From mboxrd@z Thu Jan 1 00:00:00 1970 From: Julien Grall Subject: [PATCH 3/8] xen/arm: Implement p2m_type_t as an enum Date: Thu, 5 Dec 2013 15:42:06 +0000 Message-ID: <1386258131-755-4-git-send-email-julien.grall@linaro.org> References: <1386258131-755-1-git-send-email-julien.grall@linaro.org> Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Return-path: Received: from mail6.bemta5.messagelabs.com ([195.245.231.135]) by lists.xen.org with esmtp (Exim 4.72) (envelope-from ) id 1Vob4R-0001r0-7F for xen-devel@lists.xenproject.org; Thu, 05 Dec 2013 15:42:31 +0000 Received: by mail-we0-f172.google.com with SMTP id w62so11186198wes.31 for ; Thu, 05 Dec 2013 07:42:29 -0800 (PST) In-Reply-To: <1386258131-755-1-git-send-email-julien.grall@linaro.org> List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Sender: xen-devel-bounces@lists.xen.org Errors-To: xen-devel-bounces@lists.xen.org To: xen-devel@lists.xenproject.org Cc: Julien Grall , stefano.stabellini@citrix.com, ian.campbell@citrix.com, time@xen.org, patches@linaro.org List-Id: xen-devel@lists.xenproject.org Until now, Xen doesn't know the type of the page (ram, foreign page, mmio,...). Introduce p2m_type_t with basic types: - p2m_invalid: Nothing is mapped here - p2m_ram_rw: Normal read/write guest RAM - p2m_ram_ro: Read-only guest RAM - p2m_mmio_direct: Read/write mapping of device memory - p2m_map_foreign: RAM page from foreign guest Signed-off-by: Julien Grall --- xen/include/asm-arm/p2m.h | 13 ++++++++++--- 1 file changed, 10 insertions(+), 3 deletions(-) diff --git a/xen/include/asm-arm/p2m.h b/xen/include/asm-arm/p2m.h index f079f00..b24f94a 100644 --- a/xen/include/asm-arm/p2m.h +++ b/xen/include/asm-arm/p2m.h @@ -20,6 +20,16 @@ struct p2m_domain { uint8_t vmid; }; +typedef enum { + p2m_invalid = 0, /* Nothing mapped here */ + p2m_ram_rw = 1, /* Normal read/write guest RAM */ + p2m_ram_ro = 2, /* Read-only; writes are silently dropped */ + p2m_mmio_direct = 3, /* Read/write mapping of genuine MMIO area */ + p2m_map_foreign = 4, /* Ram pages from foreign domain */ +} p2m_type_t; + +#define p2m_is_foreign(_t) ((_t) == p2m_map_foreign) + /* Initialise vmid allocator */ void p2m_vmid_allocator_init(void); @@ -72,7 +82,6 @@ p2m_pod_decrease_reservation(struct domain *d, unsigned int order); /* Look up a GFN and take a reference count on the backing page. */ -typedef int p2m_type_t; typedef unsigned int p2m_query_t; #define P2M_ALLOC (1u<<0) /* Populate PoD and paged-out entries */ #define P2M_UNSHARE (1u<<1) /* Break CoW sharing */ @@ -110,8 +119,6 @@ static inline int get_page_and_type(struct page_info *page, return rc; } -#define p2m_is_foreign(_t) (0) - #endif /* _XEN_P2M_H */ /* -- 1.7.10.4