linux-kernel - Re: [PATCH v3] rcutorture: Add basic ARM64 support to run scripts

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Message-Id: <20180112190923.GZ9671@linux.vnet.ibm.com>
Date:   Fri, 12 Jan 2018 11:09:23 -0800
From:   "Paul E. McKenney" <paulmck@...ux.vnet.ibm.com>
To:     Lihao Liang <lianglihao@...wei.com>
Cc:     guohanjun@...wei.com, linux-kernel@...r.kernel.org,
        linux-arm-kernel@...ts.infradead.org, lihao.liang@...il.com
Subject: Re: [PATCH v3] rcutorture: Add basic ARM64 support to run scripts

On Sat, Jan 13, 2018 at 02:32:20AM +0800, Lihao Liang wrote:
> 
> 
> On 2018/1/13 1:52, Paul E. McKenney wrote:
> > On Fri, Jan 12, 2018 at 06:11:32PM +0800, lianglihao@...wei.com wrote:
> >> From: Lihao Liang <lianglihao@...wei.com>
> >>
> >> This commit adds support of the qemu command qemu-system-aarch64
> >> to rcutorture.
> >>
> >> Signed-off-by: Lihao Liang <lianglihao@...wei.com>
> > 
> > This is to replace your previous patch, not to apply on top of it,
> > correct?  (Either way is fine, just please let me know.)
> 
> Please replace the previous one.

It has been replaced, thank you!

							Thanx, Paul

> Thanks,
> Lihao.
> 
> > 							Thanx, Paul
> > 
> >> ---
> >>
> >> Comparing to the previous version, this patch lifts the limitation of
> >> maximum 8 CPUs of option "-M virt" by adding "gic-version=host" to it.
> >> This allows qemu to use the maximum CPU number supported by the actual
> >> hardware.
> >>
> >> This commit is against RCU's git branch rcu/dev
> >>
> >> commit 505b61b2ec1d ("EXP: rcu: Add debugging info to other assertion")
> >>
> >>
> >>  tools/testing/selftests/rcutorture/bin/functions.sh | 17 +++++++++++++++--
> >>  1 file changed, 15 insertions(+), 2 deletions(-)
> >>
> >> diff --git a/tools/testing/selftests/rcutorture/bin/functions.sh b/tools/testing/selftests/rcutorture/bin/functions.sh
> >> index 07a1377..65f6655 100644
> >> --- a/tools/testing/selftests/rcutorture/bin/functions.sh
> >> +++ b/tools/testing/selftests/rcutorture/bin/functions.sh
> >> @@ -136,6 +136,9 @@ identify_boot_image () {
> >>  		qemu-system-x86_64|qemu-system-i386)
> >>  			echo arch/x86/boot/bzImage
> >>  			;;
> >> +		qemu-system-aarch64)
> >> +			echo arch/arm64/boot/Image
> >> +			;;
> >>  		*)
> >>  			echo vmlinux
> >>  			;;
> >> @@ -158,6 +161,9 @@ identify_qemu () {
> >>  	elif echo $u | grep -q "Intel 80386"
> >>  	then
> >>  		echo qemu-system-i386
> >> +	elif echo $u | grep -q aarch64
> >> +	then
> >> +		echo qemu-system-aarch64
> >>  	elif uname -a | grep -q ppc64
> >>  	then
> >>  		echo qemu-system-ppc64
> >> @@ -176,16 +182,20 @@ identify_qemu () {
> >>  # Output arguments for the qemu "-append" string based on CPU type
> >>  # and the TORTURE_QEMU_INTERACTIVE environment variable.
> >>  identify_qemu_append () {
> >> +	local console=ttyS0
> >>  	case "$1" in
> >>  	qemu-system-x86_64|qemu-system-i386)
> >>  		echo noapic selinux=0 initcall_debug debug
> >>  		;;
> >> +	qemu-system-aarch64)
> >> +		console=ttyAMA0
> >> +		;;
> >>  	esac
> >>  	if test -n "$TORTURE_QEMU_INTERACTIVE"
> >>  	then
> >>  		echo root=/dev/sda
> >>  	else
> >> -		echo console=ttyS0
> >> +		echo console=$console
> >>  	fi
> >>  }
> >>
> >> @@ -197,6 +207,9 @@ identify_qemu_args () {
> >>  	case "$1" in
> >>  	qemu-system-x86_64|qemu-system-i386)
> >>  		;;
> >> +	qemu-system-aarch64)
> >> +		echo -machine virt,gic-version=host -cpu host
> >> +		;;
> >>  	qemu-system-ppc64)
> >>  		echo -enable-kvm -M pseries -nodefaults
> >>  		echo -device spapr-vscsi
> >> @@ -254,7 +267,7 @@ specify_qemu_cpus () {
> >>  		echo $2
> >>  	else
> >>  		case "$1" in
> >> -		qemu-system-x86_64|qemu-system-i386)
> >> +		qemu-system-x86_64|qemu-system-i386|qemu-system-aarch64)
> >>  			echo $2 -smp $3
> >>  			;;
> >>  		qemu-system-ppc64)
> >> -- 
> >> 2.7.4
> >>
> > 
> > 
> > .
> > 
>