On 06/13/2018 03:03 PM, Oleksandr Andrushchenko wrote:
On 06/13/2018 03:02 PM, Boris Ostrovsky wrote:
On 06/13/2018 02:26 AM, Oleksandr Andrushchenko wrote:
On 06/13/2018 03:47 AM, Boris Ostrovsky wrote:
On 06/12/2018 09:41 AM, Oleksandr Andrushchenko wrote:
From: Oleksandr Andrushchenko <oleksandr_andrushchenko@xxxxxxxx>
diff --git a/include/xen/mem-reservation.h
b/include/xen/mem-reservation.h
new file mode 100644
index 000000000000..e0939387278d
--- /dev/null
+++ b/include/xen/mem-reservation.h
@@ -0,0 +1,64 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+
+/*
+ * Xen memory reservation utilities.
+ *
+ * Copyright (c) 2003, B Dragovic
+ * Copyright (c) 2003-2004, M Williamson, K Fraser
+ * Copyright (c) 2005 Dan M. Smith, IBM Corporation
+ * Copyright (c) 2010 Daniel Kiper
+ * Copyright (c) 2018 Oleksandr Andrushchenko, EPAM Systems Inc.
+ */
+
+#ifndef _XENMEM_RESERVATION_H
+#define _XENMEM_RESERVATION_H
+
+#include <linux/kernel.h>
+#include <linux/slab.h>
+
+#include <asm/xen/hypercall.h>
+#include <asm/tlb.h>
+
+#include <xen/interface/memory.h>
+#include <xen/page.h>
I should have noticed this in the previous post but I suspect most
of these includes belong in the C file. For example, there is no
reason for hypercall.h here.
Yes, it seems that the header can only have
#include <xen/page.h>
Will move the rest into the .c file
You may need something for clear_highpage() and maybe for Xen feature
flags. But you'll find out for sure when you try to build. ;-)
#include <asm/tlb.h>
Or even
#include <linux/highmem.h>
according to [1]
;)
-boris
-boris
+
+static inline void xenmem_reservation_scrub_page(struct page *page)
+{
+#ifdef CONFIG_XEN_SCRUB_PAGES
+ clear_highpage(page);
+#endif
+}
+
+#ifdef CONFIG_XEN_HAVE_PVMMU
+void __xenmem_reservation_va_mapping_update(unsigned long count,
+ struct page **pages,
+ xen_pfn_t *frames);
+
+void __xenmem_reservation_va_mapping_reset(unsigned long count,
+ struct page **pages);
+#endif
+
+static inline void xenmem_reservation_va_mapping_update(unsigned
long count,
+ struct page **pages,
+ xen_pfn_t *frames)
+{
+#ifdef CONFIG_XEN_HAVE_PVMMU
+ if (!xen_feature(XENFEAT_auto_translated_physmap))
+ __xenmem_reservation_va_mapping_update(count, pages,
frames);
+#endif
+}
+
+static inline void xenmem_reservation_va_mapping_reset(unsigned
long count,
+ struct page **pages)
+{
+#ifdef CONFIG_XEN_HAVE_PVMMU
+ if (!xen_feature(XENFEAT_auto_translated_physmap))
+ __xenmem_reservation_va_mapping_reset(count, pages);
+#endif
+}
+
+int xenmem_reservation_increase(int count, xen_pfn_t *frames);
+
+int xenmem_reservation_decrease(int count, xen_pfn_t *frames);
+
+#endif
[1] https://elixir.bootlin.com/linux/v4.17.1/ident/clear_highpage
