[PATCH 25/89] KVM: arm64: Add flags to struct hyp_page

[Will Deacon]

From: Quentin Perret <qper...@google.com>

Add a 'flags' field to struct hyp_page, and reduce the size of the order
field to u8 to avoid growing the struct size.

Signed-off-by: Quentin Perret <qper...@google.com>
---
 arch/arm64/kvm/hyp/include/nvhe/gfp.h    |  6 +++---
 arch/arm64/kvm/hyp/include/nvhe/memory.h |  3 ++-
 arch/arm64/kvm/hyp/nvhe/page_alloc.c     | 14 +++++++-------
 3 files changed, 12 insertions(+), 11 deletions(-)

diff --git a/arch/arm64/kvm/hyp/include/nvhe/gfp.h 
b/arch/arm64/kvm/hyp/include/nvhe/gfp.h
index 0a048dc06a7d..9330b13075f8 100644
--- a/arch/arm64/kvm/hyp/include/nvhe/gfp.h
+++ b/arch/arm64/kvm/hyp/include/nvhe/gfp.h
@@ -7,7 +7,7 @@
 #include <nvhe/memory.h>
 #include <nvhe/spinlock.h>
 
-#define HYP_NO_ORDER   USHRT_MAX
+#define HYP_NO_ORDER   0xff
 
 struct hyp_pool {
        /*
@@ -19,11 +19,11 @@ struct hyp_pool {
        struct list_head free_area[MAX_ORDER];
        phys_addr_t range_start;
        phys_addr_t range_end;
-       unsigned short max_order;
+       u8 max_order;
 };
 
 /* Allocation */
-void *hyp_alloc_pages(struct hyp_pool *pool, unsigned short order);
+void *hyp_alloc_pages(struct hyp_pool *pool, u8 order);
 void hyp_split_page(struct hyp_page *page);
 void hyp_get_page(struct hyp_pool *pool, void *addr);
 void hyp_put_page(struct hyp_pool *pool, void *addr);
diff --git a/arch/arm64/kvm/hyp/include/nvhe/memory.h 
b/arch/arm64/kvm/hyp/include/nvhe/memory.h
index e8a78b72aabf..29f2ebe306bc 100644
--- a/arch/arm64/kvm/hyp/include/nvhe/memory.h
+++ b/arch/arm64/kvm/hyp/include/nvhe/memory.h
@@ -9,7 +9,8 @@
 
 struct hyp_page {
        unsigned short refcount;
-       unsigned short order;
+       u8 order;
+       u8 flags;
 };
 
 extern u64 __hyp_vmemmap;
diff --git a/arch/arm64/kvm/hyp/nvhe/page_alloc.c 
b/arch/arm64/kvm/hyp/nvhe/page_alloc.c
index 7804da89e55d..01976a58d850 100644
--- a/arch/arm64/kvm/hyp/nvhe/page_alloc.c
+++ b/arch/arm64/kvm/hyp/nvhe/page_alloc.c
@@ -32,7 +32,7 @@ u64 __hyp_vmemmap;
  */
 static struct hyp_page *__find_buddy_nocheck(struct hyp_pool *pool,
                                             struct hyp_page *p,
-                                            unsigned short order)
+                                            u8 order)
 {
        phys_addr_t addr = hyp_page_to_phys(p);
 
@@ -51,7 +51,7 @@ static struct hyp_page *__find_buddy_nocheck(struct hyp_pool 
*pool,
 /* Find a buddy page currently available for allocation */
 static struct hyp_page *__find_buddy_avail(struct hyp_pool *pool,
                                           struct hyp_page *p,
-                                          unsigned short order)
+                                          u8 order)
 {
        struct hyp_page *buddy = __find_buddy_nocheck(pool, p, order);
 
@@ -94,8 +94,8 @@ static void __hyp_attach_page(struct hyp_pool *pool,
                              struct hyp_page *p)
 {
        phys_addr_t phys = hyp_page_to_phys(p);
-       unsigned short order = p->order;
        struct hyp_page *buddy;
+       u8 order = p->order;
 
        memset(hyp_page_to_virt(p), 0, PAGE_SIZE << p->order);
 
@@ -128,7 +128,7 @@ static void __hyp_attach_page(struct hyp_pool *pool,
 
 static struct hyp_page *__hyp_extract_page(struct hyp_pool *pool,
                                           struct hyp_page *p,
-                                          unsigned short order)
+                                          u8 order)
 {
        struct hyp_page *buddy;
 
@@ -182,7 +182,7 @@ void hyp_get_page(struct hyp_pool *pool, void *addr)
 
 void hyp_split_page(struct hyp_page *p)
 {
-       unsigned short order = p->order;
+       u8 order = p->order;
        unsigned int i;
 
        p->order = 0;
@@ -194,10 +194,10 @@ void hyp_split_page(struct hyp_page *p)
        }
 }
 
-void *hyp_alloc_pages(struct hyp_pool *pool, unsigned short order)
+void *hyp_alloc_pages(struct hyp_pool *pool, u8 order)
 {
-       unsigned short i = order;
        struct hyp_page *p;
+       u8 i = order;
 
        hyp_spin_lock(&pool->lock);
 
-- 
2.36.1.124.g0e6072fb45-goog

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