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-rw-r--r--arch/riscv/include/asm/irq.h2
-rw-r--r--arch/riscv/include/asm/kvm_aia.h2
-rw-r--r--arch/riscv/include/asm/kvm_gstage.h72
-rw-r--r--arch/riscv/include/asm/kvm_host.h105
-rw-r--r--arch/riscv/include/asm/kvm_mmu.h21
-rw-r--r--arch/riscv/include/asm/kvm_tlb.h84
-rw-r--r--arch/riscv/include/asm/kvm_vcpu_sbi.h12
-rw-r--r--arch/riscv/include/asm/kvm_vmid.h27
8 files changed, 224 insertions, 101 deletions
diff --git a/arch/riscv/include/asm/irq.h b/arch/riscv/include/asm/irq.h
index 7b038f3b7cb0..59c975f750c9 100644
--- a/arch/riscv/include/asm/irq.h
+++ b/arch/riscv/include/asm/irq.h
@@ -22,6 +22,8 @@ void arch_trigger_cpumask_backtrace(const cpumask_t *mask, int exclude_cpu);
void riscv_set_intc_hwnode_fn(struct fwnode_handle *(*fn)(void));
struct fwnode_handle *riscv_get_intc_hwnode(void);
+int riscv_get_hart_index(struct fwnode_handle *fwnode, u32 logical_index,
+ u32 *hart_index);
#ifdef CONFIG_ACPI
diff --git a/arch/riscv/include/asm/kvm_aia.h b/arch/riscv/include/asm/kvm_aia.h
index 5acce285e56e..b04ecdd1a860 100644
--- a/arch/riscv/include/asm/kvm_aia.h
+++ b/arch/riscv/include/asm/kvm_aia.h
@@ -150,7 +150,7 @@ int kvm_riscv_vcpu_aia_rmw_ireg(struct kvm_vcpu *vcpu, unsigned int csr_num,
int kvm_riscv_vcpu_aia_update(struct kvm_vcpu *vcpu);
void kvm_riscv_vcpu_aia_reset(struct kvm_vcpu *vcpu);
-int kvm_riscv_vcpu_aia_init(struct kvm_vcpu *vcpu);
+void kvm_riscv_vcpu_aia_init(struct kvm_vcpu *vcpu);
void kvm_riscv_vcpu_aia_deinit(struct kvm_vcpu *vcpu);
int kvm_riscv_aia_inject_msi_by_id(struct kvm *kvm, u32 hart_index,
diff --git a/arch/riscv/include/asm/kvm_gstage.h b/arch/riscv/include/asm/kvm_gstage.h
new file mode 100644
index 000000000000..595e2183173e
--- /dev/null
+++ b/arch/riscv/include/asm/kvm_gstage.h
@@ -0,0 +1,72 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+/*
+ * Copyright (C) 2019 Western Digital Corporation or its affiliates.
+ * Copyright (c) 2025 Ventana Micro Systems Inc.
