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Makefile: Don't enable V-extension using -march option

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Enabling V-extension using -march option causes OpenSBI boot-time
hang with LLVM compiler.

As a work-around, don't enable V-extension using -march option and
instead use a custom OpenSBI specific define inform availability of
V-extension to lib/sbi/sbi_trap_v_ldst.c.

Fixes: c2acc5e5b0 ("lib: sbi_misaligned_ldst: Add handling of vector load/store")
Signed-off-by: Anup Patel <apatel@ventanamicro.com>
Reviewed-by: Samuel Holland <samuel.holland@sifive.com>
This commit is contained in:
Anup Patel
2024-12-09 20:06:18 +05:30
committed by Anup Patel
parent 74c6ea014d
commit 5545602f77
2 changed files with 7 additions and 6 deletions
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8
Makefile
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@@ -190,7 +190,7 @@ CC_SUPPORT_STRICT_ALIGN := $(shell $(CC) $(CLANG_TARGET) $(RELAX_FLAG) -nostdlib
CC_SUPPORT_ZICSR_ZIFENCEI := $(shell $(CC) $(CLANG_TARGET) $(RELAX_FLAG) -nostdlib -march=rv$(OPENSBI_CC_XLEN)imafd_zicsr_zifencei -x c /dev/null -o /dev/null 2>&1 | grep -e "zicsr" -e "zifencei" > /dev/null && echo n || echo y)
# Check whether the assembler and the compiler support the Vector extension
CC_SUPPORT_VECT := $(shell echo | $(CC) -dM -E -march=rv$(OPENSBI_CC_XLEN)gv - | grep -q riscv.*vector && echo y || echo n)
CC_SUPPORT_VECTOR := $(shell $(CC) $(CLANG_TARGET) $(RELAX_FLAG) -nostdlib -march=rv$(OPENSBI_CC_XLEN)gv -dM -E -x c /dev/null 2>&1 | grep -q riscv.*vector && echo y || echo n)
ifneq ($(OPENSBI_LD_PIE),y)
$(error Your linker does not support creating PIEs, opensbi requires this.)
@@ -298,9 +298,6 @@ endif
ifndef PLATFORM_RISCV_ISA
ifneq ($(PLATFORM_RISCV_TOOLCHAIN_DEFAULT), 1)
PLATFORM_RISCV_ISA := rv$(PLATFORM_RISCV_XLEN)imafdc
ifeq ($(CC_SUPPORT_VECT), y)
PLATFORM_RISCV_ISA := $(PLATFORM_RISCV_ISA)v
endif
ifeq ($(CC_SUPPORT_ZICSR_ZIFENCEI), y)
PLATFORM_RISCV_ISA := $(PLATFORM_RISCV_ISA)_zicsr_zifencei
endif
@@ -363,6 +360,9 @@ GENFLAGS += $(firmware-genflags-y)
CFLAGS = -g -Wall -Werror -ffreestanding -nostdlib -fno-stack-protector -fno-strict-aliasing -ffunction-sections -fdata-sections
CFLAGS += -fno-omit-frame-pointer -fno-optimize-sibling-calls
# Optionally supported flags
ifeq ($(CC_SUPPORT_VECTOR),y)
CFLAGS += -DOPENSBI_CC_SUPPORT_VECTOR
endif
ifeq ($(CC_SUPPORT_SAVE_RESTORE),y)
CFLAGS += -mno-save-restore
endif