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.

1 files changed, 33 insertions, 0 deletions

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;