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authorKristina Martsenko <kristina.martsenko@arm.com>2017-12-13 20:07:17 +0300
committerCatalin Marinas <catalin.marinas@arm.com>2017-12-22 20:34:52 +0300
commit787fd1d019b269af7912249231dfe34a5fe3e7c8 (patch)
tree156a0b9832cc4bd7dfb6e8c30a4cd5c980a64a72 /virt
parent982aa7c5f0861bf56b2412ca341a13f44c238ba4 (diff)
downloadlinux-787fd1d019b269af7912249231dfe34a5fe3e7c8.tar.xz
arm64: limit PA size to supported range
We currently copy the physical address size from ID_AA64MMFR0_EL1.PARange directly into TCR.(I)PS. This will not work for 4k and 16k granule kernels on systems that support 52-bit physical addresses, since 52-bit addresses are only permitted with the 64k granule. To fix this, fall back to 48 bits when configuring the PA size when the kernel does not support 52-bit PAs. When it does, fall back to 52, to avoid similar problems in the future if the PA size is ever increased above 52. Tested-by: Suzuki K Poulose <suzuki.poulose@arm.com> Reviewed-by: Suzuki K Poulose <suzuki.poulose@arm.com> Reviewed-by: Marc Zyngier <marc.zyngier@arm.com> Tested-by: Bob Picco <bob.picco@oracle.com> Reviewed-by: Bob Picco <bob.picco@oracle.com> Signed-off-by: Kristina Martsenko <kristina.martsenko@arm.com> [catalin.marinas@arm.com: tcr_set_pa_size macro renamed to tcr_compute_pa_size] [catalin.marinas@arm.com: comments added to tcr_compute_pa_size] [catalin.marinas@arm.com: definitions added for TCR_*PS_SHIFT] Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
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