LoongArch: KVM: Add vcpu related header files

Add LoongArch vcpu related header files, including vcpu csr information,
irq number definitions, and some vcpu interfaces.
Reviewed-by: Bibo Mao <maobibo@loongson.cn>
Tested-by: Huacai Chen <chenhuacai@loongson.cn>
Signed-off-by: Tianrui Zhao <zhaotianrui@loongson.cn>
Signed-off-by: Huacai Chen <chenhuacai@loongson.cn>

arch/loongarch/include/asm/kvm_csr.h

+/* SPDX-License-Identifier: GPL-2.0 */
+/*
+ * Copyright (C) 2020-2023 Loongson Technology Corporation Limited
+ */
+
+#ifndef __ASM_LOONGARCH_KVM_CSR_H__
+#define __ASM_LOONGARCH_KVM_CSR_H__
+
+#include <linux/uaccess.h>
+#include <linux/kvm_host.h>
+#include <asm/loongarch.h>
+#include <asm/kvm_vcpu.h>
+
+#define gcsr_read(csr)						\
+({								\
+	register unsigned long __v;				\
+	__asm__ __volatile__(					\
+		" gcsrrd %[val], %[reg]\n\t"			\
+		: [val] "=r" (__v)				\
+		: [reg] "i" (csr)				\
+		: "memory");					\
+	__v;							\
+})
+
+#define gcsr_write(v, csr)					\
+({								\
+	register unsigned long __v = v;				\
+	__asm__ __volatile__ (					\
+		" gcsrwr %[val], %[reg]\n\t"			\
+		: [val] "+r" (__v)				\
+		: [reg] "i" (csr)				\
+		: "memory");					\
+})
+
+#define gcsr_xchg(v, m, csr)					\
+({								\
+	register unsigned long __v = v;				\
+	__asm__ __volatile__(					\
+		" gcsrxchg %[val], %[mask], %[reg]\n\t"		\
+		: [val] "+r" (__v)				\
+		: [mask] "r" (m), [reg] "i" (csr)		\
+		: "memory");					\
+	__v;							\
+})
+
+/* Guest CSRS read and write */
+#define read_gcsr_crmd()		gcsr_read(LOONGARCH_CSR_CRMD)
+#define write_gcsr_crmd(val)		gcsr_write(val, LOONGARCH_CSR_CRMD)
+#define read_gcsr_prmd()		gcsr_read(LOONGARCH_CSR_PRMD)
+#define write_gcsr_prmd(val)		gcsr_write(val, LOONGARCH_CSR_PRMD)
+#define read_gcsr_euen()		gcsr_read(LOONGARCH_CSR_EUEN)
+#define write_gcsr_euen(val)		gcsr_write(val, LOONGARCH_CSR_EUEN)
+#define read_gcsr_misc()		gcsr_read(LOONGARCH_CSR_MISC)
+#define write_gcsr_misc(val)		gcsr_write(val, LOONGARCH_CSR_MISC)
+#define read_gcsr_ecfg()		gcsr_read(LOONGARCH_CSR_ECFG)
+#define write_gcsr_ecfg(val)		gcsr_write(val, LOONGARCH_CSR_ECFG)
+#define read_gcsr_estat()		gcsr_read(LOONGARCH_CSR_ESTAT)
+#define write_gcsr_estat(val)		gcsr_write(val, LOONGARCH_CSR_ESTAT)
+#define read_gcsr_era()			gcsr_read(LOONGARCH_CSR_ERA)
+#define write_gcsr_era(val)		gcsr_write(val, LOONGARCH_CSR_ERA)
