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-rw-r--r--Documentation/virtual/kvm/api.txt345
1 files changed, 217 insertions, 128 deletions
diff --git a/Documentation/virtual/kvm/api.txt b/Documentation/virtual/kvm/api.txt
index 0fe36497642..68cda1fc3d5 100644
--- a/Documentation/virtual/kvm/api.txt
+++ b/Documentation/virtual/kvm/api.txt
@@ -297,6 +297,15 @@ struct kvm_regs {
__u64 rip, rflags;
};
+/* mips */
+struct kvm_regs {
+ /* out (KVM_GET_REGS) / in (KVM_SET_REGS) */
+ __u64 gpr[32];
+ __u64 hi;
+ __u64 lo;
+ __u64 pc;
+};
+
4.12 KVM_SET_REGS
@@ -378,7 +387,7 @@ struct kvm_translation {
4.16 KVM_INTERRUPT
Capability: basic
-Architectures: x86, ppc
+Architectures: x86, ppc, mips
Type: vcpu ioctl
Parameters: struct kvm_interrupt (in)
Returns: 0 on success, -1 on error
@@ -423,6 +432,11 @@ c) KVM_INTERRUPT_SET_LEVEL
Note that any value for 'irq' other than the ones stated above is invalid
and incurs unexpected behavior.
+MIPS:
+
+Queues an external interrupt to be injected into the virtual CPU. A negative
+interrupt number dequeues the interrupt.
+
4.17 KVM_DEBUG_GUEST
@@ -512,7 +526,7 @@ struct kvm_cpuid {
4.21 KVM_SET_SIGNAL_MASK
Capability: basic
-Architectures: x86
+Architectures: all
Type: vcpu ioctl
Parameters: struct kvm_signal_mask (in)
Returns: 0 on success, -1 on error
@@ -974,7 +988,7 @@ for vm-wide capabilities.
4.38 KVM_GET_MP_STATE
Capability: KVM_CAP_MP_STATE
-Architectures: x86, ia64
+Architectures: x86, ia64, s390
Type: vcpu ioctl
Parameters: struct kvm_mp_state (out)
Returns: 0 on success; -1 on error
@@ -988,24 +1002,32 @@ uniprocessor guests).
Possible values are:
- - KVM_MP_STATE_RUNNABLE: the vcpu is currently running
+ - KVM_MP_STATE_RUNNABLE: the vcpu is currently running [x86, ia64]
- KVM_MP_STATE_UNINITIALIZED: the vcpu is an application processor (AP)
- which has not yet received an INIT signal
+ which has not yet received an INIT signal [x86,
+ ia64]
- KVM_MP_STATE_INIT_RECEIVED: the vcpu has received an INIT signal, and is
- now ready for a SIPI
+ now ready for a SIPI [x86, ia64]
- KVM_MP_STATE_HALTED: the vcpu has executed a HLT instruction and
- is waiting for an interrupt
+ is waiting for an interrupt [x86, ia64]
- KVM_MP_STATE_SIPI_RECEIVED: the vcpu has just received a SIPI (vector
- accessible via KVM_GET_VCPU_EVENTS)
+ accessible via KVM_GET_VCPU_EVENTS) [x86, ia64]
+ - KVM_MP_STATE_STOPPED: the vcpu is stopped [s390]
+ - KVM_MP_STATE_CHECK_STOP: the vcpu is in a special error state [s390]
+ - KVM_MP_STATE_OPERATING: the vcpu is operating (running or halted)
+ [s390]
+ - KVM_MP_STATE_LOAD: the vcpu is in a special load/startup state
+ [s390]
-This ioctl is only useful after KVM_CREATE_IRQCHIP. Without an in-kernel
-irqchip, the multiprocessing state must be maintained by userspace.
+On x86 and ia64, this ioctl is only useful after KVM_CREATE_IRQCHIP. Without an
+in-kernel irqchip, the multiprocessing state must be maintained by userspace on
+these architectures.
4.39 KVM_SET_MP_STATE
Capability: KVM_CAP_MP_STATE
-Architectures: x86, ia64
+Architectures: x86, ia64, s390
Type: vcpu ioctl
Parameters: struct kvm_mp_state (in)
Returns: 0 on success; -1 on error
@@ -1013,8 +1035,9 @@ Returns: 0 on success; -1 on error
Sets the vcpu's current "multiprocessing state"; see KVM_GET_MP_STATE for
arguments.
