Date: Thu, 6 Jun 2019 17:54:18 +0200 (CEST) From: Arnaud YSMAL <arnaud.ysmal@stormshield.eu> To: Ian Lepore <ian@freebsd.org> Cc: freebsd-hackers <freebsd-hackers@freebsd.org> Subject: Re: hwpmc module does not work on armv6/armv7 Message-ID: <1767704859.3973852.1559836458545.JavaMail.zimbra@stormshield.eu> In-Reply-To: <ec8e69ebc58f8bddeec16995a5a28abf46a3e1a1.camel@freebsd.org> References: <1792534203.3920198.1559829382150.JavaMail.zimbra@stormshield.eu> <401683db73f04cecf12bd11f995480d7a54e9187.camel@freebsd.org> <1084915390.3960836.1559835169854.JavaMail.zimbra@stormshield.eu> <ec8e69ebc58f8bddeec16995a5a28abf46a3e1a1.camel@freebsd.org>
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----- Le 6 Juin 19, =C3=A0 17:36, Ian Lepore ian@freebsd.org a =C3=A9crit :
> On Thu, 2019-06-06 at 17:32 +0200, Arnaud YSMAL wrote:
>> ----- Le 6 Juin 19, =C3=A0 17:22, Ian Lepore ian@freebsd.org a =C3=A9cri=
t :
>>=20
>> > On Thu, 2019-06-06 at 15:56 +0200, Arnaud YSMAL wrote:
>> > > Hi,
>> > >=20
>> > > On an armv6/armv7 box, trying to load the hwpmc module lead to an
>> > > error message stating that the pmc_armv7_finalize symbol is
>> > > undefined.
>> > >=20
>> > > This can be fixed by adding this in sys/modules/hwpmc/Makefile :
>> > >=20
>> > > .if ${MACHINE_ARCH:Marmv[67]*} !=3D ""
>> > > SRCS+=3D hwpmc_armv7.c
>> > > .endif
>> > >=20
>> > > Does anyone see any reason for not having this?
>> > >=20
>> > >=20
>> >=20
>> > No reason, that was just a bug. I've committed your fix as
>> > r348741,
>> > thanks!
>>=20
>> Thank you.
>>=20
>> Sorry for not spotting it earlier but, could you please fix the armv7
>> invariant build with this patch?
>>=20
>>=20
>> diff --git a/sys/dev/hwpmc/hwpmc_armv7.c
>> b/sys/dev/hwpmc/hwpmc_armv7.c
>> index 0a601145f8d..d89b5ce302f 100644
>> --- a/sys/dev/hwpmc/hwpmc_armv7.c
>> +++ b/sys/dev/hwpmc/hwpmc_armv7.c
>> @@ -315,11 +315,12 @@ armv7_intr(struct trapframe *tf)
>> int error;
>> int reg, cpu;
>> =20
>> + cpu =3D curcpu;
>> +
>> KASSERT(cpu >=3D 0 && cpu < pmc_cpu_max(),
>> ("[armv7,%d] CPU %d out of range", __LINE__, cpu));
>> =20
>> retval =3D 0;
>> - cpu =3D curcpu;
>> pc =3D armv7_pcpu[cpu];
>> =20
>> for (ri =3D 0; ri < armv7_npmcs; ri++) {
>>=20
>>=20
>=20
> Already did, right before I committed your change. :)
Thanks. :)
=20
> I've just heard on irc that there may be other trouble lurking in armv*
> hwpmc, some kind of fallout from the changes in r334827. Manu is
> looking into it, and will probably post something on the arm@ list when
> he gets it figured out.
Thank you for the information.
>=20
> -- Ian
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