WARNING - OLD ARCHIVES

This is an archived copy of the Xen.org mailing list, which we have preserved to ensure that existing links to archives are not broken. The live archive, which contains the latest emails, can be found at http://lists.xen.org/
   
 
 
Xen 
 
Home Products Support Community News
 
   
 

xen-devel

Re: [Xen-devel] [PATCH 5/5 TAKE 2] xenoprof: make xen xenoprof code arch

I sent out my old patch. Sorry for confusion.

# HG changeset patch
# User yamahata@xxxxxxxxxxxxx
# Date 1163658590 -32400
# Node ID 2619990fdf3716dacd62f673d1259df26e717e57
# Parent  9bf71c7abb2de71ac233c24d821978ce2e6cc961
make xenoprof arch-generic with dynamic mapping/unmapping xenoprof buffer
support and auto translated mode support.
renamed xenoprof_get_buffer::buf_maddr, xenoprof_passive::buf_maddr to
xenoprof_get_buffer::buf_gmaddr, xenoprof_passive::buf_gmaddr
to support auto translated mode. With auto translated mode enabled,
it is gmaddr, not maddr.
PATCHNAME: make_xenoprof_of_xen_side_arch_generic

Signed-off-by: Isaku Yamahata <yamahata@xxxxxxxxxxxxx>

diff -r 9bf71c7abb2d -r 2619990fdf37 
linux-2.6-xen-sparse/arch/i386/oprofile/xenoprof.c
--- a/linux-2.6-xen-sparse/arch/i386/oprofile/xenoprof.c        Tue Nov 14 
15:34:22 2006 +0900
+++ b/linux-2.6-xen-sparse/arch/i386/oprofile/xenoprof.c        Thu Nov 16 
15:29:50 2006 +0900
@@ -93,7 +93,7 @@ int xenoprof_arch_map_shared_buffer(stru
 
        if ( (ret = direct_kernel_remap_pfn_range(
                      (unsigned long)area->addr,
-                     get_buffer->buf_maddr >> PAGE_SHIFT,
+                     get_buffer->buf_gmaddr >> PAGE_SHIFT,
                      npages * PAGE_SIZE, __pgprot(_KERNPG_TABLE),
                      DOMID_SELF)) ) {
                vunmap(area->addr);
@@ -127,7 +127,7 @@ int xenoprof_arch_set_passive(struct xen
 
        ret = direct_kernel_remap_pfn_range(
                (unsigned long)area->addr,
-               pdomain->buf_maddr >> PAGE_SHIFT,
+               pdomain->buf_gmaddr >> PAGE_SHIFT,
                npages * PAGE_SIZE, prot, DOMID_SELF);
        if (ret) {
                vunmap(area->addr);
diff -r 9bf71c7abb2d -r 2619990fdf37 xen/arch/x86/oprofile/nmi_int.c
--- a/xen/arch/x86/oprofile/nmi_int.c   Tue Nov 14 15:34:22 2006 +0900
+++ b/xen/arch/x86/oprofile/nmi_int.c   Thu Nov 16 15:29:50 2006 +0900
@@ -33,7 +33,6 @@ static unsigned long saved_lvtpc[NR_CPUS
 #define VIRQ_BITMASK_SIZE (MAX_OPROF_DOMAINS/32 + 1)
 extern int active_domains[MAX_OPROF_DOMAINS];
 extern unsigned int adomains;
-extern struct domain *primary_profiler;
 extern struct domain *adomain_ptrs[MAX_OPROF_DOMAINS];
 extern unsigned long virq_ovf_pending[VIRQ_BITMASK_SIZE];
 extern int is_active(struct domain *d);
@@ -337,10 +336,10 @@ int nmi_init(int *num_events, int *is_pr
                return -ENODEV;
        }
 