-This ioctl is only useful after KVM_CREATE_IRQCHIP. Without an in-kernel
-irqchip, the multiprocessing state must be maintained by userspace.
+On x86 and ia64, this ioctl is only useful after KVM_CREATE_IRQCHIP. Without an
+in-kernel irqchip, the multiprocessing state must be maintained by userspace on
+these architectures.
4.40 KVM_SET_IDENTITY_MAP_ADDR
@@ -1774,122 +1797,151 @@ and architecture specific registers. Each have their own range of operation
and their own constants and width. To keep track of the implemented
registers, find a list below:
- Arch | Register | Width (bits)
- | |
- PPC | KVM_REG_PPC_HIOR | 64
- PPC | KVM_REG_PPC_IAC1 | 64
- PPC | KVM_REG_PPC_IAC2 | 64
- PPC | KVM_REG_PPC_IAC3 | 64
- PPC | KVM_REG_PPC_IAC4 | 64
- PPC | KVM_REG_PPC_DAC1 | 64
- PPC | KVM_REG_PPC_DAC2 | 64
- PPC | KVM_REG_PPC_DABR | 64
- PPC | KVM_REG_PPC_DSCR | 64
- PPC | KVM_REG_PPC_PURR | 64
- PPC | KVM_REG_PPC_SPURR | 64
- PPC | KVM_REG_PPC_DAR | 64
- PPC | KVM_REG_PPC_DSISR | 32
- PPC | KVM_REG_PPC_AMR | 64
- PPC | KVM_REG_PPC_UAMOR | 64
- PPC | KVM_REG_PPC_MMCR0 | 64
- PPC | KVM_REG_PPC_MMCR1 | 64
- PPC | KVM_REG_PPC_MMCRA | 64
- PPC | KVM_REG_PPC_MMCR2 | 64
- PPC | KVM_REG_PPC_MMCRS | 64
- PPC | KVM_REG_PPC_SIAR | 64
- PPC | KVM_REG_PPC_SDAR | 64
- PPC | KVM_REG_PPC_SIER | 64
- PPC | KVM_REG_PPC_PMC1 | 32
- PPC | KVM_REG_PPC_PMC2 | 32
- PPC | KVM_REG_PPC_PMC3 | 32
- PPC | KVM_REG_PPC_PMC4 | 32
- PPC | KVM_REG_PPC_PMC5 | 32
- PPC | KVM_REG_PPC_PMC6 | 32
- PPC | KVM_REG_PPC_PMC7 | 32
- PPC | KVM_REG_PPC_PMC8 | 32
- PPC | KVM_REG_PPC_FPR0 | 64
+ Arch | Register | Width (bits)
+ | |
+ PPC | KVM_REG_PPC_HIOR | 64
+ PPC | KVM_REG_PPC_IAC1 | 64
+ PPC | KVM_REG_PPC_IAC2 | 64
+ PPC | KVM_REG_PPC_IAC3 | 64
+ PPC | KVM_REG_PPC_IAC4 | 64
+ PPC | KVM_REG_PPC_DAC1 | 64
+ PPC | KVM_REG_PPC_DAC2 | 64
+ PPC | KVM_REG_PPC_DABR | 64
+ PPC | KVM_REG_PPC_DSCR | 64
+ PPC | KVM_REG_PPC_PURR | 64
+ PPC | KVM_REG_PPC_SPURR | 64
+ PPC | KVM_REG_PPC_DAR | 64
+ PPC | KVM_REG_PPC_DSISR | 32
+ PPC | KVM_REG_PPC_AMR | 64
+ PPC | KVM_REG_PPC_UAMOR | 64
+ PPC | KVM_REG_PPC_MMCR0 | 64
+ PPC | KVM_REG_PPC_MMCR1 | 64
+ PPC | KVM_REG_PPC_MMCRA | 64
+ PPC | KVM_REG_PPC_MMCR2 | 64
+ PPC | KVM_REG_PPC_MMCRS | 64
+ PPC | KVM_REG_PPC_SIAR | 64
+ PPC | KVM_REG_PPC_SDAR | 64
+ PPC | KVM_REG_PPC_SIER | 64
+ PPC | KVM_REG_PPC_PMC1 | 32
+ PPC | KVM_REG_PPC_PMC2 | 32
+ PPC | KVM_REG_PPC_PMC3 | 32
+ PPC | KVM_REG_PPC_PMC4 | 32
+ PPC | KVM_REG_PPC_PMC5 | 32
+ PPC | KVM_REG_PPC_PMC6 | 32
+ PPC | KVM_REG_PPC_PMC7 | 32
+ PPC | KVM_REG_PPC_PMC8 | 32
+ PPC | KVM_REG_PPC_FPR0 | 64
+ ...
