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KVM: MIPS: Document MIPS specifics of KVM API.

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Document the MIPS specific parts of the KVM API, including:
 - The layout of the kvm_regs structure.
 - The interrupt number passed to KVM_INTERRUPT.
 - The registers supported by the KVM_{GET,SET}_ONE_REG interface, and
   the encoding of those register ids.
 - That KVM_INTERRUPT and KVM_GET_REG_LIST are supported on MIPS.

Signed-off-by: James Hogan <james.hogan@imgtec.com>
Cc: Paolo Bonzini <pbonzini@redhat.com>
Cc: Gleb Natapov <gleb@kernel.org>
Cc: kvm@vger.kernel.org
Cc: Randy Dunlap <rdunlap@infradead.org>
Cc: linux-doc@vger.kernel.org
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
This commit is contained in:
James Hogan 2014-07-04 15:11:35 +01:00 committed by Paolo Bonzini
parent bf5590f379
commit c2d2c21bff
1 changed files with 61 additions and 2 deletions
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63
Documentation/virtual/kvm/api.txt
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@ -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
@ -1890,6 +1904,35 @@ registers, find a list below:
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
...
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 +1971,22 @@ 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 +2474,7 @@ 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