diff options
| author | Christian Borntraeger <borntraeger@de.ibm.com> | 2020-11-17 20:00:33 +0100 |
|---|---|---|
| committer | Christian Borntraeger <borntraeger@de.ibm.com> | 2020-11-18 13:08:49 +0100 |
| commit | 4c80d05714d347405865802b7098f1c97362cbef (patch) | |
| tree | bc8947b333ace0bf85174b3c35f02bdb45365d5b /arch/s390/kernel/uv.c | |
| parent | KVM: s390: remove diag318 reset code (diff) | |
| download | linux-4c80d05714d347405865802b7098f1c97362cbef.tar.xz linux-4c80d05714d347405865802b7098f1c97362cbef.zip | |
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: 1a80b54d1ce1 ("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>
Diffstat (limited to 'arch/s390/kernel/uv.c')
| -rw-r--r-- | arch/s390/kernel/uv.c | 9 |
1 files changed, 8 insertions, 1 deletions
diff --git a/arch/s390/kernel/uv.c b/arch/s390/kernel/uv.c index 14bd9d58edc9..883bfed9f5c2 100644 --- a/arch/s390/kernel/uv.c +++ b/arch/s390/kernel/uv.c @@ -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; } |