Date:   Sun, 25 Sep 2022 09:52:21 +0000
From:   Xiaochun XC17 Li <lixc17@...ovo.com>
To:     kernel test robot <lkp@...el.com>,
        Xiaochun Lee <lixiaochun.2888@....com>,
        "nirmal.patel@...ux.intel.com" <nirmal.patel@...ux.intel.com>,
        "jonathan.derrick@...ux.dev" <jonathan.derrick@...ux.dev>
CC:     "kbuild-all@...ts.01.org" <kbuild-all@...ts.01.org>,
        "lpieralisi@...nel.org" <lpieralisi@...nel.org>,
        "robh@...nel.org" <robh@...nel.org>, "kw@...ux.com" <kw@...ux.com>,
        "bhelgaas@...gle.com" <bhelgaas@...gle.com>,
        "linux-pci@...r.kernel.org" <linux-pci@...r.kernel.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: RE: [External] Re: [PATCH v1] PCI: Set no io resource for bridges
 that behind VMD controller

Hi,

> -----Original Message-----
> From: kernel test robot <lkp@...el.com>
> Sent: Friday, September 23, 2022 11:21 PM
> To: Xiaochun Lee <lixiaochun.2888@....com>;
> nirmal.patel@...ux.intel.com; jonathan.derrick@...ux.dev
> Cc: kbuild-all@...ts.01.org; lpieralisi@...nel.org; robh@...nel.org;
> kw@...ux.com; bhelgaas@...gle.com; linux-pci@...r.kernel.org; linux-
> kernel@...r.kernel.org; Xiaochun XC17 Li <lixc17@...ovo.com>
> Subject: [External] Re: [PATCH v1] PCI: Set no io resource for bridges that
> behind VMD controller
> 
> Hi Xiaochun,
> 
> Thank you for the patch! Yet something to improve:
> 
> [auto build test ERROR on helgaas-pci/next] [also build test ERROR on
> linus/master v6.0-rc6 next-20220923] [If your patch is applied to the wrong
> git tree, kindly drop us a note.
Hi, thanks for your reply, this patch is only expected to be applied
on x86 or x64, actually function "is_vmd()" is just defined in
arch/x86/include/asm/pci.h, do we need to support it on arch um?

