Merge tag 'loongarch-kvm-6.10' of git://git.kernel.org/pub/scm/linux/kernel/git/chenhuacai/linux-loongson into HEAD

LoongArch KVM changes for v6.10

1. Add ParaVirt IPI support.
2. Add software breakpoint support.
3. Add mmio trace events support.

19 files changed, 345 insertions, 19 deletions

diff --git a/arch/loongarch/include/asm/Kbuild b/arch/loongarch/include/asm/Kbuild
index 2dbec7853ae8..c862672ed953 100644
--- a/arch/loongarch/include/asm/Kbuild
+++ b/arch/loongarch/include/asm/Kbuild
@@ -26,4 +26,3 @@ generic-y += poll.h
 generic-y += param.h
 generic-y += posix_types.h
 generic-y += resource.h
-generic-y += kvm_para.h
diff --git a/arch/loongarch/include/asm/addrspace.h b/arch/loongarch/include/asm/addrspace.h
index b24437e28c6e..7bd47d65bf7a 100644
--- a/arch/loongarch/include/asm/addrspace.h
+++ b/arch/loongarch/include/asm/addrspace.h
@@ -11,6 +11,7 @@
 #define _ASM_ADDRSPACE_H
 
 #include <linux/const.h>
+#include <linux/sizes.h>
 
 #include <asm/loongarch.h>
 
diff --git a/arch/loongarch/include/asm/crash_core.h b/arch/loongarch/include/asm/crash_reserve.h
index 218bdbfa527b..a1d9b84b1c7d 100644
--- a/arch/loongarch/include/asm/crash_core.h
+++ b/arch/loongarch/include/asm/crash_reserve.h
@@ -1,6 +1,6 @@
 /* SPDX-License-Identifier: GPL-2.0-only */
-#ifndef _LOONGARCH_CRASH_CORE_H
-#define _LOONGARCH_CRASH_CORE_H
+#ifndef _LOONGARCH_CRASH_RESERVE_H
+#define _LOONGARCH_CRASH_RESERVE_H
 
 #define CRASH_ALIGN			SZ_2M
 
diff --git a/arch/loongarch/include/asm/hardirq.h b/arch/loongarch/include/asm/hardirq.h
index 0ef3b18f8980..d41138abcf26 100644
--- a/arch/loongarch/include/asm/hardirq.h
+++ b/arch/loongarch/include/asm/hardirq.h
@@ -14,9 +14,15 @@ extern void ack_bad_irq(unsigned int irq);
 
 #define NR_IPI	2
 
+enum ipi_msg_type {
+	IPI_RESCHEDULE,
+	IPI_CALL_FUNCTION,
+};
+
 typedef struct {
 	unsigned int ipi_irqs[NR_IPI];
 	unsigned int __softirq_pending;
+	atomic_t message ____cacheline_aligned_in_smp;
 } ____cacheline_aligned irq_cpustat_t;
 
 DECLARE_PER_CPU_SHARED_ALIGNED(irq_cpustat_t, irq_stat);
diff --git a/arch/loongarch/include/asm/inst.h b/arch/loongarch/include/asm/inst.h
index d8f637f9e400..c3993fd88aba 100644
--- a/arch/loongarch/include/asm/inst.h
+++ b/arch/loongarch/include/asm/inst.h
@@ -12,6 +12,7 @@
 
 #define INSN_NOP		0x03400000
 #define INSN_BREAK		0x002a0000
+#define INSN_HVCL		0x002b8000
 
 #define ADDR_IMMMASK_LU52ID	0xFFF0000000000000
 #define ADDR_IMMMASK_LU32ID	0x000FFFFF00000000
@@ -67,6 +68,7 @@ enum reg2_op {
 	revhd_op	= 0x11,
 	extwh_op	= 0x16,
 	extwb_op	= 0x17,
+	cpucfg_op	= 0x1b,
 	iocsrrdb_op     = 0x19200,
 	iocsrrdh_op     = 0x19201,
 	iocsrrdw_op     = 0x19202,
diff --git a/arch/loongarch/include/asm/io.h b/arch/loongarch/include/asm/io.h
index 4a8adcca329b..c2f9979b2979 100644
--- a/arch/loongarch/include/asm/io.h
+++ b/arch/loongarch/include/asm/io.h
@@ -14,11 +14,6 @@
 #include <asm/pgtable-bits.h>
 #include <asm/string.h>
 
