Andi Kleen bf0cca01b8 x86/speculation/l1tf: Add sysfs reporting for l1tf ... commit 17dbca119312b4e8173d4e25ff64262119fcef38 upstream L1TF core kernel workarounds are cheap and normally always enabled, However they still should be reported in sysfs if the system is vulnerable or mitigated. Add the necessary CPU feature/bug bits. - Extend the existing checks for Meltdowns to determine if the system is vulnerable. All CPUs which are not vulnerable to Meltdown are also not vulnerable to L1TF - Check for 32bit non PAE and emit a warning as there is no practical way for mitigation due to the limited physical address bits - If the system has more than MAX_PA/2 physical memory the invert page workarounds don't protect the system against the L1TF attack anymore, because an inverted physical address will also point to valid memory. Print a warning in this case and report that the system is vulnerable. Add a function which returns the PFN limit for the L1TF mitigation, which will be used in follow up patches for sanity and range checks. [ tglx: Renamed the CPU feature bit to L1TF_PTEINV ] [ dwmw2: Backport to 4.9 (cpufeatures.h, E820) ] Signed-off-by: Andi Kleen <ak@linux.intel.com> Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Reviewed-by: Josh Poimboeuf <jpoimboe@redhat.com> Acked-by: Dave Hansen <dave.hansen@intel.com> Signed-off-by: David Woodhouse <dwmw@amazon.co.uk> Signed-off-by: Guenter Roeck <linux@roeck-us.net> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>		2018-08-15 17:42:09 +02:00
..
power	PM / sleep: declare __tracedata symbols as char[] rather than char	2018-01-31 12:06:08 +01:00
regmap	regmap: Fix reversed bounds check in regmap_raw_write()	2018-04-24 09:32:06 +02:00
attribute_container.c
base.h
bus.c
cacheinfo.c	drivers: base: cacheinfo: fix boot error message when acpi is enabled	2018-01-31 12:06:08 +01:00
class.c
component.c
container.c
core.c	driver core: Don't ignore class_dir_create_and_add() failure.	2018-07-03 11:21:25 +02:00
cpu.c	x86/speculation/l1tf: Add sysfs reporting for l1tf	2018-08-15 17:42:09 +02:00
dd.c	driver core: Partially revert "driver core: correct device's shutdown order"	2018-07-28 07:45:03 +02:00
devcoredump.c
devres.c
devtmpfs.c
dma-coherent.c
dma-contiguous.c
dma-mapping.c
driver.c
firmware_class.c
firmware.c
hypervisor.c
init.c
isa.c	isa: Prevent NULL dereference in isa_bus driver callbacks	2017-12-16 10:33:48 +01:00
Kconfig	sysfs/cpu: Add vulnerability folder	2018-01-17 09:35:33 +01:00
Makefile
map.c
memory.c
module.c
node.c
pinctrl.c
platform-msi.c
platform.c
property.c
soc.c
syscore.c
topology.c
transport_class.c