+ PPC | KVM_REG_PPC_FPR31 | 64
+ PPC | KVM_REG_PPC_VR0 | 128
...
- PPC | KVM_REG_PPC_FPR31 | 64
- PPC | KVM_REG_PPC_VR0 | 128
+ PPC | KVM_REG_PPC_VR31 | 128
+ PPC | KVM_REG_PPC_VSR0 | 128
...
- PPC | KVM_REG_PPC_VR31 | 128
- PPC | KVM_REG_PPC_VSR0 | 128
+ PPC | KVM_REG_PPC_VSR31 | 128
+ PPC | KVM_REG_PPC_FPSCR | 64
+ PPC | KVM_REG_PPC_VSCR | 32
+ PPC | KVM_REG_PPC_VPA_ADDR | 64
+ PPC | KVM_REG_PPC_VPA_SLB | 128
+ PPC | KVM_REG_PPC_VPA_DTL | 128
+ PPC | KVM_REG_PPC_EPCR | 32
+ PPC | KVM_REG_PPC_EPR | 32
+ PPC | KVM_REG_PPC_TCR | 32
+ PPC | KVM_REG_PPC_TSR | 32
+ PPC | KVM_REG_PPC_OR_TSR | 32
+ PPC | KVM_REG_PPC_CLEAR_TSR | 32
+ PPC | KVM_REG_PPC_MAS0 | 32
+ PPC | KVM_REG_PPC_MAS1 | 32
+ PPC | KVM_REG_PPC_MAS2 | 64
+ PPC | KVM_REG_PPC_MAS7_3 | 64
+ PPC | KVM_REG_PPC_MAS4 | 32
+ PPC | KVM_REG_PPC_MAS6 | 32
+ PPC | KVM_REG_PPC_MMUCFG | 32
+ PPC | KVM_REG_PPC_TLB0CFG | 32
+ PPC | KVM_REG_PPC_TLB1CFG | 32
+ PPC | KVM_REG_PPC_TLB2CFG | 32
+ PPC | KVM_REG_PPC_TLB3CFG | 32
+ PPC | KVM_REG_PPC_TLB0PS | 32
+ PPC | KVM_REG_PPC_TLB1PS | 32
+ PPC | KVM_REG_PPC_TLB2PS | 32
+ PPC | KVM_REG_PPC_TLB3PS | 32
+ PPC | KVM_REG_PPC_EPTCFG | 32
+ PPC | KVM_REG_PPC_ICP_STATE | 64
+ PPC | KVM_REG_PPC_TB_OFFSET | 64
+ PPC | KVM_REG_PPC_SPMC1 | 32
+ PPC | KVM_REG_PPC_SPMC2 | 32
+ PPC | KVM_REG_PPC_IAMR | 64
+ PPC | KVM_REG_PPC_TFHAR | 64
+ PPC | KVM_REG_PPC_TFIAR | 64
+ PPC | KVM_REG_PPC_TEXASR | 64
+ PPC | KVM_REG_PPC_FSCR | 64
+ PPC | KVM_REG_PPC_PSPB | 32
+ PPC | KVM_REG_PPC_EBBHR | 64
+ PPC | KVM_REG_PPC_EBBRR | 64
+ PPC | KVM_REG_PPC_BESCR | 64
+ PPC | KVM_REG_PPC_TAR | 64
+ PPC | KVM_REG_PPC_DPDES | 64
+ PPC | KVM_REG_PPC_DAWR | 64
+ PPC | KVM_REG_PPC_DAWRX | 64
+ PPC | KVM_REG_PPC_CIABR | 64
+ PPC | KVM_REG_PPC_IC | 64
+ PPC | KVM_REG_PPC_VTB | 64
+ PPC | KVM_REG_PPC_CSIGR | 64
+ PPC | KVM_REG_PPC_TACR | 64
+ PPC | KVM_REG_PPC_TCSCR | 64
+ PPC | KVM_REG_PPC_PID | 64
+ PPC | KVM_REG_PPC_ACOP | 64
+ PPC | KVM_REG_PPC_VRSAVE | 32
+ PPC | KVM_REG_PPC_LPCR | 64
+ PPC | KVM_REG_PPC_PPR | 64
+ PPC | KVM_REG_PPC_ARCH_COMPAT | 32
+ PPC | KVM_REG_PPC_DABRX | 32
+ PPC | KVM_REG_PPC_WORT | 64
+ PPC | KVM_REG_PPC_TM_GPR0 | 64
...