+#define read_gcsr_badv()		gcsr_read(LOONGARCH_CSR_BADV)
+#define write_gcsr_badv(val)		gcsr_write(val, LOONGARCH_CSR_BADV)
+#define read_gcsr_badi()		gcsr_read(LOONGARCH_CSR_BADI)
+#define write_gcsr_badi(val)		gcsr_write(val, LOONGARCH_CSR_BADI)
+#define read_gcsr_eentry()		gcsr_read(LOONGARCH_CSR_EENTRY)
+#define write_gcsr_eentry(val)		gcsr_write(val, LOONGARCH_CSR_EENTRY)
+
+#define read_gcsr_asid()		gcsr_read(LOONGARCH_CSR_ASID)
+#define write_gcsr_asid(val)		gcsr_write(val, LOONGARCH_CSR_ASID)
+#define read_gcsr_pgdl()		gcsr_read(LOONGARCH_CSR_PGDL)
+#define write_gcsr_pgdl(val)		gcsr_write(val, LOONGARCH_CSR_PGDL)
+#define read_gcsr_pgdh()		gcsr_read(LOONGARCH_CSR_PGDH)
+#define write_gcsr_pgdh(val)		gcsr_write(val, LOONGARCH_CSR_PGDH)
+#define write_gcsr_pgd(val)		gcsr_write(val, LOONGARCH_CSR_PGD)
+#define read_gcsr_pgd()			gcsr_read(LOONGARCH_CSR_PGD)
+#define read_gcsr_pwctl0()		gcsr_read(LOONGARCH_CSR_PWCTL0)
+#define write_gcsr_pwctl0(val)		gcsr_write(val, LOONGARCH_CSR_PWCTL0)
+#define read_gcsr_pwctl1()		gcsr_read(LOONGARCH_CSR_PWCTL1)
+#define write_gcsr_pwctl1(val)		gcsr_write(val, LOONGARCH_CSR_PWCTL1)
+#define read_gcsr_stlbpgsize()		gcsr_read(LOONGARCH_CSR_STLBPGSIZE)
+#define write_gcsr_stlbpgsize(val)	gcsr_write(val, LOONGARCH_CSR_STLBPGSIZE)
+#define read_gcsr_rvacfg()		gcsr_read(LOONGARCH_CSR_RVACFG)
+#define write_gcsr_rvacfg(val)		gcsr_write(val, LOONGARCH_CSR_RVACFG)
+
+#define read_gcsr_cpuid()		gcsr_read(LOONGARCH_CSR_CPUID)
+#define write_gcsr_cpuid(val)		gcsr_write(val, LOONGARCH_CSR_CPUID)
+#define read_gcsr_prcfg1()		gcsr_read(LOONGARCH_CSR_PRCFG1)
+#define write_gcsr_prcfg1(val)		gcsr_write(val, LOONGARCH_CSR_PRCFG1)
+#define read_gcsr_prcfg2()		gcsr_read(LOONGARCH_CSR_PRCFG2)
+#define write_gcsr_prcfg2(val)		gcsr_write(val, LOONGARCH_CSR_PRCFG2)
+#define read_gcsr_prcfg3()		gcsr_read(LOONGARCH_CSR_PRCFG3)
+#define write_gcsr_prcfg3(val)		gcsr_write(val, LOONGARCH_CSR_PRCFG3)
+
+#define read_gcsr_kscratch0()		gcsr_read(LOONGARCH_CSR_KS0)
+#define write_gcsr_kscratch0(val)	gcsr_write(val, LOONGARCH_CSR_KS0)
+#define read_gcsr_kscratch1()		gcsr_read(LOONGARCH_CSR_KS1)
+#define write_gcsr_kscratch1(val)	gcsr_write(val, LOONGARCH_CSR_KS1)
+#define read_gcsr_kscratch2()		gcsr_read(LOONGARCH_CSR_KS2)
+#define write_gcsr_kscratch2(val)	gcsr_write(val, LOONGARCH_CSR_KS2)