> And when submitting patch, we suggest to use '--base' as documented in
> https://apc01.safelinks.protection.outlook.com/?url=https%3A%2F%2Fgit-
> scm.com%2Fdocs%2Fgit-format-
> patch%23_base_tree_information&amp;data=05%7C01%7Clixc17%40lenov
> o.com%7C63bd7990b33f4dd9b4bc08da9d77696c%7C5c7d0b28bdf8410caa9
> 34df372b16203%7C0%7C0%7C637995433448231363%7CUnknown%7CTWF
> pbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJX
> VCI6Mn0%3D%7C3000%7C%7C%7C&amp;sdata=TGZ2LnHsHCrJLW7WBBMZ
> lFxv8SIaQNmCGC1bEv2BEDE%3D&amp;reserved=0]
> 
> url:
> https://apc01.safelinks.protection.outlook.com/?url=https%3A%2F%2Fgithu
> b.com%2Fintel-lab-lkp%2Flinux%2Fcommits%2FXiaochun-Lee%2FPCI-Set-
> no-io-resource-for-bridges-that-behind-VMD-controller%2F20220913-
> 213745&amp;data=05%7C01%7Clixc17%40lenovo.com%7C63bd7990b33f4d
> d9b4bc08da9d77696c%7C5c7d0b28bdf8410caa934df372b16203%7C0%7C0
> %7C637995433448231363%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLj
> AwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C3000%7C
> %7C%7C&amp;sdata=3NULvkgYg0fWTopgYY5EYHsLIBPdTEcMxbz5Tj12D0E%
> 3D&amp;reserved=0
> base:
> https://apc01.safelinks.protection.outlook.com/?url=https%3A%2F%2Fgit.k
> ernel.org%2Fpub%2Fscm%2Flinux%2Fkernel%2Fgit%2Fhelgaas%2Fpci.git&a
> mp;data=05%7C01%7Clixc17%40lenovo.com%7C63bd7990b33f4dd9b4bc08
> da9d77696c%7C5c7d0b28bdf8410caa934df372b16203%7C0%7C0%7C63799
> 5433448231363%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiL
> CJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C3000%7C%7C%7C&a
> mp;sdata=ZTZ7kKlwOk7IB3MN0rRwqHaNGGl4OiwrR7AjImBbTqc%3D&amp;
> reserved=0 next
> config: um-allmodconfig
> (https://apc01.safelinks.protection.outlook.com/?url=https%3A%2F%2Fdow
> nload.01.org%2F0day-
> ci%2Farchive%2F20220924%2F202209240714.ronvmf1X-
> lkp%40intel.com%2Fconfig&amp;data=05%7C01%7Clixc17%40lenovo.com%
> 7C63bd7990b33f4dd9b4bc08da9d77696c%7C5c7d0b28bdf8410caa934df372
> b16203%7C0%7C0%7C637995433448231363%7CUnknown%7CTWFpbGZsb3
> d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0
> %3D%7C3000%7C%7C%7C&amp;sdata=6xMM7Fh9bKGnzBlmeu8kki3yvGGQ
> 2k%2FKCp%2BqvoLt4zU%3D&amp;reserved=0)
> compiler: gcc-11 (Debian 11.3.0-5) 11.3.0 reproduce (this is a W=1 build):
>         #
> https://apc01.safelinks.protection.outlook.com/?url=https%3A%2F%2Fgithu
> b.com%2Fintel-lab-
> lkp%2Flinux%2Fcommit%2Ff97a8ba561d7cf5a755c8f42421138e8b1073cf9&
> amp;data=05%7C01%7Clixc17%40lenovo.com%7C63bd7990b33f4dd9b4bc0
> 8da9d77696c%7C5c7d0b28bdf8410caa934df372b16203%7C0%7C0%7C6379
> 95433448387557%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAi
> LCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C3000%7C%7C%7C&
> amp;sdata=4mjCA86AEbwN9eIiw1%2BLUPlf0%2BV2juqoDo7ojKSMweY%3D
> &amp;reserved=0
>         git remote add linux-review
> https://apc01.safelinks.protection.outlook.com/?url=https%3A%2F%2Fgithu
> b.com%2Fintel-lab-
> lkp%2Flinux&amp;data=05%7C01%7Clixc17%40lenovo.com%7C63bd7990b3
> 3f4dd9b4bc08da9d77696c%7C5c7d0b28bdf8410caa934df372b16203%7C0%
> 7C0%7C637995433448387557%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC
> 4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C3000
> %7C%7C%7C&amp;sdata=YusFni1tvPN89d2e%2B8yADL3jbwjuydLs0RD3NSjj
> 2MA%3D&amp;reserved=0
>         git fetch --no-tags linux-review Xiaochun-Lee/PCI-Set-no-io-resource-
> for-bridges-that-behind-VMD-controller/20220913-213745
>         git checkout f97a8ba561d7cf5a755c8f42421138e8b1073cf9
>         # save the config file
>         mkdir build_dir && cp config build_dir/.config
>         make W=1 O=build_dir ARCH=um SHELL=/bin/bash
> 
> If you fix the issue, kindly add following tag where applicable
> | Reported-by: kernel test robot <lkp@...el.com>
> 
> All errors (new ones prefixed by >>):
> 
>    drivers/pci/quirks.c: In function 'quirk_vmd_no_iosize':
> >> drivers/pci/quirks.c:5985:13: error: implicit declaration of function
> >> 'is_vmd' [-Werror=implicit-function-declaration]
>     5985 |         if (is_vmd(bridge->bus) && bridge->is_hotplug_bridge) {
>          |             ^~~~~~
>    cc1: some warnings being treated as errors
> 
> 
> vim +/is_vmd +5985 drivers/pci/quirks.c
> 
>   5959
>   5960	#if defined(CONFIG_X86_64) || defined(CONFIG_X86)
>   5961	/*
>   5962	 * VMD-enabled root ports use Enhanced Configuration Access
> Mechanism (ECAM)
>   5963	 * access PCI Express configuration space, and offer VMD_CFGBAR
> as
>   5964	 * base of PCI Express configuration space for the bridges behind it.
>   5965	 * The configuration space includes IO resources, but these IO
>   5966	 * resources are not actually used on X86, especially the NVMes as
>   5967	 * device connnected on this hot plug bridges, and it can result
>   5968	 * in BAR#13 assign IO resource failed. So we clear IO resources
>   5969	 * by setting an IO base value greater than limit to these bridges.
>   5970	 * Hence, append kernel parameter "pci=hpiosize=0KB" can avoid
>   5971	 * this BAR#13 failed messages show out.
>   5972	 */
>   5973	static void quirk_vmd_no_iosize(struct pci_dev *bridge)
>   5974	{
>   5975		u8 io_base_lo, io_limit_lo;
>   5976		u16 io_low;
>   5977		u32 io_upper16;
>   5978		unsigned long io_mask,  base, limit;
>   5979
>   5980		io_mask = PCI_IO_RANGE_MASK;
>   5981		if (bridge->io_window_1k)
>   5982			io_mask = PCI_IO_1K_RANGE_MASK;
>   5983
>   5984		/* VMD Domain */
> > 5985		if (is_vmd(bridge->bus) && bridge->is_hotplug_bridge) {
> 
> --
> 0-DAY CI Kernel Test Service
> https://apc01.safelinks.protection.outlook.com/?url=https%3A%2F%2F01.or
> g%2Flkp&amp;data=05%7C01%7Clixc17%40lenovo.com%7C63bd7990b33f4
> dd9b4bc08da9d77696c%7C5c7d0b28bdf8410caa934df372b16203%7C0%7C0
> %7C637995433448387557%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLj
> AwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C3000%7C
> %7C%7C&amp;sdata=4qYtyE86mw9VyFbB3QKJqtldq6relV2Cunv9STAmmqA
> %3D&amp;reserved=0

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