target/s390x: Improve heuristic for ipte
If only the page index is set, most likely we don't have a valid virtual address. Let's do a full tlb flush for that case. Signed-off-by: David Hildenbrand <david@redhat.com> Message-Id: <20170622094151.28633-3-david@redhat.com> Signed-off-by: Richard Henderson <rth@twiddle.net>
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@ -1630,16 +1630,23 @@ void HELPER(ipte)(CPUS390XState *env, uint64_t pto, uint64_t vaddr,
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/* XXX we exploit the fact that Linux passes the exact virtual
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address here - it's not obliged to! */
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if (m4 & 1) {
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tlb_flush_page(cs, page);
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if (vaddr & ~VADDR_PX) {
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tlb_flush_page(cs, page);
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/* XXX 31-bit hack */
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tlb_flush_page(cs, page ^ 0x80000000);
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} else {
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/* looks like we don't have a valid virtual address */
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tlb_flush(cs);
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}
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} else {
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tlb_flush_page_all_cpus_synced(cs, page);
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}
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/* XXX 31-bit hack */
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if (m4 & 1) {
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tlb_flush_page(cs, page ^ 0x80000000);
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} else {
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tlb_flush_page_all_cpus_synced(cs, page ^ 0x80000000);
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if (vaddr & ~VADDR_PX) {
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tlb_flush_page_all_cpus_synced(cs, page);
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/* XXX 31-bit hack */
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tlb_flush_page_all_cpus_synced(cs, page ^ 0x80000000);
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} else {
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/* looks like we don't have a valid virtual address */
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tlb_flush_all_cpus_synced(cs);
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}
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}
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}
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