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SMCCC_ARCH_WORKAROUND_1 #2229

Merged
merged 5 commits into from
Apr 13, 2018
Merged

SMCCC_ARCH_WORKAROUND_1 #2229

merged 5 commits into from
Apr 13, 2018

Commits on Apr 13, 2018

  1. core: add smccc.h 

    Adds <smccc.h> introducing new features in SMC calling convention v1.1

See also
Link: https://developer.arm.com/-/media/developer/pdf/ARM_DEN_0070A_Firmware_interfaces_for_mitigating_CVE-2017-5715.pdf

Reviewed-by: Etienne Carriere <[email protected]>
Reviewed-by: Jerome Forissier <[email protected]>
Signed-off-by: Jens Wiklander <[email protected]>
    @jenswi-linaro
    jenswi-linaro committed Apr 13, 2018
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  2. core: arm: add thread_smc() 

    Adds thread_smc() for simple SMC calls to dispatcher in EL3

Reviewed-by: Etienne Carriere <[email protected]>
Reviewed-by: Jerome Forissier <[email protected]>
Signed-off-by: Jens Wiklander <[email protected]>
    @jenswi-linaro
    jenswi-linaro committed Apr 13, 2018
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  3. core: arm64: provide special rw kernel page at EL0 

    Provide a special kernel read/write mapped page while in EL0 if compiled
with CFG_CORE_UNMAP_CORE_AT_EL0 and CFG_CORE_WORKAROUND_SPECTRE_BP_SEC.
This page will later be used as a temporary replacement of
thread_core_local. thread_core_local is not completely replaced, the new
memory is only used for temporary storage of registers via the stack
pointer.

Reviewed-by: Etienne Carriere <[email protected]>
Signed-off-by: Jens Wiklander <[email protected]>
    @jenswi-linaro
    jenswi-linaro committed Apr 13, 2018
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  4. core: arm64: use SMCCC_ARCH_WORKAROUND_1 

    Use SMCCC_ARCH_WORKAROUND_1 to implement CVE-2017-5715 in AArch64.
Previous workarounds for CVE-2017-5715 haven't been fully effective.

Fixes CVE-2017-5715
Reviewed-by: Etienne Carriere <[email protected]>
Reviewed-by: Jerome Forissier <[email protected]>
Tested-by: Jerome Forissier <[email protected]> (HiKey960)
Signed-off-by: Jens Wiklander <[email protected]>
    @jenswi-linaro
    jenswi-linaro committed Apr 13, 2018
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  5. core: calculate size of special rx map at EL0 

    Calculate the required size the read-only executable mapping of kernel
mode code while in user mode (EL0) instead of the old hard coded 8k
size.

Reviewed-by: Etienne Carriere <[email protected]>
Tested-by: Jens Wiklander <[email protected]> (Juno)
Signed-off-by: Jens Wiklander <[email protected]>
    @jenswi-linaro
    jenswi-linaro committed Apr 13, 2018
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