Merging upstream version 6.7.7.

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 93 insertions, 0 deletions

diff --git a/arch/loongarch/include/asm/kvm_vcpu.h b/arch/loongarch/include/asm/kvm_vcpu.h
new file mode 100644
index 0000000000..553cfa2b2b
--- /dev/null
+++ b/arch/loongarch/include/asm/kvm_vcpu.h
@@ -0,0 +1,93 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+/*
+ * Copyright (C) 2020-2023 Loongson Technology Corporation Limited
+ */
+
+#ifndef __ASM_LOONGARCH_KVM_VCPU_H__
+#define __ASM_LOONGARCH_KVM_VCPU_H__
+
+#include <linux/kvm_host.h>
+#include <asm/loongarch.h>
+
+/* Controlled by 0x5 guest estat */
+#define CPU_SIP0			(_ULCAST_(1))
+#define CPU_SIP1			(_ULCAST_(1) << 1)
+#define CPU_PMU				(_ULCAST_(1) << 10)
+#define CPU_TIMER			(_ULCAST_(1) << 11)
+#define CPU_IPI				(_ULCAST_(1) << 12)
+
+/* Controlled by 0x52 guest exception VIP aligned to estat bit 5~12 */
+#define CPU_IP0				(_ULCAST_(1))
+#define CPU_IP1				(_ULCAST_(1) << 1)
+#define CPU_IP2				(_ULCAST_(1) << 2)
+#define CPU_IP3				(_ULCAST_(1) << 3)
+#define CPU_IP4				(_ULCAST_(1) << 4)
+#define CPU_IP5				(_ULCAST_(1) << 5)
+#define CPU_IP6				(_ULCAST_(1) << 6)
+#define CPU_IP7				(_ULCAST_(1) << 7)
+
+#define MNSEC_PER_SEC			(NSEC_PER_SEC >> 20)
+
+/* KVM_IRQ_LINE irq field index values */
+#define KVM_LOONGSON_IRQ_TYPE_SHIFT	24
+#define KVM_LOONGSON_IRQ_TYPE_MASK	0xff
+#define KVM_LOONGSON_IRQ_VCPU_SHIFT	16
+#define KVM_LOONGSON_IRQ_VCPU_MASK	0xff
+#define KVM_LOONGSON_IRQ_NUM_SHIFT	0
+#define KVM_LOONGSON_IRQ_NUM_MASK	0xffff
+
+typedef union loongarch_instruction  larch_inst;
+typedef int (*exit_handle_fn)(struct kvm_vcpu *);
+
+int  kvm_emu_mmio_read(struct kvm_vcpu *vcpu, larch_inst inst);
+int  kvm_emu_mmio_write(struct kvm_vcpu *vcpu, larch_inst inst);
+int  kvm_complete_mmio_read(struct kvm_vcpu *vcpu, struct kvm_run *run);
+int  kvm_complete_iocsr_read(struct kvm_vcpu *vcpu, struct kvm_run *run);
+int  kvm_emu_idle(struct kvm_vcpu *vcpu);
+int  kvm_pending_timer(struct kvm_vcpu *vcpu);
+int  kvm_handle_fault(struct kvm_vcpu *vcpu, int fault);
+void kvm_deliver_intr(struct kvm_vcpu *vcpu);
+void kvm_deliver_exception(struct kvm_vcpu *vcpu);
+
+void kvm_own_fpu(struct kvm_vcpu *vcpu);
+void kvm_lose_fpu(struct kvm_vcpu *vcpu);
+void kvm_save_fpu(struct loongarch_fpu *fpu);
+void kvm_restore_fpu(struct loongarch_fpu *fpu);
+void kvm_restore_fcsr(struct loongarch_fpu *fpu);
+
+void kvm_acquire_timer(struct kvm_vcpu *vcpu);
+void kvm_init_timer(struct kvm_vcpu *vcpu, unsigned long hz);
+void kvm_reset_timer(struct kvm_vcpu *vcpu);
+void kvm_save_timer(struct kvm_vcpu *vcpu);
+void kvm_restore_timer(struct kvm_vcpu *vcpu);
+
+int kvm_vcpu_ioctl_interrupt(struct kvm_vcpu *vcpu, struct kvm_interrupt *irq);
+
+/*
+ * Loongarch KVM guest interrupt handling
+ */
+static inline void kvm_queue_irq(struct kvm_vcpu *vcpu, unsigned int irq)
+{
+	set_bit(irq, &vcpu->arch.irq_pending);
+	clear_bit(irq, &vcpu->arch.irq_clear);
+}
+
+static inline void kvm_dequeue_irq(struct kvm_vcpu *vcpu, unsigned int irq)
+{
+	clear_bit(irq, &vcpu->arch.irq_pending);
+	set_bit(irq, &vcpu->arch.irq_clear);
+}
+
+static inline int kvm_queue_exception(struct kvm_vcpu *vcpu,
+			unsigned int code, unsigned int subcode)
+{
+	/* only one exception can be injected */
+	if (!vcpu->arch.exception_pending) {
+		set_bit(code, &vcpu->arch.exception_pending);
+		vcpu->arch.esubcode = subcode;
+		return 0;
+	} else
+		return -1;
+}
+
+#endif /* __ASM_LOONGARCH_KVM_VCPU_H__ */