From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-17.3 required=3.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER, INCLUDES_PATCH,MAILING_LIST_MULTI,NICE_REPLY_A,SPF_HELO_NONE,SPF_PASS, USER_AGENT_SANE_1 autolearn=unavailable autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 43E8DC4361B for ; Tue, 15 Dec 2020 10:21:40 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id CE9B322202 for ; Tue, 15 Dec 2020 10:21:39 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726938AbgLOKV3 (ORCPT ); Tue, 15 Dec 2020 05:21:29 -0500 Received: from mx2.suse.de ([195.135.220.15]:37972 "EHLO mx2.suse.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726868AbgLOKVB (ORCPT ); Tue, 15 Dec 2020 05:21:01 -0500 X-Virus-Scanned: by amavisd-new at test-mx.suse.de DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=suse.com; s=susede1; t=1608027614; h=from:from:reply-to:date:date:message-id:message-id:to:to:cc:cc: mime-version:mime-version:content-type:content-type: in-reply-to:in-reply-to:references:references; bh=v6E/FuAqBRtjEWpUkLOQQHYyECJd8V2OJmTVeXYYdiI=; b=tBSbALlU+ae9nzPimjHlRpbm1OEolSVZe4SfTzRrUs6vAL1RNq2pAXGKe4affFJewCp8IK 0cfALj8ie7PTriy8jRWtyK+gj+h32rqv54aoH6eLM1cD2gJ3yMrHK7vgKJhCITgDhGyfTS xYkZTmaPa7SbT3yV4kJwG9H63PTk10w= Received: from relay2.suse.de (unknown [195.135.221.27]) by mx2.suse.de (Postfix) with ESMTP id 22073ACC6; Tue, 15 Dec 2020 10:20:14 +0000 (UTC) Subject: Re: xen/evtchn: Interrupt for port 34, but apparently not enabled; per-user 00000000a86a4c1b on 5.10 From: =?UTF-8?B?SsO8cmdlbiBHcm/Dnw==?= To: Julien Grall , aams@amazon.de Cc: linux-kernel@vger.kernel.org, "xen-devel@lists.xenproject.org" , foersleo@amazon.de References: Message-ID: Date: Tue, 15 Dec 2020 11:20:13 +0100 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:78.0) Gecko/20100101 Thunderbird/78.5.0 MIME-Version: 1.0 In-Reply-To: Content-Type: multipart/signed; micalg=pgp-sha256; protocol="application/pgp-signature"; boundary="pJJnF1VJDpZDxjIP1XrTf4fIpeQCpWAAD" Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org This is an OpenPGP/MIME signed message (RFC 4880 and 3156) --pJJnF1VJDpZDxjIP1XrTf4fIpeQCpWAAD Content-Type: multipart/mixed; boundary="1cw9j9rNmL20humd3iacRPzPxKY2HzWmm"; protected-headers="v1" From: =?UTF-8?B?SsO8cmdlbiBHcm/Dnw==?= To: Julien Grall , aams@amazon.de Cc: linux-kernel@vger.kernel.org, "xen-devel@lists.xenproject.org" , foersleo@amazon.de Message-ID: Subject: Re: xen/evtchn: Interrupt for port 34, but apparently not enabled; per-user 00000000a86a4c1b on 5.10 References: In-Reply-To: --1cw9j9rNmL20humd3iacRPzPxKY2HzWmm Content-Type: multipart/mixed; boundary="------------4EFFBD265BCE690D097DF724" Content-Language: en-US This is a multi-part message in MIME format. --------------4EFFBD265BCE690D097DF724 Content-Type: text/plain; charset=utf-8; format=flowed