Date: Wed, 23 May 2018 20:27:29 +0530 From: Pratyush Yadav <pratiy0100@gmail.com> To: =?UTF-8?Q?Roger_Pau_Monn=C3=A9?= <roger.pau@citrix.com> Cc: FreeBSD-Xen <freebsd-xen@freebsd.org> Subject: Re: Xen kernel fails to boot, d0v1 triple fault looks like the cuplrit Message-ID: <CA%2BX=3TKx39D068NRzmdJ39-4%2BWmfa8gjncKCyBPT81hzDc=p%2BA@mail.gmail.com> In-Reply-To: <20180523081547.2vvthg42vmphvbex@MacBook-Pro-de-Roger.local> References: <CA%2BX=3T%2BYiUmNNPSSA36QmwYsamgAf0hHEsEock-FcomCHc-Jww@mail.gmail.com> <20180519081030.qhzyjdrpwcekmcac@MacBook-Pro-de-Roger.local> <CA%2BX=3TKazXMk%2BUqL35Fzoa-F7YQWWtt-c6BSSNJQqL-WC31D1A@mail.gmail.com> <20180521090310.c46eexnwe4c7w62x@MacBook-Pro-de-Roger.local> <CA%2BX=3TK0M0j=oqyjgsggy4TdkhAuO6vpRqAaJnmOb_J8cvBZ9g@mail.gmail.com> <20180523081547.2vvthg42vmphvbex@MacBook-Pro-de-Roger.local>
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Hi,
On Wed, May 23, 2018 at 1:45 PM, Roger Pau Monn=C3=A9 <roger.pau@citrix.com=
> wrote:
> It's too early for the logs to be stored anywhere. The point where you
> get the crash is when the APs are started, which is way before FreeBSD
> starts proving for disk devices.
>
> Can you please try the patch below?
>
> Thanks, Roger.
> ---8<---
> diff --git a/sys/x86/xen/pv.c b/sys/x86/xen/pv.c
> index 54184898e9bf..52391e2e7c08 100644
> --- a/sys/x86/xen/pv.c
> +++ b/sys/x86/xen/pv.c
> @@ -113,6 +113,7 @@ static int xen_pv_start_all_aps(void);
> extern char *doublefault_stack;
> extern char *mce_stack;
> extern char *nmi_stack;
> +extern char *dbg_stack;
> #endif
>
> /*
> @@ -329,6 +330,8 @@ start_xen_ap(int cpu)
> (char *)kmem_malloc(kernel_arena, PAGE_SIZE, M_WAITOK | M_ZER=
O);
> nmi_stack =3D
> (char *)kmem_malloc(kernel_arena, PAGE_SIZE, M_WAITOK | M_ZER=
O);
> + dbg_stack =3D
> + (void *)kmem_malloc(kernel_arena, PAGE_SIZE, M_WAITOK | M_ZER=
O);
> dpcpu =3D
> (void *)kmem_malloc(kernel_arena, DPCPU_SIZE, M_WAITOK | M_ZE=
RO);
>
I think we have different pv.c files. For me, line 113 is:
/* Xen init_ops implementation. */
The declarations of doublefault_stach, mce_stack, etc are in line 101.
Similarly, line 329 for me is:
{
in function xen_pv_parse_symtab(void). The declarations your diff
mentions in line 329 are in line 224.
This is in sync with the official repository [0]. Maybe you have
modifications that are not yet upstream?
Anyway, I manually made the changes. It still does not boot (I used
make kernel -DKERNFAST, but I don't think that should make a
difference).
Regards,
Pratyush Yadav
[0] https://github.com/freebsd/freebsd/blob/master/sys/x86/xen/pv.c
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