; - if (!need_new_vmid_gen(kvm)) + read_lock(&kvm_vmid_lock); + new_gen = need_new_vmid_gen(kvm); + read_unlock(&kvm_vmid_lock); + + if (!new_gen) return; - spin_lock(&kvm_vmid_lock); + write_lock(&kvm_vmid_lock); /* * We need to re-check the vmid_gen here to ensure that if another vcpu @@ -485,7 +490,7 @@ static void update_vttbr(struct kvm *kvm) * use the same vmid. */ if (!need_new_vmid_gen(kvm)) { - spin_unlock(&kvm_vmid_lock); + write_unlock(&kvm_vmid_lock); return; } @@ -519,7 +524,7 @@ static void update_vttbr(struct kvm *kvm) vmid = ((u64)(kvm->arch.vmid) << VTTBR_VMID_SHIFT) & VTTBR_VMID_MASK(kvm_vmid_bits); kvm->arch.vttbr = kvm_phys_to_vttbr(pgd_phys) | vmid; - spin_unlock(&kvm_vmid_lock); + write_unlock(&kvm_vmid_lock); } static int kvm_vcpu_first_run_init(struct kvm_vcpu *vcpu) |