From 459917a71bb20a11ca6dd6f95919f6aeb33b8f93 Mon Sep 17 00:00:00 2001
From: Hollis Blanchard <hollisb@us.ibm.com>
Date: Wed, 2 Aug 2006 13:49:50 -0500
Subject: [PATCH] [POWERPC] correctly allocate domain memory - allocate domain
 RMA in arch_domain_create() - allocate domain RMA with alloc_domheap_pages()
 - replace DOM0_GETMEMLIST hack Signed-off-by: Hollis Blanchard
 <hollisb@us.ibm.com>

---
 xen/arch/powerpc/dom0_ops.c         | 43 ++++++++++++++++++++---------
 xen/arch/powerpc/domain.c           | 27 ++++++++++++++----
 xen/arch/powerpc/powerpc64/ppc970.c |  7 ++++-
 xen/include/asm-powerpc/processor.h |  1 +
 4 files changed, 58 insertions(+), 20 deletions(-)

diff --git a/xen/arch/powerpc/dom0_ops.c b/xen/arch/powerpc/dom0_ops.c
index c83ed3c338..babc92945d 100644
--- a/xen/arch/powerpc/dom0_ops.c
+++ b/xen/arch/powerpc/dom0_ops.c
@@ -40,23 +40,40 @@ long arch_do_dom0_op(struct dom0_op *op, XEN_GUEST_HANDLE(dom0_op_t) u_dom0_op)
     long ret = 0;
 
     switch (op->cmd) {
-    case DOM0_GETMEMLIST: {
-        /* XXX 64M hackage */
-        const int memsize = (64UL<<20);
-        int domain_pfns = memsize>>12;
-        int max_pfns = op->u.getmemlist.max_pfns;
-        int domid = op->u.getmemlist.domain;
+    case DOM0_GETMEMLIST:
+    {
         int i;
+        struct domain *d = find_domain_by_id(op->u.getmemlist.domain);
+        unsigned long max_pfns = op->u.getmemlist.max_pfns;
+        xen_pfn_t mfn;
+        struct list_head *list_ent;
+
+        ret = -EINVAL;
+        if ( d != NULL )
+        {
+            ret = 0;
 
-        for (i = 0; (i < max_pfns) && (i < domain_pfns); i++) {
-            xen_pfn_t mfn = (((domid + 1) * memsize) >> 12) + i;
-            if (copy_to_guest_offset(op->u.getmemlist.buffer, i, &mfn, 1)) {
-                ret = -EFAULT;
-                break;
+            spin_lock(&d->page_alloc_lock);
+            list_ent = d->page_list.next;
+            for ( i = 0; (i < max_pfns) && (list_ent != &d->page_list); i++ )
+            {
+                mfn = page_to_mfn(list_entry(
+                    list_ent, struct page_info, list));
+                if ( copy_to_guest_offset(op->u.getmemlist.buffer,
+                                          i, &mfn, 1) )
+                {
+                    ret = -EFAULT;
+                    break;
+                }
+                list_ent = mfn_to_page(mfn)->list.next;
             }
+            spin_unlock(&d->page_alloc_lock);
+
+            op->u.getmemlist.num_pfns = i;
+            copy_to_guest(u_dom0_op, op, 1);
+            
+            put_domain(d);
         }
-        op->u.getmemlist.num_pfns = i;
-        copy_to_guest(u_dom0_op, op, 1);
     }
     break;
 
diff --git a/xen/arch/powerpc/domain.c b/xen/arch/powerpc/domain.c
index 140b7ec8d2..cd719815d7 100644
--- a/xen/arch/powerpc/domain.c
+++ b/xen/arch/powerpc/domain.c
@@ -73,6 +73,10 @@ unsigned long hypercall_create_continuation(unsigned int op,
 
 int arch_domain_create(struct domain *d)
 {
+    struct page_info *rma;
+    unsigned long rma_base;
+    unsigned long rma_size;
+    unsigned int rma_order;
 
     if (d->domain_id == IDLE_DOMAIN_ID) {
         d->shared_info = (void *)alloc_xenheap_page();
@@ -81,17 +85,28 @@ int arch_domain_create(struct domain *d)
         return 0;
     }
 
-    /* XXX the hackage... hardcode 64M domains */
-    d->arch.rma_base = (64<<20) * (d->domain_id + 1);
-    d->arch.rma_size = (64<<20);
+    rma_order = cpu_rma_order();
+    rma_size = 1UL << rma_order << PAGE_SHIFT;
 
-    printk("clearing RMO: 0x%lx[0x%lx]\n", d->arch.rma_base, d->arch.rma_size);
-    memset((void*)d->arch.rma_base, 0, d->arch.rma_size);
+    /* allocate the real mode area */
+    d->max_pages = 1UL << rma_order;
+    rma = alloc_domheap_pages(d, rma_order, 0);
+    if (NULL == rma)
+        return 1;
+    rma_base = page_to_maddr(rma);
+
+    BUG_ON(rma_base & (rma_size-1)); /* check alignment */
+
+    d->arch.rma_base = rma_base;
+    d->arch.rma_size = rma_size;
+
+    printk("clearing RMO: 0x%lx[0x%lx]\n", rma_base, rma_size);
+    memset((void *)rma_base, 0, rma_size);
 
     htab_alloc(d, LOG_DEFAULT_HTAB_BYTES);
 
     d->shared_info = (shared_info_t *)
-        (rma_addr(&d->arch, RMA_SHARED_INFO) + d->arch.rma_base);
+        (rma_addr(&d->arch, RMA_SHARED_INFO) + rma_base);
 
     d->arch.large_page_sizes = 1;
     d->arch.large_page_shift[0] = 24; /* 16 M for 970s */
diff --git a/xen/arch/powerpc/powerpc64/ppc970.c b/xen/arch/powerpc/powerpc64/ppc970.c
index f1b828fd57..3be55a229c 100644
--- a/xen/arch/powerpc/powerpc64/ppc970.c
+++ b/xen/arch/powerpc/powerpc64/ppc970.c
@@ -31,6 +31,12 @@
 
 #undef SERIALIZE
 
+unsigned int cpu_rma_order(void)
+{
+    /* XXX what about non-HV mode? */
+    return 14; /* 1<<14<<PAGE_SIZE = 64M */
+}
+
 void cpu_initialize(void)
 {
     ulong stack;
@@ -102,7 +108,6 @@ void cpu_initialize(void)
     mthid5(hid5.word);
 
     __asm__ __volatile__("isync; slbia; isync" : : : "memory");
-    
 }
 
 void cpu_init_vcpu(struct vcpu *v)
diff --git a/xen/include/asm-powerpc/processor.h b/xen/include/asm-powerpc/processor.h
index 5944c13c57..863cb194f2 100644
--- a/xen/include/asm-powerpc/processor.h
+++ b/xen/include/asm-powerpc/processor.h
@@ -39,6 +39,7 @@ struct vcpu;
 struct cpu_user_regs;
 extern void show_registers(struct cpu_user_regs *);
 extern void show_execution_state(struct cpu_user_regs *);
+extern unsigned int cpu_rma_order(void);
 extern void cpu_initialize(void);
 extern void cpu_init_vcpu(struct vcpu *);
 extern void save_cpu_sprs(struct vcpu *);
-- 
2.30.2