All,
On Mon, Jan 8, 2018 at 11:06 PM, Matt Weber
<matthew.weber@xxxxxxxxxxxxxxxxxxx> wrote:
> A binutils of at least 2.23 is required
> (2.22.x introduced RDSEED).
>
> Signed-off-by: Matthew Weber <matthew.weber@xxxxxxxxxxxxxxxxxxx>
> ---
> configure | 17 +++++++++++++++++
> x86/vmx_tests.c | 6 ++++++
> 2 files changed, 23 insertions(+)
>
> diff --git a/configure b/configure
> index dd9d361..4912582 100755
> --- a/configure
> +++ b/configure
> @@ -171,6 +171,23 @@ mkdir -p lib
> ln -sf "$asm" lib/asm
>
>
> +cat > rd_test.c <<EOF
> +#include <stdint.h>
> +int main() {
> + uint16_t seed=0;
> + unsigned char ok;
> + asm volatile ("rdseed %0; setc %1"
> + : "=r" (seed), "=qm" (ok));
> + return ok;
> +}
> +EOF
> +if $cross_prefix$cc -o /dev/null rd_test.c &> /dev/null; then
> + echo "Checking for rdseed/rdrand... Yes."
> +else
> + CFLAGS="${CFLAGS} -DNO_RDSEEDRAND"
This CFLAGS wasn't actually carried through. I've sent a v2 resolving that.
https://marc.info/?l=kvm&m=151580743523259&w=2