-       if (primary_profiler == NULL) {
+       if (xenoprof_primary_profiler == NULL) {
                /* For now, only dom0 can be the primary profiler */
                if (current->domain->domain_id == 0) {
-                       primary_profiler = current->domain;
+                       xenoprof_primary_profiler = current->domain;
                        prim = 1;
                }
        }
diff -r 9bf71c7abb2d -r 2619990fdf37 xen/common/xenoprof.c
--- a/xen/common/xenoprof.c     Tue Nov 14 15:34:22 2006 +0900
+++ b/xen/common/xenoprof.c     Thu Nov 16 15:29:50 2006 +0900
@@ -2,15 +2,17 @@
  * Copyright (C) 2005 Hewlett-Packard Co.
  * written by Aravind Menon & Jose Renato Santos
  *            (email: xenoprof@xxxxxxxxxxxxx)
+ *
+ * arch generic xenoprof and IA64 support.
+ * dynamic map/unmap xenoprof buffer support.
  * Copyright (c) 2006 Isaku Yamahata <yamahata at valinux co jp>
  *                    VA Linux Systems Japan K.K.
- * arch generic xenoprof and IA64 support.
  */
 
 #include <xen/guest_access.h>
 #include <xen/sched.h>
 #include <public/xenoprof.h>
-#include <asm/hvm/support.h>
+#include <asm/shadow.h>
 
 /* Limit amount of pages used for shared buffer (per domain) */
 #define MAX_OPROF_SHARED_PAGES 32
@@ -26,7 +28,7 @@ unsigned int pdomains;
 unsigned int pdomains;
 
 unsigned int activated;
-struct domain *primary_profiler;
+struct domain *xenoprof_primary_profiler;
 int xenoprof_state = XENOPROF_IDLE;
 
 u64 total_samples;
@@ -90,10 +92,58 @@ static void xenoprof_reset_buf(struct do
     }
 }
 
+static int
+share_xenoprof_page_with_guest(struct domain* d, unsigned long mfn, int npages)
+{
+    int i;
+    
+    /* Share pages so that kernel can map it */
+    for (i = 0; i < npages; i++) {
+        struct page_info* page = mfn_to_page(mfn + i);
+        if ((page->count_info & (PGC_allocated|PGC_count_mask)) != 0) {
+            gdprintk(XENLOG_INFO, "%s: mfn 0x%lx page->count_info 0x%x\n",
+                     __func__, mfn + i, page->count_info);
+            return -EBUSY;
+        }
+        page->count_info = 0;
+        page_set_owner(page, NULL);
+    }
+
+    for (i = 0; i < npages; i++)
+        share_xen_page_with_guest(mfn_to_page(mfn + i), d, XENSHARE_writable);
+    return 0;
+}
+
+static void
+unshare_xenoprof_page_with_guest(unsigned long mfn, int npages)
+{
+    int i;
+
+    for (i = 0; i < npages; i++) {
+        struct page_info* page = mfn_to_page(mfn + i);
+        BUG_ON(page_get_owner(page) != current->domain);
+        if (test_and_clear_bit(_PGC_allocated, &page->count_info))
+            put_page(page);
+    }
+}
+
+static void
+xenoprof_shared_gmfn_with_guest(struct domain* d,
+                                unsigned long maddr, unsigned long gmaddr,
+                                int npages)
+{
+    int i;
+    
+    for (i = 0; i < npages; i++, maddr += PAGE_SIZE, gmaddr += PAGE_SIZE) {
+        BUG_ON(page_get_owner(maddr_to_page(maddr)) != d);
+        xenoprof_shared_gmfn(d, gmaddr, maddr);
+    }
+}
+
 static char *alloc_xenoprof_buf(struct domain *d, int npages)
 {
     char *rawbuf;
-    int i, order;
+    int order;
 
     /* allocate pages to store sample buffer shared with domain */
     order  = get_order_from_pages(npages);
@@ -103,12 +153,6 @@ static char *alloc_xenoprof_buf(struct d
         printk("alloc_xenoprof_buf(): memory allocation failed\n");
         return 0;
     }
-
-    /* Share pages so that kernel can map it */
-    for ( i = 0; i < npages; i++ )
-        share_xen_page_with_guest(
-            virt_to_page(rawbuf + i * PAGE_SIZE), 
-            d, XENSHARE_writable);
 
     return rawbuf;
 }
@@ -269,6 +313,7 @@ static void reset_passive(struct domain 
     if ( x == NULL )
         return;
 
