Re: [Xen-devel] [PATCH 03/22] mini-os: add CONFIG_PARAVIRT

[Samuel Thibault <samuel.thibault@xxxxxxxxxxxx>]

Juergen Gross, on Tue 23 Aug 2016 17:15:49 +0200, wrote:
> Add a new config macro CONFIG_PARAVIRT which defaults to be defined on
> x86. This is the first step for supporting a HVMlite Mini-OS.
> 
> Doing this via CONFIG_PARAVIRT instead of something like CONFIG_HVMLITE
> was chosen as the arm port can then drop some dummy routines needed for
> para-virtualization only.
> 
> Add include/paravirt.h for furute support of paravirt specific
> handling.

future*

> Signed-off-by: Juergen Gross <jgross@xxxxxxxx>

Reviewed-by: Samuel Thibault <samuel.thibault@xxxxxxxxxxxx>

> ---
>  Config.mk          |  6 ++++++
>  include/paravirt.h | 33 +++++++++++++++++++++++++++++++++
>  2 files changed, 39 insertions(+)
>  create mode 100644 include/paravirt.h
> 
> diff --git a/Config.mk b/Config.mk
> index 8ab1a7e..aa36761 100644
> --- a/Config.mk
> +++ b/Config.mk
> @@ -153,6 +153,11 @@ LDFLAGS-$(clang) += -plugin LLVMgold.so
>  endif
>  
>  # Configuration defaults
> +ifeq ($(TARGET_ARCH_FAM),x86)
> +CONFIG_PARAVIRT ?= y
> +else
> +CONFIG_PARAVIRT ?= n
> +endif
>  CONFIG_START_NETWORK ?= y
>  CONFIG_SPARSE_BSS ?= y
>  CONFIG_QEMU_XS_ARGS ?= n
> @@ -172,6 +177,7 @@ CONFIG_LWIP ?= $(lwip)
>  CONFIG_BALLOON ?= n
>  
>  # Export config items as compiler directives
> +DEFINES-$(CONFIG_PARAVIRT) += -DCONFIG_PARAVIRT
>  DEFINES-$(CONFIG_START_NETWORK) += -DCONFIG_START_NETWORK
>  DEFINES-$(CONFIG_SPARSE_BSS) += -DCONFIG_SPARSE_BSS
>  DEFINES-$(CONFIG_QEMU_XS_ARGS) += -DCONFIG_QEMU_XS_ARGS
> diff --git a/include/paravirt.h b/include/paravirt.h
> new file mode 100644
> index 0000000..7852e16
> --- /dev/null
> +++ b/include/paravirt.h
> @@ -0,0 +1,33 @@
> +/* -*-  Mode:C; c-basic-offset:4; tab-width:4 -*-
> + *
> + * (C) 2016 - Juergen Gross, SUSE Linux GmbH
> + *
> + * Permission is hereby granted, free of charge, to any person obtaining a 
> copy
> + * of this software and associated documentation files (the "Software"), to
> + * deal in the Software without restriction, including without limitation the
> + * rights to use, copy, modify, merge, publish, distribute, sublicense, 
> and/or
> + * sell copies of the Software, and to permit persons to whom the Software is
> + * furnished to do so, subject to the following conditions:
> + *
> + * The above copyright notice and this permission notice shall be included in
> + * all copies or substantial portions of the Software.
> + *
> + * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
> + * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
> + * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL 
> THE
> + * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
> + * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
> + * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
> + * DEALINGS IN THE SOFTWARE.
> + */
> +
> +#ifndef _PARAVIRT_H
> +#define _PARAVIRT_H
> +
> +#if defined(CONFIG_PARAVIRT)
> +
> +#else
> +
> +#endif
> +
> +#endif /* _PARAVIRT_H */
> -- 
> 2.6.6
> 

-- 
Samuel
Pour un père, autant mourir que de faire plein de calculs et pas s'occuper
de son fils
 -+- y sur #ens-mim - sombres histoires de zombies -+-

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