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Tue, 15 Dec 2020 07:21:39 -0800 (PST) Sender: Guenter Roeck Subject: Re: [PATCH 3/5] irqchip/bcm2836: Make IPIs use handle_percpu_devid_irq() To: Marc Zyngier Cc: Valentin Schneider , linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org, Andrew Lunn , Lorenzo Pieralisi , Jason Cooper , Scott Branden , Gregory Clement , Florian Fainelli , Ray Jui , Thomas Gleixner , Sebastian Hesselbarth References: <20201109094121.29975-1-valentin.schneider@arm.com> <20201109094121.29975-4-valentin.schneider@arm.com> <20201215002134.GA182208@roeck-us.net> <38f8fbe9ceb7a0adb47e62d62260b297@kernel.org> From: Guenter Roeck Autocrypt: addr=linux@roeck-us.net; keydata= xsFNBE6H1WcBEACu6jIcw5kZ5dGeJ7E7B2uweQR/4FGxH10/H1O1+ApmcQ9i87XdZQiB9cpN RYHA7RCEK2dh6dDccykQk3bC90xXMPg+O3R+C/SkwcnUak1UZaeK/SwQbq/t0tkMzYDRxfJ7 nyFiKxUehbNF3r9qlJgPqONwX5vJy4/GvDHdddSCxV41P/ejsZ8PykxyJs98UWhF54tGRWFl 7i1xvaDB9lN5WTLRKSO7wICuLiSz5WZHXMkyF4d+/O5ll7yz/o/JxK5vO/sduYDIlFTvBZDh gzaEtNf5tQjsjG4io8E0Yq0ViobLkS2RTNZT8ICq/Jmvl0SpbHRvYwa2DhNsK0YjHFQBB0FX IdhdUEzNefcNcYvqigJpdICoP2e4yJSyflHFO4dr0OrdnGLe1Zi/8Xo/2+M1dSSEt196rXaC kwu2KgIgmkRBb3cp2vIBBIIowU8W3qC1+w+RdMUrZxKGWJ3juwcgveJlzMpMZNyM1jobSXZ0 VHGMNJ3MwXlrEFPXaYJgibcg6brM6wGfX/LBvc/haWw4yO24lT5eitm4UBdIy9pKkKmHHh7s jfZJkB5fWKVdoCv/omy6UyH6ykLOPFugl+hVL2Prf8xrXuZe1CMS7ID9Lc8FaL1ROIN/W8Vk BIsJMaWOhks//7d92Uf3EArDlDShwR2+D+AMon8NULuLBHiEUQARAQABzTJHdWVudGVyIFJv ZWNrIChMaW51eCBhY2NvdW50KSA8bGludXhAcm9lY2stdXMubmV0PsLBgQQTAQIAKwIbAwYL CQgHAwIGFQgCCQoLBBYCAwECHgECF4ACGQEFAlVcphcFCRmg06EACgkQyx8mb86fmYFg0RAA nzXJzuPkLJaOmSIzPAqqnutACchT/meCOgMEpS5oLf6xn5ySZkl23OxuhpMZTVX+49c9pvBx hpvl5bCWFu5qC1jC2eWRYU+aZZE4sxMaAGeWenQJsiG9lP8wkfCJP3ockNu0ZXXAXwIbY1O1 c+l11zQkZw89zNgWgKobKzrDMBFOYtAh0pAInZ9TSn7oA4Ctejouo5wUugmk8MrDtUVXmEA9 7f9fgKYSwl/H7dfKKsS1bDOpyJlqhEAH94BHJdK/b1tzwJCFAXFhMlmlbYEk8kWjcxQgDWMu GAthQzSuAyhqyZwFcOlMCNbAcTSQawSo3B9yM9mHJne5RrAbVz4TWLnEaX8gA5xK3uCNCeyI sqYuzA4OzcMwnnTASvzsGZoYHTFP3DQwf2nzxD6yBGCfwNGIYfS0i8YN8XcBgEcDFMWpOQhT