riscv: cpufeature: Fix thead vector hwcap removal

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[ Upstream commit e482eab4d1 ]

The riscv_cpuinfo struct that contains mvendorid and marchid is not
populated until all harts are booted which happens after the DT parsing.
Use the mvendorid/marchid from the boot hart to determine if the DT
contains an invalid V.

Fixes: d82f32202e ("RISC-V: Ignore V from the riscv,isa DT property on older T-Head CPUs")
Signed-off-by: Charlie Jenkins <charlie@rivosinc.com>
Reviewed-by: Conor Dooley <conor.dooley@microchip.com>
Reviewed-by: Guo Ren <guoren@kernel.org>
Link: https://lore.kernel.org/r/20240502-cpufeature_fixes-v4-1-b3d1a088722d@rivosinc.com
Signed-off-by: Palmer Dabbelt <palmer@rivosinc.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>

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Charlie Jenkins 2024-05-02 21:50:50 -07:00 • committed by Greg Kroah-Hartman

parent 5915b8981a

commit 18f3fdb174

3 changed files with 44 additions and 6 deletions

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2

arch/riscv/include/asm/sbi.h

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40

arch/riscv/kernel/cpu.c

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8

arch/riscv/kernel/cpufeature.c

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