| Message ID | 20230930001933.2660-11-salil.mehta@huawei.com (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
| Series | Add architecture agnostic code to support vCPU Hotplug | expand |
On 9/30/23 10:19, Salil Mehta wrote: > From: Jean-Philippe Brucker <jean-philippe@linaro.org> > > When a KVM vCPU is reset following a PSCI CPU_ON call, its power state > is not synchronized with KVM at the moment. Because the vCPU is not > marked dirty, we miss the call to kvm_arch_put_registers() that writes > to KVM's MP_STATE. Force mp_state synchronization. > > Signed-off-by: Jean-Philippe Brucker <jean-philippe@linaro.org> > Signed-off-by: Salil Mehta <salil.mehta@huawei.com> > Reviewed-by: Alex Bennée <alex.bennee@linaro.org> > --- > target/arm/kvm.c | 8 +++++++- > 1 file changed, 7 insertions(+), 1 deletion(-) > Reviewed-by: Gavin Shan <gshan@redhat.com>
diff --git a/target/arm/kvm.c b/target/arm/kvm.c index b66b936a95..8cb70b9e7c 100644 --- a/target/arm/kvm.c +++ b/target/arm/kvm.c @@ -642,11 +642,12 @@ void kvm_arm_cpu_post_load(ARMCPU *cpu) void kvm_arm_reset_vcpu(ARMCPU *cpu) { int ret; + CPUState *cs = CPU(cpu); /* Re-init VCPU so that all registers are set to * their respective reset values. */ - ret = kvm_arm_vcpu_init(CPU(cpu)); + ret = kvm_arm_vcpu_init(cs); if (ret < 0) { fprintf(stderr, "kvm_arm_vcpu_init failed: %s\n", strerror(-ret)); abort(); @@ -663,6 +664,11 @@ void kvm_arm_reset_vcpu(ARMCPU *cpu) * for the same reason we do so in kvm_arch_get_registers(). */ write_list_to_cpustate(cpu); + /* + * Ensure we call kvm_arch_put_registers(). The vCPU isn't marked dirty if + * it was parked in KVM and is now booting from a PSCI CPU_ON call. + */ + cs->vcpu_dirty = true; } /*