Pu3HeztMnF3HXrc0t7e5rDW9zCh3k2PA6D2NV4fews9KDFhLlTfCVzf0PS1dRVVWM+4jVl6l HRIAgWp+2/f8dx5vPc4Ycp4IsZN0l1h9uT7qm1KTwz+sSl1zOqKD/BpfGNZfLRRxrXthvvY8 BltcuZ4+PGFTcRkMytUbMDFMF9Cjd2W9dXD35PEtvj8wnEyzIos8bbgtLrGTv/SYhmPpahJA l8hPhYvmAvpOmusUUyB30StsHIU2LLccUPPOwU0ETofVZwEQALlLbQeBDTDbwQYrj0gbx3bq 7kpKABxN2MqeuqGr02DpS9883d/t7ontxasXoEz2GTioevvRmllJlPQERVxM8gQoNg22twF7 pB/zsrIjxkE9heE4wYfN1AyzT+AxgYN6f8hVQ7Nrc9XgZZe+8IkuW/Nf64KzNJXnSH4u6nJM J2+Dt274YoFcXR1nG76Q259mKwzbCukKbd6piL+VsT/qBrLhZe9Ivbjq5WMdkQKnP7gYKCAi pNVJC4enWfivZsYupMd9qn7Uv/oCZDYoBTdMSBUblaLMwlcjnPpOYK5rfHvC4opxl+P/Vzyz 6WC2TLkPtKvYvXmdsI6rnEI4Uucg0Au/Ulg7aqqKhzGPIbVaL+U0Wk82nz6hz+WP2ggTrY1w ZlPlRt8WM9w6WfLf2j+PuGklj37m+KvaOEfLsF1v464dSpy1tQVHhhp8LFTxh/6RWkRIR2uF I4v3Xu/k5D0LhaZHpQ4C+xKsQxpTGuYh2tnRaRL14YMW1dlI3HfeB2gj7Yc8XdHh9vkpPyuT nY/ZsFbnvBtiw7GchKKri2gDhRb2QNNDyBnQn5mRFw7CyuFclAksOdV/sdpQnYlYcRQWOUGY HhQ5eqTRZjm9z+qQe/T0HQpmiPTqQcIaG/edgKVTUjITfA7AJMKLQHgp04Vylb+G6jocnQQX JqvvP09whbqrABEBAAHCwWUEGAECAA8CGwwFAlVcpi8FCRmg08MACgkQyx8mb86fmYHNRQ/+ J0OZsBYP4leJvQF8lx9zif+v4ZY/6C9tTcUv/KNAE5leyrD4IKbnV4PnbrVhjq861it/zRQW cFpWQszZyWRwNPWUUz7ejmm9lAwPbr8xWT4qMSA43VKQ7ZCeTQJ4TC8kjqtcbw41SjkjrcTG wF52zFO4bOWyovVAPncvV9eGA/vtnd3xEZXQiSt91kBSqK28yjxAqK/c3G6i7IX2rg6pzgqh hiH3/1qM2M/LSuqAv0Rwrt/k+pZXE+B4Ud42hwmMr0TfhNxG+X7YKvjKC+SjPjqp0CaztQ0H nsDLSLElVROxCd9m8CAUuHplgmR3seYCOrT4jriMFBtKNPtj2EE4DNV4s7k0Zy+6iRQ8G8ng QjsSqYJx8iAR8JRB7Gm2rQOMv8lSRdjva++GT0VLXtHULdlzg8VjDnFZ3lfz5PWEOeIMk7Rj trjv82EZtrhLuLjHRCaG50OOm0hwPSk1J64R8O3HjSLdertmw7eyAYOo4RuWJguYMg5DRnBk WkRwrSuCn7UG+qVWZeKEsFKFOkynOs3pVbcbq1pxbhk3TRWCGRU5JolI4ohy/7JV1TVbjiDI HP/aVnm6NC8of26P40Pg8EdAhajZnHHjA7FrJXsy3cyIGqvg9os4rNkUWmrCfLLsZDHD8FnU mDW4+i+XlNFUPUYMrIKi9joBhu18ssf5i5Q= Message-ID: <1795afb5-a4fd-3a90-99c4-71373476ad65@roeck-us.net> Date: Tue, 15 Dec 2020 07:21:37 -0800 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:68.0) Gecko/20100101 Thunderbird/68.10.0 MIME-Version: 1.0 In-Reply-To: <38f8fbe9ceb7a0adb47e62d62260b297@kernel.org> Content-Type: text/plain; charset=utf-8 Content-Language: en-US Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Hi