+ */
+
+#ifndef __RISCV_KVM_GSTAGE_H_
+#define __RISCV_KVM_GSTAGE_H_
+
+#include <linux/kvm_types.h>
+
+struct kvm_gstage {
+ struct kvm *kvm;
+ unsigned long flags;
+#define KVM_GSTAGE_FLAGS_LOCAL BIT(0)
+ unsigned long vmid;
+ pgd_t *pgd;
+};
+
+struct kvm_gstage_mapping {
+ gpa_t addr;
+ pte_t pte;
+ u32 level;
+};
+
+#ifdef CONFIG_64BIT
+#define kvm_riscv_gstage_index_bits 9
+#else
+#define kvm_riscv_gstage_index_bits 10
+#endif
+
+extern unsigned long kvm_riscv_gstage_mode;
+extern unsigned long kvm_riscv_gstage_pgd_levels;
+
+#define kvm_riscv_gstage_pgd_xbits 2
+#define kvm_riscv_gstage_pgd_size (1UL << (HGATP_PAGE_SHIFT + kvm_riscv_gstage_pgd_xbits))
+#define kvm_riscv_gstage_gpa_bits (HGATP_PAGE_SHIFT + \
+ (kvm_riscv_gstage_pgd_levels * \
+ kvm_riscv_gstage_index_bits) + \
+ kvm_riscv_gstage_pgd_xbits)
+#define kvm_riscv_gstage_gpa_size ((gpa_t)(1ULL << kvm_riscv_gstage_gpa_bits))
+
+bool kvm_riscv_gstage_get_leaf(struct kvm_gstage *gstage, gpa_t addr,
+ pte_t **ptepp, u32 *ptep_level);
+
+int kvm_riscv_gstage_set_pte(struct kvm_gstage *gstage,
+ struct kvm_mmu_memory_cache *pcache,
+ const struct kvm_gstage_mapping *map);
+
+int kvm_riscv_gstage_map_page(struct kvm_gstage *gstage,
+ struct kvm_mmu_memory_cache *pcache,
+ gpa_t gpa, phys_addr_t hpa, unsigned long page_size,
+ bool page_rdonly, bool page_exec,
+ struct kvm_gstage_mapping *out_map);
+
+enum kvm_riscv_gstage_op {
+ GSTAGE_OP_NOP = 0, /* Nothing */
+ GSTAGE_OP_CLEAR, /* Clear/Unmap */
+ GSTAGE_OP_WP, /* Write-protect */
+};
+
+void kvm_riscv_gstage_op_pte(struct kvm_gstage *gstage, gpa_t addr,
+ pte_t *ptep, u32 ptep_level, enum kvm_riscv_gstage_op op);
+
+void kvm_riscv_gstage_unmap_range(struct kvm_gstage *gstage,
+ gpa_t start, gpa_t size, bool may_block);
+
+void kvm_riscv_gstage_wp_range(struct kvm_gstage *gstage, gpa_t start, gpa_t end);
+
+void kvm_riscv_gstage_mode_detect(void);
+
+#endif
diff --git a/arch/riscv/include/asm/kvm_host.h b/arch/riscv/include/asm/kvm_host.h
index bcbf8b1ec115..d71d3299a335 100644
--- a/arch/riscv/include/asm/kvm_host.h
+++ b/arch/riscv/include/asm/kvm_host.h
@@ -16,6 +16,8 @@
#include <asm/hwcap.h>
#include <asm/kvm_aia.h>
#include <asm/ptrace.h>
+#include <asm/kvm_tlb.h>
+#include <asm/kvm_vmid.h>
#include <asm/kvm_vcpu_fp.h>
#include <asm/kvm_vcpu_insn.h>
#include <asm/kvm_vcpu_sbi.h>
@@ -36,14 +38,16 @@
#define KVM_REQ_UPDATE_HGATP KVM_ARCH_REQ(2)
#define KVM_REQ_FENCE_I \
KVM_ARCH_REQ_FLAGS(3, KVM_REQUEST_WAIT | KVM_REQUEST_NO_WAKEUP)
-#define KVM_REQ_HFENCE_GVMA_VMID_ALL KVM_REQ_TLB_FLUSH
#define KVM_REQ_HFENCE_VVMA_ALL \
KVM_ARCH_REQ_FLAGS(4, KVM_REQUEST_WAIT | KVM_REQUEST_NO_WAKEUP)
#define KVM_REQ_HFENCE \
KVM_ARCH_REQ_FLAGS(5, KVM_REQUEST_WAIT | KVM_REQUEST_NO_WAKEUP)
#define KVM_REQ_STEAL_UPDATE KVM_ARCH_REQ(6)
+#define __KVM_HAVE_ARCH_FLUSH_REMOTE_TLBS_RANGE
+
#define KVM_HEDELEG_DEFAULT (BIT(EXC_INST_MISALIGNED) | \
