Currently, patchset 1 is already merged into mainline kernel in v6.4-rc1 and
patchset 2 is not.
Signed-off-by: Yong-Xuan Wang <yongxuan.wang@sifive.com>
Reviewed-by: Jim Shu <jim.shu@sifive.com>
---
linux-headers/asm-riscv/kvm.h | 123 +++++++++++++++++++++++++++++++++-
linux-headers/linux/kvm.h | 2 +
2 files changed, 124 insertions(+), 1 deletion(-)
diff --git a/linux-headers/asm-riscv/kvm.h b/linux-headers/asm-riscv/kvm.h
index 92af6f3f05..a16ca62419 100644
--- a/linux-headers/asm-riscv/kvm.h
+++ b/linux-headers/asm-riscv/kvm.h
@@ -12,8 +12,10 @@
#ifndef __ASSEMBLY__
#include <linux/types.h>
+#include <asm/bitsperlong.h>
#include <asm/ptrace.h>
+#define __KVM_HAVE_IRQ_LINE
#define __KVM_HAVE_READONLY_MEM
#define KVM_COALESCED_MMIO_PAGE_OFFSET 1
@@ -64,7 +66,7 @@ struct kvm_riscv_core {
#define KVM_RISCV_MODE_S 1
#define KVM_RISCV_MODE_U 0
-/* CSR registers for KVM_GET_ONE_REG and KVM_SET_ONE_REG */
+/* General CSR registers for KVM_GET_ONE_REG and KVM_SET_ONE_REG */
struct kvm_riscv_csr {
unsigned long sstatus;
unsigned long sie;
@@ -78,6 +80,17 @@ struct kvm_riscv_csr {
unsigned long scounteren;
};
+/* AIA CSR registers for KVM_GET_ONE_REG and KVM_SET_ONE_REG */
+struct kvm_riscv_aia_csr {
+ unsigned long siselect;
+ unsigned long iprio1;
+ unsigned long iprio2;
+ unsigned long sieh;
+ unsigned long siph;
+ unsigned long iprio1h;
+ unsigned long iprio2h;
+};
+
/* TIMER registers for KVM_GET_ONE_REG and KVM_SET_ONE_REG */
struct kvm_riscv_timer {
__u64 frequency;
@@ -105,9 +118,28 @@ enum KVM_RISCV_ISA_EXT_ID {
KVM_RISCV_ISA_EXT_SVINVAL,
KVM_RISCV_ISA_EXT_ZIHINTPAUSE,
KVM_RISCV_ISA_EXT_ZICBOM,
+ KVM_RISCV_ISA_EXT_ZBB,
+ KVM_RISCV_ISA_EXT_SSAIA,
KVM_RISCV_ISA_EXT_MAX,
};
+/*
+ * SBI extension IDs specific to KVM. This is not the same as the SBI
+ * extension IDs defined by the RISC-V SBI specification.
+ */
+enum KVM_RISCV_SBI_EXT_ID {
+ KVM_RISCV_SBI_EXT_V01 = 0,
+ KVM_RISCV_SBI_EXT_TIME,
+ KVM_RISCV_SBI_EXT_IPI,
+ KVM_RISCV_SBI_EXT_RFENCE,
+ KVM_RISCV_SBI_EXT_SRST,
+ KVM_RISCV_SBI_EXT_HSM,
+ KVM_RISCV_SBI_EXT_PMU,
+ KVM_RISCV_SBI_EXT_EXPERIMENTAL,
+ KVM_RISCV_SBI_EXT_VENDOR,
+ KVM_RISCV_SBI_EXT_MAX,
+};
+
/* Possible states for kvm_riscv_timer */
#define KVM_RISCV_TIMER_STATE_OFF 0
#define KVM_RISCV_TIMER_STATE_ON 1
@@ -118,6 +150,8 @@ enum KVM_RISCV_ISA_EXT_ID {
/* If you need to interpret the index values, here is the key: */
#define KVM_REG_RISCV_TYPE_MASK 0x00000000FF000000
