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From: Jan Beulich <jbeulich@suse.com>
To: "xen-devel@lists.xenproject.org" <xen-devel@lists.xenproject.org>
Cc: "Andrew Cooper" <andrew.cooper3@citrix.com>,
	"Wei Liu" <wl@xen.org>, "Roger Pau Monné" <roger.pau@citrix.com>,
	"George Dunlap" <george.dunlap@citrix.com>,
	"Kevin Tian" <kevin.tian@intel.com>,
	"Jun Nakajima" <jun.nakajima@intel.com>,
	"Tim Deegan" <tim@xen.org>
Subject: [PATCH 1/2] x86/mm: don't open-code p2m_is_pod()
Date: Wed, 1 Dec 2021 12:01:24 +0100	[thread overview]
Message-ID: <a1110809-b4fb-c53e-5f46-dc7628165634@suse.com> (raw)
In-Reply-To: <ac46f25b-e669-f309-b36e-c4760e10479e@suse.com>

Replace all comparisons against p2m_populate_on_demand (outside of
switch() statements) with the designated predicate.

Signed-off-by: Jan Beulich <jbeulich@suse.com>

--- a/xen/arch/x86/mm/p2m-ept.c
+++ b/xen/arch/x86/mm/p2m-ept.c
@@ -344,7 +344,7 @@ static int ept_next_level(struct p2m_dom
     {
         int rc;
 
-        if ( e.sa_p2mt == p2m_populate_on_demand )
+        if ( p2m_is_pod(e.sa_p2mt) )
             return GUEST_TABLE_POD_PAGE;
 
         if ( read_only )
@@ -1071,7 +1071,7 @@ static mfn_t ept_get_entry(struct p2m_do
     index = gfn_remainder >> (i * EPT_TABLE_ORDER);
     ept_entry = table + index;
 
-    if ( ept_entry->sa_p2mt == p2m_populate_on_demand )
+    if ( p2m_is_pod(ept_entry->sa_p2mt) )
     {
         if ( !(q & P2M_ALLOC) )
         {
@@ -1478,7 +1478,7 @@ static void ept_dump_p2m_table(unsigned
             ept_entry = table + (gfn_remainder >> order);
             if ( ret != GUEST_TABLE_MAP_FAILED && is_epte_valid(ept_entry) )
             {
-                if ( ept_entry->sa_p2mt == p2m_populate_on_demand )
+                if ( p2m_is_pod(ept_entry->sa_p2mt) )
                     printk("gfn: %13lx order: %2d PoD\n", gfn, order);
                 else
                     printk("gfn: %13lx order: %2d mfn: %13lx %c%c%c %c%c%c\n",
--- a/xen/arch/x86/mm/p2m-pod.c
+++ b/xen/arch/x86/mm/p2m-pod.c
@@ -543,7 +543,7 @@ decrease_reservation(struct domain *d, g
 
         p2m->get_entry(p2m, gfn_add(gfn, i), &t, &a, 0, &cur_order, NULL);
         n = 1UL << min(order, cur_order);
-        if ( t == p2m_populate_on_demand )
+        if ( p2m_is_pod(t) )
             pod += n;
         else if ( p2m_is_ram(t) )
             ram += n;
@@ -618,7 +618,7 @@ decrease_reservation(struct domain *d, g
         if ( order < cur_order )
             cur_order = order;
         n = 1UL << cur_order;
-        if ( t == p2m_populate_on_demand )
+        if ( p2m_is_pod(t) )
         {
             /* This shouldn't be able to fail */
             if ( p2m_set_entry(p2m, gfn_add(gfn, i), INVALID_MFN, cur_order,
@@ -1332,7 +1332,7 @@ mark_populate_on_demand(struct domain *d
 
