Michael Kelley 88f6b5f10f firmware: smccc: Fix check for ARCH_SOC_ID not implemented ... [ Upstream commit e95d8eaee2 ] The ARCH_FEATURES function ID is a 32-bit SMC call, which returns a 32-bit result per the SMCCC spec. Current code is doing a 64-bit comparison against -1 (SMCCC_RET_NOT_SUPPORTED) to detect that the feature is unimplemented. That check doesn't work in a Hyper-V VM, where the upper 32-bits are zero as allowed by the spec. Cast the result as an 'int' so the comparison works. The change also makes the code consistent with other similar checks in this file. Fixes: 821b67fa46 ("firmware: smccc: Add ARCH_SOC_ID support") Signed-off-by: Michael Kelley <mikelley@microsoft.com> Reviewed-by: Sudeep Holla <sudeep.holla@arm.com> Signed-off-by: Arnd Bergmann <arnd@arndb.de> Signed-off-by: Sasha Levin <sashal@kernel.org>		2021-12-01 09:04:49 +01:00
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Kconfig	firmware: smccc: Add ARCH_SOC_ID support	2020-07-06 09:48:06 +01:00
kvm_guest.c	arm/arm64: Probe for the presence of KVM hypervisor	2021-03-31 09:16:55 +01:00
Makefile	arm/arm64: Probe for the presence of KVM hypervisor	2021-03-31 09:16:55 +01:00
smccc.c	firmware: smccc: Register smccc_trng platform device	2021-08-06 19:45:25 +08:00
soc_id.c	firmware: smccc: Fix check for ARCH_SOC_ID not implemented	2021-12-01 09:04:49 +01:00