-/*
- * Change "struct page" to physical address.
- */
-#define page_to_phys(page)	((phys_addr_t)page_to_pfn(page) << PAGE_SHIFT)
-
 extern void __init __iomem *early_ioremap(u64 phys_addr, unsigned long size);
 extern void __init early_iounmap(void __iomem *addr, unsigned long size);
 
@@ -73,6 +68,21 @@ extern void __memcpy_fromio(void *to, const volatile void __iomem *from, size_t
 
 #define __io_aw() mmiowb()
 
+#ifdef CONFIG_KFENCE
+#define virt_to_phys(kaddr)								\
+({											\
+	(likely((unsigned long)kaddr < vm_map_base)) ? __pa((unsigned long)kaddr) :	\
+	page_to_phys(tlb_virt_to_page((unsigned long)kaddr)) + offset_in_page((unsigned long)kaddr);\
+})
+
+#define phys_to_virt(paddr)								\
+({											\
+	extern char *__kfence_pool;							\
+	(unlikely(__kfence_pool == NULL)) ? __va((unsigned long)paddr) :		\
+	page_address(phys_to_page((unsigned long)paddr)) + offset_in_page((unsigned long)paddr);\
+})
+#endif
+
 #include <asm-generic/io.h>
 
 #define ARCH_HAS_VALID_PHYS_ADDR_RANGE
diff --git a/arch/loongarch/include/asm/irq.h b/arch/loongarch/include/asm/irq.h
index 218b4da0ea90..480418bc5071 100644
--- a/arch/loongarch/include/asm/irq.h
+++ b/arch/loongarch/include/asm/irq.h
@@ -117,7 +117,16 @@ extern struct fwnode_handle *liointc_handle;
 extern struct fwnode_handle *pch_lpc_handle;
 extern struct fwnode_handle *pch_pic_handle[MAX_IO_PICS];
 
-extern irqreturn_t loongson_ipi_interrupt(int irq, void *dev);
+static inline int get_percpu_irq(int vector)
+{
+	struct irq_domain *d;
+
+	d = irq_find_matching_fwnode(cpuintc_handle, DOMAIN_BUS_ANY);
+	if (d)
+		return irq_create_mapping(d, vector);
+
+	return -EINVAL;
+}
 
 #include <asm-generic/irq.h>
 
diff --git a/arch/loongarch/include/asm/kfence.h b/arch/loongarch/include/asm/kfence.h
index 6c82aea1c993..a6a5760da3a3 100644
--- a/arch/loongarch/include/asm/kfence.h
+++ b/arch/loongarch/include/asm/kfence.h
@@ -16,6 +16,7 @@
 static inline bool arch_kfence_init_pool(void)
 {
 	int err;
+	char *kaddr, *vaddr;
 	char *kfence_pool = __kfence_pool;
 	struct vm_struct *area;
 
@@ -35,6 +36,14 @@ static inline bool arch_kfence_init_pool(void)
 		return false;
 	}
 
+	kaddr = kfence_pool;
+	vaddr = __kfence_pool;
+	while (kaddr < kfence_pool + KFENCE_POOL_SIZE) {
+		set_page_address(virt_to_page(kaddr), vaddr);
+		kaddr += PAGE_SIZE;
+		vaddr += PAGE_SIZE;
+	}
+
 	return true;
 }
 
diff --git a/arch/loongarch/include/asm/kvm_host.h b/arch/loongarch/include/asm/kvm_host.h
index 69305441f40d..c87b6ea0ec47 100644
--- a/arch/loongarch/include/asm/kvm_host.h
+++ b/arch/loongarch/include/asm/kvm_host.h
@@ -31,6 +31,11 @@
 