+    unshare_xenoprof_page_with_guest(virt_to_mfn(x->rawbuf), x->npages);
     x->domain_type = XENOPROF_DOMAIN_IGNORED;
 
     return;
@@ -344,10 +389,20 @@ static int add_passive_list(XEN_GUEST_HA
         return -ENOMEM;
     }
 
+    ret = share_xenoprof_page_with_guest(current->domain,
+                virt_to_mfn(d->xenoprof->rawbuf), d->xenoprof->npages);
+    if (ret) {
+        put_domain(d);
+        return ret;
+    }
+
     d->xenoprof->domain_type = XENOPROF_DOMAIN_PASSIVE;
     passive.nbuf = d->xenoprof->nbuf;
     passive.bufsize = d->xenoprof->bufsize;
-    passive.buf_maddr = __pa(d->xenoprof->rawbuf);
+    if (!shadow_mode_translate(d)) 
+        passive.buf_gmaddr = __pa(d->xenoprof->rawbuf);
+    else
+        xenoprof_shared_gmfn_with_guest(current->domain, 
__pa(d->xenoprof->rawbuf), passive.buf_gmaddr, d->xenoprof->npages);
 
     if ( copy_to_guest(arg, &passive, 1) ) {
         put_domain(d);
@@ -446,7 +501,7 @@ static int xenoprof_op_init(XEN_GUEST_HA
         return -EFAULT;
 
     if ( xenoprof_init.is_primary )
-        primary_profiler = current->domain;
+        xenoprof_primary_profiler = current->domain;
 
     return 0;
 }
@@ -468,18 +523,28 @@ static int xenoprof_op_get_buffer(XEN_GU
          ((ret = alloc_xenoprof_struct(d, xenoprof_get_buffer.max_samples, 0)) 
< 0) )
         return ret;
 
+    ret = share_xenoprof_page_with_guest(d, virt_to_mfn(d->xenoprof->rawbuf),
+                                         d->xenoprof->npages);
+    if (ret)
+        return ret;
+
     xenoprof_reset_buf(d);
 
     d->xenoprof->domain_type  = XENOPROF_DOMAIN_IGNORED;
     d->xenoprof->domain_ready = 0;
-    if ( primary_profiler == current->domain )
+    if ( xenoprof_primary_profiler == current->domain )
         d->xenoprof->is_primary = 1;
     else
         d->xenoprof->is_primary = 0;
         
     xenoprof_get_buffer.nbuf = d->xenoprof->nbuf;
     xenoprof_get_buffer.bufsize = d->xenoprof->bufsize;
-    xenoprof_get_buffer.buf_maddr = __pa(d->xenoprof->rawbuf);
+    if (!shadow_mode_translate(d))
+        xenoprof_get_buffer.buf_gmaddr = __pa(d->xenoprof->rawbuf);
+    else
+        xenoprof_shared_gmfn_with_guest(d, __pa(d->xenoprof->rawbuf),
+                                        xenoprof_get_buffer.buf_gmaddr,
+                                        d->xenoprof->npages);
 
     if ( copy_to_guest(arg, &xenoprof_get_buffer, 1) )
         return -EFAULT;
@@ -503,7 +568,7 @@ int do_xenoprof_op(int op, XEN_GUEST_HAN
         return -EINVAL;
     }
 
-    if ( !NONPRIV_OP(op) && (current->domain != primary_profiler) )
+    if ( !NONPRIV_OP(op) && (current->domain != xenoprof_primary_profiler) )
     {
         printk("xenoprof: dom %d denied privileged operation %d\n",
                current->domain->domain_id, op);
@@ -589,7 +654,7 @@ int do_xenoprof_op(int op, XEN_GUEST_HAN
     case XENOPROF_enable_virq:
     {
         int i;
-        if ( current->domain == primary_profiler )
+        if ( current->domain == xenoprof_primary_profiler )
         {
             xenoprof_arch_enable_virq();
             xenoprof_reset_stat();
@@ -622,14 +687,20 @@ int do_xenoprof_op(int op, XEN_GUEST_HAN
         break;
 
