[Xen-changelog] [IA64] ptc.ga for SMP-g

[Xen patchbot -unstable <patchbot-unstable@xxxxxxxxxxxxxxxxxxx>]

# HG changeset patch
# User awilliam@xxxxxxxxxxx
# Node ID 7e3cbc40967620fb6b89eff6d931269d21416546
# Parent  27050b1390cf74cf6fc1579c0f6bdceb6eeb3e6f
[IA64] ptc.ga for SMP-g

ptc.ga extended for SMP-g.

Signed-off-by: Tristan Gingold <tristan.gingold@xxxxxxxx>

diff -r 27050b1390cf -r 7e3cbc409676 xen/arch/ia64/xen/vcpu.c
--- a/xen/arch/ia64/xen/vcpu.c  Mon Mar 27 15:35:31 2006 -0700
+++ b/xen/arch/ia64/xen/vcpu.c  Mon Mar 27 15:36:47 2006 -0700
@@ -1865,16 +1865,63 @@ IA64FAULT vcpu_ptc_g(VCPU *vcpu, UINT64 
        return IA64_ILLOP_FAULT;
 }
 
+#if defined(CONFIG_XEN_SMP) && defined(VHPT_GLOBAL)
+struct ptc_ga_args {
+       unsigned long vadr;
+       unsigned long addr_range;
+};
+
+static void ptc_ga_remote_func (void *varg)
+{
+       struct ptc_ga_args *args = (struct ptc_ga_args *)varg;
+       vhpt_flush_address (args->vadr, args->addr_range);
+}
+#endif
+
 IA64FAULT vcpu_ptc_ga(VCPU *vcpu,UINT64 vadr,UINT64 addr_range)
 {
        // FIXME: validate not flushing Xen addresses
        // if (Xen address) return(IA64_ILLOP_FAULT);
        // FIXME: ??breaks if domain PAGE_SIZE < Xen PAGE_SIZE
 //printf("######## vcpu_ptc_ga(%p,%p) ##############\n",vadr,addr_range);
+
+#ifdef CONFIG_XEN_SMP
+       struct domain *d = vcpu->domain;
+       struct vcpu *v;
+       struct ptc_ga_args args;
+
+       args.vadr = vadr;
+       args.addr_range = addr_range;
+
+       /* This method is very conservative and should be optimized:
+          - maybe IPI calls can be avoided,
+          - a processor map can be built to avoid duplicate purge
+          - maybe ptc.ga can be replaced by ptc.l+invala.
+          Hopefully, it has no impact when UP.
+       */
+       for_each_vcpu (d, v) {
+               if (v != vcpu) {
+                       /* Purge tc entry.
+                          Can we do this directly ?  Well, this is just a
+                          single atomic write.  */
+                       vcpu_purge_tr_entry(&PSCBX(v,dtlb));
+                       vcpu_purge_tr_entry(&PSCBX(v,itlb));
+#ifdef VHPT_GLOBAL
+                       /* Flush VHPT on remote processors.
+                          FIXME: invalidate directly the entries? */
+                       smp_call_function_single
+                               (v->processor, &ptc_ga_remote_func,
+                                &args, 0, 1);
+#endif
+               }
+       }
+#endif
+
 #ifdef VHPT_GLOBAL
        vhpt_flush_address(vadr,addr_range);
 #endif
        ia64_global_tlb_purge(vadr,vadr+addr_range,PAGE_SHIFT);
+       /* Purge tc.  */
        vcpu_purge_tr_entry(&PSCBX(vcpu,dtlb));
        vcpu_purge_tr_entry(&PSCBX(vcpu,itlb));
        return IA64_NO_FAULT;

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