Borislav Petkov (AMD) ac41e90d8d x86/srso: Add a Speculative RAS Overflow mitigation ... Upstream commit: fb3bd914b3 Add a mitigation for the speculative return address stack overflow vulnerability found on AMD processors. The mitigation works by ensuring all RET instructions speculate to a controlled location, similar to how speculation is controlled in the retpoline sequence. To accomplish this, the __x86_return_thunk forces the CPU to mispredict every function return using a 'safe return' sequence. To ensure the safety of this mitigation, the kernel must ensure that the safe return sequence is itself free from attacker interference. In Zen3 and Zen4, this is accomplished by creating a BTB alias between the untraining function srso_untrain_ret_alias() and the safe return function srso_safe_ret_alias() which results in evicting a potentially poisoned BTB entry and using that safe one for all function returns. In older Zen1 and Zen2, this is accomplished using a reinterpretation technique similar to Retbleed one: srso_untrain_ret() and srso_safe_ret(). Signed-off-by: Borislav Petkov (AMD) <bp@alien8.de> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>		2023-08-08 20:03:50 +02:00
..
firmware_loader	…
power	PM: sleep: wakeirq: fix wake irq arming	2023-08-03 10:24:16 +02:00
regmap	regmap: Account for register length in SMBus I/O limits	2023-07-27 08:50:26 +02:00
test	…
Kconfig	…
Makefile	…
arch_numa.c	…
arch_topology.c	…
attribute_container.c	…
auxiliary.c	…
base.h	…
bus.c	…
cacheinfo.c	drivers: base: cacheinfo: Fix shared_cpu_map changes in event of CPU hotplug	2023-06-09 10:34:17 +02:00
class.c	…
component.c	drivers: base: component: fix memory leak with using debugfs_lookup()	2023-03-11 13:55:39 +01:00
container.c	…
core.c	…
cpu.c	x86/srso: Add a Speculative RAS Overflow mitigation	2023-08-08 20:03:50 +02:00
dd.c	driver core: Don't require dynamic_debug for initcall_debug probe timing	2023-05-01 08:26:27 +09:00
devcoredump.c	…
devres.c	…
devtmpfs.c	…
driver.c	…
firmware.c	…
hypervisor.c	…
init.c	…
isa.c	…
map.c	…
memory.c	…
module.c	…
node.c	…
physical_location.c	…
physical_location.h	…
pinctrl.c	…
platform-msi.c	…
platform.c	platform: Provide a remove callback that returns no value	2023-05-24 17:32:43 +01:00
property.c	drivers: fwnode: fix fwnode_irq_get[_byname]()	2023-07-19 16:21:57 +02:00
soc.c	…
swnode.c	…
syscore.c	…
topology.c	…
trace.c	…
trace.h	…
transport_class.c	…