Marc, On 12/15/20 2:19 AM, Marc Zyngier wrote: > Hi Gunter, > > On 2020-12-15 00:21, Guenter Roeck wrote: >> On Mon, Nov 09, 2020 at 09:41:19AM +0000, Valentin Schneider wrote: >>> As done for the Arm GIC irqchips, move IPIs to handle_percpu_devid_irq() as >>> handle_percpu_devid_fasteoi_ipi() isn't actually required. >>> >>> Signed-off-by: Valentin Schneider >> >> This patch results in boot failures (silent stall) for the qemu >> raspi2 emulation. Unfortunately it can not be reverted because >> handle_percpu_devid_fasteoi_ipi no longer exists in next-20201214, >> so I don't know if it is the only problem. > > This is odd. This works just fine for me on both the RPi2 and 3 > emulation, running a full Debian userspace. Could this be caused > by the version of QEMU you are using? Here's what I have: > > $ qemu-system-arm --version > QEMU emulator version 5.1.0 (Debian 1:5.1+dfsg-4+b1) > I used qemu 5.0 which - up to now - worked fine. Let me try with 5.1 and 5.2. Sorry, I should have tried first before bothering you. Guenter > Could you try the following hack and let me know if that helps? > > Thanks, > >         M. > > diff --git a/drivers/irqchip/irq-bcm2836.c b/drivers/irqchip/irq-bcm2836.c > index 5f5eb8877c41..25c9a9c06e41 100644 > --- a/drivers/irqchip/irq-bcm2836.c > +++ b/drivers/irqchip/irq-bcm2836.c > @@ -167,7 +167,7 @@ static void bcm2836_arm_irqchip_handle_ipi(struct irq_desc *desc) >      chained_irq_exit(chip, desc); >  } > > -static void bcm2836_arm_irqchip_ipi_eoi(struct irq_data *d) > +static void bcm2836_arm_irqchip_ipi_ack(struct irq_data *d) >  { >      int cpu = smp_processor_id(); > > @@ -195,7 +195,7 @@ static struct irq_chip bcm2836_arm_irqchip_ipi = { >      .name        = "IPI", >      .irq_mask    = bcm2836_arm_irqchip_dummy_op, >      .irq_unmask    = bcm2836_arm_irqchip_dummy_op, > -    .irq_eoi    = bcm2836_arm_irqchip_ipi_eoi, > +    .irq_ack    = bcm2836_arm_irqchip_ipi_ack, >      .ipi_send_mask    = bcm2836_arm_irqchip_ipi_send_mask, >  }; 