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authorDave Martin <Dave.Martin@arm.com>2019-02-21 11:42:32 +0000
committerMarc Zyngier <marc.zyngier@arm.com>2019-02-22 09:59:20 +0000
commitc88b093693ccbe41991ef2e9b1d251945e6e54ed (patch)
treeeb4b90f240d0961435e52bd5ea287f2d08f86661 /virt
parent7f5d9c1bc0e6c13ba01546e9c6fda083764a4e9c (diff)
downloadlinux-stericsson-c88b093693ccbe41991ef2e9b1d251945e6e54ed.tar.gz
arm64: KVM: Fix architecturally invalid reset value for FPEXC32_EL2
Due to what looks like a typo dating back to the original addition of FPEXC32_EL2 handling, KVM currently initialises this register to an architecturally invalid value. As a result, the VECITR field (RES1) in bits [10:8] is initialised with 0, and the two reserved (RES0) bits [6:5] are initialised with 1. (In the Common VFP Subarchitecture as specified by ARMv7-A, these two bits were IMP DEF. ARMv8-A removes them.) This patch changes the reset value from 0x70 to 0x700, which reflects the architectural constraints and is presumably what was originally intended. Cc: <stable@vger.kernel.org> # 4.12.x- Cc: Christoffer Dall <christoffer.dall@arm.com> Fixes: 62a89c44954f ("arm64: KVM: 32bit handling of coprocessor traps") Signed-off-by: Dave Martin <Dave.Martin@arm.com> Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
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