#define KVM_REG_RISCV_TYPE_SHIFT 24
+#define KVM_REG_RISCV_SUBTYPE_MASK 0x0000000000FF0000
+#define KVM_REG_RISCV_SUBTYPE_SHIFT 16
/* Config registers are mapped as type 1 */
#define KVM_REG_RISCV_CONFIG (0x01 << KVM_REG_RISCV_TYPE_SHIFT)
@@ -131,8 +165,12 @@ enum KVM_RISCV_ISA_EXT_ID {
/* Control and status registers are mapped as type 3 */
#define KVM_REG_RISCV_CSR (0x03 << KVM_REG_RISCV_TYPE_SHIFT)
+#define KVM_REG_RISCV_CSR_GENERAL (0x0 << KVM_REG_RISCV_SUBTYPE_SHIFT)
+#define KVM_REG_RISCV_CSR_AIA (0x1 << KVM_REG_RISCV_SUBTYPE_SHIFT)
#define KVM_REG_RISCV_CSR_REG(name) \
(offsetof(struct kvm_riscv_csr, name) / sizeof(unsigned long))
+#define KVM_REG_RISCV_CSR_AIA_REG(name) \
+ (offsetof(struct kvm_riscv_aia_csr, name) / sizeof(unsigned long))
/* Timer registers are mapped as type 4 */
#define KVM_REG_RISCV_TIMER (0x04 << KVM_REG_RISCV_TYPE_SHIFT)
@@ -152,6 +190,89 @@ enum KVM_RISCV_ISA_EXT_ID {
/* ISA Extension registers are mapped as type 7 */
#define KVM_REG_RISCV_ISA_EXT (0x07 << KVM_REG_RISCV_TYPE_SHIFT)
+/* SBI extension registers are mapped as type 8 */
+#define KVM_REG_RISCV_SBI_EXT (0x08 << KVM_REG_RISCV_TYPE_SHIFT)
+#define KVM_REG_RISCV_SBI_SINGLE (0x0 << KVM_REG_RISCV_SUBTYPE_SHIFT)
+#define KVM_REG_RISCV_SBI_MULTI_EN (0x1 << KVM_REG_RISCV_SUBTYPE_SHIFT)
+#define KVM_REG_RISCV_SBI_MULTI_DIS (0x2 << KVM_REG_RISCV_SUBTYPE_SHIFT)
+#define KVM_REG_RISCV_SBI_MULTI_REG(__ext_id) \
+ ((__ext_id) / __BITS_PER_LONG)
+#define KVM_REG_RISCV_SBI_MULTI_MASK(__ext_id) \
+ (1UL << ((__ext_id) % __BITS_PER_LONG))
+#define KVM_REG_RISCV_SBI_MULTI_REG_LAST \
+ KVM_REG_RISCV_SBI_MULTI_REG(KVM_RISCV_SBI_EXT_MAX - 1)
+
+/* Device Control API: RISC-V AIA */
+#define KVM_DEV_RISCV_APLIC_ALIGN 0x1000
+#define KVM_DEV_RISCV_APLIC_SIZE 0x4000
+#define KVM_DEV_RISCV_APLIC_MAX_HARTS 0x4000
+#define KVM_DEV_RISCV_IMSIC_ALIGN 0x1000
+#define KVM_DEV_RISCV_IMSIC_SIZE 0x1000
+
+#define KVM_DEV_RISCV_AIA_GRP_CONFIG 0
+#define KVM_DEV_RISCV_AIA_CONFIG_MODE 0
+#define KVM_DEV_RISCV_AIA_CONFIG_IDS 1
+#define KVM_DEV_RISCV_AIA_CONFIG_SRCS 2
+#define KVM_DEV_RISCV_AIA_CONFIG_GROUP_BITS 3
+#define KVM_DEV_RISCV_AIA_CONFIG_GROUP_SHIFT 4
+#define KVM_DEV_RISCV_AIA_CONFIG_HART_BITS 5
+#define KVM_DEV_RISCV_AIA_CONFIG_GUEST_BITS 6
+
+/*
+ * Modes of RISC-V AIA device:
+ * 1) EMUL (aka Emulation): Trap-n-emulate IMSIC
+ * 2) HWACCEL (aka HW Acceleration): Virtualize IMSIC using IMSIC guest files
