Commit 97b95aae authored by David Hildenbrand's avatar David Hildenbrand Committed by Richard Henderson
Browse files

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: default avatarDavid Hildenbrand <david@redhat.com>
Message-Id: <20170622094151.28633-3-david@redhat.com>
Signed-off-by: default avatarRichard Henderson <rth@twiddle.net>
parent faf1c63d

target/s390x/mem_helper.c

+16 −9
Original line number Diff line number Diff line
@@ -1630,16 +1630,23 @@ void HELPER(ipte)(CPUS390XState *env, uint64_t pto, uint64_t vaddr, 
    /* XXX we exploit the fact that Linux passes the exact virtual

       address here - it's not obliged to! */

    if (m4 & 1) {

        if (vaddr & ~VADDR_PX) {

            tlb_flush_page(cs, page);

    } else {

        tlb_flush_page_all_cpus_synced(cs, page);

    }



            /* XXX 31-bit hack */

    if (m4 & 1) {

            tlb_flush_page(cs, page ^ 0x80000000);

        } else {

            /* looks like we don't have a valid virtual address */

            tlb_flush(cs);

        }

    } else {

        if (vaddr & ~VADDR_PX) {

            tlb_flush_page_all_cpus_synced(cs, page);

            /* XXX 31-bit hack */

            tlb_flush_page_all_cpus_synced(cs, page ^ 0x80000000);

        } else {

            /* looks like we don't have a valid virtual address */

            tlb_flush_all_cpus_synced(cs);

        }

    }

}