[Xen-changelog] [xen-unstable] [IA64] remove unused vmx/mm.c file

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

# HG changeset patch
# User awilliam@xxxxxxxxxxx
# Node ID a7c6b1c5507c4365862d171edb7feb7a84c25060
# Parent  463658ccf683ec8b56734e830f57a795d727a099
[IA64] remove unused vmx/mm.c file

Signed-off-by: Tristan Gingold <tristan.gingold@xxxxxxxx>
---
 xen/arch/ia64/vmx/mm.c |  153 -------------------------------------------------
 1 files changed, 153 deletions(-)

diff -r 463658ccf683 -r a7c6b1c5507c xen/arch/ia64/vmx/mm.c
--- a/xen/arch/ia64/vmx/mm.c    Sun Oct 22 14:12:30 2006 -0600
+++ /dev/null   Thu Jan 01 00:00:00 1970 +0000
@@ -1,153 +0,0 @@
-/******************************************************************************
- * arch/ia64/mm.c
- * 
- * Copyright (c) 2002-2005 K A Fraser
- * Copyright (c) 2004 Christian Limpach
- * Copyright (c) 2005, Intel Corporation.
- *  Xuefei Xu (Anthony Xu) (Anthony.xu@xxxxxxxxx)
- * 
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- * 
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU General Public License for more details.
- * 
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
- */
-
-/*
- * A description of the x86 page table API:
- * 
- * Domains trap to do_mmu_update with a list of update requests.
- * This is a list of (ptr, val) pairs, where the requested operation
- * is *ptr = val.
- * 
- * Reference counting of pages:
- * ----------------------------
- * Each page has two refcounts: tot_count and type_count.
- * 
- * TOT_COUNT is the obvious reference count. It counts all uses of a
- * physical page frame by a domain, including uses as a page directory,
- * a page table, or simple mappings via a PTE. This count prevents a
- * domain from releasing a frame back to the free pool when it still holds
- * a reference to it.
- * 
- * TYPE_COUNT is more subtle. A frame can be put to one of three
- * mutually-exclusive uses: it might be used as a page directory, or a
- * page table, or it may be mapped writable by the domain [of course, a
- * frame may not be used in any of these three ways!].
- * So, type_count is a count of the number of times a frame is being 
- * referred to in its current incarnation. Therefore, a page can only
- * change its type when its type count is zero.
- * 
- * Pinning the page type:
- * ----------------------
- * The type of a page can be pinned/unpinned with the commands
- * MMUEXT_[UN]PIN_L?_TABLE. Each page can be pinned exactly once (that is,
- * pinning is not reference counted, so it can't be nested).
- * This is useful to prevent a page's type count falling to zero, at which
- * point safety checks would need to be carried out next time the count
- * is increased again.
- * 
- * A further note on writable page mappings:
- * -----------------------------------------
- * For simplicity, the count of writable mappings for a page may not
- * correspond to reality. The 'writable count' is incremented for every
- * PTE which maps the page with the _PAGE_RW flag set. However, for
- * write access to be possible the page directory entry must also have
- * its _PAGE_RW bit set. We do not check this as it complicates the 
- * reference counting considerably [consider the case of multiple
- * directory entries referencing a single page table, some with the RW
- * bit set, others not -- it starts getting a bit messy].
- * In normal use, this simplification shouldn't be a problem.
- * However, the logic can be added if required.
- * 
- * One more note on read-only page mappings:
- * -----------------------------------------
- * We want domains to be able to map pages for read-only access. The
- * main reason is that page tables and directories should be readable
- * by a domain, but it would not be safe for them to be writable.
- * However, domains have free access to rings 1 & 2 of the Intel
- * privilege model. In terms of page protection, these are considered
- * to be part of 'supervisor mode'. The WP bit in CR0 controls whether
- * read-only restrictions are respected in supervisor mode -- if the 
- * bit is clear then any mapped page is writable.
- * 
- * We get round this by always setting the WP bit and disallowing 
- * updates to it. This is very unlikely to cause a problem for guest
- * OS's, which will generally use the WP bit to simplify copy-on-write
- * implementation (in that case, OS wants a fault when it writes to
- * an application-supplied buffer).
- */
-
-#include <xen/config.h>
-//#include <public/xen.h>
-#include <xen/init.h>
-#include <xen/lib.h>
-#include <xen/mm.h>
-#include <xen/errno.h>
-#include <asm/vmx_vcpu.h>
-#include <asm/vmmu.h>
-#include <asm/regionreg.h>
-#include <asm/vmx_mm_def.h>
-/*
-        uregs->ptr is virtual address
-        uregs->val is pte value
- */
-int vmx_do_mmu_update(mmu_update_t *ureqs,u64 count,u64 *pdone,u64 foreigndom)
-{
-    int i,cmd;
-    u64 mfn, gpfn;
-    VCPU *vcpu;
-    mmu_update_t req;
-    /* ia64_rr rr; */
-    thash_cb_t *hcb;
-    /* thash_data_t entry={0},*ovl; */
-    vcpu = current;
-    /* search_section_t sections; */
-    hcb = vmx_vcpu_get_vtlb(vcpu);
-    for ( i = 0; i < count; i++ )
-    {
-        copy_from_user(&req, ureqs, sizeof(req));
-        cmd = req.ptr&3;
-        req.ptr &= ~3;
-/*
-        if(cmd ==MMU_NORMAL_PT_UPDATE){
-            entry.page_flags = req.val;
-            entry.locked = 1;
-            entry.tc = 1;
-            entry.cl = DSIDE_TLB;
-            rr = vmx_vcpu_rr(vcpu, req.ptr);
-            entry.ps = rr.ps;
-            entry.key = rr.rid;
-            entry.rid = rr.rid;
-            entry.vadr = PAGEALIGN(req.ptr,entry.ps);
-            sections.tr = 1;
-            sections.tc = 0;
-            ovl = thash_find_overlap(hcb, &entry, sections);
-            if (ovl) {
-                  // generate MCA.
-                panic("Tlb conflict!!");
-                return -1;
-            }
-            thash_purge_and_insert(hcb, &entry, req.ptr);
-        }else
- */
-        if(cmd == MMU_MACHPHYS_UPDATE){
-            mfn = req.ptr >>PAGE_SHIFT;
-            gpfn = req.val;
-            set_machinetophys(mfn,gpfn);
-        }else{
-            printf("Unkown command of mmu_update:ptr: %lx,val: %lx 
\n",req.ptr,req.val);
-            while(1);
-        }
-        ureqs ++;
-    }
-    return 0;
-}

_______________________________________________
Xen-changelog mailing list
Xen-changelog@xxxxxxxxxxxxxxxxxxx
http://lists.xensource.com/xen-changelog