Re: x86/kaslr: Expose and use the end of the physical memory address space

To: Thomas Gleixner <tglx@xxxxxxxxxxxxx>
Subject: Re: x86/kaslr: Expose and use the end of the physical memory address space
From: Max R <max8rr8@xxxxxxxxx>
Date: Fri, 16 Aug 2024 01:48:18 +0300
Cc: Alistair Popple <apopple@xxxxxxxxxx>, x86@xxxxxxxxxx, Dan Williams <dan.j.williams@xxxxxxxxx>, dave.hansen@xxxxxxxxxxxxxxx, luto@xxxxxxxxxx, peterz@xxxxxxxxxxxxx, linux-kernel@xxxxxxxxxxxxxxx, jhubbard@xxxxxxxxxx, Kees Cook <keescook@xxxxxxxxxxxx>, Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxx>, David Hildenbrand <david@xxxxxxxxxx>, Oscar Salvador <osalvador@xxxxxxx>, linux-mm@xxxxxxxxx
In-reply-to: <87ed6soy3z.ffs@tglx>
References: <20230810100011.14552-1-max8rr8@gmail.com> <87le17yu5y.ffs@tglx> <66b4eb2a62f6_c1448294b0@dwillia2-xfh.jf.intel.com.notmuch> <877ccryor7.ffs@tglx> <66b4f305eb227_c144829443@dwillia2-xfh.jf.intel.com.notmuch> <66b4f4a522508_c1448294f2@dwillia2-xfh.jf.intel.com.notmuch> <87zfpmyhvr.ffs@tglx> <66b523ac448e2_c1448294ec@dwillia2-xfh.jf.intel.com.notmuch> <87seve4e37.fsf@nvdebian.thelocal> <66b59314b3d4_c1448294d3@dwillia2-xfh.jf.intel.com.notmuch> <87zfpks23v.ffs@tglx> <87o75y428z.fsf@nvdebian.thelocal> <87ikw6rrau.ffs@tglx> <87frr9swmw.ffs@tglx> <87bk1x42vk.fsf@nvdebian.thelocal> <87sev8rfyx.ffs@tglx> <87le10p3ak.ffs@tglx> <87ed6soy3z.ffs@tglx>

Thanks, tested against my system and it fixed the iounmap problem:

Tested-By: Max Ramanouski <max8rr8@xxxxxxxxx>

Best regards,
Max

References:
- x86/kaslr: Expose and use the end of the physical memory address space
  - From: Thomas Gleixner