linux_dsm_epyc7002/arch/x86/include/uapi/asm
Borislav Petkov 3b56496865 x86, cpu, amd: Add workaround for family 16h, erratum 793
This adds the workaround for erratum 793 as a precaution in case not
every BIOS implements it.  This addresses CVE-2013-6885.

Erratum text:

[Revision Guide for AMD Family 16h Models 00h-0Fh Processors,
document 51810 Rev. 3.04 November 2013]

793 Specific Combination of Writes to Write Combined Memory Types and
Locked Instructions May Cause Core Hang

Description

Under a highly specific and detailed set of internal timing
conditions, a locked instruction may trigger a timing sequence whereby
the write to a write combined memory type is not flushed, causing the
locked instruction to stall indefinitely.

Potential Effect on System

Processor core hang.

Suggested Workaround

BIOS should set MSR
C001_1020[15] = 1b.

Fix Planned

No fix planned

[ hpa: updated description, fixed typo in MSR name ]

Signed-off-by: Borislav Petkov <bp@suse.de>
Link: http://lkml.kernel.org/r/20140114230711.GS29865@pd.tnic
Tested-by: Aravind Gopalakrishnan <aravind.gopalakrishnan@amd.com>
Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>
2014-01-14 16:39:07 -08:00
..
a.out.h
auxvec.h
bitsperlong.h
boot.h
bootparam.h intel_mid: Renamed *mrst* to *intel_mid* 2013-10-17 16:40:47 -07:00
byteorder.h
debugreg.h
e820.h
errno.h
fcntl.h
hw_breakpoint.h create non-empty arch/x86/include/uapi/asm/ files 2012-12-17 17:15:11 -08:00
hyperv.h x86, hyperv: Get the local APIC timer frequency from the hypervisor 2013-10-10 11:44:12 -07:00
ioctl.h
ioctls.h
ipcbuf.h
ist.h
Kbuild
kvm_para.h kvm uapi: Add KICK_CPU and PV_UNHALT definition to uapi 2013-08-26 12:46:01 +03:00
kvm.h kvm: Add KVM_GET_EMULATED_CPUID 2013-10-30 18:54:39 +01:00
ldt.h
mce.h x86, MCE: Retract most UAPI exports 2013-01-09 14:49:02 +01:00
mman.h
msgbuf.h
msr-index.h x86, cpu, amd: Add workaround for family 16h, erratum 793 2014-01-14 16:39:07 -08:00
msr.h
mtrr.h
param.h
perf_regs.h
poll.h
posix_types_32.h
posix_types_64.h
posix_types_x32.h
posix_types.h
prctl.h
processor-flags.h x86, processor-flags: Fix the datatypes and add bit number defines 2013-06-25 16:26:06 -07:00
ptrace-abi.h
ptrace.h
resource.h
sembuf.h
setup.h create non-empty arch/x86/include/uapi/asm/ files 2012-12-17 17:15:11 -08:00
shmbuf.h
sigcontext32.h
sigcontext.h
siginfo.h
signal.h consolidate kernel-side struct sigaction declarations 2013-02-03 15:09:22 -05:00
socket.h
sockios.h
stat.h
statfs.h
svm.h
swab.h
termbits.h
termios.h
types.h
ucontext.h
unistd.h
vm86.h
vmx.h KVM: x86: Update symbolic exit codes 2013-08-13 16:58:42 +02:00
vsyscall.h