         p2m->get_entry(p2m, gfn_add(gfn, i), &ot, &a, 0, &cur_order, NULL);
         n = 1UL << min(order, cur_order);
-        if ( ot == p2m_populate_on_demand )
+        if ( p2m_is_pod(ot) )
         {
             /* Count how many PoD entries we'll be replacing if successful */
             pod_count += n;
--- a/xen/arch/x86/mm/p2m-pt.c
+++ b/xen/arch/x86/mm/p2m-pt.c
@@ -841,7 +841,7 @@ pod_retry_l3:
         flags = l3e_get_flags(*l3e);
         if ( !(flags & _PAGE_PRESENT) )
         {
-            if ( p2m_flags_to_type(flags) == p2m_populate_on_demand )
+            if ( p2m_is_pod(p2m_flags_to_type(flags)) )
             {
                 if ( q & P2M_ALLOC )
                 {
@@ -884,7 +884,7 @@ pod_retry_l2:
     if ( !(flags & _PAGE_PRESENT) )
     {
         /* PoD: Try to populate a 2-meg chunk */
-        if ( p2m_flags_to_type(flags) == p2m_populate_on_demand )
+        if ( p2m_is_pod(p2m_flags_to_type(flags)) )
         {
             if ( q & P2M_ALLOC ) {
                 if ( p2m_pod_demand_populate(p2m, gfn_, PAGE_ORDER_2M) )
@@ -923,7 +923,7 @@ pod_retry_l1:
     if ( !(flags & _PAGE_PRESENT) && !p2m_is_paging(l1t) )
     {
         /* PoD: Try to populate */
-        if ( l1t == p2m_populate_on_demand )
+        if ( p2m_is_pod(l1t) )
         {
             if ( q & P2M_ALLOC ) {
                 if ( p2m_pod_demand_populate(p2m, gfn_, PAGE_ORDER_4K) )
@@ -1094,8 +1094,7 @@ static long p2m_pt_audit_p2m(struct p2m_
                     if ( !(l2e_get_flags(l2e[i2]) & _PAGE_PRESENT) )
                     {
                         if ( (l2e_get_flags(l2e[i2]) & _PAGE_PSE)
-                             && ( p2m_flags_to_type(l2e_get_flags(l2e[i2]))
-                                  == p2m_populate_on_demand ) )
+                             && p2m_is_pod(p2m_flags_to_type(l2e_get_flags(l2e[i2]))) )
                             entry_count+=SUPERPAGE_PAGES;
                         gfn += 1 << (L2_PAGETABLE_SHIFT - PAGE_SHIFT);
                         continue;
@@ -1132,7 +1131,7 @@ static long p2m_pt_audit_p2m(struct p2m_
                         type = p2m_flags_to_type(l1e_get_flags(l1e[i1]));
                         if ( !(l1e_get_flags(l1e[i1]) & _PAGE_PRESENT) )
                         {
-                            if ( type == p2m_populate_on_demand )
+                            if ( p2m_is_pod(type) )
                                 entry_count++;
                             continue;
                         }
--- a/xen/arch/x86/mm/p2m.c
+++ b/xen/arch/x86/mm/p2m.c
@@ -992,7 +992,7 @@ guest_physmap_add_entry(struct domain *d
             ASSERT(mfn_valid(omfn));
             set_gpfn_from_mfn(mfn_x(omfn), INVALID_M2P_ENTRY);
         }
-        else if ( ot == p2m_populate_on_demand )
+        else if ( p2m_is_pod(ot) )
         {
             /* Count how man PoD entries we'll be replacing if successful */
             pod_count++;
--- a/xen/arch/x86/mm/shadow/multi.c
+++ b/xen/arch/x86/mm/shadow/multi.c
@@ -1476,7 +1476,7 @@ static int validate_gl4e(struct vcpu *v,
         mfn_t gl3mfn = get_gfn_query_unlocked(d, gfn_x(gl3gfn), &p2mt);
         if ( p2m_is_ram(p2mt) )
             sl3mfn = get_shadow_status(d, gl3mfn, SH_type_l3_shadow);
-        else if ( p2mt != p2m_populate_on_demand )
+        else if ( !p2m_is_pod(p2mt) )
             result |= SHADOW_SET_ERROR;
 
 #if (SHADOW_OPTIMIZATIONS & SHOPT_OUT_OF_SYNC )
@@ -1535,7 +1535,7 @@ static int validate_gl3e(struct vcpu *v,
         mfn_t gl2mfn = get_gfn_query_unlocked(d, gfn_x(gl2gfn), &p2mt);
         if ( p2m_is_ram(p2mt) )
             sl2mfn = get_shadow_status(d, gl2mfn, SH_type_l2_shadow);
-        else if ( p2mt != p2m_populate_on_demand )
+        else if ( !p2m_is_pod(p2mt) )
             result |= SHADOW_SET_ERROR;
 
 #if (SHADOW_OPTIMIZATIONS & SHOPT_OUT_OF_SYNC )
@@ -1586,7 +1586,7 @@ static int validate_gl2e(struct vcpu *v,
             mfn_t gl1mfn = get_gfn_query_unlocked(d, gfn_x(gl1gfn), &p2mt);
             if ( p2m_is_ram(p2mt) )
                 sl1mfn = get_shadow_status(d, gl1mfn, SH_type_l1_shadow);
-            else if ( p2mt != p2m_populate_on_demand )
+            else if ( !p2m_is_pod(p2mt) )
                 result |= SHADOW_SET_ERROR;
         }
     }



  reply	other threads:[~2021-12-01 11:01 UTC|newest]

Thread overview: 24+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-12-01 11:00 [PATCH 0/2] x86/mm: XSA-389 follow-up Jan Beulich
2021-12-01 11:01 ` Jan Beulich [this message]
2021-12-01 11:22   ` [PATCH 1/2] x86/mm: don't open-code p2m_is_pod() Andrew Cooper
2021-12-02 19:10   ` Tim Deegan
2021-12-01 11:02 ` [PATCH 2/2] x86/PoD: move increment of entry count Jan Beulich
2021-12-01 11:27   ` Andrew Cooper
2021-12-01 11:50     ` Jan Beulich
2021-12-01 11:52 ` Jan Beulich
2021-12-01 15:40   ` Andrew Cooper
2022-01-04 10:57 ` [PATCH v2] " Jan Beulich
2022-01-27 15:04   ` Ping: " Jan Beulich
2022-02-24 13:04     ` Ping²: " Jan Beulich
2024-03-11 16:04   ` George Dunlap
2024-03-12 13:17     ` Jan Beulich
2024-03-12 15:22 ` [PATCH v3] x86/PoD: tie together P2M update and " Jan Beulich
2024-03-13 10:58   ` George Dunlap
2024-03-13 12:19     ` Jan Beulich
2024-03-13 12:25       ` George Dunlap
2024-03-13 12:25         ` George Dunlap
2024-03-13 14:00 ` [PATCH v4] " Jan Beulich
2024-03-13 16:31   ` George Dunlap
2024-03-14  6:59     ` Jan Beulich
2024-03-19 13:22 ` [PATCH v5] " Jan Beulich
2024-03-20  9:50   ` George Dunlap

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