Content-Transfer-Encoding: quoted-printable On 15.12.20 08:27, J=C3=BCrgen Gro=C3=9F wrote: > On 14.12.20 22:25, Julien Grall wrote: >> Hi Juergen, >> >> When testing Linux 5.10 dom0, I could reliably hit the following=20 >> warning with using event 2L ABI: >> >> [=C2=A0 589.591737] Interrupt for port 34, but apparently not enabled;= =20 >> per-user 00000000a86a4c1b >> [=C2=A0 589.593259] WARNING: CPU: 0 PID: 1111 at=20 >> /home/ANT.AMAZON.COM/jgrall/works/oss/linux/drivers/xen/evtchn.c:170=20 >> evtchn_interrupt+0xeb/0x100 >> [=C2=A0 589.595514] Modules linked in: >> [=C2=A0 589.596145] CPU: 0 PID: 1111 Comm: qemu-system-i38 Tainted: G = >> W=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 5.10.0+ #180 >> [=C2=A0 589.597708] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009)= ,=20 >> BIOS rel-1.12.0-59-gc9ba5276e321-prebuilt.qemu.org 04/01/2014 >> [=C2=A0 589.599782] RIP: e030:evtchn_interrupt+0xeb/0x100 >> [=C2=A0 589.600698] Code: 48 8d bb d8 01 00 00 ba 01 00 00 00 be 1d 00= 00=20 >> 00 e8 d9 10 ca ff eb b2 8b 75 20 48 89 da 48 c7 c7 a8 31 3d 82 e8 65=20 >> 29 a0 ff <0f> 0b e9 42 ff ff ff 0f 1f 40 00 66 2e 0f 1f 84 00 00 00 00= =20 >> 00 0f >> [=C2=A0 589.604087] RSP: e02b:ffffc90040003e70 EFLAGS: 00010086 >> [=C2=A0 589.605102] RAX: 0000000000000000 RBX: ffff888102091800 RCX:=20 >> 0000000000000027 >> [=C2=A0 589.606445] RDX: 0000000000000000 RSI: ffff88817fe19150 RDI:=20 >> ffff88817fe19158 >> [=C2=A0 589.607790] RBP: ffff88810f5ab980 R08: 0000000000000001 R09:=20 >> 0000000000328980 >> [=C2=A0 589.609134] R10: 0000000000000000 R11: ffffc90040003c70 R12:=20 >> ffff888107fd3c00 >> [=C2=A0 589.610484] R13: ffffc90040003ed4 R14: 0000000000000000 R15:=20 >> ffff88810f5ffd80 >> [=C2=A0 589.611828] FS:=C2=A0 00007f960c4b8ac0(0000) GS:ffff88817fe000= 00(0000)=20 >> knlGS:0000000000000000 >> [=C2=A0 589.613348] CS:=C2=A0 10000e030 DS: 0000 ES: 0000 CR0: 0000000= 080050033 >> [=C2=A0 589.614525] CR2: 00007f17ee72e000 CR3: 000000010f5b6000 CR4:=20 >> 0000000000050660 >> [=C2=A0 589.615874] Call Trace: >> [=C2=A0 589.616402]=C2=A0 >> [=C2=A0 589.616855]=C2=A0 __handle_irq_event_percpu+0x4e/0x2c0 >> [=C2=A0 589.617784]=C2=A0 handle_irq_event_percpu+0x30/0x80 >> [=C2=A0 589.618660]=C2=A0 handle_irq_event+0x3a/0x60 >> [=C2=A0 589.619428]=C2=A0 handle_edge_irq+0x9b/0x1f0 >> [=C2=A0 589.620209]=C2=A0 generic_handle_irq+0x4f/0x60 >> [=C2=A0 589.621008]=C2=A0 evtchn_2l_handle_events+0x160/0x280 >> [=C2=A0 589.621913]=C2=A0 __xen_evtchn_do_upcall+0x66/0xb0 >> [=C2=A0 589.622767]=C2=A0 __xen_pv_evtchn_do_upcall+0x11/0x20 >> [=C2=A0 589.623665]=C2=A0 asm_call_irq_on_stack+0x12/0x20 >> [=C2=A0 589.624511]=C2=A0 >> [=C2=A0 589.624978]=C2=A0 xen_pv_evtchn_do_upcall+0x77/0xf0 >> [=C2=A0 589.625848]=C2=A0 exc_xen_hypervisor_callback+0x8/0x10 >> >> This can be reproduced when creating/destroying guest in a loop.