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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>
16 lines
531 B
Text
16 lines
531 B
Text
# SPDX-License-Identifier: GPL-2.0-only
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config HAVE_ARM_SMCCC
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bool
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help
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Include support for the Secure Monitor Call (SMC) and Hypervisor
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Call (HVC) instructions on Armv7 and above architectures.
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config HAVE_ARM_SMCCC_DISCOVERY
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bool
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depends on ARM_PSCI_FW
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default y
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help
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SMCCC v1.0 lacked discoverability and hence PSCI v1.0 was updated
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to add SMCCC discovery mechanism though the PSCI firmware
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implementation of PSCI_FEATURES(SMCCC_VERSION) which returns
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success on firmware compliant to SMCCC v1.1 and above.
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