 #define KVM_HALT_POLL_NS_DEFAULT	500000
 
+#define KVM_GUESTDBG_SW_BP_MASK		\
+	(KVM_GUESTDBG_ENABLE | KVM_GUESTDBG_USE_SW_BP)
+#define KVM_GUESTDBG_VALID_MASK		\
+	(KVM_GUESTDBG_ENABLE | KVM_GUESTDBG_USE_SW_BP | KVM_GUESTDBG_SINGLESTEP)
+
 struct kvm_vm_stat {
 	struct kvm_vm_stat_generic generic;
 	u64 pages;
@@ -43,6 +48,7 @@ struct kvm_vcpu_stat {
 	u64 idle_exits;
 	u64 cpucfg_exits;
 	u64 signal_exits;
+	u64 hypercall_exits;
 };
 
 #define KVM_MEM_HUGEPAGE_CAPABLE	(1UL << 0)
@@ -64,6 +70,31 @@ struct kvm_world_switch {
 
 #define MAX_PGTABLE_LEVELS	4
 
+/*
+ * Physical CPUID is used for interrupt routing, there are different
+ * definitions about physical cpuid on different hardwares.
+ *
+ *  For LOONGARCH_CSR_CPUID register, max CPUID size if 512
+ *  For IPI hardware, max destination CPUID size 1024
+ *  For extioi interrupt controller, max destination CPUID size is 256
+ *  For msgint interrupt controller, max supported CPUID size is 65536
+ *
+ * Currently max CPUID is defined as 256 for KVM hypervisor, in future
+ * it will be expanded to 4096, including 16 packages at most. And every
+ * package supports at most 256 vcpus
+ */
+#define KVM_MAX_PHYID		256
+
+struct kvm_phyid_info {
+	struct kvm_vcpu	*vcpu;
+	bool		enabled;
+};
+
+struct kvm_phyid_map {
+	int max_phyid;
+	struct kvm_phyid_info phys_map[KVM_MAX_PHYID];
+};
+
 struct kvm_arch {
 	/* Guest physical mm */
 	kvm_pte_t *pgd;
@@ -71,6 +102,8 @@ struct kvm_arch {
 	unsigned long invalid_ptes[MAX_PGTABLE_LEVELS];
 	unsigned int  pte_shifts[MAX_PGTABLE_LEVELS];
 	unsigned int  root_level;
+	spinlock_t    phyid_map_lock;
+	struct kvm_phyid_map  *phyid_map;
 