- PPC | KVM_REG_PPC_VSR31 | 128
- PPC | KVM_REG_PPC_FPSCR | 64
- PPC | KVM_REG_PPC_VSCR | 32
- PPC | KVM_REG_PPC_VPA_ADDR | 64
- PPC | KVM_REG_PPC_VPA_SLB | 128
- PPC | KVM_REG_PPC_VPA_DTL | 128
- PPC | KVM_REG_PPC_EPCR | 32
- PPC | KVM_REG_PPC_EPR | 32
- PPC | KVM_REG_PPC_TCR | 32
- PPC | KVM_REG_PPC_TSR | 32
- PPC | KVM_REG_PPC_OR_TSR | 32
- PPC | KVM_REG_PPC_CLEAR_TSR | 32
- PPC | KVM_REG_PPC_MAS0 | 32
- PPC | KVM_REG_PPC_MAS1 | 32
- PPC | KVM_REG_PPC_MAS2 | 64
- PPC | KVM_REG_PPC_MAS7_3 | 64
- PPC | KVM_REG_PPC_MAS4 | 32
- PPC | KVM_REG_PPC_MAS6 | 32
- PPC | KVM_REG_PPC_MMUCFG | 32
- PPC | KVM_REG_PPC_TLB0CFG | 32
- PPC | KVM_REG_PPC_TLB1CFG | 32
- PPC | KVM_REG_PPC_TLB2CFG | 32
- PPC | KVM_REG_PPC_TLB3CFG | 32
- PPC | KVM_REG_PPC_TLB0PS | 32
- PPC | KVM_REG_PPC_TLB1PS | 32
- PPC | KVM_REG_PPC_TLB2PS | 32
- PPC | KVM_REG_PPC_TLB3PS | 32
- PPC | KVM_REG_PPC_EPTCFG | 32
- PPC | KVM_REG_PPC_ICP_STATE | 64
- PPC | KVM_REG_PPC_TB_OFFSET | 64
- PPC | KVM_REG_PPC_SPMC1 | 32
- PPC | KVM_REG_PPC_SPMC2 | 32
- PPC | KVM_REG_PPC_IAMR | 64
- PPC | KVM_REG_PPC_TFHAR | 64
- PPC | KVM_REG_PPC_TFIAR | 64
- PPC | KVM_REG_PPC_TEXASR | 64
- PPC | KVM_REG_PPC_FSCR | 64
- PPC | KVM_REG_PPC_PSPB | 32
- PPC | KVM_REG_PPC_EBBHR | 64
- PPC | KVM_REG_PPC_EBBRR | 64
- PPC | KVM_REG_PPC_BESCR | 64
- PPC | KVM_REG_PPC_TAR | 64
- PPC | KVM_REG_PPC_DPDES | 64
- PPC | KVM_REG_PPC_DAWR | 64
- PPC | KVM_REG_PPC_DAWRX | 64
- PPC | KVM_REG_PPC_CIABR | 64
- PPC | KVM_REG_PPC_IC | 64
- PPC | KVM_REG_PPC_VTB | 64
- PPC | KVM_REG_PPC_CSIGR | 64
- PPC | KVM_REG_PPC_TACR | 64
- PPC | KVM_REG_PPC_TCSCR | 64
- PPC | KVM_REG_PPC_PID | 64
- PPC | KVM_REG_PPC_ACOP | 64
- PPC | KVM_REG_PPC_VRSAVE | 32
- PPC | KVM_REG_PPC_LPCR | 64
- PPC | KVM_REG_PPC_PPR | 64
- PPC | KVM_REG_PPC_ARCH_COMPAT 32
- PPC | KVM_REG_PPC_DABRX | 32
- PPC | KVM_REG_PPC_WORT | 64
- PPC | KVM_REG_PPC_TM_GPR0 | 64
+ PPC | KVM_REG_PPC_TM_GPR31 | 64
+ PPC | KVM_REG_PPC_TM_VSR0 | 128
...
