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-rw-r--r--arch/riscv/include/asm/csr.h16
-rw-r--r--arch/riscv/include/asm/kvm_host.h24
-rw-r--r--arch/riscv/include/asm/kvm_vcpu_fp.h8
-rw-r--r--arch/riscv/include/asm/kvm_vcpu_insn.h48
-rw-r--r--arch/riscv/include/asm/kvm_vcpu_timer.h2
-rw-r--r--arch/riscv/include/uapi/asm/kvm.h1
6 files changed, 83 insertions, 16 deletions
diff --git a/arch/riscv/include/asm/csr.h b/arch/riscv/include/asm/csr.h
index 6d85655e7edf..17516afc389a 100644
--- a/arch/riscv/include/asm/csr.h
+++ b/arch/riscv/include/asm/csr.h
@@ -156,6 +156,18 @@
(_AC(1, UL) << IRQ_S_TIMER) | \
(_AC(1, UL) << IRQ_S_EXT))
+/* xENVCFG flags */
+#define ENVCFG_STCE (_AC(1, ULL) << 63)
+#define ENVCFG_PBMTE (_AC(1, ULL) << 62)
+#define ENVCFG_CBZE (_AC(1, UL) << 7)
+#define ENVCFG_CBCFE (_AC(1, UL) << 6)
+#define ENVCFG_CBIE_SHIFT 4
+#define ENVCFG_CBIE (_AC(0x3, UL) << ENVCFG_CBIE_SHIFT)
+#define ENVCFG_CBIE_ILL _AC(0x0, UL)
+#define ENVCFG_CBIE_FLUSH _AC(0x1, UL)
+#define ENVCFG_CBIE_INV _AC(0x3, UL)
+#define ENVCFG_FIOM _AC(0x1, UL)
+
/* symbolic CSR names: */
#define CSR_CYCLE 0xc00
#define CSR_TIME 0xc01
@@ -252,7 +264,9 @@
#define CSR_HTIMEDELTA 0x605
#define CSR_HCOUNTEREN 0x606
#define CSR_HGEIE 0x607
+#define CSR_HENVCFG 0x60a
#define CSR_HTIMEDELTAH 0x615
+#define CSR_HENVCFGH 0x61a
#define CSR_HTVAL 0x643
#define CSR_HIP 0x644
#define CSR_HVIP 0x645
@@ -264,6 +278,8 @@
#define CSR_MISA 0x301
#define CSR_MIE 0x304
#define CSR_MTVEC 0x305
+#define CSR_MENVCFG 0x30a
+#define CSR_MENVCFGH 0x31a
#define CSR_MSCRATCH 0x340
#define CSR_MEPC 0x341
#define CSR_MCAUSE 0x342
diff --git a/arch/riscv/include/asm/kvm_host.h b/arch/riscv/include/asm/kvm_host.h
index 319c8aeb42af..60c517e4d576 100644
--- a/arch/riscv/include/asm/kvm_host.h
+++ b/arch/riscv/include/asm/kvm_host.h
@@ -14,7 +14,9 @@
#include <linux/kvm_types.h>
#include <linux/spinlock.h>
#include <asm/csr.h>
+#include <asm/hwcap.h>
#include <asm/kvm_vcpu_fp.h>
+#include <asm/kvm_vcpu_insn.h>
#include <asm/kvm_vcpu_timer.h>
#define KVM_MAX_VCPUS 1024
@@ -63,6 +65,8 @@ struct kvm_vcpu_stat {
u64 wfi_exit_stat;
u64 mmio_exit_user;
u64 mmio_exit_kernel;
+ u64 csr_exit_user;
+ u64 csr_exit_kernel;
u64 exits;
};
@@ -90,14 +94,6 @@ struct kvm_arch {
struct kvm_guest_timer timer;
};
-struct kvm_mmio_decode {
- unsigned long insn;
- int insn_len;
- int len;
- int shift;
- int return_handled;
-};
-
struct kvm_sbi_context {
int return_handled;
};
@@ -170,7 +166,7 @@ struct kvm_vcpu_arch {
int last_exit_cpu;
/* ISA feature bits (similar to MISA) */
- unsigned long isa;
+ DECLARE_BITMAP(isa, RISCV_ISA_EXT_MAX);
/* SSCRATCH, STVEC, and SCOUNTEREN of Host */
unsigned long host_sscratch;
@@ -216,6 +212,9 @@ struct kvm_vcpu_arch {
/* MMIO instruction details */
struct kvm_mmio_decode mmio_decode;
+ /* CSR instruction details */
+ struct kvm_csr_decode csr_decode;
+
/* SBI context */
struct kvm_sbi_context sbi_context;
@@ -285,6 +284,11 @@ void kvm_riscv_hfence_vvma_gva(struct kvm *kvm,
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);
@@ -303,14 +307,12 @@ void kvm_riscv_gstage_vmid_update(struct kvm_vcpu *vcpu);
void __kvm_riscv_unpriv_trap(void);
-void kvm_riscv_vcpu_wfi(struct kvm_vcpu *vcpu);
unsigned long kvm_riscv_vcpu_unpriv_read(struct kvm_vcpu *vcpu,
bool read_insn,
unsigned long guest_addr,
struct kvm_cpu_trap *trap);
void kvm_riscv_vcpu_trap_redirect(struct kvm_vcpu *vcpu,
struct kvm_cpu_trap *trap);
-int kvm_riscv_vcpu_mmio_return(struct kvm_vcpu *vcpu, struct kvm_run *run);
int kvm_riscv_vcpu_exit(struct kvm_vcpu *vcpu, struct kvm_run *run,
struct kvm_cpu_trap *trap);
