Messages in this thread | | | Date | Thu, 2 Aug 2018 07:09:38 +0800 | From | Alan Kao <> | Subject | Re: [PATCH v2] riscv: Add support to no-FPU systems |
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On Wed, Aug 01, 2018 at 10:55:28AM -0700, Palmer Dabbelt wrote: > On Tue, 26 Jun 2018 21:22:26 PDT (-0700), alankao@andestech.com wrote: > >This patch adds an option, CONFIG_FPU, to enable/disable floating > >procedures. Also, some style issues are fixed. > > > >Signed-off-by: Alan Kao <alankao@andestech.com> > >Cc: Greentime Hu <greentime@andestech.com> > >Cc: Zong Li <zong@andestech.com> > >--- > > arch/riscv/Kconfig | 9 ++++ > > arch/riscv/Makefile | 19 +++---- > > arch/riscv/include/asm/switch_to.h | 6 +++ > > arch/riscv/kernel/entry.S | 3 +- > > arch/riscv/kernel/process.c | 7 ++- > > arch/riscv/kernel/signal.c | 82 +++++++++++++++++++++--------- > > 6 files changed, 90 insertions(+), 36 deletions(-) > > > >diff --git a/arch/riscv/Kconfig b/arch/riscv/Kconfig > >index 6debcc4afc72..6069597ba73f 100644 > >--- a/arch/riscv/Kconfig > >+++ b/arch/riscv/Kconfig > >@@ -232,6 +232,15 @@ config RISCV_BASE_PMU > > > > endmenu > > > >+config FPU > >+ bool "FPU support" > >+ default y > >+ help > >+ Say N here if you want to disable all floating-point related procedure > >+ in the kernel. > >+ > >+ If you don't know what to do here, say Y. > >+ > > endmenu > > Sorry for letting this slide for a bit. While I'm not opposed to a solution > that requires a FPU Kconfig option, it'd be a bit better if we could detect > this at boot time. I think this should be possible because at one point > this actually worked and we could boot the same kernel on FPU and no-FPU > systems. > > If that's not possible then we'll have to take something like this. There > were some comments on this v2 but I don't see a v3, did I miss one?
I have been refatoring this into a patchset containing logically indenpendent patches. It will be sent soon after some sanity checks.
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