 	s64 time_offset;
 	struct kvm_context __percpu *vmcs;
diff --git a/arch/loongarch/include/asm/kvm_para.h b/arch/loongarch/include/asm/kvm_para.h
new file mode 100644
index 000000000000..4ba2312e5f8c
--- /dev/null
+++ b/arch/loongarch/include/asm/kvm_para.h
@@ -0,0 +1,161 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+#ifndef _ASM_LOONGARCH_KVM_PARA_H
+#define _ASM_LOONGARCH_KVM_PARA_H
+
+/*
+ * Hypercall code field
+ */
+#define HYPERVISOR_KVM			1
+#define HYPERVISOR_VENDOR_SHIFT		8
+#define HYPERCALL_ENCODE(vendor, code)	((vendor << HYPERVISOR_VENDOR_SHIFT) + code)
+
+#define KVM_HCALL_CODE_SERVICE		0
+#define KVM_HCALL_CODE_SWDBG		1
+
+#define KVM_HCALL_SERVICE		HYPERCALL_ENCODE(HYPERVISOR_KVM, KVM_HCALL_CODE_SERVICE)
+#define  KVM_HCALL_FUNC_IPI		1
+
+#define KVM_HCALL_SWDBG			HYPERCALL_ENCODE(HYPERVISOR_KVM, KVM_HCALL_CODE_SWDBG)
+
+/*
+ * LoongArch hypercall return code
+ */
+#define KVM_HCALL_SUCCESS		0
+#define KVM_HCALL_INVALID_CODE		-1UL
+#define KVM_HCALL_INVALID_PARAMETER	-2UL
+
+/*
+ * Hypercall interface for KVM hypervisor
+ *
+ * a0: function identifier
+ * a1-a6: args
+ * Return value will be placed in a0.
+ * Up to 6 arguments are passed in a1, a2, a3, a4, a5, a6.
+ */
+static __always_inline long kvm_hypercall0(u64 fid)
+{
+	register long ret asm("a0");
+	register unsigned long fun asm("a0") = fid;
+
+	__asm__ __volatile__(
+		"hvcl "__stringify(KVM_HCALL_SERVICE)
+		: "=r" (ret)
+		: "r" (fun)
+		: "memory"
+		);
+
+	return ret;
+}
+
+static __always_inline long kvm_hypercall1(u64 fid, unsigned long arg0)
+{
+	register long ret asm("a0");
+	register unsigned long fun asm("a0") = fid;
+	register unsigned long a1  asm("a1") = arg0;
+
+	__asm__ __volatile__(
+		"hvcl "__stringify(KVM_HCALL_SERVICE)
+		: "=r" (ret)
+		: "r" (fun), "r" (a1)
+		: "memory"
+		);
+
+	return ret;
+}
+
+static __always_inline long kvm_hypercall2(u64 fid,
+		unsigned long arg0, unsigned long arg1)
+{
+	register long ret asm("a0");
+	register unsigned long fun asm("a0") = fid;
+	register unsigned long a1  asm("a1") = arg0;
+	register unsigned long a2  asm("a2") = arg1;
+
+	__asm__ __volatile__(
+		"hvcl "__stringify(KVM_HCALL_SERVICE)
+		: "=r" (ret)
+		: "r" (fun), "r" (a1), "r" (a2)
+		: "memory"
+		);
+
+	return ret;
+}
+
+static __always_inline long kvm_hypercall3(u64 fid,
+	unsigned long arg0, unsigned long arg1, unsigned long arg2)
+{
+	register long ret asm("a0");
+	register unsigned long fun asm("a0") = fid;
+	register unsigned long a1  asm("a1") = arg0;
+	register unsigned long a2  asm("a2") = arg1;
+	register unsigned long a3  asm("a3") = arg2;
+
+	__asm__ __volatile__(
+		"hvcl "__stringify(KVM_HCALL_SERVICE)
+		: "=r" (ret)
+		: "r" (fun), "r" (a1), "r" (a2), "r" (a3)
+		: "memory"
+		);
+
+	return ret;
+}
+
+static __always_inline long kvm_hypercall4(u64 fid,
+		unsigned long arg0, unsigned long arg1,
+		unsigned long arg2, unsigned long arg3)
+{
+	register long ret asm("a0");
+	register unsigned long fun asm("a0") = fid;
+	register unsigned long a1  asm("a1") = arg0;
+	register unsigned long a2  asm("a2") = arg1;
+	register unsigned long a3  asm("a3") = arg2;
+	register unsigned long a4  asm("a4") = arg3;
+
+	__asm__ __volatile__(
+		"hvcl "__stringify(KVM_HCALL_SERVICE)
+		: "=r" (ret)
+		: "r"(fun), "r" (a1), "r" (a2), "r" (a3), "r" (a4)
+		: "memory"
+		);
+
+	return ret;
+}
+
+static __always_inline long kvm_hypercall5(u64 fid,
+		unsigned long arg0, unsigned long arg1,
+		unsigned long arg2, unsigned long arg3, unsigned long arg4)
+{
+	register long ret asm("a0");
+	register unsigned long fun asm("a0") = fid;
+	register unsigned long a1  asm("a1") = arg0;
+	register unsigned long a2  asm("a2") = arg1;
+	register unsigned long a3  asm("a3") = arg2;
+	register unsigned long a4  asm("a4") = arg3;
+	register unsigned long a5  asm("a5") = arg4;
+
+	__asm__ __volatile__(
+		"hvcl "__stringify(KVM_HCALL_SERVICE)
+		: "=r" (ret)
+		: "r"(fun), "r" (a1), "r" (a2), "r" (a3), "r" (a4), "r" (a5)
+		: "memory"
+		);
+
+	return ret;
+}
+
+static inline unsigned int kvm_arch_para_features(void)
+{
+	return 0;
+}
+
+static inline unsigned int kvm_arch_para_hints(void)
+{
+	return 0;
+}
+
+static inline bool kvm_check_and_clear_guest_paused(void)
+{
+	return false;
+}
+
+#endif /* _ASM_LOONGARCH_KVM_PARA_H */
diff --git a/arch/loongarch/include/asm/kvm_vcpu.h b/arch/loongarch/include/asm/kvm_vcpu.h
index 0cb4fdb8a9b5..590a92cb5416 100644
--- a/arch/loongarch/include/asm/kvm_vcpu.h
+++ b/arch/loongarch/include/asm/kvm_vcpu.h
@@ -81,6 +81,7 @@ 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);
+struct kvm_vcpu *kvm_get_vcpu_by_cpuid(struct kvm *kvm, int cpuid);
 
