[Xen-changelog] [xen-unstable] Revert 15127:98cf6c05c32a59ad3f4fcd505ca60348589e6096

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

# HG changeset patch
# User kfraser@xxxxxxxxxxxxxxxxxxxxx
# Date 1179994243 -3600
# Node ID 8c2986a922d37e6a9eac701ec9a0b092a78ceb14
# Parent  f6928d6369999cd063edd361d592579c2483196b
Revert 15127:98cf6c05c32a59ad3f4fcd505ca60348589e6096
Breaks 64-bit build.
---
 xen/arch/x86/domain.c   |  127 ------------------------------------------------
 xen/common/domain.c     |    1 
 xen/include/xen/sched.h |    1 
 3 files changed, 129 deletions(-)

diff -r f6928d636999 -r 8c2986a922d3 xen/arch/x86/domain.c
--- a/xen/arch/x86/domain.c     Tue May 22 15:32:50 2007 +0100
+++ b/xen/arch/x86/domain.c     Thu May 24 09:10:43 2007 +0100
@@ -49,8 +49,6 @@ DEFINE_PER_CPU(struct vcpu *, curr_vcpu)
 DEFINE_PER_CPU(struct vcpu *, curr_vcpu);
 DEFINE_PER_CPU(__u64, efer);
 
-static void unmap_vcpu_info(struct vcpu *v);
-
 static void paravirt_ctxt_switch_from(struct vcpu *v);
 static void paravirt_ctxt_switch_to(struct vcpu *v);
 
@@ -730,116 +728,11 @@ int arch_set_info_guest(
 
 int arch_vcpu_reset(struct vcpu *v)
 {
-    unmap_vcpu_info(v);
     destroy_gdt(v);
     vcpu_destroy_pagetables(v);
     return 0;
 }
 
-/*
- * Copy from an old vcpu to a new one, being careful that events don't
- * get lost.  The new vcpu_info is marked as having pending events;
- * this may cause a spurious upcall into the guest, but that's better
- * than losing events altogether.
- *
- * The caller should restore the event mask state once the new vcpu_info
- * has been installed.
- */
-static unsigned char
-transfer_vcpu_info(const vcpu_info_t *old, vcpu_info_t *new)
-{
-    unsigned char mask = old->evtchn_upcall_mask;
-
-    memcpy(new, old, sizeof(*new));
-
-    new->evtchn_upcall_mask = 1;
-    new->evtchn_upcall_pending = 1;
-    new->evtchn_pending_sel = ~0;
-
-    return mask;
-}
-
-/*
- * Unmap a mapped guest page, if any, and use the standard shared_info
- * vcpu_info location.
- */
-static void
-unmap_vcpu_info(struct vcpu *v)
-{
-    struct domain *d = v->domain;
-    unsigned long mfn;
-    vcpu_info_t *sh_vcpu_info;
-    vcpu_info_t *old_vcpu_info;
-    unsigned char mask;
-
-    sh_vcpu_info = shared_info_addr(d, vcpu_info[v->vcpu_id]);
-
-    if (v->vcpu_info == sh_vcpu_info) {
-        ASSERT(v->vcpu_info_mfn == INVALID_MFN);
-        return;
-    }
-
-    mfn = v->vcpu_info_mfn;
-
-    ASSERT(mfn != INVALID_MFN);
-
-    mask = transfer_vcpu_info(v->vcpu_info, sh_vcpu_info);
-
-    old_vcpu_info = v->vcpu_info;
-
-    v->vcpu_info = sh_vcpu_info;
-    v->vcpu_info_mfn = INVALID_MFN;
-    wmb();                      /* update pointers before unmapping */
-
-    put_page_and_type(mfn_to_page(mfn));
-    unmap_domain_page_global(old_vcpu_info);
-
-    sh_vcpu_info->evtchn_upcall_mask = mask;
-
-    update_vcpu_system_time(v);
-}
-
-/* 
- * Map a guest page in and point the vcpu_info pointer at it.  This
- * makes sure that the vcpu_info is always pointing at a valid piece
- * of memory, and it sets a pending event to make sure that a pending
- * event doesn't get missed.
- */
-static int
-map_vcpu_info(struct vcpu *v, unsigned long mfn, unsigned offset)
-{
-    struct domain *d = v->domain;
-    unsigned char mask;
-    void *mapping;
-    struct vcpu_info *new_info;
-
-    if (offset > (PAGE_SIZE - sizeof(vcpu_info_t)))
-        return -EINVAL;
-
-    mfn = gmfn_to_mfn(d, mfn);
-    if ( !mfn_valid(mfn) ||
-         !get_page_and_type(mfn_to_page(mfn), d, PGT_writable_page) )
-        return -EINVAL;
-
-    mapping = map_domain_page_global(mfn);
-    new_info = (vcpu_info_t *)(mapping + offset);
-
-    mask = transfer_vcpu_info(v->vcpu_info, new_info);
-    wmb();
-
-    unmap_vcpu_info(v);
-
-    v->vcpu_info = new_info;
-    v->vcpu_info_mfn = mfn;
-
-    wmb();
-    new_info->evtchn_upcall_mask = mask;
-
-    update_vcpu_system_time(v);
-
-    return 0;
-}
-
 long
 arch_do_vcpu_op(
     int cmd, struct vcpu *v, XEN_GUEST_HANDLE(void) arg)
@@ -872,26 +765,6 @@ arch_do_vcpu_op(
             vcpu_runstate_get(v, &runstate);
             __copy_to_guest(runstate_guest(v), &runstate, 1);
         }
-
-        break;
-    }
-
-    case VCPUOP_register_vcpu_info:
-    {
-        struct domain *d = v->domain;
-        struct vcpu_register_vcpu_info info;
-
-        rc = -EFAULT;
-        if ( copy_from_guest(&info, arg, 1) )
-            break;
-
-        LOCK_BIGLOCK(d);
-        if (info.mfn == INVALID_MFN) {
-            unmap_vcpu_info(v);
-            rc = 0;
-        } else
-            rc = map_vcpu_info(v, info.mfn, info.offset);
-        UNLOCK_BIGLOCK(d);
 
         break;
     }
diff -r f6928d636999 -r 8c2986a922d3 xen/common/domain.c
--- a/xen/common/domain.c       Tue May 22 15:32:50 2007 +0100
+++ b/xen/common/domain.c       Thu May 24 09:10:43 2007 +0100
@@ -136,7 +136,6 @@ struct vcpu *alloc_vcpu(
 
     v->domain = d;
     v->vcpu_id = vcpu_id;
-    v->vcpu_info_mfn = INVALID_MFN;
 
     v->runstate.state = is_idle_vcpu(v) ? RUNSTATE_running : RUNSTATE_offline;
     v->runstate.state_entry_time = NOW();
diff -r f6928d636999 -r 8c2986a922d3 xen/include/xen/sched.h
--- a/xen/include/xen/sched.h   Tue May 22 15:32:50 2007 +0100
+++ b/xen/include/xen/sched.h   Thu May 24 09:10:43 2007 +0100
@@ -75,7 +75,6 @@ struct vcpu
     int              processor;
 
     vcpu_info_t     *vcpu_info;
-    unsigned long    vcpu_info_mfn;
 
     struct domain   *domain;
 

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