linux

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firmware: smccc: Add HAVE_ARM_SMCCC_DISCOVERY to identify SMCCC v1.1 and above SMCCC v1.0 lacked discoverability of version and features. To accelerate adoption of few mitigations and protect systems more rapidly from various vulnerability, PSCI v1.0 was updated to add SMCCC discovery mechanism though the PSCI firmware implementation of PSCI_FEATURES(SMCCC_VERSION) which returns success on firmware compliant to SMCCC v1.1 and above. This inturn makes SMCCC v1.1 and above dependent on ARM_PSCI_FW for backward compatibility. Let us introduce a new hidden config for the same to build more features on top of SMCCC v1.1 and above. While at it, also sort alphabetically the psci entry. Signed-off-by: Sudeep Holla <sudeep.holla@arm.com> Tested-by: Etienne Carriere <etienne.carriere@st.com> Reviewed-by: Etienne Carriere <etienne.carriere@st.com> Acked-by: Mark Rutland <mark.rutland@arm.com> Link: https://lore.kernel.org/r/20200518091222.27467-2-sudeep.holla@arm.com Signed-off-by: Will Deacon <will@kernel.org> 2020-05-18 10:12:16 +01:00















firmware: smccc: Add ARCH_SOC_ID support SMCCC v1.2 adds a new optional function SMCCC_ARCH_SOC_ID to obtain a SiP defined SoC identification value. Add support for the same. Also using the SoC bus infrastructure, let us expose the platform specific SoC atrributes under sysfs. There are various ways in which it can be represented in shortened form for efficiency and ease of parsing for userspace. The chosen form is described in the ABI document. Link: https://lore.kernel.org/r/20200625095939.50861-1-sudeep.holla@arm.com Cc: Etienne Carriere <etienne.carriere@st.com> Reviewed-by: Steven Price <steven.price@arm.com> Signed-off-by: Sudeep Holla <sudeep.holla@arm.com> 2020-06-25 10:59:39 +01:00

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25 lines

810 B

Raw Normal View History