+ BIT(EXC_INST_ILLEGAL) | \
BIT(EXC_BREAKPOINT) | \
BIT(EXC_SYSCALL) | \
BIT(EXC_INST_PAGE_FAULT) | \
@@ -54,24 +58,6 @@
BIT(IRQ_VS_TIMER) | \
BIT(IRQ_VS_EXT))
-enum kvm_riscv_hfence_type {
- KVM_RISCV_HFENCE_UNKNOWN = 0,
- KVM_RISCV_HFENCE_GVMA_VMID_GPA,
- KVM_RISCV_HFENCE_VVMA_ASID_GVA,
- KVM_RISCV_HFENCE_VVMA_ASID_ALL,
- KVM_RISCV_HFENCE_VVMA_GVA,
-};
-
-struct kvm_riscv_hfence {
- enum kvm_riscv_hfence_type type;
- unsigned long asid;
- unsigned long order;
- gpa_t addr;
- gpa_t size;
-};
-
-#define KVM_RISCV_VCPU_MAX_HFENCE 64
-
struct kvm_vm_stat {
struct kvm_vm_stat_generic generic;
};
@@ -97,15 +83,6 @@ struct kvm_vcpu_stat {
struct kvm_arch_memory_slot {
};
-struct kvm_vmid {
- /*
- * Writes to vmid_version and vmid happen with vmid_lock held
- * whereas reads happen without any lock held.
- */
- unsigned long vmid_version;
- unsigned long vmid;
-};
-
struct kvm_arch {
/* G-stage vmid */
struct kvm_vmid vmid;
@@ -309,77 +286,6 @@ static inline bool kvm_arch_pmi_in_guest(struct kvm_vcpu *vcpu)
static inline void kvm_arch_vcpu_blocking(struct kvm_vcpu *vcpu) {}
static inline void kvm_arch_vcpu_unblocking(struct kvm_vcpu *vcpu) {}
-#define KVM_RISCV_GSTAGE_TLB_MIN_ORDER 12
-
-void kvm_riscv_local_hfence_gvma_vmid_gpa(unsigned long vmid,
- gpa_t gpa, gpa_t gpsz,
- unsigned long order);
-void kvm_riscv_local_hfence_gvma_vmid_all(unsigned long vmid);
-void kvm_riscv_local_hfence_gvma_gpa(gpa_t gpa, gpa_t gpsz,
- unsigned long order);
-void kvm_riscv_local_hfence_gvma_all(void);
-void kvm_riscv_local_hfence_vvma_asid_gva(unsigned long vmid,
- unsigned long asid,
- unsigned long gva,
- unsigned long gvsz,
- unsigned long order);
-void kvm_riscv_local_hfence_vvma_asid_all(unsigned long vmid,
- unsigned long asid);
-void kvm_riscv_local_hfence_vvma_gva(unsigned long vmid,
- unsigned long gva, unsigned long gvsz,
- unsigned long order);
-void kvm_riscv_local_hfence_vvma_all(unsigned long vmid);
-
-void kvm_riscv_local_tlb_sanitize(struct kvm_vcpu *vcpu);
-
-void kvm_riscv_fence_i_process(struct kvm_vcpu *vcpu);
-void kvm_riscv_hfence_gvma_vmid_all_process(struct kvm_vcpu *vcpu);
-void kvm_riscv_hfence_vvma_all_process(struct kvm_vcpu *vcpu);
-void kvm_riscv_hfence_process(struct kvm_vcpu *vcpu);
-
-void kvm_riscv_fence_i(struct kvm *kvm,
- unsigned long hbase, unsigned long hmask);
-void kvm_riscv_hfence_gvma_vmid_gpa(struct kvm *kvm,
- unsigned long hbase, unsigned long hmask,
- gpa_t gpa, gpa_t gpsz,
- unsigned long order);
-void kvm_riscv_hfence_gvma_vmid_all(struct kvm *kvm,
- unsigned long hbase, unsigned long hmask);
-void kvm_riscv_hfence_vvma_asid_gva(struct kvm *kvm,
- unsigned long hbase, unsigned long hmask,
- unsigned long gva, unsigned long gvsz,
- unsigned long order, unsigned long asid);
-void kvm_riscv_hfence_vvma_asid_all(struct kvm *kvm,
- unsigned long hbase, unsigned long hmask,
