Gsrr1 - Guest Save/Restore Register 1 - IBM A2 User Manual

14.5.41 GSRR1 - Guest Save/Restore Register 1

Register Short Name:
Decimal SPR Number:
Initial Value:
Slow SPR:
Guest Supervisor Mapping:
Bits Field Name
32 CM
33:34 ///
35 GS
36 ///
37 UCLE
38 SPV
39:45 ///
46 CE
47 ///
48 EE
49 PR
Version 1.3
October 23, 2012
GSRR1
379
0x0000000000000000
N
Y
Initial
Value
0b0 Computation Mode
0 The processor runs in 32-bit mode.
1 The processor runs in 64-bit mode.
0b00 Reserved
0b0 Guest State
When set, indicates that the processor is running in the guest state under the control of an
hypervisor program.
0 The processor is not running in the guest state.
1 The processor is running in the guest state.
0b0 Reserved
0b0 User Cache Locking Enable
0 Cache locking instructions are privileged.
1 Cache locking instructions can be executed in user mode (MSR[PR] = 1).
0b0 Vector Available
0 The processor cannot execute any vector instruction.
1 The processor can execute vector instructions.
0x0 Reserved
0b0 Critical Enable
0 Critical input, watchdog timer, and processor doorbell critical interrupts are dis-
abled.
1 Critical input, watchdog timer, and processor doorbell critical interrupts are
enabled.
0b0 Reserved
0b0 External Enable
0 External input, decrementer, fixed-interval timer, processor doorbell, guest proces-
sor doorbell, and performance monitor interrupts are disabled.
1 External input, decrementer, fixed-interval timer, processor doorbell, guest proces-
sor doorbell, and performance monitor interrupts are enabled.
When an interrupt masked by MSR[EE] is directed to the hypervisor state, the interrupt is
enabled if MSR[EE] = 1 or MSR[GS] = 1 except for the guest processor doorbell, which is
enabled if MSR[EE] = 1 and MSR[GS] = 1.
When an interrupt masked by MSR[EE] is directed to the guest state, the interrupt is
enabled if MSR[EE] = 1 and MSR[GS] = 1.
0b0 Problem State
0 The processor is in supervisor mode, can execute any instruction, and can access
any resource (that is, GPRs, SPRs, MSR, and so forth).
1 The processor is in user mode, cannot execute any privileged instruction, and
cannot access any privileged resource.
Read Access:
Write Access:
Duplicated for Multithread:
Notes:
Scan Ring:
Description
User's Manual
A2 Processor
Priv
Priv
Y
HM
func
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