=20 >> Although, I have struggled to reproduce it on a vanilla Xen. >> >> After several hours of debugging, I think I have found the root cause.= >> >> While we only expect the unmask to happen when the event channel is=20 >> EOIed, there is an unmask happening as part of handle_edge_irq()=20 >> because the interrupt was seen as pending by another vCPU=20 >> (IRQS_PENDING is set). >> >> It turns out that the event channel is set for multiple vCPU is in=20 >> cpu_evtchn_mask. This is happening because the affinity is not cleared= =20 >> when freeing an event channel. >> >> The implementation of evtchn_2l_handle_events() will look for all the = >> active interrupts for the current vCPU and later on clear the pending = >> bit (via the ack() callback). IOW, I believe, this is not an atomic=20 >> operation. >> >> Even if Xen will notify the event to a single vCPU, evtchn_pending_sel= =20 >> may still be set on the other vCPU (thanks to a different event=20 >> channel). Therefore, there is a chance that two vCPUs will try to=20 >> handle the same interrupt. >> >> The IRQ handler handle_edge_irq() is able to deal with that and will=20 >> mask/unmask the interrupt. This will mess us with the lateeoi logic=20 >> (although, I managed to reproduce it once without XSA-332). >=20 > Thanks for the analysis! >=20 >> My initial idea to fix the problem was to switch the affinity from CPU= =20 >> X to CPU0 when the event channel is freed. >> >> However, I am not sure this is enough because I haven't found anything= =20 >> yet preventing a race between evtchn_2l_handle_events9) and=20 >> evtchn_2l_bind_vcpu(). >> >> So maybe we want to introduce a refcounting (if there is nothing=20 >> provided by the IRQ framework) and only unmask when the counter drop=20 >> to 0. >> >> Any opinions? >=20 > I think we don't need a refcount, but just the internal states "masked"= > and "eoi_pending" and unmask only if both are false. "masked" will be > set when the event is being masked. When delivering a lateeoi irq > "eoi_pending" will be set and "masked "reset. "masked" will be reset > when a normal unmask is happening. And "eoi_pending" will be reset > when a lateeoi is signaled. Any reset of "masked" and "eoi_pending" > will check the other flag and do an unmask if both are false. >=20 > I'll write a patch. Julien, could you please test the attached (only build tested) patch? Juergen --------------4EFFBD265BCE690D097DF724 Content-Type: text/x-patch; charset=UTF-8; name="0001-xen-events-don-t-unmask-an-event-channel-when-an-eoi.patch" Content-Transfer-Encoding: quoted-printable Content-Disposition: attachment; filename*0="0001-xen-events-don-t-unmask-an-event-channel-when-an-eoi.pa"; filename*1="tch" =46rom 2ce5786fd6f29ec09ad653e30e089042ea62b309 Mon Sep 17 00:00:00 2001 From: Juergen Gross Date: Tue, 15 Dec 2020 10:37:11 +0100 