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Date:   Fri, 19 May 2023 16:10:14 +0100
From:   Jonathan Cameron <Jonathan.Cameron@Huawei.com>
To:     Davidlohr Bueso <dave@stgolabs.net>
CC:     LiuLele <liu.lele@qq.com>, <dave.jiang@intel.com>,
        <alison.schofield@intel.com>, <bhelgaas@google.com>,
        <bwidawsk@kernel.org>, <dan.j.williams@intel.com>,
        <helgaas@kernel.org>, <ira.weiny@intel.com>,
        <linux-acpi@vger.kernel.org>, <linux-cxl@vger.kernel.org>,
        <linux-kernel@vger.kernel.org>, <linux-pci@vger.kernel.org>,
        <rostedt@goodmis.org>, <vishal.l.verma@intel.com>
Subject: Re: CXL memory device not created correctly
Message-ID: <20230519161014.00003002@Huawei.com>
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On Thu, 18 May 2023 18:38:46 -0700
Davidlohr Bueso <dave@stgolabs.net> wrote:

> On Fri, 19 May 2023, LiuLele wrote:
> 
> >In my testing CXL device /sys/bus/cxl/devices/mem0  not created, and the get error messages :
> >
> >```
> >cxl_pci 0000:0d:00.0: Failed to get interrupt for event Info log
> >```
> >
> >My test environment is a qemu CXL emulator with qemu v8.0.0, Linux kernel v6.3.0.
> >While with kernel 5.9.13,  /sys/bus/cxl/devices/mem0  can be created.  
> 
> Yes, this can be annoying and would argue the probe should not error out.
> Regardless, the actual qemu support is in Jonathan's tree:
> 
> https://gitlab.com/jic23/qemu/-/commit/a04e6476df363d1f6bc160577b30dda6564d3f67

That just failed to make it into an upstream pull request today due to some
bugs in a the poison list set that came before it :( 

v6 or poison list and events support are both on list now and hopefully will make
this QEMU cycle so be in 8.1

Jonathan


> 
> Thanks,
> Davidlohr