- PPC | KVM_REG_PPC_TM_GPR31 | 64
- PPC | KVM_REG_PPC_TM_VSR0 | 128
+ PPC | KVM_REG_PPC_TM_VSR63 | 128
+ PPC | KVM_REG_PPC_TM_CR | 64
+ PPC | KVM_REG_PPC_TM_LR | 64
+ PPC | KVM_REG_PPC_TM_CTR | 64
+ PPC | KVM_REG_PPC_TM_FPSCR | 64
+ PPC | KVM_REG_PPC_TM_AMR | 64
+ PPC | KVM_REG_PPC_TM_PPR | 64
+ PPC | KVM_REG_PPC_TM_VRSAVE | 64
+ PPC | KVM_REG_PPC_TM_VSCR | 32
+ PPC | KVM_REG_PPC_TM_DSCR | 64
+ PPC | KVM_REG_PPC_TM_TAR | 64
+ | |
+ MIPS | KVM_REG_MIPS_R0 | 64
...
- PPC | KVM_REG_PPC_TM_VSR63 | 128
- PPC | KVM_REG_PPC_TM_CR | 64
- PPC | KVM_REG_PPC_TM_LR | 64
- PPC | KVM_REG_PPC_TM_CTR | 64
- PPC | KVM_REG_PPC_TM_FPSCR | 64
- PPC | KVM_REG_PPC_TM_AMR | 64
- PPC | KVM_REG_PPC_TM_PPR | 64
- PPC | KVM_REG_PPC_TM_VRSAVE | 64
- PPC | KVM_REG_PPC_TM_VSCR | 32
- PPC | KVM_REG_PPC_TM_DSCR | 64
- PPC | KVM_REG_PPC_TM_TAR | 64
+ MIPS | KVM_REG_MIPS_R31 | 64
+ MIPS | KVM_REG_MIPS_HI | 64
+ MIPS | KVM_REG_MIPS_LO | 64
+ MIPS | KVM_REG_MIPS_PC | 64
+ MIPS | KVM_REG_MIPS_CP0_INDEX | 32
+ MIPS | KVM_REG_MIPS_CP0_CONTEXT | 64
+ MIPS | KVM_REG_MIPS_CP0_USERLOCAL | 64
+ MIPS | KVM_REG_MIPS_CP0_PAGEMASK | 32
+ MIPS | KVM_REG_MIPS_CP0_WIRED | 32
+ MIPS | KVM_REG_MIPS_CP0_HWRENA | 32
+ MIPS | KVM_REG_MIPS_CP0_BADVADDR | 64
+ MIPS | KVM_REG_MIPS_CP0_COUNT | 32
+ MIPS | KVM_REG_MIPS_CP0_ENTRYHI | 64
+ MIPS | KVM_REG_MIPS_CP0_COMPARE | 32
+ MIPS | KVM_REG_MIPS_CP0_STATUS | 32
+ MIPS | KVM_REG_MIPS_CP0_CAUSE | 32
+ MIPS | KVM_REG_MIPS_CP0_EPC | 64
+ MIPS | KVM_REG_MIPS_CP0_CONFIG | 32
+ MIPS | KVM_REG_MIPS_CP0_CONFIG1 | 32
+ MIPS | KVM_REG_MIPS_CP0_CONFIG2 | 32
+ MIPS | KVM_REG_MIPS_CP0_CONFIG3 | 32
+ MIPS | KVM_REG_MIPS_CP0_CONFIG7 | 32
+ MIPS | KVM_REG_MIPS_CP0_ERROREPC | 64
+ MIPS | KVM_REG_MIPS_COUNT_CTL | 64
+ MIPS | KVM_REG_MIPS_COUNT_RESUME | 64
+ MIPS | KVM_REG_MIPS_COUNT_HZ | 64
ARM registers are mapped using the lower 32 bits. The upper 16 of that
is the register group type, or coprocessor number:
@@ -1928,6 +1980,22 @@ arm64 CCSIDR registers are demultiplexed by CSSELR value:
arm64 system registers have the following id bit patterns:
0x6030 0000 0013 <op0:2> <op1:3> <crn:4> <crm:4> <op2:3>
+
+MIPS registers are mapped using the lower 32 bits. The upper 16 of that is
+the register group type:
+
+MIPS core registers (see above) have the following id bit patterns:
+ 0x7030 0000 0000 <reg:16>
+
+MIPS CP0 registers (see KVM_REG_MIPS_CP0_* above) have the following id bit
+patterns depending on whether they're 32-bit or 64-bit registers:
+ 0x7020 0000 0001 00 <reg:5> <sel:3> (32-bit)
+ 0x7030 0000 0001 00 <reg:5> <sel:3> (64-bit)
+
+MIPS KVM control registers (see above) have the following id bit patterns:
+ 0x7030 0000 0002 <reg:16>
+
+
4.69 KVM_GET_ONE_REG
Capability: KVM_CAP_ONE_REG
@@ -2415,7 +2483,7 @@ in VCPU matching underlying host.