Subject: [PATCH] xen/events: don't unmask an event channel when an eoi is= pending An event channel should be kept masked when an eoi is pending for it. When being migrated to another cpu it might be unmasked, though. In order to avoid this keep two different flags for each event channel to be able to distinguish "normal" masking/unmasking from eoi related masking/unmasking. The event channel should only be able to generate an interrupt if both flags are cleared. Cc: stable@vger.kernel.org Fixes: 54c9de89895e0a36047 ("xen/events: add a new late EOI evtchn framew= ork") Reported-by: Julien Grall Signed-off-by: Juergen Gross --- drivers/xen/events/events_base.c | 64 +++++++++++++++++++++++++++----- 1 file changed, 54 insertions(+), 10 deletions(-) diff --git a/drivers/xen/events/events_base.c b/drivers/xen/events/events= _base.c index 6038c4c35db5..b024200f1677 100644 --- a/drivers/xen/events/events_base.c +++ b/drivers/xen/events/events_base.c @@ -96,7 +96,9 @@ struct irq_info { struct list_head eoi_list; short refcnt; short spurious_cnt; - enum xen_irq_type type; /* type */ + short type; /* type: IRQT_* */ + bool masked; /* Is event explicitly masked? */ + bool eoi_pending; /* Is EOI pending? */ unsigned irq; evtchn_port_t evtchn; /* event channel */ unsigned short cpu; /* cpu bound */ @@ -272,6 +274,8 @@ static int xen_irq_info_common_setup(struct irq_info = *info, info->irq =3D irq; info->evtchn =3D evtchn; info->cpu =3D cpu; + info->masked =3D true; + info->eoi_pending =3D false; =20 ret =3D set_evtchn_to_irq(evtchn, irq); if (ret < 0) @@ -545,7 +549,10 @@ static void xen_irq_lateeoi_locked(struct irq_info *= info, bool spurious) } =20 info->eoi_time =3D 0; - unmask_evtchn(evtchn); + info->eoi_pending =3D false; + + if (!info->masked) + unmask_evtchn(evtchn); } =20 static void xen_irq_lateeoi_worker(struct work_struct *work) @@ -801,7 +808,11 @@ static unsigned int __startup_pirq(unsigned int irq)= goto err; =20 out: - unmask_evtchn(evtchn); + info->masked =3D false; + + if (!info->eoi_pending) + unmask_evtchn(evtchn); + eoi_pirq(irq_get_irq_data(irq)); =20 return 0; @@ -828,6 +839,7 @@ static void shutdown_pirq(struct irq_data *data) if (!VALID_EVTCHN(evtchn)) return; =20 + info->masked =3D true; mask_evtchn(evtchn); xen_evtchn_close(evtchn); xen_irq_info_cleanup(info); @@ -1713,18 +1725,26 @@ EXPORT_SYMBOL_GPL(xen_set_affinity_evtchn); =20 static void enable_dynirq(struct irq_data *data) { - evtchn_port_t evtchn =3D evtchn_from_irq(data->irq); + struct irq_info *info =3D info_for_irq(data->irq); + evtchn_port_t evtchn =3D info ? info->evtchn : 0; =20 - if (VALID_EVTCHN(evtchn)) - unmask_evtchn(evtchn); + if (VALID_EVTCHN(evtchn)) { + info->masked =3D false; + + if (!info->eoi_pending) + unmask_evtchn(evtchn); + } } =20 static void disable_dynirq(struct irq_data *data) { - evtchn_port_t evtchn =3D