     case XENOPROF_disable_virq:
+    {
+        struct xenoprof *x = current->domain->xenoprof;
         if ( (xenoprof_state == XENOPROF_PROFILING) && 
              (is_active(current->domain)) ) {
             ret = -EPERM;
             break;
         }
         ret = reset_active(current->domain);
-        break;
-
+        if (ret)
+            break;
+        x = current->domain->xenoprof; /*reset_active() guarantees x != NULL*/
+        unshare_xenoprof_page_with_guest(virt_to_mfn(x->rawbuf), x->npages);
+        break;
+    }
     case XENOPROF_release_counters:
         ret = -EPERM;
         if ( (xenoprof_state == XENOPROF_COUNTERS_RESERVED) ||
@@ -649,7 +720,7 @@ int do_xenoprof_op(int op, XEN_GUEST_HAN
         {
             activated = 0;
             adomains=0;
-            primary_profiler = NULL;
+            xenoprof_primary_profiler = NULL;
             ret = 0;
         }
         break;
diff -r 9bf71c7abb2d -r 2619990fdf37 xen/include/asm-x86/xenoprof.h
--- a/xen/include/asm-x86/xenoprof.h    Tue Nov 14 15:34:22 2006 +0900
+++ b/xen/include/asm-x86/xenoprof.h    Thu Nov 16 15:29:50 2006 +0900
@@ -45,6 +45,17 @@ void nmi_release_counters(void);
 
 int xenoprof_arch_counter(XEN_GUEST_HANDLE(void) arg);
 
+struct vcpu;
+struct cpu_user_regs;
+int xenoprofile_get_mode(struct vcpu *v, struct cpu_user_regs * const regs);
+#define xenoprof_shared_gmfn(d, gmaddr, maddr)                      \
+    do {                                                            \
+        (void)(maddr);                                              \
+        gdprintk(XENLOG_ERR,                                        \
+                 "xenoprof/x86 with autotranslated mode enabled"    \
+                 "isn't supported yet\n");                          \
+    } while (0)
+
 #endif /* __ASM_XENOPROF_H__ */
 
 /*
diff -r 9bf71c7abb2d -r 2619990fdf37 xen/include/public/xenoprof.h
--- a/xen/include/public/xenoprof.h     Tue Nov 14 15:34:22 2006 +0900
+++ b/xen/include/public/xenoprof.h     Thu Nov 16 15:29:50 2006 +0900
@@ -87,7 +87,7 @@ struct xenoprof_get_buffer {
     int32_t  max_samples;
     int32_t  nbuf;
     int32_t  bufsize;
-    uint64_t buf_maddr;
+    uint64_t buf_gmaddr;
 };
 typedef struct xenoprof_get_buffer xenoprof_get_buffer_t;
 DEFINE_XEN_GUEST_HANDLE(xenoprof_get_buffer_t);
@@ -110,7 +110,7 @@ typedef struct xenoprof_passive {
     int32_t  max_samples;
     int32_t  nbuf;
     int32_t  bufsize;
-    uint64_t buf_maddr;
+    uint64_t buf_gmaddr;
 } xenoprof_passive_t;
 DEFINE_XEN_GUEST_HANDLE(xenoprof_passive_t);
 
diff -r 9bf71c7abb2d -r 2619990fdf37 xen/include/xen/xenoprof.h
--- a/xen/include/xen/xenoprof.h        Tue Nov 14 15:34:22 2006 +0900
+++ b/xen/include/xen/xenoprof.h        Thu Nov 16 15:29:50 2006 +0900
@@ -41,4 +41,8 @@ struct domain;
 struct domain;
 void free_xenoprof_pages(struct domain *d);
 
+int do_xenoprof_op(int op, XEN_GUEST_HANDLE(void) arg);
+
+extern struct domain *xenoprof_primary_profiler;
+
 #endif  /* __XEN__XENOPROF_H__ */


-- 
yamahata

Attachment: 12455_2619990fdf37_make_xenoprof_of_xen_side_arch_generic.patch
Description: Text document

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