+#define read_gcsr_kscratch3()		gcsr_read(LOONGARCH_CSR_KS3)
+#define write_gcsr_kscratch3(val)	gcsr_write(val, LOONGARCH_CSR_KS3)
+#define read_gcsr_kscratch4()		gcsr_read(LOONGARCH_CSR_KS4)
+#define write_gcsr_kscratch4(val)	gcsr_write(val, LOONGARCH_CSR_KS4)
+#define read_gcsr_kscratch5()		gcsr_read(LOONGARCH_CSR_KS5)
+#define write_gcsr_kscratch5(val)	gcsr_write(val, LOONGARCH_CSR_KS5)
+#define read_gcsr_kscratch6()		gcsr_read(LOONGARCH_CSR_KS6)
+#define write_gcsr_kscratch6(val)	gcsr_write(val, LOONGARCH_CSR_KS6)
+#define read_gcsr_kscratch7()		gcsr_read(LOONGARCH_CSR_KS7)
+#define write_gcsr_kscratch7(val)	gcsr_write(val, LOONGARCH_CSR_KS7)
+
+#define read_gcsr_timerid()		gcsr_read(LOONGARCH_CSR_TMID)
+#define write_gcsr_timerid(val)		gcsr_write(val, LOONGARCH_CSR_TMID)
+#define read_gcsr_timercfg()		gcsr_read(LOONGARCH_CSR_TCFG)
+#define write_gcsr_timercfg(val)	gcsr_write(val, LOONGARCH_CSR_TCFG)
+#define read_gcsr_timertick()		gcsr_read(LOONGARCH_CSR_TVAL)
+#define write_gcsr_timertick(val)	gcsr_write(val, LOONGARCH_CSR_TVAL)
+#define read_gcsr_timeroffset()		gcsr_read(LOONGARCH_CSR_CNTC)
+#define write_gcsr_timeroffset(val)	gcsr_write(val, LOONGARCH_CSR_CNTC)
+
+#define read_gcsr_llbctl()		gcsr_read(LOONGARCH_CSR_LLBCTL)
+#define write_gcsr_llbctl(val)		gcsr_write(val, LOONGARCH_CSR_LLBCTL)
+
+#define read_gcsr_tlbidx()		gcsr_read(LOONGARCH_CSR_TLBIDX)
+#define write_gcsr_tlbidx(val)		gcsr_write(val, LOONGARCH_CSR_TLBIDX)
+#define read_gcsr_tlbrentry()		gcsr_read(LOONGARCH_CSR_TLBRENTRY)
+#define write_gcsr_tlbrentry(val)	gcsr_write(val, LOONGARCH_CSR_TLBRENTRY)
+#define read_gcsr_tlbrbadv()		gcsr_read(LOONGARCH_CSR_TLBRBADV)
+#define write_gcsr_tlbrbadv(val)	gcsr_write(val, LOONGARCH_CSR_TLBRBADV)
+#define read_gcsr_tlbrera()		gcsr_read(LOONGARCH_CSR_TLBRERA)
+#define write_gcsr_tlbrera(val)		gcsr_write(val, LOONGARCH_CSR_TLBRERA)
+#define read_gcsr_tlbrsave()		gcsr_read(LOONGARCH_CSR_TLBRSAVE)
+#define write_gcsr_tlbrsave(val)	gcsr_write(val, LOONGARCH_CSR_TLBRSAVE)
+#define read_gcsr_tlbrelo0()		gcsr_read(LOONGARCH_CSR_TLBRELO0)
+#define write_gcsr_tlbrelo0(val)	gcsr_write(val, LOONGARCH_CSR_TLBRELO0)
+#define read_gcsr_tlbrelo1()		gcsr_read(LOONGARCH_CSR_TLBRELO1)
+#define write_gcsr_tlbrelo1(val)	gcsr_write(val, LOONGARCH_CSR_TLBRELO1)
+#define read_gcsr_tlbrehi()		gcsr_read(LOONGARCH_CSR_TLBREHI)