evtchn_from_irq(data->irq); + struct irq_info *info =3D info_for_irq(data->irq); + evtchn_port_t evtchn =3D info ? info->evtchn : 0; =20 - if (VALID_EVTCHN(evtchn)) + if (VALID_EVTCHN(evtchn)) { + info->masked =3D true; mask_evtchn(evtchn); + } } =20 static void ack_dynirq(struct irq_data *data) @@ -1754,6 +1774,30 @@ static void mask_ack_dynirq(struct irq_data *data)= ack_dynirq(data); } =20 +static void lateeoi_ack_dynirq(struct irq_data *data) +{ + struct irq_info *info =3D info_for_irq(data->irq); + evtchn_port_t evtchn =3D info ? info->evtchn : 0; + + if (VALID_EVTCHN(evtchn)) { + info->masked =3D false; + info->eoi_pending =3D true; + mask_evtchn(evtchn); + } +} + +static void lateeoi_mask_ack_dynirq(struct irq_data *data) +{ + struct irq_info *info =3D info_for_irq(data->irq); + evtchn_port_t evtchn =3D info ? info->evtchn : 0; + + if (VALID_EVTCHN(evtchn)) { + info->masked =3D true; + info->eoi_pending =3D true; + mask_evtchn(evtchn); + } +} + static int retrigger_dynirq(struct irq_data *data) { evtchn_port_t evtchn =3D evtchn_from_irq(data->irq); @@ -1973,8 +2017,8 @@ static struct irq_chip xen_lateeoi_chip __read_most= ly =3D { .irq_mask =3D disable_dynirq, .irq_unmask =3D enable_dynirq, =20 - .irq_ack =3D mask_ack_dynirq, - .irq_mask_ack =3D mask_ack_dynirq, + .irq_ack =3D lateeoi_ack_dynirq, + .irq_mask_ack =3D lateeoi_mask_ack_dynirq, =20 .irq_set_affinity =3D set_affinity_irq, .irq_retrigger =3D retrigger_dynirq, --=20 2.26.2 --------------4EFFBD265BCE690D097DF724 Content-Type: application/pgp-keys; name="OpenPGP_0xB0DE9DD628BF132F.asc" Content-Transfer-Encoding: quoted-printable Content-Disposition: attachment; filename="OpenPGP_0xB0DE9DD628BF132F.asc" -----BEGIN PGP PUBLIC KEY BLOCK----- xsBNBFOMcBYBCACgGjqjoGvbEouQZw/ToiBg9W98AlM2QHV+iNHsEs7kxWhKMjrioyspZKOBy= cWx w3ie3j9uvg9EOB3aN4xiTv4qbnGiTr3oJhkB1gsb6ToJQZ8uxGq2kaV2KL9650I1SJvedYm8O= f8Z d621lSmoKOwlNClALZNew72NjJLEzTalU1OdT7/i1TXkH09XSSI8mEQ/ouNcMvIJNwQpd369y= 9bf IhWUiVXEK7MlRgUG6MvIj6Y3Am/BBLUVbDa4+gmzDC9ezlZkTZG2t14zWPvxXP3FAp2pkW0xq= G7/ 377qptDmrk42GlSKN4z76ELnLxussxc7I2hx18NUcbP8+uty4bMxABEBAAHNHEp1ZXJnZW4gR= 3Jv c3MgPGpnQHBmdXBmLm5ldD7CwHkEEwECACMFAlOMcBYCGwMHCwkIBwMCAQYVCAIJCgsEFgIDA= QIe AQIXgAAKCRCw3p3WKL8TL0KdB/93FcIZ3GCNwFU0u3EjNbNjmXBKDY4FUGNQH2lvWAUy+dnyT= hpw dtF/jQ6j9RwE8VP0+NXcYpGJDWlNb9/JmYqLiX2Q3TyevpB0CA3dbBQp0OW0fgCetToGIQrg0= MbD 1C/sEOv8Mr4NAfbauXjZlvTj30H2jO0u+6WGM6nHwbh2l5O8ZiHkH32iaSTfN7Eu5RnNVUJbv= oPH Z8SlM4KWm8rG+lIkGurqqu5gu8q8ZMKdsdGC4bBxdQKDKHEFExLJK/nRPFmAuGlId1E3fe10v= 5QL +qHI3EIPtyfE7i9Hz6rVwi7lWKgh7pe0ZvatAudZ+JNIlBKptb64FaiIOAWDCx1SzR9KdWVyZ= 2Vu IEdyb3NzIDxqZ3Jvc3NAc3VzZS5jb20+wsB5BBMBAgAjBQJTjHCvAhsDBwsJCAcDAgEGFQgCC= QoL BBYCAwECHgECF4AACgkQsN6d1ii/Ey/HmQf/RtI7kv5A2PS4RF7HoZhPVPogNVbC4YA6lW7Dr= Wf0 teC0RR3MzXfy6pJ+7KLgkqMlrAbN/8Dvjoz78X+5vhH/rDLa9BuZQlhFmvcGtCF8eR0T1v0nC= /nu