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=-15.3 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER, INCLUDES_PATCH,MAILING_LIST_MULTI,NICE_REPLY_A,SPF_HELO_NONE,SPF_PASS, URIBL_BLOCKED,USER_AGENT_SANE_1 autolearn=ham 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 4D618C2BB48 for ; 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Linux x86_64; rv:68.0) Gecko/20100101 Thunderbird/68.10.0 MIME-Version: 1.0 In-Reply-To: <38f8fbe9ceb7a0adb47e62d62260b297@kernel.org> Content-Language: en-US X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20201215_102142_328372_7EAC55AC X-CRM114-Status: GOOD ( 24.91 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Andrew Lunn , Lorenzo Pieralisi , Jason Cooper , Scott Branden , Ray Jui , Gregory Clement , linux-kernel@vger.kernel.org, Florian Fainelli , Thomas Gleixner , Valentin Schneider , linux-arm-kernel@lists.infradead.org, Sebastian Hesselbarth Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: base64 Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org SGkgTWFyYywKCk9uIDEyLzE1LzIwIDI6MTkgQU0sIE1hcmMgWnluZ2llciB3cm90ZToKPiBIaSBH dW50ZXIsCj4gCj4gT24gMjAyMC0xMi0xNSAwMDoyMSwgR3VlbnRlciBSb2VjayB3cm90ZToKPj4g T24gTW9uLCBOb3YgMDksIDIwMjAgYXQgMDk6NDE6MTlBTSArMDAwMCwgVmFsZW50aW4gU2NobmVp ZGVyIHdyb3RlOgo+Pj4gQXMgZG9uZSBmb3IgdGhlIEFybSBHSUMgaXJxY2hpcHMsIG1vdmUgSVBJ cyB0byBoYW5kbGVfcGVyY3B1X2RldmlkX2lycSgpIGFzCj4+PiBoYW5kbGVfcGVyY3B1X2Rldmlk X2Zhc3Rlb2lfaXBpKCkgaXNuJ3QgYWN0dWFsbHkgcmVxdWlyZWQuCj4+Pgo+Pj4gU2lnbmVkLW9m Zi1ieTogVmFsZW50aW4gU2NobmVpZGVyIDx2YWxlbnRpbi5zY2huZWlkZXJAYXJtLmNvbT4KPj4K Pj4gVGhpcyBwYXRjaCByZXN1bHRzIGluIGJvb3QgZmFpbHVyZXMgKHNpbGVudCBzdGFsbCkgZm9y IHRoZSBxZW11Cj4+IHJhc3BpMiBlbXVsYXRpb24uIFVuZm9ydHVuYXRlbHkgaXQgY2FuIG5vdCBi ZSByZXZlcnRlZCBiZWNhdXNlCj4+IGhhbmRsZV9wZXJjcHVfZGV2aWRfZmFzdGVvaV9pcGkgbm8g bG9uZ2VyIGV4aXN0cyBpbiBuZXh0LTIwMjAxMjE0LAo+PiBzbyBJIGRvbid0IGtub3cgaWYgaXQg aXMgdGhlIG9ubHkgcHJvYmxlbS4KPiAKPiBUaGlzIGlzIG9kZC4gVGhpcyB3b3JrcyBqdXN0IGZp bmUgZm9yIG1lIG9uIGJvdGggdGhlIFJQaTIgYW5kIDMKPiBlbXVsYXRpb24sIHJ1bm5pbmcgYSBm