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| author |   Alexander Graf <agraf@suse.de> | 2011-07-14 11:45:07 +0200 |
|---|---|---|
| committer | Alexander Graf <agraf@suse.de> | 2011-11-14 17:47:26 +0100 |
| commit | 09ed75f7848522f5d6f7ccca4bc9d0ab76006142 (patch) | |
| tree | b2f8e962952a4d9861c7807fe4024840b3cf3d5f /target-s390x/op_helper.c | |
| parent | s390x: add ldeb instruction (diff) | |
| download | qemu-kvm-09ed75f7848522f5d6f7ccca4bc9d0ab76006142.tar.gz qemu-kvm-09ed75f7848522f5d6f7ccca4bc9d0ab76006142.tar.bz2 qemu-kvm-09ed75f7848522f5d6f7ccca4bc9d0ab76006142.zip | |
s390x: make ipte 31-bit aware
When running 31-bit code we can potentially map the same virtual
address twice - once as 0x0yyyyyyy and once as 0x8yyyyyyy, because
the upper bit gets ignored.
This also should be reflected in the tlb invalidation path, so we
really invalidate also the transparently created tlb entries.
Signed-off-by: Alexander Graf <agraf@suse.de>
Diffstat (limited to 'target-s390x/op_helper.c')
| -rw-r--r-- | target-s390x/op_helper.c | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/target-s390x/op_helper.c b/target-s390x/op_helper.c index e5941187a..2f46bdd0f 100644 --- a/target-s390x/op_helper.c +++ b/target-s390x/op_helper.c @@ -2950,6 +2950,13 @@ void HELPER(ipte)(uint64_t pte_addr, uint64_t vaddr) /* XXX we exploit the fact that Linux passes the exact virtual address here - it's not obliged to! */ tlb_flush_page(env, page); + + /* XXX 31-bit hack */ + if (page & 0x80000000) { + tlb_flush_page(env, page & ~0x80000000); + } else { + tlb_flush_page(env, page | 0x80000000); + } } /* flush local tlb */ |