AFVGy+67q2DH8As3KPu0344TBDpAvr2uYM4tSqxK4DURx5INz4ZZ0WNFHcqsfvlGJALDeE0Lh= ITT d9jLzdDad1pQSToCnLl6SBJZjDOX9QQcyUigZFtCXFst4dlsvddrxyqT1f17+2cFSdu7+ynLm= XBK 7abQ3rwJY8SbRO2iRulogc5vr/RLMMlscDAiDkaFQWLoqHHOdfO9rURssHNN8WkMnQfvUewRz= 80h SnVlcmdlbiBHcm9zcyA8amdyb3NzQG5vdmVsbC5jb20+wsB5BBMBAgAjBQJTjHDXAhsDBwsJC= AcD AgEGFQgCCQoLBBYCAwECHgECF4AACgkQsN6d1ii/Ey8PUQf/ehmgCI9jB9hlgexLvgOtf7PJn= FOX gMLdBQgBlVPO3/D9R8LtF9DBAFPNhlrsfIG/SqICoRCqUcJ96Pn3P7UUinFG/I0ECGF4EvTE1= jnD kfJZr6jrbjgyoZHiw/4BNwSTL9rWASyLgqlA8u1mf+c2yUwcGhgkRAd1gOwungxcwzwqgljf0= N51 N5JfVRHRtyfwq/ge+YEkDGcTU6Y0sPOuj4Dyfm8fJzdfHNQsWq3PnczLVELStJNdapwPOoE+l= otu fe3AM2vAEYJ9rTz3Cki4JFUsgLkHFqGZarrPGi1eyQcXeluldO3m91NK/1xMI3/+8jbO0tsn1= tqS EUGIJi7ox80eSnVlcmdlbiBHcm9zcyA8amdyb3NzQHN1c2UuZGU+wsB5BBMBAgAjBQJTjHDrA= hsD BwsJCAcDAgEGFQgCCQoLBBYCAwECHgECF4AACgkQsN6d1ii/Ey+LhQf9GL45eU5vOowA2u5N3= g3O ZUEBmDHVVbqMtzwlmNC4k9Kx39r5s2vcFl4tXqW7g9/ViXYuiDXb0RfUpZiIUW89siKrkzmQ5= dM7 wRqzgJpJwK8Bn2MIxAKArekWpiCKvBOB/Cc+3EXE78XdlxLyOi/NrmSGRIov0karw2RzMNOu5= D+j LRZQd1Sv27AR+IP3I8U4aqnhLpwhK7MEy9oCILlgZ1QZe49kpcumcZKORmzBTNh30FVKK1Evm= V2x AKDoaEOgQB4iFQLhJCdP1I5aSgM5IVFdn7v5YgEYuJYx37IoN1EblHI//x/e2AaIHpzK5h88N= Eaw QsaNRpNSrcfbFmAg987ATQRTjHAWAQgAyzH6AOODMBjgfWE9VeCgsrwH3exNAU32gLq2xvjpW= nHI s98ndPUDpnoxWQugJ6MpMncr0xSwFmHEgnSEjK/PAjppgmyc57BwKII3sV4on+gDVFJR6Y8ZR= wgn BC5mVM6JjQ5xDk8WRXljExRfUX9pNhdE5eBOZJrDRoLUmmjDtKzWaDhIg/+1Hzz93X4fCQkNV= bVF LELU9bMaLPBG/x5q4iYZ2k2ex6d47YE1ZFdMm6YBYMOljGkZKwYde5ldM9mo45mmwe0icXKLk= pEd IXKTZeKDO+Hdv1aqFuAcccTg9RXDQjmwhC3yEmrmcfl0+rPghO0Iv3OOImwTEe4co3c1mwARA= QAB wsBfBBgBAgAJBQJTjHAWAhsMAAoJELDendYovxMvQ/gH/1ha96vm4P/L+bQpJwrZ/dneZcmEw= Tbe 8YFsw2V/Buv6Z4Mysln3nQK5ZadD534CF7TDVft7fC4tU4PONxF5D+/tvgkPfDAfF77zy2AH1= vJz Q1fOU8lYFpZXTXIHb+559UqvIB8AdgR3SAJGHHt4RKA0F7f5ipYBBrC6cyXJyyoprT10EMvU8= VGi wXvTyJz3fjoYsdFzpWPlJEBRMedCot60g5dmbdrZ5DWClAr0yau47zpWj3enf1tLWaqcsuylW= svi uGjKGw7KHQd3bxALOknAp4dN3QwBYCKuZ7AddY9yjynVaD5X7nF9nO5BjR/i1DG86lem3iBDX= zXs ZDn8R38=3D =3D2wuH -----END PGP PUBLIC KEY BLOCK----- --------------4EFFBD265BCE690D097DF724-- --1cw9j9rNmL20humd3iacRPzPxKY2HzWmm-- --pJJnF1VJDpZDxjIP1XrTf4fIpeQCpWAAD Content-Type: application/pgp-signature; name="OpenPGP_signature.asc" Content-Description: OpenPGP digital signature Content-Disposition: attachment; filename="OpenPGP_signature" -----BEGIN PGP SIGNATURE----- wsB5BAABCAAjFiEEhRJncuj2BJSl0Jf3sN6d1ii/Ey8FAl/Yjd0FAwAAAAAACgkQsN6d1ii/Ey+5 Zwf/fVGSTVGDfLz38gLOp+KIQVgZj6DD0KI8joqbxXsD+A+xOEYlYSteRqus1Av6z7lDJdsr+Mm5 n1tFN5wSoeMqYjBguCQgLwZyi3Sj3tFGxb/K5AsbsxAtM8N1zsxJttXCsvPBJO1TPJYJiuG6RWq7 9jklqZOnUP7JNJA9+s6/IUQ/jNiOYLpPhN/03FiQ1F4DSqq4ZIQQsYllHieOkL/4etdZToerlXhG kvb5d1V3/NY+a3bFHLxDucNHnBQ/TszLBYAcBjveVVrRsUY9DyzNkHDfGANB1fH9wGDOB0ErpjmJ rDveDgXxpv4L0dQDQr8cig1EPGVjTHJgWFXoFXv64g== =ou5f -----END PGP SIGNATURE----- --pJJnF1VJDpZDxjIP1XrTf4fIpeQCpWAAD--