- unsigned long asid);
-void kvm_riscv_hfence_vvma_gva(struct kvm *kvm,
- unsigned long hbase, unsigned long hmask,
- unsigned long gva, unsigned long gvsz,
- unsigned long order);
-void kvm_riscv_hfence_vvma_all(struct kvm *kvm,
- unsigned long hbase, unsigned long hmask);
-
-int kvm_riscv_gstage_ioremap(struct kvm *kvm, gpa_t gpa,
- phys_addr_t hpa, unsigned long size,
- bool writable, bool in_atomic);
-void kvm_riscv_gstage_iounmap(struct kvm *kvm, gpa_t gpa,
- unsigned long size);
-int kvm_riscv_gstage_map(struct kvm_vcpu *vcpu,
- struct kvm_memory_slot *memslot,
- gpa_t gpa, unsigned long hva, bool is_write);
-int kvm_riscv_gstage_alloc_pgd(struct kvm *kvm);
-void kvm_riscv_gstage_free_pgd(struct kvm *kvm);
-void kvm_riscv_gstage_update_hgatp(struct kvm_vcpu *vcpu);
-void __init kvm_riscv_gstage_mode_detect(void);
-unsigned long __init kvm_riscv_gstage_mode(void);
-int kvm_riscv_gstage_gpa_bits(void);
-
-void __init kvm_riscv_gstage_vmid_detect(void);
-unsigned long kvm_riscv_gstage_vmid_bits(void);
-int kvm_riscv_gstage_vmid_init(struct kvm *kvm);
-bool kvm_riscv_gstage_vmid_ver_changed(struct kvm_vmid *vmid);
-void kvm_riscv_gstage_vmid_update(struct kvm_vcpu *vcpu);
-
int kvm_riscv_setup_default_irq_routing(struct kvm *kvm, u32 lines);
void __kvm_riscv_unpriv_trap(void);
@@ -415,7 +321,6 @@ void __kvm_riscv_vcpu_power_on(struct kvm_vcpu *vcpu);
void kvm_riscv_vcpu_power_on(struct kvm_vcpu *vcpu);
bool kvm_riscv_vcpu_stopped(struct kvm_vcpu *vcpu);
-void kvm_riscv_vcpu_sbi_sta_reset(struct kvm_vcpu *vcpu);
void kvm_riscv_vcpu_record_steal_time(struct kvm_vcpu *vcpu);
#endif /* __RISCV_KVM_HOST_H__ */
diff --git a/arch/riscv/include/asm/kvm_mmu.h b/arch/riscv/include/asm/kvm_mmu.h
new file mode 100644
index 000000000000..5439e76f0a96
--- /dev/null
+++ b/arch/riscv/include/asm/kvm_mmu.h
@@ -0,0 +1,21 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+/*
+ * Copyright (c) 2025 Ventana Micro Systems Inc.
+ */
+
+#ifndef __RISCV_KVM_MMU_H_
+#define __RISCV_KVM_MMU_H_
+
+#include <asm/kvm_gstage.h>
+
+int kvm_riscv_mmu_ioremap(struct kvm *kvm, gpa_t gpa, phys_addr_t hpa,
+ unsigned long size, bool writable, bool in_atomic);
+void kvm_riscv_mmu_iounmap(struct kvm *kvm, gpa_t gpa, unsigned long size);
+int kvm_riscv_mmu_map(struct kvm_vcpu *vcpu, struct kvm_memory_slot *memslot,
+ gpa_t gpa, unsigned long hva, bool is_write,
+ struct kvm_gstage_mapping *out_map);
+int kvm_riscv_mmu_alloc_pgd(struct kvm *kvm);
+void kvm_riscv_mmu_free_pgd(struct kvm *kvm);
+void kvm_riscv_mmu_update_hgatp(struct kvm_vcpu *vcpu);
+
+#endif
diff --git a/arch/riscv/include/asm/kvm_tlb.h b/arch/riscv/include/asm/kvm_tlb.h
new file mode 100644
index 000000000000..38a2f933ad3a
--- /dev/null
+++ b/arch/riscv/include/asm/kvm_tlb.h
@@ -0,0 +1,84 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+/*
+ * Copyright (c) 2025 Ventana Micro Systems Inc.
