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| author | Dave Martin <Dave.Martin@arm.com> | 2019-02-21 12:42:32 +0100 |
|---|---|---|
| committer | Marc Zyngier <marc.zyngier@arm.com> | 2019-02-22 10:59:20 +0100 |
| commit | c88b093693ccbe41991ef2e9b1d251945e6e54ed (patch) | |
| tree | eb4b90f240d0961435e52bd5ea287f2d08f86661 /include | |
| parent | KVM: arm/arm64: Remove unused timer variable (diff) | |
| download | linux-c88b093693ccbe41991ef2e9b1d251945e6e54ed.tar.xz linux-c88b093693ccbe41991ef2e9b1d251945e6e54ed.zip | |
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>
Diffstat (limited to 'include')
0 files changed, 0 insertions, 0 deletions