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s390/uv: handle destroy page legacy interface

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Older firmware can return rc=0x107 rrc=0xd for destroy page if the
page is already non-secure. This should be handled like a success
as already done by newer firmware.

Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com>
Fixes: 1a80b54d1c ("s390/uv: add destroy page call")
Reviewed-by: David Hildenbrand <david@redhat.com>
Acked-by: Cornelia Huck <cohuck@redhat.com>
Reviewed-by: Janosch Frank <frankja@linux.ibm.com>
This commit is contained in:
Christian Borntraeger 2020-11-17 20:00:33 +01:00
parent 6cbf1e960f
commit 4c80d05714
1 changed files with 8 additions and 1 deletions
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9
arch/s390/kernel/uv.c
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@ -129,8 +129,15 @@ int uv_destroy_page(unsigned long paddr)
.paddr = paddr .paddr = paddr
}; };
if (uv_call(0, (u64)&uvcb)) if (uv_call(0, (u64)&uvcb)) {
/*
* Older firmware uses 107/d as an indication of a non secure
* page. Let us emulate the newer variant (no-op).
*/
if (uvcb.header.rc == 0x107 && uvcb.header.rrc == 0xd)
return 0;
return -EINVAL; return -EINVAL;
}
return 0; return 0;
} }