Re: [PATCH 01/11] Signed-off-by: Karim Taha <kariem.taha2.7@gmail.com>

["Daniel P. Berrangé" <berrange@redhat.com>]

On Fri, Apr 21, 2023 at 07:22:45AM +0200, Karim Taha wrote:
> From: Warner Losh <imp@bsdimp.com>
> 
> Allow guest_base to be initialized on 64-bit hosts, the initial value is used by g2h_untagged function defined in include/exec/cpu_ldst.h

This commit message is all incorrectly structured I'm afraid.

There needs to a short 1 line summary, then a blank line,
then the full commit description text, then a blank line,
then the Signed-off-by tag(s).

Also if you're sending work done by Warner (as the From
tag suggests), then we would expect to see Warner's own
Signed-off-by tag, in addition to your own Signed-off-by.

> ---
>  bsd-user/main.c | 16 +++++++++++++++-
>  1 file changed, 15 insertions(+), 1 deletion(-)
> 
> diff --git a/bsd-user/main.c b/bsd-user/main.c
> index babc3b009b..afdc1b5f3c 100644
> --- a/bsd-user/main.c
> +++ b/bsd-user/main.c
> @@ -50,8 +50,22 @@
>  #include "target_arch_cpu.h"
>  
>  int singlestep;
> -uintptr_t guest_base;
> +
> +/*
> + * Going hand in hand with the va space needed (see below), we need
> + * to find a host address to map the guest to. Assume that qemu
> + * itself doesn't need memory above 32GB (or that we don't collide
> + * with anything interesting). This is selected rather arbitrarily,
> + * but seems to produce good results in tests to date.
> + */
> +# if HOST_LONG_BITS >= 64
> +uintptr_t guest_base = 0x800000000ul;    /* at 32GB */
> +bool have_guest_base = true;
> +#else
> +uintptr_t guest_base;    /* TODO: use sysctl to find big enough hole */
>  bool have_guest_base;
> +#endif
> +
>  /*
>   * When running 32-on-64 we should make sure we can fit all of the possible
>   * guest address space into a contiguous chunk of virtual host memory.
> -- 
> 2.40.0
> 
> 

With regards,
Daniel
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