configs/qemu_riscv32_virt: use Linux 5.4 kernel

Now that RISC-V 32-bit (RV32) support has been merged into mainline
glibc, we can use the Linux 5.4 kernel.

Signed-off-by: Alistair Francis <alistair.francis@wdc.com>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>

board/qemu/riscv32-virt/patches/linux/0001-Revert-riscv-Use-latest-system-call-ABI.patch

@@ -1,66 +0,0 @@
-From 15f62343916fcb3cae82e618da28eaa82bc8c007 Mon Sep 17 00:00:00 2001
-From: Alistair Francis <alistair.francis@wdc.com>
-Date: Tue, 16 Apr 2019 09:03:41 -0700
-Subject: [PATCH] Revert "riscv: Use latest system call ABI"
-
-This reverts commit d4c08b9776b392e20efc6198ebe1bc8ec1911d9b.
-
-The latest RISC-V 32bit glibc submission doesn't work with this patch,
-so let's revert it. This revert can be reverted when the glibc
-submission is updated to work on the 5.1 kernel.
-
-Signed-off-by: Alistair Francis <alistair.francis@wdc.com>
----
- arch/riscv/Kconfig                   | 1 +
- arch/riscv/include/uapi/asm/unistd.h | 5 ++++-
- arch/riscv/kernel/vdso/Makefile      | 2 --
- 3 files changed, 5 insertions(+), 3 deletions(-)
-
-diff --git a/arch/riscv/Kconfig b/arch/riscv/Kconfig
-index eb56c82d8aa1..43dd2680c696 100644
---- a/arch/riscv/Kconfig
-+++ b/arch/riscv/Kconfig
-@@ -11,6 +11,7 @@ config 32BIT
- 
- config RISCV
- 	def_bool y
-+	select ARCH_32BIT_OFF_T if !64BIT
- 	# even on 32-bit, physical (and DMA) addresses are > 32-bits
- 	select PHYS_ADDR_T_64BIT
- 	select OF
-diff --git a/arch/riscv/include/uapi/asm/unistd.h b/arch/riscv/include/uapi/asm/unistd.h
-index 0e2eeeb1fd27..486a288b454c 100644
---- a/arch/riscv/include/uapi/asm/unistd.h
-+++ b/arch/riscv/include/uapi/asm/unistd.h
-@@ -17,8 +17,11 @@
- 
- #ifdef __LP64__
- #define __ARCH_WANT_NEW_STAT
--#define __ARCH_WANT_SET_GET_RLIMIT
- #endif /* __LP64__ */
-+#define __ARCH_WANT_SET_GET_RLIMIT
-+#ifndef __LP64__
-+#define __ARCH_WANT_TIME32_SYSCALLS
-+#endif
- 
- #include <asm-generic/unistd.h>
- 
-diff --git a/arch/riscv/kernel/vdso/Makefile b/arch/riscv/kernel/vdso/Makefile
-index fec62b24df89..eed1c137f618 100644
---- a/arch/riscv/kernel/vdso/Makefile
-+++ b/arch/riscv/kernel/vdso/Makefile
-@@ -2,11 +2,9 @@
- 
- # Symbols present in the vdso
- vdso-syms  = rt_sigreturn
--ifdef CONFIG_64BIT
- vdso-syms += gettimeofday
- vdso-syms += clock_gettime
- vdso-syms += clock_getres
--endif
- vdso-syms += getcpu
- vdso-syms += flush_icache
- 
--- 
-2.21.0
-

board/qemu/riscv32-virt/readme.txt

@@ -1,5 +1,5 @@
 Run Linux in emulation with:
 
-  qemu-system-riscv32 -M virt -kernel output/images/fw_jump.elf -device loader,file=output/images/Image,addr=0x80400000 -append "rootwait root=/dev/vda ro" -drive file=output/images/rootfs.ext2,format=raw,id=hd0 -device virtio-blk-device,drive=hd0 -netdev user,id=net0 -device virtio-net-device,netdev=net0 -nographic # qemu_riscv32_virt_defconfig
+  qemu-system-riscv32 -M virt -bios output/images/fw_jump.elf -kernel output/images/Image -append "rootwait root=/dev/vda ro" -drive file=output/images/rootfs.ext2,format=raw,id=hd0 -device virtio-blk-device,drive=hd0 -netdev user,id=net0 -device virtio-net-device,netdev=net0 -nographic # qemu_riscv32_virt_defconfig
 
 The login prompt will appear in the terminal that started Qemu.

configs/qemu_riscv32_virt_defconfig

@@ -5,7 +5,6 @@ BR2_RISCV_32=y
 # System
 BR2_SYSTEM_DHCP="eth0"
 BR2_TARGET_GENERIC_GETTY=y
-BR2_GLOBAL_PATCH_DIR="board/qemu/riscv32-virt/patches/"
 
 # Filesystem
 BR2_TARGET_ROOTFS_EXT2=y
@@ -14,13 +13,13 @@ BR2_TARGET_ROOTFS_EXT2=y
 BR2_ROOTFS_POST_IMAGE_SCRIPT="board/qemu/post-image.sh"
 BR2_ROOTFS_POST_SCRIPT_ARGS="$(BR2_DEFCONFIG)"
 
-# Linux headers same as kernel, a 5.1 series
-BR2_PACKAGE_HOST_LINUX_HEADERS_CUSTOM_5_1=y
+# Linux headers same as kernel, a 5.4 series
+BR2_PACKAGE_HOST_LINUX_HEADERS_CUSTOM_5_4=y
 
 # Kernel
 BR2_LINUX_KERNEL=y
 BR2_LINUX_KERNEL_CUSTOM_VERSION=y
-BR2_LINUX_KERNEL_CUSTOM_VERSION_VALUE="5.1.12"
+BR2_LINUX_KERNEL_CUSTOM_VERSION_VALUE="5.4.61"
 BR2_LINUX_KERNEL_DEFCONFIG="rv32"
 BR2_LINUX_KERNEL_IMAGE=y