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Message-Id: <20240819001131.1738806-1-antonb@tenstorrent.com>
Date: Mon, 19 Aug 2024 00:11:31 +0000
From: Anton Blanchard <antonb@...storrent.com>
To: linux-riscv@...ts.infradead.org,
	linux-kernel@...r.kernel.org
Cc: Anton Blanchard <antonb@...storrent.com>,
	Paul Walmsley <paul.walmsley@...ive.com>,
	Palmer Dabbelt <palmer@...belt.com>,
	Albert Ou <aou@...s.berkeley.edu>
Subject: [PATCH] riscv: Fix toolchain vector detection

A recent change to gcc flags rv64iv as no longer valid:

   cc1: sorry, unimplemented: Currently the 'V' implementation
   requires the 'M' extension

and as a result vector support is disabled. Fix this by adding m
to our toolchain vector detection code.

Signed-off-by: Anton Blanchard <antonb@...storrent.com>
---
 arch/riscv/Kconfig | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/arch/riscv/Kconfig b/arch/riscv/Kconfig
index 0f3cd7c3a436..939ea7f6a228 100644
--- a/arch/riscv/Kconfig
+++ b/arch/riscv/Kconfig
@@ -552,8 +552,8 @@ config RISCV_ISA_SVPBMT
 config TOOLCHAIN_HAS_V
 	bool
 	default y
-	depends on !64BIT || $(cc-option,-mabi=lp64 -march=rv64iv)
-	depends on !32BIT || $(cc-option,-mabi=ilp32 -march=rv32iv)
+	depends on !64BIT || $(cc-option,-mabi=lp64 -march=rv64imv)
+	depends on !32BIT || $(cc-option,-mabi=ilp32 -march=rv32imv)
 	depends on LLD_VERSION >= 140000 || LD_VERSION >= 23800
 	depends on AS_HAS_OPTION_ARCH
 
-- 
2.34.1


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