RISC-V ISA Explorer · Single-Letter Extensions

H: Hypervisor

Ratified 2019-12 · version 1.0.0

A second stage of address translation and a guest privilege mode so hypervisors can host guest operating systems.

Typical use: Virtualization / VMs

Specification

Open H in the explorer

Dependencies

Requires

Required by

Instructions (18)

Mnemonic	Name	Encoding	Match	Mask
`HFENCE.GVMA`	Hypervisor fence guest-physical address	`0110001----------000000001110011`	`0x62000073`	`0xfe007fff`
`HFENCE.VVMA`	Hypervisor fence guest virtual address	`0010001----------000000001110011`	`0x22000073`	`0xfe007fff`
`HINVAL.GVMA`	Invalidate cached address translations	`0110011----------000000001110011`	`0x66000073`	`0xfe007fff`
`HINVAL.VVMA`	Invalidate cached address translations	`0010011----------000000001110011`	`0x26000073`	`0xfe007fff`
`HLV.B`	Hypervisor load byte	`011000000000-----100-----1110011`	`0x60004073`	`0xfff0707f`
`HLV.BU`	Hypervisor load byte unsigned	`011000000001-----100-----1110011`	`0x60104073`	`0xfff0707f`
`HLV.D`	Hypervisor load doubleword	`011011000000-----100-----1110011`	`0x6c004073`	`0xfff0707f`
`HLV.H`	Hypervisor load halfword	`011001000000-----100-----1110011`	`0x64004073`	`0xfff0707f`
`HLV.HU`	Hypervisor load halfword unsigned	`011001000001-----100-----1110011`	`0x64104073`	`0xfff0707f`
`HLV.W`	Hypervisor load word	`011010000000-----100-----1110011`	`0x68004073`	`0xfff0707f`
`HLV.WU`	Hypervisor load word unsigned	`011010000001-----100-----1110011`	`0x68104073`	`0xfff0707f`
`HLVX.HU`	Hypervisor load halfword unsigned, executable	`011001000011-----100-----1110011`	`0x64304073`	`0xfff0707f`
`HLVX.WU`	Hypervisor load word unsigned, executable	`011010000011-----100-----1110011`	`0x68304073`	`0xfff0707f`
`HRET`		`00100000001000000000000001110011`	`0x20200073`	`0xffffffff`
`HSV.B`	Hypervisor store byte	`0110001----------100000001110011`	`0x62004073`	`0xfe007fff`
`HSV.D`	Hypervisor store doubleword	`0110111----------100000001110011`	`0x6e004073`	`0xfe007fff`
`HSV.H`	Hypervisor store halfword	`0110011----------100000001110011`	`0x66004073`	`0xfe007fff`
`HSV.W`	Hypervisor store word	`0110101----------100000001110011`	`0x6a004073`	`0xfe007fff`

Control and status registers (28)

Name	Address	Mode	Description
`hcontext`	`0x6a8`	S	Hypervisor Context
`hcounteren`	`0x606`	S	Hypervisor Counter Enable
`hedeleg`	`0x602`	S	Hypervisor Exception Delegation
`hedelegh`	`0x612`	S	Hypervisor Exception Delegation High
`henvcfg`	`0x60a`	S	Hypervisor Environment Configuration
`henvcfgh`	`0x61a`	S	most-significant 32 bits of Hypervisor Environment Configuration
`hgatp`	`0x680`	S	Hypervisor guest address translation and protection
`hstateen0`	`0x60c`	S	Hypervisor State Enable 0 Register
`hstateen0h`	`0x61c`	S	Upper 32 bits of Hypervisor State Enable 0 Register
`hstateen1`	`0x60d`	S	Hypervisor State Enable 1 Register
`hstateen1h`	`0x61d`	S	Upper 32 bits of Hypervisor State Enable 1 Register
`hstateen2`	`0x60e`	S	Hypervisor State Enable 2 Register
`hstateen2h`	`0x61e`	S	Upper 32 bits of Hypervisor State Enable 2 Register
`hstateen3`	`0x60f`	S	Hypervisor State Enable 3 Register
`hstateen3h`	`0x61f`	S	Upper 32 bits of Hypervisor State Enable 3 Register
`hstatus`	`0x600`	S	Hypervisor Status
`htimedelta`	`0x605`	S	Hypervisor time delta
`htimedeltah`	`0x615`	S	Hypervisor time delta, upper half
`htinst`	`0x64a`	S	Hypervisor Trap Instruction Register
`htval`	`0x643`	M	Hypervisor Trap Value Register
`mtinst`	`0x34a`	M	Machine Trap Instruction Register
`mtval2`	`0x34b`	M	Machine Second Trap Value Register
`vsatp`	`0x280`	VS	Virtual Supervisor Address Translation and Protection
`vscause`	`0x242`	VS	Virtual Supervisor Cause
`vsepc`	`0x241`	VS	Virtual Supervisor Exception Program Counter
`vsstatus`	`0x200`	VS	Virtual Supervisor Status
`vstval`	`0x243`	S	Virtual supervisor Trap Value
`vstvec`	`0x205`	S	Supervisor Trap Vector