 /*
  * Loongarch KVM guest interrupt handling
@@ -109,4 +110,14 @@ static inline int kvm_queue_exception(struct kvm_vcpu *vcpu,
 		return -1;
 }
 
+static inline unsigned long kvm_read_reg(struct kvm_vcpu *vcpu, int num)
+{
+	return vcpu->arch.gprs[num];
+}
+
+static inline void kvm_write_reg(struct kvm_vcpu *vcpu, int num, unsigned long val)
+{
+	vcpu->arch.gprs[num] = val;
+}
+
 #endif /* __ASM_LOONGARCH_KVM_VCPU_H__ */
diff --git a/arch/loongarch/include/asm/loongarch.h b/arch/loongarch/include/asm/loongarch.h
index 46366e783c84..eb09adda54b7 100644
--- a/arch/loongarch/include/asm/loongarch.h
+++ b/arch/loongarch/include/asm/loongarch.h
@@ -158,6 +158,18 @@
 #define  CPUCFG48_VFPU_CG		BIT(2)
 #define  CPUCFG48_RAM_CG		BIT(3)
 
+/*
+ * CPUCFG index area: 0x40000000 -- 0x400000ff
+ * SW emulation for KVM hypervirsor
+ */
+#define CPUCFG_KVM_BASE			0x40000000
+#define CPUCFG_KVM_SIZE			0x100
+
+#define CPUCFG_KVM_SIG			(CPUCFG_KVM_BASE + 0)
+#define  KVM_SIGNATURE			"KVM\0"
+#define CPUCFG_KVM_FEATURE		(CPUCFG_KVM_BASE + 4)
+#define  KVM_FEATURE_IPI		BIT(1)
+
 #ifndef __ASSEMBLY__
 
 /* CSR */
diff --git a/arch/loongarch/include/asm/page.h b/arch/loongarch/include/asm/page.h
index 44027060c54a..e85df33f11c7 100644
--- a/arch/loongarch/include/asm/page.h
+++ b/arch/loongarch/include/asm/page.h
@@ -78,7 +78,26 @@ typedef struct { unsigned long pgprot; } pgprot_t;
 struct page *dmw_virt_to_page(unsigned long kaddr);
 struct page *tlb_virt_to_page(unsigned long kaddr);
 
-#define virt_to_pfn(kaddr)	PFN_DOWN(PHYSADDR(kaddr))
+#define pfn_to_phys(pfn)	__pfn_to_phys(pfn)
+#define phys_to_pfn(paddr)	__phys_to_pfn(paddr)
+
+#define page_to_phys(page)	pfn_to_phys(page_to_pfn(page))
+#define phys_to_page(paddr)	pfn_to_page(phys_to_pfn(paddr))
+
+#ifndef CONFIG_KFENCE
+
+#define page_to_virt(page)	__va(page_to_phys(page))
+#define virt_to_page(kaddr)	phys_to_page(__pa(kaddr))
+
+#else
+
+#define WANT_PAGE_VIRTUAL
+
+#define page_to_virt(page)								\
+({											\
+	extern char *__kfence_pool;							\
+	(__kfence_pool == NULL) ? __va(page_to_phys(page)) : page_address(page);	\
+})
 
