freebsd-skq/sys/amd64
Colin Percival 8b4553119e Adjust dangerous-shared-cache-detection logic from "all shared data
caches are dangerous" to "a shared L1 data cache is dangerous".  This
is a compromise between paranoia and performance: Unlike the L1 cache,
nobody has publicly demonstrated a cryptographic side channel which
exploits the L2 cache -- this is harder due to the larger size, lower
bandwidth, and greater associativity -- and prohibiting shared L2
caches turns Intel Core Duo processors into Intel Core Solo processors.

As before, the 'machdep.hyperthreading_allowed' sysctl will allow even
the L1 data cache to be shared.

Discussed with:	jhb, scottl
Security:	See FreeBSD-SA-05:09.htt for background material.
2006-04-24 21:17:01 +00:00
..
acpica If the XSDT address in the RSDP for an ACPI 2.0 machine is NULL, then fall 2006-03-27 15:59:48 +00:00
amd64 Adjust dangerous-shared-cache-detection logic from "all shared data 2006-04-24 21:17:01 +00:00
compile
conf Move AHC_REG_PRETTY_PRINT and AHD_REG_PRETTY_PRINT below 2006-04-24 08:44:34 +00:00
ia32 Simplify system time accounting for profiling. 2006-02-08 08:09:17 +00:00
include Introduce minidumps. Full physical memory crash dumps are still available 2006-04-21 04:24:50 +00:00
isa Rework how we wire up interrupt sources to CPUs: 2006-02-28 22:24:55 +00:00
linux32 regen: fix of linuxolator with testing in a cross-build 2006-03-20 18:54:29 +00:00
pci MFi386: rename pcib_devclass to hostb_devclass (cosmetic here) 2006-03-13 23:58:40 +00:00
Makefile