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// SPDX-License-Identifier: GPL-2.0
#include <linux/kvm_host.h>
#include <linux/fpu.h>
#include <arm64/kvm_emulate.h>
#include <arm64/kvm_nested.h>
bool kvm_arm_vcpu_is_finalized(struct kvm_vcpu *vcpu)
{
return true;
}
static inline void vcpu_reset_hcr(struct kvm_vcpu *vcpu)
{
vcpu->arch.hcr_el2 = HCR_EL2_E2H | HCR_EL2_RW | HCR_EL2_AMO |
HCR_EL2_IMO | HCR_EL2_FMO | HCR_EL2_PTW;
/* traps */
vcpu->arch.hcr_el2 |= HCR_EL2_TSC | HCR_EL2_TID1 | HCR_EL2_TID2 |
HCR_EL2_TID3 | HCR_EL2_TID4 | HCR_EL2_TID5 |
HCR_EL2_TIDCP | HCR_EL2_TLOR;
}
void kvm_reset_vcpu(struct kvm_vcpu *vcpu)
{
struct vcpu_reset_state reset_state;
bool loaded;
scoped_guard(spinlock, &vcpu->arch.mp_state_lock) {
reset_state = vcpu->arch.reset_state;
vcpu->arch.reset_state.reset = false;
}
/*
* Disable preemption around the vcpu reset as we might otherwise race with
* preempt notifiers which call stiasrm/lasrm from put/load
*/
preempt_disable();
/* The reset must run with an unloaded save area */
loaded = vcpu_is_loaded(vcpu);
if (loaded)
vcpu_put(vcpu);
kvm_reset_vcpu_core(vcpu);
/* Reset special registers */
vcpu_reset_hcr(vcpu);
if (reset_state.reset) {
*vcpu_pc(vcpu) = reset_state.pc;
vcpu_clear_flag(vcpu, PENDING_EXCEPTION);
vcpu_clear_flag(vcpu, EXCEPT_MASK);
vcpu_clear_flag(vcpu, INCREMENT_PC);
vcpu_set_reg(vcpu, 0, reset_state.r0);
}
/* Load new vx-regs into HW if they are currently loaded */
if (current->thread.kfpu_flags)
load_vx_regs(vcpu->arch.ctxt.vregs);
if (loaded)
vcpu_load(vcpu);
preempt_enable();
}
int kvm_arm_vcpu_finalize(struct kvm_vcpu *vcpu, int feature)
{
return -EINVAL;
}
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