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Re: [Qemu-devel] [RFC 1/6] Add bpf support to qemu
From: |
Daniel P . Berrangé |
Subject: |
Re: [Qemu-devel] [RFC 1/6] Add bpf support to qemu |
Date: |
Mon, 3 Sep 2018 12:59:26 +0100 |
User-agent: |
Mutt/1.10.1 (2018-07-13) |
On Thu, Aug 30, 2018 at 05:27:03PM +0300, Sameeh Jubran wrote:
> From: Sameeh Jubran <address@hidden>
>
> This commit adds the bpf header provided by Linux to Qemu.
s/Qemu/QEMU/
>
> Signed-off-by: Sameeh Jubran <address@hidden>
> ---
> MAINTAINERS | 5 +++++
> configure | 44
> +++++++++++++++++++++++++++++++++++++++++
> scripts/update-linux-headers.sh | 8 ++++++--
> 3 files changed, 55 insertions(+), 2 deletions(-)
>
> diff --git a/MAINTAINERS b/MAINTAINERS
> index 0fb5f38f9f..bf2619239c 100644
> --- a/MAINTAINERS
> +++ b/MAINTAINERS
> @@ -2126,6 +2126,11 @@ F: hw/rdma/*
> F: hw/rdma/vmw/*
> F: docs/pvrdma.txt
>
> +BPF
> +M: Sameeh Jubran <address@hidden>
> +S: Maintained
> +F: linux-headers/linux/bpf.h
> +
> Build and test automation
> -------------------------
> Build and test automation
> diff --git a/configure b/configure
> index a8c4094c87..21edaf59aa 100755
> --- a/configure
> +++ b/configure
> @@ -348,6 +348,7 @@ libattr=""
> xfs=""
> tcg="yes"
> membarrier=""
> +bpf="no"
This should really default to "", with the check below
automatically doing the right thing to automatically
enable/disable it.
> vhost_net="no"
> vhost_crypto="no"
> vhost_scsi="no"
> @@ -1173,6 +1174,10 @@ for opt do
> ;;
> --enable-membarrier) membarrier="yes"
> ;;
> + --disable-bpf) bpf="no"
> + ;;
> + --enable-bpf) bpf="yes"
> + ;;
> --disable-blobs) blobs="no"
> ;;
> --with-pkgversion=*) pkgversion="$optarg"
> @@ -1593,6 +1598,7 @@ disabled with --disable-FEATURE, default is enabled if
> available:
> brlapi BrlAPI (Braile)
> curl curl connectivity
> membarrier membarrier system call (for Linux 4.14+ or Windows)
> + bpf bpf system calls (for Linux 3.18+)
> fdt fdt device tree
> bluez bluez stack connectivity
> kvm KVM acceleration support
> @@ -5232,6 +5238,38 @@ else
> fi
>
> ##########################################
> +# check for usable bpf system call
> +if test "$bpf" = "yes"; then
if test "x$bpf" != "xno"; then
> + have_bpf=no
> + if test "$linux" = "yes" ; then
> + cat > $TMPC << EOF
> + #include <sys/syscall.h>
> + #include "linux/bpf.h"
> + #include <unistd.h>
> + #include <stdlib.h>
> + #include <string.h>
> + int main(void) {
> + union bpf_attr * attr = NULL;
> + syscall(__NR_bpf, BPF_PROG_LOAD, attr, sizeof(attr));
> + exit(0);
> + }
> +EOF
> + bpf_include="-Iinclude/standard-headers/linux"
> + bpf_cflags=""
> + bpf_libs=""
> + if compile_prog "$bpf_include" "$bpf_libs" ; then
> + have_bpf=yes
> + fi
> + fi
> + if test "$have_bpf" = "no"; then
> + feature_not_found "bpf" "libelf libs are not available or else \
> +the bpf system call is not available"
if test "$have_bpf" = "no"; then
if test "x$bpf" = "xyes" ;
then
feature_not_found ....
else
bpf=no
fi
else
bpf=yes
fi
> + fi
> +else
> + bpf=no
> +fi
> +
Regards,
Daniel
--
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- Re: [Qemu-devel] [RFC 1/6] Add bpf support to qemu,
Daniel P . Berrangé <=