On Tue, 2024-11-26 at 07:49 -0800, Dave Hansen wrote:
> On 11/26/24 03:42, David Woodhouse wrote:
> > I threw this version together and it didn't immediately explode...
>
> It's better than playing #define games. The damage is also pretty
> limited and it helps us avoid plumbing a bit through the
On 11/26/24 03:42, David Woodhouse wrote:
> I threw this version together and it didn't immediately explode...
It's better than playing #define games. The damage is also pretty
limited and it helps us avoid plumbing a bit through the page table
handling function arguments.
On Mon, 2024-11-25 at 11:13 -0800, Dave Hansen wrote:
> On 11/25/24 10:53, David Woodhouse wrote:
> > > I think we have a lot of software-available space in the page table
> > > pointer entries. What would folks think if we set a special bit in those
> > > p4d entries that said:
> > >
> > > "I d
On 25 November 2024 19:13:02 GMT, Dave Hansen wrote:
>On 11/25/24 10:53, David Woodhouse wrote:
>>> I think we have a lot of software-available space in the page table
>>> pointer entries. What would folks think if we set a special bit in those
>>> p4d entries that said:
>>>
>>> "I don't need
On 11/25/24 10:53, David Woodhouse wrote:
>> I think we have a lot of software-available space in the page table
>> pointer entries. What would folks think if we set a special bit in those
>> p4d entries that said:
>>
>> "I don't need to be propagated to
>> the user portion of the page ta
On Mon, 2024-11-25 at 10:31 -0800, Dave Hansen wrote:
> On 11/25/24 09:05, David Woodhouse wrote:
> > Not sure I like this very much, but it works, and mirrors what
> > arch/x86/boot/compressed/ident_map_64.c already does.
>
> I don't like it much, either.
>
> arch/x86/boot/compressed/ is already
On 11/25/24 09:05, David Woodhouse wrote:
> Not sure I like this very much, but it works, and mirrors what
> arch/x86/boot/compressed/ident_map_64.c already does.
I don't like it much, either.
arch/x86/boot/compressed/ is already on the road to sharing no code with
the core kernel and it's full o
From: David Woodhouse
With PTI enabled, set_p4d() and set_pgd() will scribble over the end of
the 4KiB page allocated by the ->alloc_pgt_page() callback, expecting it
to have been an 8KiB allocation with the userspace version immediately
after the kernel's version.
So build *just* this code with
