Implement some misc vcpu relaterd interfaces, such as vcpu runnable,
vcpu should kick, vcpu dump regs, etc.
Signed-off-by: Tianrui Zhao <zhaotianrui@xxxxxxxxxxx>
---
arch/loongarch/kvm/vcpu.c | 112 ++++++++++++++++++++++++++++++++++++++
1 file changed, 112 insertions(+)
diff --git a/arch/loongarch/kvm/vcpu.c b/arch/loongarch/kvm/vcpu.c
index a60ac6576..cf33ae2ba 100644
--- a/arch/loongarch/kvm/vcpu.c
+++ b/arch/loongarch/kvm/vcpu.c
@@ -13,6 +13,118 @@
#define CREATE_TRACE_POINTS
#include "trace.h"
+int kvm_arch_vcpu_runnable(struct kvm_vcpu *vcpu)
+{
+ return !!(vcpu->arch.irq_pending);
+}
+
+int kvm_arch_vcpu_should_kick(struct kvm_vcpu *vcpu)
+{
+ return kvm_vcpu_exiting_guest_mode(vcpu) == IN_GUEST_MODE;
+}
+
+bool kvm_arch_vcpu_in_kernel(struct kvm_vcpu *vcpu)
+{
+ return false;
+}
+
+vm_fault_t kvm_arch_vcpu_fault(struct kvm_vcpu *vcpu, struct vm_fault *vmf)
+{
+ return VM_FAULT_SIGBUS;
+}
+
+int kvm_arch_vcpu_ioctl_translate(struct kvm_vcpu *vcpu,
+ struct kvm_translation *tr)
+{
+ return 0;
+}
+
+int kvm_cpu_has_pending_timer(struct kvm_vcpu *vcpu)
+{
+ return _kvm_pending_timer(vcpu) ||
+ kvm_read_hw_gcsr(LOONGARCH_CSR_ESTAT) &
+ (1 << (EXCCODE_TIMER - EXCCODE_INT_START));
+}
+
+int kvm_arch_vcpu_dump_regs(struct kvm_vcpu *vcpu)
+{
+ int i;
+
+ if (!vcpu)
+ return -1;
+
+ kvm_debug("VCPU Register Dump:\n");
+ kvm_debug("\tpc = 0x%08lx\n", vcpu->arch.pc);
+ kvm_debug("\texceptions: %08lx\n", vcpu->arch.irq_pending);
+
+ for (i = 0; i < 32; i += 4) {
+ kvm_debug("\tgpr%02d: %08lx %08lx %08lx %08lx\n", i,
+ vcpu->arch.gprs[i],
+ vcpu->arch.gprs[i + 1],
+ vcpu->arch.gprs[i + 2], vcpu->arch.gprs[i + 3]);
+ }
+
+ kvm_debug("\tCRMOD: 0x%08llx, exst: 0x%08llx\n",
+ kvm_read_hw_gcsr(LOONGARCH_CSR_CRMD),
+ kvm_read_hw_gcsr(LOONGARCH_CSR_ESTAT));
+
+ kvm_debug("\tERA: 0x%08llx\n", kvm_read_hw_gcsr(LOONGARCH_CSR_ERA));
+
+ return 0;
+}
+
+int kvm_arch_vcpu_ioctl_get_mpstate(struct kvm_vcpu *vcpu,
+ struct kvm_mp_state *mp_state)
+{
+ return -ENOIOCTLCMD;
+}
+
+int kvm_arch_vcpu_ioctl_set_mpstate(struct kvm_vcpu *vcpu,
+ struct kvm_mp_state *mp_state)
+{
+ return -ENOIOCTLCMD;
+}
+
+int kvm_arch_vcpu_ioctl_set_guest_debug(struct kvm_vcpu *vcpu,
+ struct kvm_guest_debug *dbg)
+{
+ return -EINVAL;
+}
+
+static int lvcpu_stat_get(void *address, u64 *val)
+{
+ *val = *(u64 *)address;
+ return 0;
+}
+DEFINE_SIMPLE_ATTRIBUTE(lvcpu_stat_fops, lvcpu_stat_get, NULL, "%llu\n");
+
+static int vcpu_pid_get(void *arg, u64 *val)
+{
+ struct kvm_vcpu *vcpu = (struct kvm_vcpu *)arg;
+
+ if (vcpu)
+ *val = pid_vnr(vcpu->pid);
+ return 0;
+}
+DEFINE_SIMPLE_ATTRIBUTE(vcpu_pid_fops, vcpu_pid_get, NULL, "%llu\n");
+
+/**
+ * kvm_migrate_count() - Migrate timer.
+ * @vcpu: Virtual CPU.
+ *
+ * Migrate hrtimer to the current CPU by cancelling and restarting it
+ * if it was running prior to being cancelled.
+ *
+ * Must be called when the VCPU is migrated to a different CPU to ensure that
+ * timer expiry during guest execution interrupts the guest and causes the
+ * interrupt to be delivered in a timely manner.
+ */
+static void kvm_migrate_count(struct kvm_vcpu *vcpu)
+{
+ if (hrtimer_cancel(&vcpu->arch.swtimer))
+ hrtimer_restart(&vcpu->arch.swtimer);
+}
+
int _kvm_getcsr(struct kvm_vcpu *vcpu, unsigned int id, u64 *v, int force)
{
struct loongarch_csrs *csr = vcpu->arch.csr;
--
2.31.1