 #define virt_to_page(kaddr)								\
 ({											\
@@ -86,6 +105,11 @@ struct page *tlb_virt_to_page(unsigned long kaddr);
 	dmw_virt_to_page((unsigned long)kaddr) : tlb_virt_to_page((unsigned long)kaddr);\
 })
 
+#endif
+
+#define pfn_to_virt(pfn)	page_to_virt(pfn_to_page(pfn))
+#define virt_to_pfn(kaddr)	page_to_pfn(virt_to_page(kaddr))
+
 extern int __virt_addr_valid(volatile void *kaddr);
 #define virt_addr_valid(kaddr)	__virt_addr_valid((volatile void *)(kaddr))
 
diff --git a/arch/loongarch/include/asm/paravirt.h b/arch/loongarch/include/asm/paravirt.h
new file mode 100644
index 000000000000..0965710f47f2
--- /dev/null
+++ b/arch/loongarch/include/asm/paravirt.h
@@ -0,0 +1,30 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+#ifndef _ASM_LOONGARCH_PARAVIRT_H
+#define _ASM_LOONGARCH_PARAVIRT_H
+
+#ifdef CONFIG_PARAVIRT
+
+#include <linux/static_call_types.h>
+struct static_key;
+extern struct static_key paravirt_steal_enabled;
+extern struct static_key paravirt_steal_rq_enabled;
+
+u64 dummy_steal_clock(int cpu);
+DECLARE_STATIC_CALL(pv_steal_clock, dummy_steal_clock);
+
+static inline u64 paravirt_steal_clock(int cpu)
+{
+	return static_call(pv_steal_clock)(cpu);
+}
+
+int __init pv_ipi_init(void);
+
+#else
+
+static inline int pv_ipi_init(void)
+{
+	return 0;
+}
+
+#endif // CONFIG_PARAVIRT
+#endif
diff --git a/arch/loongarch/include/asm/paravirt_api_clock.h b/arch/loongarch/include/asm/paravirt_api_clock.h
new file mode 100644
index 000000000000..65ac7cee0dad
--- /dev/null
+++ b/arch/loongarch/include/asm/paravirt_api_clock.h
@@ -0,0 +1 @@
+#include <asm/paravirt.h>
diff --git a/arch/loongarch/include/asm/perf_event.h b/arch/loongarch/include/asm/perf_event.h
index 2a35a0bc2aaa..52b638059e40 100644
--- a/arch/loongarch/include/asm/perf_event.h
+++ b/arch/loongarch/include/asm/perf_event.h
@@ -7,6 +7,14 @@
 #ifndef __LOONGARCH_PERF_EVENT_H__
 #define __LOONGARCH_PERF_EVENT_H__
 
+#include <asm/ptrace.h>
+
 #define perf_arch_bpf_user_pt_regs(regs) (struct user_pt_regs *)regs
 
+#define perf_arch_fetch_caller_regs(regs, __ip) { \
+	(regs)->csr_era = (__ip); \
+	(regs)->regs[3] = current_stack_pointer; \
+	(regs)->regs[22] = (unsigned long) __builtin_frame_address(0); \
+}
+
 #endif /* __LOONGARCH_PERF_EVENT_H__ */
diff --git a/arch/loongarch/include/asm/smp.h b/arch/loongarch/include/asm/smp.h
index f81e5f01d619..1c51bdf3516a 100644
--- a/arch/loongarch/include/asm/smp.h
+++ b/arch/loongarch/include/asm/smp.h
@@ -12,6 +12,13 @@
 #include <linux/threads.h>
 #include <linux/cpumask.h>
 
+struct smp_ops {
+	void (*init_ipi)(void);
+	void (*send_ipi_single)(int cpu, unsigned int action);
+	void (*send_ipi_mask)(const struct cpumask *mask, unsigned int action);
+};
+extern struct smp_ops mp_ops;
+
 extern int smp_num_siblings;
 extern int num_processors;
 extern int disabled_cpus;
@@ -24,8 +31,6 @@ void loongson_prepare_cpus(unsigned int max_cpus);
 void loongson_boot_secondary(int cpu, struct task_struct *idle);
 void loongson_init_secondary(void);
 void loongson_smp_finish(void);
-void loongson_send_ipi_single(int cpu, unsigned int action);
-void loongson_send_ipi_mask(const struct cpumask *mask, unsigned int action);
 #ifdef CONFIG_HOTPLUG_CPU
 int loongson_cpu_disable(void);
 void loongson_cpu_die(unsigned int cpu);
@@ -59,9 +64,12 @@ extern int __cpu_logical_map[NR_CPUS];
 
