[PATCH v1 1/9] linux-headers: Add KVM headers for loongarch

[xianglai li]

From: zhaotianrui <zhaotianrui@loongson.cn>

Update linux KVM headers about LoongArch KVM form linux
kernel. Mainly contains some KVM structures and macro
defines such as LoongArch KVM registers number, LoongArch
fpu structure, exit reason of LoongArch IOCSR, etc.

Signed-off-by: zhaotianrui <zhaotianrui@loongson.cn>
Signed-off-by: xianglai li <lixianglai@loongson.cn>
---
 linux-headers/asm-loongarch/kvm.h | 108 ++++++++++++++++++++++++++++++
 linux-headers/linux/kvm.h         |   9 +++
 2 files changed, 117 insertions(+)
 create mode 100644 linux-headers/asm-loongarch/kvm.h

diff --git a/linux-headers/asm-loongarch/kvm.h 
b/linux-headers/asm-loongarch/kvm.h
new file mode 100644
index 0000000000..c6ad2ee610
--- /dev/null
+++ b/linux-headers/asm-loongarch/kvm.h
@@ -0,0 +1,108 @@
+/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
+/*
+ * Copyright (C) 2020-2023 Loongson Technology Corporation Limited
+ */
+
+#ifndef __UAPI_ASM_LOONGARCH_KVM_H
+#define __UAPI_ASM_LOONGARCH_KVM_H
+
+#include <linux/types.h>
+
+/*
+ * KVM LoongArch specific structures and definitions.
+ *
+ * Some parts derived from the x86 version of this file.
+ */
+
+#define __KVM_HAVE_READONLY_MEM
+
+#define KVM_COALESCED_MMIO_PAGE_OFFSET 1
+#define KVM_DIRTY_LOG_PAGE_OFFSET      64
+
+/*
+ * for KVM_GET_REGS and KVM_SET_REGS
+ */
+struct kvm_regs {
+       /* out (KVM_GET_REGS) / in (KVM_SET_REGS) */
+       __u64 gpr[32];
+       __u64 pc;
+};
+
+/*
+ * for KVM_GET_FPU and KVM_SET_FPU
+ */
+struct kvm_fpu {
+       __u32 fcsr;
+       __u64 fcc;    /* 8x8 */
+       struct kvm_fpureg {
+               __u64 val64[4];
+       } fpr[32];
+};
+
+/*
+ * For LoongArch, we use KVM_SET_ONE_REG and KVM_GET_ONE_REG to access various
+ * registers.  The id field is broken down as follows:
+ *
+ *  bits[63..52] - As per linux/kvm.h
+ *  bits[51..32] - Must be zero.
+ *  bits[31..16] - Register set.
+ *
+ * Register set = 0: GP registers from kvm_regs (see definitions below).
+ *
+ * Register set = 1: CSR registers.
+ *
+ * Register set = 2: KVM specific registers (see definitions below).
+ *
+ * Register set = 3: FPU / SIMD registers (see definitions below).
+ *
+ * Other sets registers may be added in the future.  Each set would
+ * have its own identifier in bits[31..16].
+ */
+
+#define KVM_REG_LOONGARCH_GPR          (KVM_REG_LOONGARCH | 0x00000ULL)
+#define KVM_REG_LOONGARCH_CSR          (KVM_REG_LOONGARCH | 0x10000ULL)
+#define KVM_REG_LOONGARCH_KVM          (KVM_REG_LOONGARCH | 0x20000ULL)
+#define KVM_REG_LOONGARCH_FPSIMD       (KVM_REG_LOONGARCH | 0x30000ULL)
+#define KVM_REG_LOONGARCH_CPUCFG       (KVM_REG_LOONGARCH | 0x40000ULL)
+#define KVM_REG_LOONGARCH_MASK         (KVM_REG_LOONGARCH | 0x70000ULL)
+#define KVM_CSR_IDX_MASK               0x7fff
+#define KVM_CPUCFG_IDX_MASK            0x7fff
+
+/*
+ * KVM_REG_LOONGARCH_KVM - KVM specific control registers.
+ */
+
+#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)
+
+#define LOONGARCH_REG_SHIFT            3
+#define LOONGARCH_REG_64(TYPE, REG)    (TYPE | KVM_REG_SIZE_U64 | (REG << 
LOONGARCH_REG_SHIFT))
+#define KVM_IOC_CSRID(REG)             LOONGARCH_REG_64(KVM_REG_LOONGARCH_CSR, 
REG)
+#define KVM_IOC_CPUCFG(REG)            
LOONGARCH_REG_64(KVM_REG_LOONGARCH_CPUCFG, REG)
+
+struct kvm_debug_exit_arch {
+};
+
+/* for KVM_SET_GUEST_DEBUG */
+struct kvm_guest_debug_arch {
+};
+
+/* definition of registers in kvm_run */
+struct kvm_sync_regs {
+};
+
+/* dummy definition */
+struct kvm_sregs {
+};
+
+struct kvm_iocsr_entry {
+       __u32 addr;
+       __u32 pad;
+       __u64 data;
+};
+
+#define KVM_NR_IRQCHIPS                1
+#define KVM_IRQCHIP_NUM_PINS   64
+#define KVM_MAX_CORES          256
+
+#endif /* __UAPI_ASM_LOONGARCH_KVM_H */
diff --git a/linux-headers/linux/kvm.h b/linux-headers/linux/kvm.h
index 0d74ee999a..0e378bbcbf 100644
--- a/linux-headers/linux/kvm.h
+++ b/linux-headers/linux/kvm.h
@@ -264,6 +264,7 @@ struct kvm_xen_exit {
 #define KVM_EXIT_RISCV_SBI        35
 #define KVM_EXIT_RISCV_CSR        36
 #define KVM_EXIT_NOTIFY           37
+#define KVM_EXIT_LOONGARCH_IOCSR  38
 
 /* For KVM_EXIT_INTERNAL_ERROR */
 /* Emulate instruction failed. */
@@ -336,6 +337,13 @@ struct kvm_run {
                        __u32 len;
                        __u8  is_write;
                } mmio;
+               /* KVM_EXIT_LOONGARCH_IOCSR */
+               struct {
+                       __u64 phys_addr;
+                       __u8  data[8];
+                       __u32 len;
+                       __u8  is_write;
+               } iocsr_io;
                /* KVM_EXIT_HYPERCALL */
                struct {
                        __u64 nr;
@@ -1358,6 +1366,7 @@ struct kvm_dirty_tlb {
 #define KVM_REG_ARM64          0x6000000000000000ULL
 #define KVM_REG_MIPS           0x7000000000000000ULL
 #define KVM_REG_RISCV          0x8000000000000000ULL
+#define KVM_REG_LOONGARCH      0x9000000000000000ULL
 
 #define KVM_REG_SIZE_SHIFT     52
 #define KVM_REG_SIZE_MASK      0x00f0000000000000ULL
-- 
2.39.1