riscv: Add norvc after .option arch in runtime const

.option arch clobbers .option norvc. Prevent gas from emitting
compressed instructions in the runtime const alternative blocks by
setting .option

riscv: Add norvc after .option arch in runtime const

.option arch clobbers .option norvc. Prevent gas from emitting
compressed instructions in the runtime const alternative blocks by
setting .option norvc after .option arch. This issue starts appearing on
gcc 15, which adds zca to the march.

Reported by: Klara Modin <[email protected]>
Signed-off-by: Charlie Jenkins <[email protected]>
Fixes: a44fb5722199 ("riscv: Add runtime constant support")
Closes: https://lore.kernel.org/all/[email protected]/
Tested-by: Klara Modin <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Alexandre Ghiti <[email protected]>

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riscv: Make sure toolchain supports zba before using zba instructions

Old toolchain like gcc 8.5.0 does not support zba, so we must check that
the toolchain supports this extension before using it i

riscv: Make sure toolchain supports zba before using zba instructions

Old toolchain like gcc 8.5.0 does not support zba, so we must check that
the toolchain supports this extension before using it in the kernel.

Reported-by: kernel test robot <[email protected]>
Closes: https://lore.kernel.org/oe-kbuild-all/[email protected]/
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Alexandre Ghiti <[email protected]>

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riscv: Add norvc after .option arch in runtime const

.option arch clobbers .option norvc. Prevent gas from emitting
compressed instructions in the runtime const alternative blocks by
setting .option

riscv: Add norvc after .option arch in runtime const

.option arch clobbers .option norvc. Prevent gas from emitting
compressed instructions in the runtime const alternative blocks by
setting .option norvc after .option arch. This issue starts appearing on
gcc 15, which adds zca to the march.

Reported by: Klara Modin <[email protected]>
Signed-off-by: Charlie Jenkins <[email protected]>
Fixes: a44fb5722199 ("riscv: Add runtime constant support")
Closes: https://lore.kernel.org/all/[email protected]/
Cc: [email protected]
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Palmer Dabbelt <[email protected]>

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riscv: Add runtime constant support

Implement the runtime constant infrastructure for riscv. Use this
infrastructure to generate constants to be used by the d_hash()
function.

This is the riscv var

riscv: Add runtime constant support

Implement the runtime constant infrastructure for riscv. Use this
infrastructure to generate constants to be used by the d_hash()
function.

This is the riscv variant of commit 94a2bc0f611c ("arm64: add 'runtime
constant' support") and commit e3c92e81711d ("runtime constants: add
x86 architecture support").

[ alex: Remove trailing whitespace ]

Signed-off-by: Charlie Jenkins <[email protected]>
Reviewed-by: Alexandre Ghiti <[email protected]>
Tested-by: Alexandre Ghiti <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Alexandre Ghiti <[email protected]>

show more ...