+ */
+
+#ifndef __RISCV_KVM_TLB_H_
+#define __RISCV_KVM_TLB_H_
+
+#include <linux/kvm_types.h>
+
+enum kvm_riscv_hfence_type {
+ KVM_RISCV_HFENCE_UNKNOWN = 0,
+ KVM_RISCV_HFENCE_GVMA_VMID_GPA,
+ KVM_RISCV_HFENCE_GVMA_VMID_ALL,
+ KVM_RISCV_HFENCE_VVMA_ASID_GVA,
+ KVM_RISCV_HFENCE_VVMA_ASID_ALL,
+ KVM_RISCV_HFENCE_VVMA_GVA,
+ KVM_RISCV_HFENCE_VVMA_ALL
+};
+
+struct kvm_riscv_hfence {
+ enum kvm_riscv_hfence_type type;
+ unsigned long asid;
+ unsigned long vmid;
+ unsigned long order;
+ gpa_t addr;
+ gpa_t size;
+};
+
+#define KVM_RISCV_VCPU_MAX_HFENCE 64
+
+#define KVM_RISCV_GSTAGE_TLB_MIN_ORDER 12
+
+void kvm_riscv_local_hfence_gvma_vmid_gpa(unsigned long vmid,
+ gpa_t gpa, gpa_t gpsz,
+ unsigned long order);
+void kvm_riscv_local_hfence_gvma_vmid_all(unsigned long vmid);
+void kvm_riscv_local_hfence_gvma_gpa(gpa_t gpa, gpa_t gpsz,
+ unsigned long order);
+void kvm_riscv_local_hfence_gvma_all(void);
+void kvm_riscv_local_hfence_vvma_asid_gva(unsigned long vmid,
+ unsigned long asid,
+ unsigned long gva,
+ unsigned long gvsz,
+ unsigned long order);
+void kvm_riscv_local_hfence_vvma_asid_all(unsigned long vmid,
+ unsigned long asid);
+void kvm_riscv_local_hfence_vvma_gva(unsigned long vmid,
+ unsigned long gva, unsigned long gvsz,
+ unsigned long order);
+void kvm_riscv_local_hfence_vvma_all(unsigned long vmid);
+
+void kvm_riscv_tlb_flush_process(struct kvm_vcpu *vcpu);
+
+void kvm_riscv_fence_i_process(struct kvm_vcpu *vcpu);
+void kvm_riscv_hfence_vvma_all_process(struct kvm_vcpu *vcpu);
+void kvm_riscv_hfence_process(struct kvm_vcpu *vcpu);
+
+void kvm_riscv_fence_i(struct kvm *kvm,
+ unsigned long hbase, unsigned long hmask);
+void kvm_riscv_hfence_gvma_vmid_gpa(struct kvm *kvm,
+ unsigned long hbase, unsigned long hmask,
+ gpa_t gpa, gpa_t gpsz,
+ unsigned long order, unsigned long vmid);
+void kvm_riscv_hfence_gvma_vmid_all(struct kvm *kvm,
+ unsigned long hbase, unsigned long hmask,
+ unsigned long vmid);
+void kvm_riscv_hfence_vvma_asid_gva(struct kvm *kvm,
+ unsigned long hbase, unsigned long hmask,
+ unsigned long gva, unsigned long gvsz,
+ unsigned long order, unsigned long asid,
+ unsigned long vmid);
+void kvm_riscv_hfence_vvma_asid_all(struct kvm *kvm,
+ unsigned long hbase, unsigned long hmask,
+ unsigned long asid, unsigned long vmid);
+void kvm_riscv_hfence_vvma_gva(struct kvm *kvm,
+ unsigned long hbase, unsigned long hmask,
+ unsigned long gva, unsigned long gvsz,
