Chris Wilson writes:
> Quoting Francisco Jerez (2019-07-24 21:37:24)
>> Chris Wilson writes:
>>
>> > Since userspace has the ability to bypass the CPU cache from within its
>> > unprivileged command stream, we have to flush the CPU cache to memory
>> > in order to overwrite the previous
Quoting Francisco Jerez (2019-07-24 21:37:24)
> Chris Wilson writes:
>
> > Since userspace has the ability to bypass the CPU cache from within its
> > unprivileged command stream, we have to flush the CPU cache to memory
> > in order to overwrite the previous contents on creation.
> >
> >
Chris Wilson writes:
> Since userspace has the ability to bypass the CPU cache from within its
> unprivileged command stream, we have to flush the CPU cache to memory
> in order to overwrite the previous contents on creation.
>
> Signed-off-by: Chris Wilson
> Cc: Joonas Lahtinen
> Cc:
Quoting Jason Ekstrand (2019-07-19 23:55:03)
> Just to be clear, is this just adding a CLFLUSH or is it actually changing the
> default caching state of buffers from CACHED to NONE? If it's actually
> changing the default state, that's going to break userspace badly.
What userspace is actually
Just to be clear, is this just adding a CLFLUSH or is it actually changing
the default caching state of buffers from CACHED to NONE? If it's actually
changing the default state, that's going to break userspace badly.
--Jason
On Fri, Jul 19, 2019 at 5:21 AM Chris Wilson
wrote:
> Quoting Lionel
Quoting Lionel Landwerlin (2019-07-19 11:18:42)
> On 18/07/2019 17:54, Chris Wilson wrote:
> > Since userspace has the ability to bypass the CPU cache from within its
> > unprivileged command stream, we have to flush the CPU cache to memory
> > in order to overwrite the previous contents on
On 18/07/2019 17:54, Chris Wilson wrote:
Since userspace has the ability to bypass the CPU cache from within its
unprivileged command stream, we have to flush the CPU cache to memory
in order to overwrite the previous contents on creation.
Signed-off-by: Chris Wilson
Cc: Joonas Lahtinen
Cc:
Quoting Chris Wilson (2019-07-18 17:54:06)
> Since userspace has the ability to bypass the CPU cache from within its
> unprivileged command stream, we have to flush the CPU cache to memory
> in order to overwrite the previous contents on creation.
>
> Signed-off-by: Chris Wilson
> Cc: Joonas
Since userspace has the ability to bypass the CPU cache from within its
unprivileged command stream, we have to flush the CPU cache to memory
in order to overwrite the previous contents on creation.
Signed-off-by: Chris Wilson
Cc: Joonas Lahtinen
Cc: stablevger.kernel.org
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