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author | Eric Farman <farman@linux.ibm.com> | 2022-11-21 19:58:36 +0300 |
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committer | Alexander Gordeev <agordeev@linux.ibm.com> | 2022-12-05 17:01:36 +0300 |
commit | 5de2322d7b8ecba37152334ebaaddf687fd63a38 (patch) | |
tree | b0c3e15c0f35a63ec80f790cfe2039a77a9152f7 /arch/s390/boot/ipl_parm.c | |
parent | 21c7996917cb5c9d8669409b00d990b75d22a849 (diff) | |
download | linux-5de2322d7b8ecba37152334ebaaddf687fd63a38.tar.xz |
vfio/ccw: identify CCW data addresses as physical
The CCW data address created by vfio-ccw is that of an IDAL
built by this code. Since this address is used by real hardware,
it should be a physical address rather than a virtual one.
Let's clarify it as such in the ORB.
Similarly, once the I/O has completed the memory for that IDAL
needs to be released, so convert the CCW data address back to
a virtual address so that kfree() can process it.
Note: this currently doesn't fix a real bug, since virtual
addresses are identical to physical ones.
Signed-off-by: Eric Farman <farman@linux.ibm.com>
Reviewed-by: Matthew Rosato <mjrosato@linux.ibm.com>
Reviewed-by: Nico Boehr <nrb@linux.ibm.com>
Signed-off-by: Alexander Gordeev <agordeev@linux.ibm.com>
Link: https://lore.kernel.org/r/20221121165836.283781-3-farman@linux.ibm.com
Diffstat (limited to 'arch/s390/boot/ipl_parm.c')
0 files changed, 0 insertions, 0 deletions