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RE: executing user code to test qemu driver

From: Shaked Matzner
Subject: RE: executing user code to test qemu driver
Date: Wed, 4 Nov 2020 18:18:45 +0000

Hey again,

I also see that when I try open the device after insmod and mknnodev by:

  int device_fd = open("/dev/lkmc_pci",O_RDWR);

fails due to permission issue, I tried to chmod it from the device but it does not work as well.

What is the proper way to add access permission for the device from the user code?


     Shaked Matzner

From: Shaked Matzner
Sent: Wednesday, November 4, 2020 7:06 PM
To: qemu-devel@nongnu.org
Subject: executing user code to test qemu driver


Hey all,

So I’ve created a small test to check ioctl calls of my pci with dma driver, under a shared directory (which is mounted to the qemu-x86-64 instance).

I’ve just tried to compile it with gcc (gcc test_dma.c -o test_dma_exec)

I’ve tried to execute it from the qemu but it said it could not found the file, also I wonder how does it recognize my kernel and devices),

How should I compile it and run the code?


     Shaked Matzner

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