hie

Hypervisor Interrupt Enable Register

The hie register is a read/write register in HS-mode that enables interrupts. It corresponds to the enable bits for VS-level and hypervisor-specific interrupts, and supplements the HS-level sie register.

Attributes

Requirement

Defining extensions

H	Hypervisor

CSR Address

0x604

Length

* 32 when CSR[mstatus].SXL == 0 * 64 when CSR[mstatus].SXL == 1

Privilege Mode

Format

This CSR format changes dynamically.

Figure 1. hie Format when CSR[mstatus].SXL == 0

Figure 2. hie Format when CSR[mstatus].SXL == 1

Field Summary

Name	Location	Type	Reset Value
hie.SGEIE	12	RW	UNDEFINED_LEGAL
hie.VSEIE	10	RW	UNDEFINED_LEGAL
hie.VSTIE	6	RW	UNDEFINED_LEGAL
hie.VSSIE	2	RW	UNDEFINED_LEGAL

Name

Location

Type

Reset Value

UNDEFINED_LEGAL

UNDEFINED_LEGAL

UNDEFINED_LEGAL

UNDEFINED_LEGAL

Fields

`SGEIE`

Location: 12
Description: Hypervisor guest external interrupt enable bit. When set, allows external interrupts to be delivered to VS-mode based on the hgeie setting.
Type: RW
Reset value: UNDEFINED_LEGAL

`VSEIE`

Location: 10
Description: VS-level external interrupt enable bit. When set, allows external interrupts directed to VS-level to be processed based on the configuration in hvip and other platform-specific sources.
Type: RW
Reset value: UNDEFINED_LEGAL

`VSTIE`

Location: 6
Description: VS-level timer interrupt enable bit. When set, allows VS-level timer interrupts to be processed based on the hvip configuration and any platform-specific timer interrupts.
Type: RW
Reset value: UNDEFINED_LEGAL

`VSSIE`

Location: 2
Description: VS-level software interrupt enable bit. When set, allows software interrupts directed to VS-level to be processed, based on the configuration in hvip.
Type: RW
Reset value: UNDEFINED_LEGAL

Software write

This CSR may store a value that is different from what software attempts to write.

When a software write occurs (e.g., through csrrw), the following determines the written value:

SGEIE = if (CSR[mideleg].SGEI == 0) {
  return 0;
}
return csr_value.SGEIE;

VSEIE = if (CSR[mideleg].VSEI == 0) {
  return 0;
}
return csr_value.VSEIE;

VSTIE = if (CSR[mideleg].VSTI == 0) {
  return 0;
}
return csr_value.VSTIE;

VSSIE = if (CSR[mideleg].VSSI == 0) {
  return 0;
}
return csr_value.VSSIE;