dWxsIERlYmlhbiB1c2Vyc3BhY2UuIENvdWxkIHRoaXMgYmUgY2F1c2VkCj4gYnkgdGhlIHZlcnNp b24gb2YgUUVNVSB5b3UgYXJlIHVzaW5nPyBIZXJlJ3Mgd2hhdCBJIGhhdmU6Cj4gCj4gJCBxZW11 LXN5c3RlbS1hcm0gLS12ZXJzaW9uCj4gUUVNVSBlbXVsYXRvciB2ZXJzaW9uIDUuMS4wIChEZWJp YW4gMTo1LjErZGZzZy00K2IxKQo+IAoKSSB1c2VkIHFlbXUgNS4wIHdoaWNoIC0gdXAgdG8gbm93 IC0gd29ya2VkIGZpbmUuIExldCBtZSB0cnkgd2l0aAo1LjEgYW5kIDUuMi4gU29ycnksIEkgc2hv dWxkIGhhdmUgdHJpZWQgZmlyc3QgYmVmb3JlIGJvdGhlcmluZyB5b3UuCgpHdWVudGVyCgo+IENv dWxkIHlvdSB0cnkgdGhlIGZvbGxvd2luZyBoYWNrIGFuZCBsZXQgbWUga25vdyBpZiB0aGF0IGhl bHBzPwo+IAo+IFRoYW5rcywKPiAKPiDCoMKgwqDCoMKgwqDCoCBNLgo+IAo+IGRpZmYgLS1naXQg YS9kcml2ZXJzL2lycWNoaXAvaXJxLWJjbTI4MzYuYyBiL2RyaXZlcnMvaXJxY2hpcC9pcnEtYmNt MjgzNi5jCj4gaW5kZXggNWY1ZWI4ODc3YzQxLi4yNWM5YTljMDZlNDEgMTAwNjQ0Cj4gLS0tIGEv ZHJpdmVycy9pcnFjaGlwL2lycS1iY20yODM2LmMKPiArKysgYi9kcml2ZXJzL2lycWNoaXAvaXJx LWJjbTI4MzYuYwo+IEBAIC0xNjcsNyArMTY3LDcgQEAgc3RhdGljIHZvaWQgYmNtMjgzNl9hcm1f aXJxY2hpcF9oYW5kbGVfaXBpKHN0cnVjdCBpcnFfZGVzYyAqZGVzYykKPiDCoMKgwqDCoCBjaGFp bmVkX2lycV9leGl0KGNoaXAsIGRlc2MpOwo+IMKgfQo+IAo+IC1zdGF0aWMgdm9pZCBiY20yODM2 X2FybV9pcnFjaGlwX2lwaV9lb2koc3RydWN0IGlycV9kYXRhICpkKQo+ICtzdGF0aWMgdm9pZCBi Y20yODM2X2FybV9pcnFjaGlwX2lwaV9hY2soc3RydWN0IGlycV9kYXRhICpkKQo+IMKgewo+IMKg wqDCoMKgIGludCBjcHUgPSBzbXBfcHJvY2Vzc29yX2lkKCk7Cj4gCj4gQEAgLTE5NSw3ICsxOTUs NyBAQCBzdGF0aWMgc3RydWN0IGlycV9jaGlwIGJjbTI4MzZfYXJtX2lycWNoaXBfaXBpID0gewo+ IMKgwqDCoMKgIC5uYW1lwqDCoMKgwqDCoMKgwqAgPSAiSVBJIiwKPiDCoMKgwqDCoCAuaXJxX21h c2vCoMKgwqAgPSBiY20yODM2X2FybV9pcnFjaGlwX2R1bW15X29wLAo+IMKgwqDCoMKgIC5pcnFf dW5tYXNrwqDCoMKgID0gYmNtMjgzNl9hcm1faXJxY2hpcF9kdW1teV9vcCwKPiAtwqDCoMKgIC5p cnFfZW9pwqDCoMKgID0gYmNtMjgzNl9hcm1faXJxY2hpcF9pcGlfZW9pLAo+ICvCoMKgwqAgLmly cV9hY2vCoMKgwqAgPSBiY20yODM2X2FybV9pcnFjaGlwX2lwaV9hY2ssCj4gwqDCoMKgwqAgLmlw aV9zZW5kX21hc2vCoMKgwqAgPSBiY20yODM2X2FybV9pcnFjaGlwX2lwaV9zZW5kX21hc2ssCj4g wqB9OwoKCl9fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fCmxp bnV4LWFybS1rZXJuZWwgbWFpbGluZyBsaXN0CmxpbnV4LWFybS1rZXJuZWxAbGlzdHMuaW5mcmFk ZWFkLm9yZwpodHRwOi8vbGlzdHMuaW5mcmFkZWFkLm9yZy9tYWlsbWFuL2xpc3RpbmZvL2xpbnV4 LWFybS1rZXJuZWwK