+#define write_gcsr_tlbrehi(val)		gcsr_write(val, LOONGARCH_CSR_TLBREHI)
+#define read_gcsr_tlbrprmd()		gcsr_read(LOONGARCH_CSR_TLBRPRMD)
+#define write_gcsr_tlbrprmd(val)	gcsr_write(val, LOONGARCH_CSR_TLBRPRMD)
+
+#define read_gcsr_directwin0()		gcsr_read(LOONGARCH_CSR_DMWIN0)
+#define write_gcsr_directwin0(val)	gcsr_write(val, LOONGARCH_CSR_DMWIN0)
+#define read_gcsr_directwin1()		gcsr_read(LOONGARCH_CSR_DMWIN1)
+#define write_gcsr_directwin1(val)	gcsr_write(val, LOONGARCH_CSR_DMWIN1)
+#define read_gcsr_directwin2()		gcsr_read(LOONGARCH_CSR_DMWIN2)
+#define write_gcsr_directwin2(val)	gcsr_write(val, LOONGARCH_CSR_DMWIN2)
+#define read_gcsr_directwin3()		gcsr_read(LOONGARCH_CSR_DMWIN3)
+#define write_gcsr_directwin3(val)	gcsr_write(val, LOONGARCH_CSR_DMWIN3)
+
+/* Guest related CSRs */
+#define read_csr_gtlbc()		csr_read64(LOONGARCH_CSR_GTLBC)
+#define write_csr_gtlbc(val)		csr_write64(val, LOONGARCH_CSR_GTLBC)
+#define read_csr_trgp()			csr_read64(LOONGARCH_CSR_TRGP)
+#define read_csr_gcfg()			csr_read64(LOONGARCH_CSR_GCFG)
+#define write_csr_gcfg(val)		csr_write64(val, LOONGARCH_CSR_GCFG)
+#define read_csr_gstat()		csr_read64(LOONGARCH_CSR_GSTAT)
+#define write_csr_gstat(val)		csr_write64(val, LOONGARCH_CSR_GSTAT)
+#define read_csr_gintc()		csr_read64(LOONGARCH_CSR_GINTC)
+#define write_csr_gintc(val)		csr_write64(val, LOONGARCH_CSR_GINTC)
+#define read_csr_gcntc()		csr_read64(LOONGARCH_CSR_GCNTC)
+#define write_csr_gcntc(val)		csr_write64(val, LOONGARCH_CSR_GCNTC)
+
+#define __BUILD_GCSR_OP(name)		__BUILD_CSR_COMMON(gcsr_##name)
+
+__BUILD_CSR_OP(gcfg)
+__BUILD_CSR_OP(gstat)
+__BUILD_CSR_OP(gtlbc)
+__BUILD_CSR_OP(gintc)
+__BUILD_GCSR_OP(llbctl)
+__BUILD_GCSR_OP(tlbidx)
+
+#define set_gcsr_estat(val)	\
+	gcsr_xchg(val, val, LOONGARCH_CSR_ESTAT)
+#define clear_gcsr_estat(val)	\
+	gcsr_xchg(~(val), val, LOONGARCH_CSR_ESTAT)
+
+#define kvm_read_hw_gcsr(id)		gcsr_read(id)
+#define kvm_write_hw_gcsr(id, val)	gcsr_write(val, id)
+
+#define kvm_save_hw_gcsr(csr, gid)	(csr->csrs[gid] = gcsr_read(gid))
+#define kvm_restore_hw_gcsr(csr, gid)	(gcsr_write(csr->csrs[gid], gid))
+
+int kvm_emu_iocsr(larch_inst inst, struct kvm_run *run, struct kvm_vcpu *vcpu);
+
+static __always_inline unsigned long kvm_read_sw_gcsr(struct loongarch_csrs *csr, int gid)
+{
+	return csr->csrs[gid];
+}
+
