On Tue, 2018-06-12 at 14:39 -0700, H. Peter Anvin wrote:
> On 06/12/18 14:24, Dmitry Safonov wrote:
> > >
> > > Move align_vdso_addr() after get_unmapped_area() to make sure
> > > that
> > > errata for AMD 15h is always applied.
> >
> > Alternative dirty-hacky idea:
> > specify some (struct file*
On 06/12/18 14:24, Dmitry Safonov wrote:
>>
>> Move align_vdso_addr() after get_unmapped_area() to make sure that
>> errata for AMD 15h is always applied.
>
> Alternative dirty-hacky idea:
> specify some (struct file*) to get_unmapped_area() for vdso vma, then
> mapping would be automatically alig
On Tue, 2018-06-12 at 21:49 +0100, Dmitry Safonov wrote:
> There is errata for AMD family 15h CPUs [1] and since
> commit dfb09f9b7ab03 ("x86, amd: Avoid cache aliasing penalties on
> AMD
> family 15h") bits [14:12] are being cleared for shared libraries.
> Also per-boot ASLR applies over upper bit
There is errata for AMD family 15h CPUs [1] and since
commit dfb09f9b7ab03 ("x86, amd: Avoid cache aliasing penalties on AMD
family 15h") bits [14:12] are being cleared for shared libraries.
Also per-boot ASLR applies over upper bits by OR directly over the
address.
As we need special alignment an
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