4.84 KVM_GET_REG_LIST
Capability: basic
-Architectures: arm, arm64
+Architectures: arm, arm64, mips
Type: vcpu ioctl
Parameters: struct kvm_reg_list (in/out)
Returns: 0 on success; -1 on error
@@ -2866,15 +2934,18 @@ The fields in each entry are defined as follows:
6. Capabilities that can be enabled
-----------------------------------
-There are certain capabilities that change the behavior of the virtual CPU when
-enabled. To enable them, please see section 4.37. Below you can find a list of
-capabilities and what their effect on the vCPU is when enabling them.
+There are certain capabilities that change the behavior of the virtual CPU or
+the virtual machine when enabled. To enable them, please see section 4.37.
+Below you can find a list of capabilities and what their effect on the vCPU or
+the virtual machine is when enabling them.
The following information is provided along with the description:
Architectures: which instruction set architectures provide this ioctl.
x86 includes both i386 and x86_64.
+ Target: whether this is a per-vcpu or per-vm capability.
+
Parameters: what parameters are accepted by the capability.
Returns: the return value. General error numbers (EBADF, ENOMEM, EINVAL)
@@ -2884,6 +2955,7 @@ The following information is provided along with the description:
6.1 KVM_CAP_PPC_OSI
Architectures: ppc
+Target: vcpu
Parameters: none
Returns: 0 on success; -1 on error
@@ -2898,6 +2970,7 @@ When this capability is enabled, KVM_EXIT_OSI can occur.
6.2 KVM_CAP_PPC_PAPR
Architectures: ppc
+Target: vcpu
Parameters: none
Returns: 0 on success; -1 on error
@@ -2917,6 +2990,7 @@ When this capability is enabled, KVM_EXIT_PAPR_HCALL can occur.
6.3 KVM_CAP_SW_TLB
Architectures: ppc
+Target: vcpu
Parameters: args[0] is the address of a struct kvm_config_tlb
Returns: 0 on success; -1 on error
@@ -2959,6 +3033,7 @@ For mmu types KVM_MMU_FSL_BOOKE_NOHV and KVM_MMU_FSL_BOOKE_HV:
6.4 KVM_CAP_S390_CSS_SUPPORT
Architectures: s390
+Target: vcpu
Parameters: none
Returns: 0 on success; -1 on error
@@ -2970,9 +3045,13 @@ handled in-kernel, while the other I/O instructions are passed to userspace.
When this capability is enabled, KVM_EXIT_S390_TSCH will occur on TEST
SUBCHANNEL intercepts.
+Note that even though this capability is enabled per-vcpu, the complete
+virtual machine is affected.
+
6.5 KVM_CAP_PPC_EPR
Architectures: ppc
+Target: vcpu
Parameters: args[0] defines whether the proxy facility is active
Returns: 0 on success; -1 on error
@@ -2998,7 +3077,17 @@ This capability connects the vcpu to an in-kernel MPIC device.
6.7 KVM_CAP_IRQ_XICS
Architectures: ppc
+Target: vcpu
Parameters: args[0] is the XICS device fd
args[1] is the XICS CPU number (server ID) for this vcpu
This capability connects the vcpu to an in-kernel XICS device.
+
+6.8 KVM_CAP_S390_IRQCHIP
+
+Architectures: s390
+Target: vm
+Parameters: none
+
+This capability enables the in-kernel irqchip for s390. Please refer to
+"4.24 KVM_CREATE_IRQCHIP" for details.