+static __always_inline void kvm_write_sw_gcsr(struct loongarch_csrs *csr, int gid, unsigned long val)
+{
+	csr->csrs[gid] = val;
+}
+
+static __always_inline void kvm_set_sw_gcsr(struct loongarch_csrs *csr,
+					    int gid, unsigned long val)
+{
+	csr->csrs[gid] |= val;
+}
+
+static __always_inline void kvm_change_sw_gcsr(struct loongarch_csrs *csr,
+					       int gid, unsigned long mask, unsigned long val)
+{
+	unsigned long _mask = mask;
+
+	csr->csrs[gid] &= ~_mask;
+	csr->csrs[gid] |= val & _mask;
+}
+
+#endif	/* __ASM_LOONGARCH_KVM_CSR_H__ */

arch/loongarch/include/asm/kvm_vcpu.h

+/* 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__ */

arch/loongarch/include/asm/loongarch.h

@@ -226,6 +226,7 @@
 #define LOONGARCH_CSR_ECFG		0x4	/* Exception config */
 #define  CSR_ECFG_VS_SHIFT		16
 #define  CSR_ECFG_VS_WIDTH		3
+#define  CSR_ECFG_VS_SHIFT_END		(CSR_ECFG_VS_SHIFT + CSR_ECFG_VS_WIDTH - 1)
 #define  CSR_ECFG_VS			(_ULCAST_(0x7) << CSR_ECFG_VS_SHIFT)
 #define  CSR_ECFG_IM_SHIFT		0
 #define  CSR_ECFG_IM_WIDTH		14
@@ -314,13 +315,14 @@
 #define  CSR_TLBLO1_V			(_ULCAST_(0x1) << CSR_TLBLO1_V_SHIFT)
 
 #define LOONGARCH_CSR_GTLBC		0x15	/* Guest TLB control */
-#define  CSR_GTLBC_RID_SHIFT		16
-#define  CSR_GTLBC_RID_WIDTH		8
-#define  CSR_GTLBC_RID			(_ULCAST_(0xff) << CSR_GTLBC_RID_SHIFT)
+#define  CSR_GTLBC_TGID_SHIFT		16
+#define  CSR_GTLBC_TGID_WIDTH		8
+#define  CSR_GTLBC_TGID_SHIFT_END	(CSR_GTLBC_TGID_SHIFT + CSR_GTLBC_TGID_WIDTH - 1)
+#define  CSR_GTLBC_TGID			(_ULCAST_(0xff) << CSR_GTLBC_TGID_SHIFT)
 #define  CSR_GTLBC_TOTI_SHIFT		13
 #define  CSR_GTLBC_TOTI			(_ULCAST_(0x1) << CSR_GTLBC_TOTI_SHIFT)
-#define  CSR_GTLBC_USERID_SHIFT		12
-#define  CSR_GTLBC_USERID		(_ULCAST_(0x1) << CSR_GTLBC_USERID_SHIFT)
+#define  CSR_GTLBC_USETGID_SHIFT	12
+#define  CSR_GTLBC_USETGID		(_ULCAST_(0x1) << CSR_GTLBC_USETGID_SHIFT)
 #define  CSR_GTLBC_GMTLBSZ_SHIFT	0
 #define  CSR_GTLBC_GMTLBSZ_WIDTH	6
 #define  CSR_GTLBC_GMTLBSZ		(_ULCAST_(0x3f) << CSR_GTLBC_GMTLBSZ_SHIFT)
@@ -475,6 +477,7 @@
 #define LOONGARCH_CSR_GSTAT		0x50	/* Guest status */
 #define  CSR_GSTAT_GID_SHIFT		16
 #define  CSR_GSTAT_GID_WIDTH		8
+#define  CSR_GSTAT_GID_SHIFT_END	(CSR_GSTAT_GID_SHIFT + CSR_GSTAT_GID_WIDTH - 1)
 #define  CSR_GSTAT_GID			(_ULCAST_(0xff) << CSR_GSTAT_GID_SHIFT)
 #define  CSR_GSTAT_GIDBIT_SHIFT		4
 #define  CSR_GSTAT_GIDBIT_WIDTH		6
