Conor Dooley b8c86872d1 riscv: fix detection of toolchain Zicbom support ... It is not sufficient to check if a toolchain supports a particular extension without checking if the linker supports that extension too. For example, Clang 15 supports Zicbom but GNU bintutils 2.35.2 does not, leading build errors like so: riscv64-linux-gnu-ld: -march=rv64i2p0_m2p0_a2p0_c2p0_zicbom1p0_zihintpause2p0: Invalid or unknown z ISA extension: 'zicbom' Convert CC_HAS_ZICBOM to TOOLCHAIN_HAS_ZICBOM & check if the linker also supports Zicbom. Reported-by: Kevin Hilman <khilman@baylibre.com> Link: https://github.com/ClangBuiltLinux/linux/issues/1714 Link: https://storage.kernelci.org/next/master/next-20220920/riscv/defconfig+CONFIG_EFI=n/clang-16/logs/kernel.log Fixes: 1631ba1259 ("riscv: Add support for non-coherent devices using zicbom extension") Signed-off-by: Conor Dooley <conor.dooley@microchip.com> Reviewed-by: Heiko Stuebner <heiko@sntech.de> Reviewed-by: Nathan Chancellor <nathan@kernel.org> Link: https://lore.kernel.org/r/20221006173520.1785507-2-conor@kernel.org [Palmer: Check for ld-2.38, not 2.39, as 2.38 no longer errors.] Signed-off-by: Palmer Dabbelt <palmer@rivosinc.com>		2022-10-27 15:12:29 -07:00
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boot	riscv: dts: starfive: correct number of external interrupts	2022-08-11 11:40:37 -07:00
configs	riscv: enable Docker requirements in defconfig	2022-07-22 13:43:28 -07:00
errata	riscv: implement Zicbom-based CMO instructions + the t-head variant	2022-08-10 20:49:32 -07:00
include	RISC-V: KVM: Support sstc extension	2022-08-12 07:43:57 -07:00
kernel	RISC-V Patches for the 5.20 Merge Window, Part 2	2022-08-12 18:39:43 -07:00
kvm	RISC-V: KVM: Support sstc extension	2022-08-12 07:43:57 -07:00
lib	riscv: lib: uaccess: fix CSR_STATUS SR_SUM bit	2022-08-10 14:06:31 -07:00
mm	RISC-V: fixups to work with crash tool	2022-08-11 09:04:01 -07:00
net	bpf, riscv: Support riscv jit to provide bpf_line_info	2022-06-02 16:26:01 -07:00
purgatory	riscv/purgatory: Omit use of bin2c	2022-08-11 09:32:34 -07:00
Kbuild	riscv: move errata/ and kvm/ builds to arch/riscv/Kbuild	2022-06-01 22:26:32 -07:00
Kconfig	riscv: fix detection of toolchain Zicbom support	2022-10-27 15:12:29 -07:00
Kconfig.debug	RISC-V: Remove EARLY_PRINTK support	2018-12-17 10:23:46 -08:00
Kconfig.erratas	riscv: implement Zicbom-based CMO instructions + the t-head variant	2022-08-10 20:49:32 -07:00
Kconfig.socs	riscv: Kconfig: Style cleanups	2022-06-30 19:26:16 -07:00
Makefile	riscv: fix detection of toolchain Zicbom support	2022-10-27 15:12:29 -07:00