From: Blue Swirl <blauwirbel@gmail.com>
To: Alexander Graf <agraf@suse.de>
Cc: qemu-devel <qemu-devel@nongnu.org>
Subject: Re: [Qemu-devel] [PATCH, RFT] monitor: implement x86 info tlb for PAE and long modes
Date: Sat, 11 Dec 2010 09:34:19 +0000 [thread overview]
Message-ID: <AANLkTikeMJPuCd6UbhVuZ7BPq2Vcedd4txoDuNHm_=9u@mail.gmail.com> (raw)
In-Reply-To: <DFDCE8A9-1A56-4456-85E0-C232A57961AE@suse.de>
On Tue, Dec 7, 2010 at 10:08 AM, Alexander Graf <agraf@suse.de> wrote:
>
> On 06.12.2010, at 19:38, Blue Swirl wrote:
>
>> On Mon, Dec 6, 2010 at 11:12 AM, Alexander Graf <agraf@suse.de> wrote:
>>>
>>> On 05.12.2010, at 17:25, Blue Swirl wrote:
>>>
>>>> 'info tlb' didn't show correct information for PAE mode and
>>>> x86_64 long mode.
>>>>
>>>> Implement the missing modes. Also print NX bit for PAE and long modes.
>>>> Fix off-by-one error in 32 bit mode mask.
>>>>
>>>> Signed-off-by: Blue Swirl <blauwirbel@gmail.com>
>>>> ---
>>>>
>>>> I didn't find an OS that enabled PAE, please test and report.
>>>
>>> Xen does. Just take a random recent xen kernel and run it with -kernel :).
>>
>> Thanks, it does (CR4 is 0xb0). I'm not sure all is correct, after
>> 0x1000000 the dump looks messy:
>> 0000000000c00000: 0000000000c00000 --PDA---W
>> 0000000000e00000: 0000000000e00000 --PDA---W
>> 0000000001000000: f000ff53f000f000 XG-D-C--W
>> 0000000001001000: f000ff53f000e000 X--D----W
>> 0000000001002000: f000ff53f000f000 XG-D-C--W
>> 0000000001003000: f000ff53f000f000 XG-D-C--W
>> 0000000001004000: f000e987f000f000 X---A--U-
>
> Good question XD. I guess the best way to find out if those numbers are right would be to trace the page tables manually.
Those were actually caused by a bug of not checking the P bit for
intermediate tables, this was fixed in the second version.
> info tlb shows PA : VA, right?
No, VA : PA.
prev parent reply other threads:[~2010-12-11 9:34 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-12-05 16:25 [Qemu-devel] [PATCH, RFT] monitor: implement x86 info tlb for PAE and long modes Blue Swirl
2010-12-06 11:12 ` Alexander Graf
2010-12-06 13:05 ` Ian Campbell
2010-12-06 18:41 ` Blue Swirl
2010-12-07 10:05 ` Ian Campbell
2010-12-06 18:38 ` Blue Swirl
2010-12-07 10:08 ` Alexander Graf
2010-12-11 9:34 ` Blue Swirl [this message]
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