Re: [PATCH v3] KVM: Documentation: document MCE ioctls

["Radim Krčmář" <rkrcmar@redhat.com>]

2017-03-13 09:08-0400, Luiz Capitulino:
> 
> Signed-off-by: Luiz Capitulino <lcapitulino@redhat.com>
> ---

Queued, thanks.

> 
> o v2
> 
>  - Rebase against latest queue branch
>  - Several text fixups [Paolo]
> 
> o v3
> 
>  - More small fixes [David]
> 
>  Documentation/virtual/kvm/api.txt | 63 +++++++++++++++++++++++++++++++++++++++
>  1 file changed, 63 insertions(+)
> 
> diff --git a/Documentation/virtual/kvm/api.txt b/Documentation/virtual/kvm/api.txt
> index 3c248f7..fd10689 100644
> --- a/Documentation/virtual/kvm/api.txt
> +++ b/Documentation/virtual/kvm/api.txt
> @@ -3377,6 +3377,69 @@ struct kvm_ppc_resize_hpt {
>  	__u32 pad;
>  };
>  
> +4.104 KVM_X86_GET_MCE_CAP_SUPPORTED
> +
> +Capability: KVM_CAP_MCE
> +Architectures: x86
> +Type: system ioctl
> +Parameters: u64 mce_cap (out)
> +Returns: 0 on success, -1 on error
> +
> +Returns supported MCE capabilities. The u64 mce_cap parameter
> +has the same format as the MSR_IA32_MCG_CAP register. Supported
> +capabilities will have the corresponding bits set.
> +
> +4.105 KVM_X86_SETUP_MCE
> +
> +Capability: KVM_CAP_MCE
> +Architectures: x86
> +Type: vcpu ioctl
> +Parameters: u64 mcg_cap (in)
> +Returns: 0 on success,
> +         -EFAULT if u64 mcg_cap cannot be read,
> +         -EINVAL if the requested number of banks is invalid,
> +         -EINVAL if requested MCE capability is not supported.
> +
> +Initializes MCE support for use. The u64 mcg_cap parameter
> +has the same format as the MSR_IA32_MCG_CAP register and
> +specifies which capabilities should be enabled. The maximum
> +supported number of error-reporting banks can be retrieved when
> +checking for KVM_CAP_MCE. The supported capabilities can be
> +retrieved with KVM_X86_GET_MCE_CAP_SUPPORTED.
> +
> +4.106 KVM_X86_SET_MCE
> +
> +Capability: KVM_CAP_MCE
> +Architectures: x86
> +Type: vcpu ioctl
> +Parameters: struct kvm_x86_mce (in)
> +Returns: 0 on success,
> +         -EFAULT if struct kvm_x86_mce cannot be read,
> +         -EINVAL if the bank number is invalid,
> +         -EINVAL if VAL bit is not set in status field.
> +
> +Inject a machine check error (MCE) into the guest. The input
> +parameter is:
> +
> +struct kvm_x86_mce {
> +	__u64 status;
> +	__u64 addr;
> +	__u64 misc;
> +	__u64 mcg_status;
> +	__u8 bank;
> +	__u8 pad1[7];
> +	__u64 pad2[3];
> +};
> +
> +If the MCE being reported is an uncorrected error, KVM will
> +inject it as an MCE exception into the guest. If the guest
> +MCG_STATUS register reports that an MCE is in progress, KVM
> +causes an KVM_EXIT_SHUTDOWN vmexit.
> +
> +Otherwise, if the MCE is a corrected error, KVM will just
> +store it in the corresponding bank (provided this bank is
> +not holding a previously reported uncorrected error).
> +
>  5. The kvm_run structure
>  ------------------------
>  
> -- 
> 2.9.3
>