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由 Mark Rutland 提交于
In emulate_mrs() we may erroneously write back to the user SP rather than XZR if we trap an MRS instruction where Xt == 31. Use the new pt_regs_write_reg() helper to handle this correctly. Signed-off-by: NMark Rutland <mark.rutland@arm.com> Fixes: 77c97b4e ("arm64: cpufeature: Expose CPUID registers by emulation") Cc: Andre Przywara <andre.przywara@arm.com> Cc: Catalin Marinas <catalin.marinas@arm.com> Cc: Marc Zyngier <marc.zyngier@arm.com> Cc: Suzuki K Poulose <suzuki.poulose@arm.com> Cc: Will Deacon <will.deacon@arm.com> Signed-off-by: NWill Deacon <will.deacon@arm.com>
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