6 commits

Author	SHA1	Message	Date
Ruslan Bukin	7722d8c7c0	Add generic arm/arm64 secure-monitor SMCCC interface and switch ... PSCI code to use it. This interface will also be used by Intel Stratix 10 platform. This was not tested on arm due to lack of PSCI-enabled arm hardware lying around. Reviewed by: andrew Sponsored by: DARPA, AFRL Differential Revision: https://reviews.freebsd.org/D21439	2019-09-13 15:56:33 +00:00
Andrew Turner	100a6d1905	Use int for the pcpu_ssbd argument. This is included from userland and may ... not include the needed headers to get the bool definition. Reported by: manu Pointy hat to: andrew Sponsored by: DARPA, AFRL	2018-07-31 15:08:02 +00:00
Andrew Turner	0594061ee6	Implement the SSBD (CVE-2018-3639) workaround on arm64 ... This calls into the Arm Trusted Firmware to enable and disable the workaround for the Speculative Store Bypass Disable (SSBD) issue, also known as Spectre Variant 4. As this may have a large performance overhead, and how exploitable SSBD is is unknown we follow the Linux lead of allowing the administrator to select between always on, always off, or only enabled in the kernel, with the latter being the default. PR: 228955 Sponsored by: DARPA, AFRL Differential Revision: https://reviews.freebsd.org/D15819	2018-07-31 12:53:27 +00:00
Andrew Turner	95c4b3c735	Fix the SMCCC signatures, they are all 32-bit calls. This fixes SMCCC ... version detection. Sponsored by: DARPA, AFRL	2018-06-20 10:02:50 +00:00
Andrew Turner	09d1a08ddc	Add the SMCCC return codes from ARM DEN 0070A. ... While here add a comment with the document the function IDs come from. Sponsored by: DARPA, AFRL	2018-06-13 15:41:22 +00:00
Andrew Turner	f651b52527	Add support for the ARM SMC Calling Convention (SMCCC). This is a method ... to call into the firmware in a similar way to the existing PSCI, and used PSCI to detect when SMCCC is enabled. There is a function ID space we can use. Currently we only support 3 functions in the ARM Architecture Calls region, however it is expected we will expend these in the future. Sponsored by: DARPA, AFRL	2018-06-13 15:32:00 +00:00