@@ -525,6 +528,12 @@
 #define  CSR_GCFG_MATC_GUEST		(_ULCAST_(0x0) << CSR_GCFG_MATC_SHITF)
 #define  CSR_GCFG_MATC_ROOT		(_ULCAST_(0x1) << CSR_GCFG_MATC_SHITF)
 #define  CSR_GCFG_MATC_NEST		(_ULCAST_(0x2) << CSR_GCFG_MATC_SHITF)
+#define  CSR_GCFG_MATP_NEST_SHIFT	2
+#define  CSR_GCFG_MATP_NEST		(_ULCAST_(0x1) << CSR_GCFG_MATP_NEST_SHIFT)
+#define  CSR_GCFG_MATP_ROOT_SHIFT	1
+#define  CSR_GCFG_MATP_ROOT		(_ULCAST_(0x1) << CSR_GCFG_MATP_ROOT_SHIFT)
+#define  CSR_GCFG_MATP_GUEST_SHIFT	0
+#define  CSR_GCFG_MATP_GUEST		(_ULCAST_(0x1) << CSR_GCFG_MATP_GUEST_SHIFT)
 
 #define LOONGARCH_CSR_GINTC		0x52	/* Guest interrupt control */
 #define  CSR_GINTC_HC_SHIFT		16

arch/loongarch/kvm/trace.h

+/* SPDX-License-Identifier: GPL-2.0 */
+/*
+ * Copyright (C) 2020-2023 Loongson Technology Corporation Limited
+ */
+
+#if !defined(_TRACE_KVM_H) || defined(TRACE_HEADER_MULTI_READ)
+#define _TRACE_KVM_H
+
+#include <linux/tracepoint.h>
+#include <asm/kvm_csr.h>
+
+#undef	TRACE_SYSTEM
+#define TRACE_SYSTEM	kvm
+
+/*
+ * Tracepoints for VM enters
+ */
+DECLARE_EVENT_CLASS(kvm_transition,
+	TP_PROTO(struct kvm_vcpu *vcpu),
+	TP_ARGS(vcpu),
+	TP_STRUCT__entry(
+		__field(unsigned long, pc)
+	),
+
+	TP_fast_assign(
+		__entry->pc = vcpu->arch.pc;
+	),
+
+	TP_printk("PC: 0x%08lx", __entry->pc)
+);
+
+DEFINE_EVENT(kvm_transition, kvm_enter,
+	     TP_PROTO(struct kvm_vcpu *vcpu),
+	     TP_ARGS(vcpu));
+
+DEFINE_EVENT(kvm_transition, kvm_reenter,
+	     TP_PROTO(struct kvm_vcpu *vcpu),
+	     TP_ARGS(vcpu));
+
+DEFINE_EVENT(kvm_transition, kvm_out,
+	     TP_PROTO(struct kvm_vcpu *vcpu),
+	     TP_ARGS(vcpu));
+
+/* Further exit reasons */
+#define KVM_TRACE_EXIT_IDLE		64
+#define KVM_TRACE_EXIT_CACHE		65
+
+/* Tracepoints for VM exits */
+#define kvm_trace_symbol_exit_types			\
+	{ KVM_TRACE_EXIT_IDLE,		"IDLE" },	\
+	{ KVM_TRACE_EXIT_CACHE,		"CACHE" }
+
+DECLARE_EVENT_CLASS(kvm_exit,
+	    TP_PROTO(struct kvm_vcpu *vcpu, unsigned int reason),
+	    TP_ARGS(vcpu, reason),
+	    TP_STRUCT__entry(
+			__field(unsigned long, pc)
+			__field(unsigned int, reason)
+	    ),
+
+	    TP_fast_assign(
+			__entry->pc = vcpu->arch.pc;
+			__entry->reason = reason;
+	    ),
+
+	    TP_printk("[%s]PC: 0x%08lx",
+		      __print_symbolic(__entry->reason,
+				       kvm_trace_symbol_exit_types),
+		      __entry->pc)
+);
+
+DEFINE_EVENT(kvm_exit, kvm_exit_idle,
