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Re: [Qemu-devel] [RFC v6 06/14] configure: Use slow-path for atomic only
From: |
Paolo Bonzini |
Subject: |
Re: [Qemu-devel] [RFC v6 06/14] configure: Use slow-path for atomic only when the softmmu is enabled |
Date: |
Mon, 14 Dec 2015 10:38:32 +0100 |
User-agent: |
Mozilla/5.0 (X11; Linux x86_64; rv:38.0) Gecko/20100101 Thunderbird/38.4.0 |
On 14/12/2015 09:41, Alvise Rigo wrote:
> Use the new slow path for atomic instruction translation when the
> softmmu is enabled.
>
> Suggested-by: Jani Kokkonen <address@hidden>
> Suggested-by: Claudio Fontana <address@hidden>
> Signed-off-by: Alvise Rigo <address@hidden>
> ---
> configure | 4 ++++
> 1 file changed, 4 insertions(+)
>
> diff --git a/configure b/configure
> index b9552fd..cc3891a 100755
> --- a/configure
> +++ b/configure
> @@ -4794,6 +4794,7 @@ echo "Install blobs $blobs"
> echo "KVM support $kvm"
> echo "RDMA support $rdma"
> echo "TCG interpreter $tcg_interpreter"
> +echo "use ld/st excl $softmmu"
> echo "fdt support $fdt"
> echo "preadv support $preadv"
> echo "fdatasync $fdatasync"
> @@ -5186,6 +5187,9 @@ fi
> if test "$tcg_interpreter" = "yes" ; then
> echo "CONFIG_TCG_INTERPRETER=y" >> $config_host_mak
> fi
> +if test "$softmmu" = "yes" ; then
> + echo "CONFIG_TCG_USE_LDST_EXCL=y" >> $config_host_mak
> +fi
Just use CONFIG_SOFTMMU in translate.c, no?
A target other than ARM might need ll/sc in user-mode emulation as well.
Paolo
> if test "$fdatasync" = "yes" ; then
> echo "CONFIG_FDATASYNC=y" >> $config_host_mak
> fi
>
[Qemu-devel] [RFC v6 04/14] softmmu: Add helpers for a new slowpath, Alvise Rigo, 2015/12/14
[Qemu-devel] [RFC v6 05/14] tcg: Create new runtime helpers for excl accesses, Alvise Rigo, 2015/12/14
[Qemu-devel] [RFC v6 01/14] exec.c: Add new exclusive bitmap to ram_list, Alvise Rigo, 2015/12/14