From: Jan Beulich <jbeulich@suse.com>
To: Andrew Cooper <andrew.cooper3@citrix.com>
Cc: "xen-devel@lists.xenproject.org" <xen-devel@lists.xenproject.org>,
"Wei Liu" <wl@xen.org>, "Roger Pau Monné" <roger.pau@citrix.com>
Subject: Re: [Xen-devel] [PATCH] x86: refine link time stub area related assertion
Date: Wed, 15 Jan 2020 17:27:39 +0100 [thread overview]
Message-ID: <0d70e32d-b1ff-8b3e-e6f6-dee52734534f@suse.com> (raw)
In-Reply-To: <b68451ec-6594-d4a4-1227-fa3026608122@citrix.com>
On 15.01.2020 15:36, Andrew Cooper wrote:
> On 15/01/2020 10:26, Jan Beulich wrote:
>> While it has been me to introduce this, the use of | there has become
>> (and perhaps was from the very beginning) misleading. Rather than
>> avoiding the right side of it when linking the xen.efi intermediate file
>> at a different base address, make the expression cope with that case,
>> thus verifying placement on every step.
>>
>> Signed-off-by: Jan Beulich <jbeulich@suse.com>
>
> Acked-by: Andrew Cooper <andrew.cooper3@citrix.com> as this is simply a
> rearranging, but...
>
>>
>> --- a/xen/arch/x86/xen.lds.S
>> +++ b/xen/arch/x86/xen.lds.S
>> @@ -351,8 +351,8 @@ SECTIONS
>> .comment 0 : { *(.comment) }
>> }
>>
>> -ASSERT(__image_base__ > XEN_VIRT_START |
>> - __2M_rwdata_end <= XEN_VIRT_END - NR_CPUS * PAGE_SIZE,
>> +ASSERT(__2M_rwdata_end <= XEN_VIRT_END - XEN_VIRT_START + __XEN_VIRT_START -
>> + NR_CPUS * PAGE_SIZE,
>
> ... doesn't this want a stubs_per_page term? We don't have 4k per cpu.
Good point - let me see if I can fix this at this same occasion.
I guess when introducing these pages I had one per CPU initially,
and then forgot to update the assertion here (it being too strict
of course is better than it being too lax).
Jan
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next prev parent reply other threads:[~2020-01-15 16:28 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-01-15 10:26 [Xen-devel] [PATCH] x86: refine link time stub area related assertion Jan Beulich
2020-01-15 14:36 ` Andrew Cooper
2020-01-15 16:08 ` Wei Liu
2020-01-15 16:27 ` Jan Beulich [this message]
2020-01-15 16:29 ` Andrew Cooper
2020-01-15 16:31 ` Jan Beulich
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