diff options
| author | Marc Zyngier <maz@kernel.org> | 2020-06-05 14:08:13 +0100 |
|---|---|---|
| committer | Marc Zyngier <maz@kernel.org> | 2020-06-09 10:59:52 +0100 |
| commit | 07da1ffaa1373f99331712faa67a00b5b807dfe8 (patch) | |
| tree | c3c5e732314aabf8e6e3a33abdcd05fe99048cd6 /arch/arm64/kvm/arm.c | |
| parent | b990d37fdf6781fd0907ffd14d0dff16b5d58ffa (diff) | |
| download | linux-07da1ffaa1373f99331712faa67a00b5b807dfe8.tar.gz linux-07da1ffaa1373f99331712faa67a00b5b807dfe8.tar.bz2 linux-07da1ffaa1373f99331712faa67a00b5b807dfe8.zip | |
KVM: arm64: Remove host_cpu_context member from vcpu structure
For very long, we have kept this pointer back to the per-cpu
host state, despite having working per-cpu accessors at EL2
for some time now.
Recent investigations have shown that this pointer is easy
to abuse in preemptible context, which is a sure sign that
it would better be gone. Not to mention that a per-cpu
pointer is faster to access at all times.
Reported-by: Andrew Scull <ascull@google.com>
Acked-by: Mark Rutland <mark.rutland@arm.com
Reviewed-by: Andrew Scull <ascull@google.com>
Signed-off-by: Marc Zyngier <maz@kernel.org>
Diffstat (limited to 'arch/arm64/kvm/arm.c')
| -rw-r--r-- | arch/arm64/kvm/arm.c | 3 |
1 files changed, 0 insertions, 3 deletions
diff --git a/arch/arm64/kvm/arm.c b/arch/arm64/kvm/arm.c index 14b747266607..6ddaa23ef346 100644 --- a/arch/arm64/kvm/arm.c +++ b/arch/arm64/kvm/arm.c @@ -340,10 +340,8 @@ void kvm_arch_vcpu_unblocking(struct kvm_vcpu *vcpu) void kvm_arch_vcpu_load(struct kvm_vcpu *vcpu, int cpu) { int *last_ran; - kvm_host_data_t *cpu_data; last_ran = this_cpu_ptr(vcpu->kvm->arch.last_vcpu_ran); - cpu_data = this_cpu_ptr(&kvm_host_data); /* * We might get preempted before the vCPU actually runs, but @@ -355,7 +353,6 @@ void kvm_arch_vcpu_load(struct kvm_vcpu *vcpu, int cpu) } vcpu->cpu = cpu; - vcpu->arch.host_cpu_context = &cpu_data->host_ctxt; kvm_vgic_load(vcpu); kvm_timer_vcpu_load(vcpu); |