+ unsigned long order, unsigned long vmid);
+void kvm_riscv_hfence_vvma_all(struct kvm *kvm,
+ unsigned long hbase, unsigned long hmask,
+ unsigned long vmid);
+
+#endif
diff --git a/arch/riscv/include/asm/kvm_vcpu_sbi.h b/arch/riscv/include/asm/kvm_vcpu_sbi.h
index 439ab2b3534f..d678fd7e5973 100644
--- a/arch/riscv/include/asm/kvm_vcpu_sbi.h
+++ b/arch/riscv/include/asm/kvm_vcpu_sbi.h
@@ -49,6 +49,16 @@ struct kvm_vcpu_sbi_extension {
/* Extension specific probe function */
unsigned long (*probe)(struct kvm_vcpu *vcpu);
+
+ /*
+ * Init/deinit function called once during VCPU init/destroy. These
+ * might be use if the SBI extensions need to allocate or do specific
+ * init time only configuration.
+ */
+ int (*init)(struct kvm_vcpu *vcpu);
+ void (*deinit)(struct kvm_vcpu *vcpu);
+
+ void (*reset)(struct kvm_vcpu *vcpu);
};
void kvm_riscv_vcpu_sbi_forward(struct kvm_vcpu *vcpu, struct kvm_run *run);
@@ -72,6 +82,8 @@ const struct kvm_vcpu_sbi_extension *kvm_vcpu_sbi_find_ext(
bool riscv_vcpu_supports_sbi_ext(struct kvm_vcpu *vcpu, int idx);
int kvm_riscv_vcpu_sbi_ecall(struct kvm_vcpu *vcpu, struct kvm_run *run);
void kvm_riscv_vcpu_sbi_init(struct kvm_vcpu *vcpu);
+void kvm_riscv_vcpu_sbi_deinit(struct kvm_vcpu *vcpu);
+void kvm_riscv_vcpu_sbi_reset(struct kvm_vcpu *vcpu);
int kvm_riscv_vcpu_get_reg_sbi_sta(struct kvm_vcpu *vcpu, unsigned long reg_num,
unsigned long *reg_val);
diff --git a/arch/riscv/include/asm/kvm_vmid.h b/arch/riscv/include/asm/kvm_vmid.h
new file mode 100644
index 000000000000..ab98e1434fb7
--- /dev/null
+++ b/arch/riscv/include/asm/kvm_vmid.h
@@ -0,0 +1,27 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+/*
+ * Copyright (c) 2025 Ventana Micro Systems Inc.
+ */
+
+#ifndef __RISCV_KVM_VMID_H_
+#define __RISCV_KVM_VMID_H_
+
+#include <linux/kvm_types.h>
+
+struct kvm_vmid {
+ /*
+ * Writes to vmid_version and vmid happen with vmid_lock held
+ * whereas reads happen without any lock held.
+ */
+ unsigned long vmid_version;
+ unsigned long vmid;
+};
+
+void __init kvm_riscv_gstage_vmid_detect(void);
+unsigned long kvm_riscv_gstage_vmid_bits(void);
+int kvm_riscv_gstage_vmid_init(struct kvm *kvm);
+bool kvm_riscv_gstage_vmid_ver_changed(struct kvm_vmid *vmid);
+void kvm_riscv_gstage_vmid_update(struct kvm_vcpu *vcpu);
+void kvm_riscv_gstage_vmid_sanitize(struct kvm_vcpu *vcpu);
+
+#endif
generated by cgit (git 2.34.1) at 2025-07-31 14:38:50 +0000