 #define cpu_physical_id(cpu)	cpu_logical_map(cpu)
 
-#define SMP_BOOT_CPU		0x1
-#define SMP_RESCHEDULE		0x2
-#define SMP_CALL_FUNCTION	0x4
+#define ACTION_BOOT_CPU	0
+#define ACTION_RESCHEDULE	1
+#define ACTION_CALL_FUNCTION	2
+#define SMP_BOOT_CPU		BIT(ACTION_BOOT_CPU)
+#define SMP_RESCHEDULE		BIT(ACTION_RESCHEDULE)
+#define SMP_CALL_FUNCTION	BIT(ACTION_CALL_FUNCTION)
 
 struct secondary_data {
 	unsigned long stack;
@@ -81,12 +89,12 @@ extern void show_ipi_list(struct seq_file *p, int prec);
 
 static inline void arch_send_call_function_single_ipi(int cpu)
 {
-	loongson_send_ipi_single(cpu, SMP_CALL_FUNCTION);
+	mp_ops.send_ipi_single(cpu, ACTION_CALL_FUNCTION);
 }
 
 static inline void arch_send_call_function_ipi_mask(const struct cpumask *mask)
 {
-	loongson_send_ipi_mask(mask, SMP_CALL_FUNCTION);
+	mp_ops.send_ipi_mask(mask, ACTION_CALL_FUNCTION);
 }
 
 #ifdef CONFIG_HOTPLUG_CPU
diff --git a/arch/loongarch/include/asm/tlb.h b/arch/loongarch/include/asm/tlb.h
index da7a3b5b9374..e071f5e9e858 100644
--- a/arch/loongarch/include/asm/tlb.h
+++ b/arch/loongarch/include/asm/tlb.h
@@ -132,8 +132,6 @@ static __always_inline void invtlb_all(u32 op, u32 info, u64 addr)
 		);
 }
 
-#define __tlb_remove_tlb_entry(tlb, ptep, address) do { } while (0)
-
 static void tlb_flush(struct mmu_gather *tlb);
 
 #define tlb_flush tlb_flush
diff --git a/arch/loongarch/include/uapi/asm/kvm.h b/arch/loongarch/include/uapi/asm/kvm.h
index 109785922cf9..f9abef382317 100644
--- a/arch/loongarch/include/uapi/asm/kvm.h
+++ b/arch/loongarch/include/uapi/asm/kvm.h
@@ -17,6 +17,8 @@
 #define KVM_COALESCED_MMIO_PAGE_OFFSET	1
 #define KVM_DIRTY_LOG_PAGE_OFFSET	64
 
+#define KVM_GUESTDBG_USE_SW_BP		0x00010000
+
 /*
  * for KVM_GET_REGS and KVM_SET_REGS
  */
@@ -72,6 +74,8 @@ struct kvm_fpu {
 
 #define KVM_REG_LOONGARCH_COUNTER	(KVM_REG_LOONGARCH_KVM | KVM_REG_SIZE_U64 | 1)
 #define KVM_REG_LOONGARCH_VCPU_RESET	(KVM_REG_LOONGARCH_KVM | KVM_REG_SIZE_U64 | 2)
+/* Debugging: Special instruction for software breakpoint */
+#define KVM_REG_LOONGARCH_DEBUG_INST	(KVM_REG_LOONGARCH_KVM | KVM_REG_SIZE_U64 | 3)
 
 #define LOONGARCH_REG_SHIFT		3
 #define LOONGARCH_REG_64(TYPE, REG)	(TYPE | KVM_REG_SIZE_U64 | (REG << LOONGARCH_REG_SHIFT))