+ * 3) AUTO (aka Automatic): Virtualize IMSIC using IMSIC guest files whenever
+ * available otherwise fallback to trap-n-emulation
+ */
+#define KVM_DEV_RISCV_AIA_MODE_EMUL 0
+#define KVM_DEV_RISCV_AIA_MODE_HWACCEL 1
+#define KVM_DEV_RISCV_AIA_MODE_AUTO 2
+
+#define KVM_DEV_RISCV_AIA_IDS_MIN 63
+#define KVM_DEV_RISCV_AIA_IDS_MAX 2048
+#define KVM_DEV_RISCV_AIA_SRCS_MAX 1024
+#define KVM_DEV_RISCV_AIA_GROUP_BITS_MAX 8
+#define KVM_DEV_RISCV_AIA_GROUP_SHIFT_MIN 24
+#define KVM_DEV_RISCV_AIA_GROUP_SHIFT_MAX 56
+#define KVM_DEV_RISCV_AIA_HART_BITS_MAX 16
+#define KVM_DEV_RISCV_AIA_GUEST_BITS_MAX 8
+
+#define KVM_DEV_RISCV_AIA_GRP_ADDR 1
+#define KVM_DEV_RISCV_AIA_ADDR_APLIC 0
+#define KVM_DEV_RISCV_AIA_ADDR_IMSIC(__vcpu) (1 + (__vcpu))
+#define KVM_DEV_RISCV_AIA_ADDR_MAX \
+ (1 + KVM_DEV_RISCV_APLIC_MAX_HARTS)
+
+#define KVM_DEV_RISCV_AIA_GRP_CTRL 2
+#define KVM_DEV_RISCV_AIA_CTRL_INIT 0
+
+/*
+ * The device attribute type contains the memory mapped offset of the
+ * APLIC register (range 0x0000-0x3FFF) and it must be 4-byte aligned.
+ */
+#define KVM_DEV_RISCV_AIA_GRP_APLIC 3
+
+/*
+ * The lower 12-bits of the device attribute type contains the iselect
+ * value of the IMSIC register (range 0x70-0xFF) whereas the higher order
+ * bits contains the VCPU id.
+ */
+#define KVM_DEV_RISCV_AIA_GRP_IMSIC 4
+#define KVM_DEV_RISCV_AIA_IMSIC_ISEL_BITS 12
+#define KVM_DEV_RISCV_AIA_IMSIC_ISEL_MASK \
+ ((1U << KVM_DEV_RISCV_AIA_IMSIC_ISEL_BITS) - 1)
+#define KVM_DEV_RISCV_AIA_IMSIC_MKATTR(__vcpu, __isel) \
+ (((__vcpu) << KVM_DEV_RISCV_AIA_IMSIC_ISEL_BITS) | \
+ ((__isel) & KVM_DEV_RISCV_AIA_IMSIC_ISEL_MASK))
+#define KVM_DEV_RISCV_AIA_IMSIC_GET_ISEL(__attr) \
+ ((__attr) & KVM_DEV_RISCV_AIA_IMSIC_ISEL_MASK)
+#define KVM_DEV_RISCV_AIA_IMSIC_GET_VCPU(__attr) \
+ ((__attr) >> KVM_DEV_RISCV_AIA_IMSIC_ISEL_BITS)
+
+/* One single KVM irqchip, ie. the AIA */
+#define KVM_NR_IRQCHIPS 1
+
#endif
#endif /* __LINUX_KVM_RISCV_H */
diff --git a/linux-headers/linux/kvm.h b/linux-headers/linux/kvm.h
index 599de3c6e3..a9a4f5791d 100644
--- a/linux-headers/linux/kvm.h
+++ b/linux-headers/linux/kvm.h
@@ -1434,6 +1434,8 @@ enum kvm_device_type {
#define KVM_DEV_TYPE_XIVE KVM_DEV_TYPE_XIVE
KVM_DEV_TYPE_ARM_PV_TIME,
#define KVM_DEV_TYPE_ARM_PV_TIME KVM_DEV_TYPE_ARM_PV_TIME
+ KVM_DEV_TYPE_RISCV_AIA,
+#define KVM_DEV_TYPE_RISCV_AIA KVM_DEV_TYPE_RISCV_AIA
KVM_DEV_TYPE_MAX,
};