[Buildroot] [PATCH v5 2/5] qemu: add qemu_user_opts

From: Yann E. MORIN <yann.morin.1998@free.fr>
To: buildroot@busybox.net
Subject: [Buildroot] [PATCH v5 2/5] qemu: add qemu_user_opts
Date: Sun, 18 Mar 2018 20:18:45 +0100	[thread overview]
Message-ID: <20180318191845.GG2478@scaer> (raw)
In-Reply-To: <20180318190131.21404-3-aduskett@gmail.com>

Adam, all,

On 2018-03-18 15:01 -0400, Adam Duskett spake thusly:
> Add a new variable in qemu.mk: QEMU_USER_OPTS. When qemu-$(ARCH) is
> called, some architectures require a -cpu flag to be passed, or else a
> segfault may occure when building introspection files.
> For PowerPC, many of these cpu's need a specific CPU flag to be passed
> via the command line.
> 
> Signed-off-by: Adam Duskett <aduskett@gmail.com>

Reviewed-by: "Yann E. MORIN" <yann.morin.1998@free.fr>

However, see a little comment below...

> ---
> Changes v1 -> v4:
>   - Add patch to series.
> 
> Changes v4 -> v5:
>  - Change HOST_QEMU_CPU_TUNE to QEMU_USER_OPTS. (Yann)
>  - Add $(QEMU_USER_OPTS) to end of QEMU_USER (Yann)
> 
>  package/qemu/qemu.mk | 33 ++++++++++++++++++++++++++++++++-
>  1 file changed, 32 insertions(+), 1 deletion(-)
> 
> diff --git a/package/qemu/qemu.mk b/package/qemu/qemu.mk
> index 345ef52668..6a0fcabbce 100644
> --- a/package/qemu/qemu.mk
> +++ b/package/qemu/qemu.mk
> @@ -70,6 +70,37 @@ endif
>  ifeq ($(HOST_QEMU_ARCH),sh4aeb)
>  HOST_QEMU_ARCH = sh4eb
>  endif
> +
> +# Add cpu specific callouts for qemu.
> +# In some cases (e.g. ppc) simply being arch specific (apparently) isn't good
> +# enough and a PACKAGE_ARCH specific -cpu option is needed 

What did you meant with "PACKAGE_ARCH"? I guess it's a leftover from the
previous iteration, right?

Just removing it looks like the correct phrasing to me, right?

Regards,
Yann E. MORIN.

> +# For others (e.g. arm) a -cpu option is not necessary, since the
> +# qemu-arm default CPU supports all required architecture levels.
> +ifeq ($(BR2_x86_64),y)
> +QEMU_USER_OPTS = -cpu Nehalem,check=false
> +endif
> +
> +# PowerPC architecture. Currently, the 620, 630, and 970 are not supported.
> +ifeq ($(BR2_powerpc_e5500),y)
> +QEMU_USER_OPTS = -cpu e5500
> +endif
> +
> +ifeq ($(BR2_powerpc_e6500),y)
> +QEMU_USER_OPTS = -cpu e6500
> +endif
> +
> +ifeq ($(BR2_powerpc_power7),y)
> +QEMU_USER_OPTS = -cpu 7400
> +endif
> +
> +ifeq ($(BR2_powerpc64)$(BR2_powerpc_e5500),yy)
> +QEMU_USER_OPTS = -cpu e500mc
> +endif
> +
> +ifeq ($(BR2_powerpc64)$(BR2_powerpc_e6500),yy)
> +QEMU_USER_OPTS = -cpu e500mc
> +endif
> +
>  HOST_QEMU_SYS_ARCH ?= $(HOST_QEMU_ARCH)
>  
>  ifeq ($(BR2_PACKAGE_HOST_QEMU_SYSTEM_MODE),y)
> @@ -147,7 +178,7 @@ endef
>  $(eval $(host-generic-package))
>  
>  # variable used by other packages
> -QEMU_USER = $(HOST_DIR)/bin/qemu-$(HOST_QEMU_ARCH)
> +QEMU_USER = $(HOST_DIR)/bin/qemu-$(HOST_QEMU_ARCH) $(QEMU_USER_OPTS)
>  
>  #-------------------------------------------------------------
>  # Target-qemu
> -- 
> 2.14.3
> 
> _______________________________________________
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> buildroot at busybox.net
> http://lists.busybox.net/mailman/listinfo/buildroot

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