05-25-2018
I really hope that Intel will still fix these invulnerabilities in the new processors
5 More Discussions You Might Find Interesting
1. Filesystems, Disks and Memory
I had an issue with a second hard disk in my machine. I have a sparc station running solaris 7. It was working fine but now it wont mount on boot up and when you try to mount it manually it gives an I/O error. I tried a different disk as a control which was fine. What I want to know is if my... (3 Replies)
Discussion started by: Henrik
3 Replies
2. Solaris
Hi there!!!
Need your help in solving some tricky problems.
Since clock() as such is buggy on SUN OS 5 we have started using gettimeofday() in our RTOS applications based on Solaris 9.
The problems we actually encountered previously were - the applications kind of freeze/hang eternally on... (1 Reply)
Discussion started by: smanu
1 Replies
3. UNIX for Beginners Questions & Answers
I recently bought a new HP Spectre x360 laptop and installed Linux (Ubuntu 16.04 LTS 64 bit) for the first time.
I am seeing various bugs. I don't know if the problems are due to:
(a) Hardware problems with the new laptop.
(b) Software issues, i.e. Ubuntu not working with the other... (7 Replies)
Discussion started by: twelth_hour
7 Replies
4. War Stories
Apologies if this is the wrong forum but...
...This is hard hitting stuff.
LKML: Linus Torvalds: Re: x86/enter: Create macros to restrict/unrestrict Indirect Branch Speculation (5 Replies)
Discussion started by: wisecracker
5 Replies
5. AIX
Apologies for this newbie question. We have inherited an IBM p5 520 (9111-520) running AIX 6.1.0.0 which seems to be the base install and no further patches installed.
Is this vulnerable to the Spectre/Meltdown threat?
Are patches available?
Looks like AIX 6.1.0.0 went 'end of support' in... (8 Replies)
Discussion started by: the_garbage
8 Replies
LEARN ABOUT CENTOS
mtrr_add
MTRR_ADD(9) Hardware Interfaces MTRR_ADD(9)
NAME
mtrr_add - Add a memory type region
SYNOPSIS
int mtrr_add(unsigned long base, unsigned long size, unsigned int type, bool increment);
ARGUMENTS
base
Physical base address of region
size
Physical size of region
type
Type of MTRR desired
increment
If this is true do usage counting on the region
DESCRIPTION
Memory type region registers control the caching on newer Intel and non Intel processors. This function allows drivers to request an MTRR
is added. The details and hardware specifics of each processor's implementation are hidden from the caller, but nevertheless the caller
should expect to need to provide a power of two size on an equivalent power of two boundary.
If the region cannot be added either because all regions are in use or the CPU cannot support it a negative value is returned. On success
the register number for this entry is returned, but should be treated as a cookie only.
On a multiprocessor machine the changes are made to all processors. This is required on x86 by the Intel processors.
The available types are
MTRR_TYPE_UNCACHABLE - No caching
MTRR_TYPE_WRBACK - Write data back in bursts whenever
MTRR_TYPE_WRCOMB - Write data back soon but allow bursts
MTRR_TYPE_WRTHROUGH - Cache reads but not writes
BUGS
Needs a quiet flag for the cases where drivers do not mind failures and do not wish system log messages to be sent.
COPYRIGHT
Kernel Hackers Manual 3.10 June 2014 MTRR_ADD(9)