From 3b306f6f3a03c285a7044350d263cb9251def49d Mon Sep 17 00:00:00 2001 From: Palmer Dabbelt Date: Fri, 26 Oct 2018 12:37:43 -0700 Subject: Revert "RISC-V: Select GENERIC_LIB_UMODDI3 on RV32" I'm removing the generic 64-bit divide support, which means this will no longer work. This reverts commit 757331db921428295948fed5e7377a436e66d34e. Signed-off-by: Palmer Dabbelt --- arch/riscv/Kconfig | 1 - 1 file changed, 1 deletion(-) (limited to 'arch') diff --git a/arch/riscv/Kconfig b/arch/riscv/Kconfig index fe451348ae57..4198759f6798 100644 --- a/arch/riscv/Kconfig +++ b/arch/riscv/Kconfig @@ -109,7 +109,6 @@ config ARCH_RV32I select GENERIC_LIB_ASHRDI3 select GENERIC_LIB_LSHRDI3 select GENERIC_LIB_UCMPDI2 - select GENERIC_LIB_UMODDI3 config ARCH_RV64I bool "RV64I" -- cgit v1.2.3-59-g8ed1b From 732e8e4130ffccb618390e0f80a884543e61fd61 Mon Sep 17 00:00:00 2001 From: Andreas Schwab Date: Tue, 23 Oct 2018 09:33:47 +0200 Subject: RISC-V: properly determine hardware caps On the Hifive-U platform, cpu 0 is a masked cpu with less capabilities than the other cpus. Ignore it for the purpose of determining the hardware capabilities of the system. Signed-off-by: Andreas Schwab Signed-off-by: Palmer Dabbelt --- arch/riscv/kernel/cpufeature.c | 8 +++++--- 1 file changed, 5 insertions(+), 3 deletions(-) (limited to 'arch') diff --git a/arch/riscv/kernel/cpufeature.c b/arch/riscv/kernel/cpufeature.c index 5493f3228704..0339087aa652 100644 --- a/arch/riscv/kernel/cpufeature.c +++ b/arch/riscv/kernel/cpufeature.c @@ -28,7 +28,7 @@ bool has_fpu __read_mostly; void riscv_fill_hwcap(void) { - struct device_node *node; + struct device_node *node = NULL; const char *isa; size_t i; static unsigned long isa2hwcap[256] = {0}; @@ -44,9 +44,11 @@ void riscv_fill_hwcap(void) /* * We don't support running Linux on hertergenous ISA systems. For - * now, we just check the ISA of the first processor. + * now, we just check the ISA of the first "okay" processor. */ - node = of_find_node_by_type(NULL, "cpu"); + while ((node = of_find_node_by_type(node, "cpu"))) + if (riscv_of_processor_hartid(node) >= 0) + break; if (!node) { pr_warning("Unable to find \"cpu\" devicetree entry"); return; -- cgit v1.2.3-59-g8ed1b From 9b4789eacb654b7bbc806c831bcebd799ae0e2f5 Mon Sep 17 00:00:00 2001 From: Palmer Dabbelt Date: Mon, 25 Jun 2018 13:23:12 -0700 Subject: Move EM_RISCV into elf-em.h This should never have been inside our arch port to begin with, it's just a relic from when we were maintaining out of tree patches. Reviewed-by: Kees Cook Reviewed-by: Paul Walmsley Reviewed-by: Christoph Hellwig Tested-by: David Abdurachmanov Signed-off-by: Palmer Dabbelt --- arch/riscv/include/asm/elf.h | 3 --- include/uapi/linux/elf-em.h | 1 + 2 files changed, 1 insertion(+), 3 deletions(-) (limited to 'arch') diff --git a/arch/riscv/include/asm/elf.h b/arch/riscv/include/asm/elf.h index a1ef503d616e..697fc23b0d5a 100644 --- a/arch/riscv/include/asm/elf.h +++ b/arch/riscv/include/asm/elf.h @@ -16,9 +16,6 @@ #include #include -/* TODO: Move definition into include/uapi/linux/elf-em.h */ -#define EM_RISCV 0xF3 - /* * These are used to set parameters in the core dumps. */ diff --git a/include/uapi/linux/elf-em.h b/include/uapi/linux/elf-em.h index 31aa10178335..93722e60204c 100644 --- a/include/uapi/linux/elf-em.h +++ b/include/uapi/linux/elf-em.h @@ -41,6 +41,7 @@ #define EM_TILEPRO 188 /* Tilera TILEPro */ #define EM_MICROBLAZE 189 /* Xilinx MicroBlaze */ #define EM_TILEGX 191 /* Tilera TILE-Gx */ +#define EM_RISCV 243 /* RISC-V */ #define EM_BPF 247 /* Linux BPF - in-kernel virtual machine */ #define EM_FRV 0x5441 /* Fujitsu FR-V */ -- cgit v1.2.3-59-g8ed1b