+	     TP_PROTO(struct kvm_vcpu *vcpu, unsigned int reason),
+	     TP_ARGS(vcpu, reason));
+
+DEFINE_EVENT(kvm_exit, kvm_exit_cache,
+	     TP_PROTO(struct kvm_vcpu *vcpu, unsigned int reason),
+	     TP_ARGS(vcpu, reason));
+
+DEFINE_EVENT(kvm_exit, kvm_exit,
+	     TP_PROTO(struct kvm_vcpu *vcpu, unsigned int reason),
+	     TP_ARGS(vcpu, reason));
+
+TRACE_EVENT(kvm_exit_gspr,
+	    TP_PROTO(struct kvm_vcpu *vcpu, unsigned int inst_word),
+	    TP_ARGS(vcpu, inst_word),
+	    TP_STRUCT__entry(
+			__field(unsigned int, inst_word)
+	    ),
+
+	    TP_fast_assign(
+			__entry->inst_word = inst_word;
+	    ),
+
+	    TP_printk("Inst word: 0x%08x", __entry->inst_word)
+);
+
+#define KVM_TRACE_AUX_SAVE		0
+#define KVM_TRACE_AUX_RESTORE		1
+#define KVM_TRACE_AUX_ENABLE		2
+#define KVM_TRACE_AUX_DISABLE		3
+#define KVM_TRACE_AUX_DISCARD		4
+
+#define KVM_TRACE_AUX_FPU		1
+
+#define kvm_trace_symbol_aux_op				\
+	{ KVM_TRACE_AUX_SAVE,		"save" },	\
+	{ KVM_TRACE_AUX_RESTORE,	"restore" },	\
+	{ KVM_TRACE_AUX_ENABLE,		"enable" },	\
+	{ KVM_TRACE_AUX_DISABLE,	"disable" },	\
+	{ KVM_TRACE_AUX_DISCARD,	"discard" }
+
+#define kvm_trace_symbol_aux_state			\
+	{ KVM_TRACE_AUX_FPU,     "FPU" }
+
+TRACE_EVENT(kvm_aux,
+	    TP_PROTO(struct kvm_vcpu *vcpu, unsigned int op,
+		     unsigned int state),
+	    TP_ARGS(vcpu, op, state),
+	    TP_STRUCT__entry(
+			__field(unsigned long, pc)
+			__field(u8, op)
+			__field(u8, state)
+	    ),
+
+	    TP_fast_assign(
+			__entry->pc = vcpu->arch.pc;
+			__entry->op = op;
+			__entry->state = state;
+	    ),
+
+	    TP_printk("%s %s PC: 0x%08lx",
+		      __print_symbolic(__entry->op,
+				       kvm_trace_symbol_aux_op),
+		      __print_symbolic(__entry->state,
+				       kvm_trace_symbol_aux_state),
+		      __entry->pc)
+);
+
+TRACE_EVENT(kvm_vpid_change,
+	    TP_PROTO(struct kvm_vcpu *vcpu, unsigned long vpid),
+	    TP_ARGS(vcpu, vpid),
+	    TP_STRUCT__entry(
+			__field(unsigned long, vpid)
+	    ),
+
+	    TP_fast_assign(
+			__entry->vpid = vpid;
+	    ),
+
+	    TP_printk("VPID: 0x%08lx", __entry->vpid)
+);
+
+#endif /* _TRACE_KVM_H */
+
+#undef TRACE_INCLUDE_PATH
+#define TRACE_INCLUDE_PATH ../../arch/loongarch/kvm
+#undef TRACE_INCLUDE_FILE
+#define TRACE_INCLUDE_FILE trace
+
+/* This part must be outside protection */
+#include <trace/define_trace.h>