diff --git a/arch/riscv/include/asm/kvm_vcpu_fp.h b/arch/riscv/include/asm/kvm_vcpu_fp.h
index 4da9b8e0f050..b5540147409f 100644
--- a/arch/riscv/include/asm/kvm_vcpu_fp.h
+++ b/arch/riscv/include/asm/kvm_vcpu_fp.h
@@ -22,9 +22,9 @@ void __kvm_riscv_fp_d_restore(struct kvm_cpu_context *context);
void kvm_riscv_vcpu_fp_reset(struct kvm_vcpu *vcpu);
void kvm_riscv_vcpu_guest_fp_save(struct kvm_cpu_context *cntx,
- unsigned long isa);
+ const unsigned long *isa);
void kvm_riscv_vcpu_guest_fp_restore(struct kvm_cpu_context *cntx,
- unsigned long isa);
+ const unsigned long *isa);
void kvm_riscv_vcpu_host_fp_save(struct kvm_cpu_context *cntx);
void kvm_riscv_vcpu_host_fp_restore(struct kvm_cpu_context *cntx);
#else
@@ -32,12 +32,12 @@ static inline void kvm_riscv_vcpu_fp_reset(struct kvm_vcpu *vcpu)
{
}
static inline void kvm_riscv_vcpu_guest_fp_save(struct kvm_cpu_context *cntx,
- unsigned long isa)
+ const unsigned long *isa)
{
}
static inline void kvm_riscv_vcpu_guest_fp_restore(
struct kvm_cpu_context *cntx,
- unsigned long isa)
+ const unsigned long *isa)
{
}
static inline void kvm_riscv_vcpu_host_fp_save(struct kvm_cpu_context *cntx)
diff --git a/arch/riscv/include/asm/kvm_vcpu_insn.h b/arch/riscv/include/asm/kvm_vcpu_insn.h
new file mode 100644
index 000000000000..350011c83581
--- /dev/null
+++ b/arch/riscv/include/asm/kvm_vcpu_insn.h
@@ -0,0 +1,48 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+/*
+ * Copyright (c) 2022 Ventana Micro Systems Inc.
+ */
+
+#ifndef __KVM_VCPU_RISCV_INSN_H
+#define __KVM_VCPU_RISCV_INSN_H
+
+struct kvm_vcpu;
+struct kvm_run;
+struct kvm_cpu_trap;
+
+struct kvm_mmio_decode {
+ unsigned long insn;
+ int insn_len;
+ int len;
+ int shift;
+ int return_handled;
+};
+
+struct kvm_csr_decode {
+ unsigned long insn;
+ int return_handled;
+};
+
+/* Return values used by function emulating a particular instruction */
+enum kvm_insn_return {
+ KVM_INSN_EXIT_TO_USER_SPACE = 0,
+ KVM_INSN_CONTINUE_NEXT_SEPC,
+ KVM_INSN_CONTINUE_SAME_SEPC,
+ KVM_INSN_ILLEGAL_TRAP,
+ KVM_INSN_VIRTUAL_TRAP
+};
+
+void kvm_riscv_vcpu_wfi(struct kvm_vcpu *vcpu);
+int kvm_riscv_vcpu_csr_return(struct kvm_vcpu *vcpu, struct kvm_run *run);
+int kvm_riscv_vcpu_virtual_insn(struct kvm_vcpu *vcpu, struct kvm_run *run,
+ struct kvm_cpu_trap *trap);
+
+int kvm_riscv_vcpu_mmio_load(struct kvm_vcpu *vcpu, struct kvm_run *run,
+ unsigned long fault_addr,
+ unsigned long htinst);
+int kvm_riscv_vcpu_mmio_store(struct kvm_vcpu *vcpu, struct kvm_run *run,
+ unsigned long fault_addr,
+ unsigned long htinst);
+int kvm_riscv_vcpu_mmio_return(struct kvm_vcpu *vcpu, struct kvm_run *run);
+
+#endif
diff --git a/arch/riscv/include/asm/kvm_vcpu_timer.h b/arch/riscv/include/asm/kvm_vcpu_timer.h
index 375281eb49e0..50138e2eb91b 100644
--- a/arch/riscv/include/asm/kvm_vcpu_timer.h
+++ b/arch/riscv/include/asm/kvm_vcpu_timer.h
@@ -39,6 +39,6 @@ int kvm_riscv_vcpu_timer_init(struct kvm_vcpu *vcpu);
int kvm_riscv_vcpu_timer_deinit(struct kvm_vcpu *vcpu);
int kvm_riscv_vcpu_timer_reset(struct kvm_vcpu *vcpu);
void kvm_riscv_vcpu_timer_restore(struct kvm_vcpu *vcpu);
-int kvm_riscv_guest_timer_init(struct kvm *kvm);
+void kvm_riscv_guest_timer_init(struct kvm *kvm);
#endif
diff --git a/arch/riscv/include/uapi/asm/kvm.h b/arch/riscv/include/uapi/asm/kvm.h
index 6119368ba6d5..24b2a6e27698 100644
--- a/arch/riscv/include/uapi/asm/kvm.h
+++ b/arch/riscv/include/uapi/asm/kvm.h
@@ -96,6 +96,7 @@ enum KVM_RISCV_ISA_EXT_ID {
KVM_RISCV_ISA_EXT_H,
KVM_RISCV_ISA_EXT_I,
KVM_RISCV_ISA_EXT_M,
+ KVM_RISCV_ISA_EXT_SVPBMT,
KVM_RISCV_ISA_EXT_MAX,
};
generated by cgit v1.2.3 (git 2.39.0) at 2024-08-31 10:56:51 +0300