Page MenuHomeFreeBSD
Differential D17536

Flush L1 data cache on syscall return with an error.
ClosedPublic
Actions

Authored by kib on Oct 12 2018, 4:22 PM.
Tags
None
Referenced Files
Unknown Object (File)
Mon, Apr 1, 7:29 AM
Unknown Object (File)
Jan 17 2024, 2:57 PM
Unknown Object (File)
Dec 20 2023, 2:17 AM
Unknown Object (File)
Dec 19 2023, 5:15 PM
Unknown Object (File)
Dec 10 2023, 11:22 PM
Unknown Object (File)
Nov 11 2023, 4:05 PM
Unknown Object (File)
Nov 10 2023, 8:55 PM
Unknown Object (File)
Nov 7 2023, 7:00 PM
View All 31 Files
Subscribers
imp

Details

Reviewers
emaste
jhb
bwidawsk
mjg
Commits
rS339507: amd64: flush L1 data cache on syscall return with an error.
Summary

A knob allows to select the flushing mode or turn it off/on.

It is curious that I was not able to measure statistically significant difference between flush enabled vs disabled using syscall_timing getuid.

List of ignored syscall errors should be updated.

The patch is based on the https://www.openwall.com/lists/kernel-hardening/2018/10/11/10

Diff Detail

Repository
rS FreeBSD src repository - subversion
Lint
Lint Not Applicable
Unit
Tests Not Applicable

Revision Contents
Changeset List

PathSize
head/
sys/
amd64/
amd64/
1 line
8 lines
7 lines
80 lines
ia32/
1 line
include/
4 lines
dev/
cpuctl/
3 lines

Diff 49375

View Options

head/sys/amd64/amd64/initcpu.c

Loading...
View Options

head/sys/amd64/amd64/machdep.c

Loading...
View Options

head/sys/amd64/amd64/support.S

Loading...
View Options

head/sys/amd64/amd64/trap.c

Loading...
View Options

head/sys/amd64/ia32/ia32_syscall.c

Loading...
View Options

head/sys/amd64/include/md_var.h

Loading...
View Options

head/sys/dev/cpuctl/cpuctl.c

Loading...