Commit 4c80d057 authored Nov 17, 2020 by Christian Borntraeger

s390/uv: handle destroy page legacy interface



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: 1a80b54d ("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>

parent 6cbf1e96

arch/s390/kernel/uv.c

+8 −1

Original line number	Diff line number	Diff line
		@@ -129,8 +129,15 @@ int uv_destroy_page(unsigned long 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 0;
		}

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