From patchwork Thu Jul 26 15:33:45 2012 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Stefano Stabellini X-Patchwork-Id: 1243391 Return-Path: X-Original-To: patchwork-linux-arm@patchwork.kernel.org Delivered-To: patchwork-process-083081@patchwork1.kernel.org Received: from merlin.infradead.org (merlin.infradead.org [205.233.59.134]) by patchwork1.kernel.org (Postfix) with ESMTP id 293BD3FC5A for ; Thu, 26 Jul 2012 15:48:17 +0000 (UTC) Received: from localhost ([::1] helo=merlin.infradead.org) by merlin.infradead.org with esmtp (Exim 4.76 #1 (Red Hat Linux)) id 1SuQDW-0002Vr-Su; Thu, 26 Jul 2012 15:43:10 +0000 Received: from [66.165.176.89] (helo=SMTP.CITRIX.COM) by merlin.infradead.org with esmtps (Exim 4.76 #1 (Red Hat Linux)) id 1SuQ6n-0001tl-9q for linux-arm-kernel@lists.infradead.org; Thu, 26 Jul 2012 15:36:13 +0000 X-IronPort-AV: E=Sophos;i="4.77,659,1336363200"; d="scan'208";a="32688369" Received: from ftlpmailmx02.citrite.net ([10.13.107.66]) by FTLPIPO01.CITRIX.COM with ESMTP/TLS/RC4-MD5; 26 Jul 2012 11:34:50 -0400 Received: from ukmail1.uk.xensource.com (10.80.16.128) by smtprelay.citrix.com (10.13.107.66) with Microsoft SMTP Server id 8.3.213.0; Thu, 26 Jul 2012 11:34:50 -0400 Received: from kaball.uk.xensource.com ([10.80.2.59]) by ukmail1.uk.xensource.com with esmtp (Exim 4.69) (envelope-from ) id 1SuQ5M-0006qa-Mo; Thu, 26 Jul 2012 16:34:44 +0100 From: Stefano Stabellini To: Subject: [PATCH 03/24] xen/arm: page.h definitions Date: Thu, 26 Jul 2012 16:33:45 +0100 Message-ID: <1343316846-25860-3-git-send-email-stefano.stabellini@eu.citrix.com> X-Mailer: git-send-email 1.7.9.5 In-Reply-To: References: MIME-Version: 1.0 X-Spam-Note: CRM114 invocation failed X-Spam-Note: SpamAssassin invocation failed Cc: xen-devel@lists.xensource.com, linaro-dev@lists.linaro.org, Ian.Campbell@citrix.com, arnd@arndb.de, konrad.wilk@oracle.com, catalin.marinas@arm.com, Stefano Stabellini , tim@xen.org, linux-arm-kernel@lists.infradead.org X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.14 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: linux-arm-kernel-bounces@lists.infradead.org Errors-To: linux-arm-kernel-bounces+patchwork-linux-arm=patchwork.kernel.org@lists.infradead.org ARM Xen guests always use paging in hardware, like PV on HVM guests in the X86 world. Signed-off-by: Stefano Stabellini --- arch/arm/include/asm/xen/page.h | 77 +++++++++++++++++++++++++++++++++++++++ 1 files changed, 77 insertions(+), 0 deletions(-) create mode 100644 arch/arm/include/asm/xen/page.h diff --git a/arch/arm/include/asm/xen/page.h b/arch/arm/include/asm/xen/page.h new file mode 100644 index 0000000..6cfe9a1 --- /dev/null +++ b/arch/arm/include/asm/xen/page.h @@ -0,0 +1,77 @@ +#ifndef _ASM_ARM_XEN_PAGE_H +#define _ASM_ARM_XEN_PAGE_H + +#include +#include +#include +#include +#include + +#define pfn_to_mfn(pfn) (pfn) +#define phys_to_machine_mapping_valid (1) +#define mfn_to_pfn(mfn) (mfn) +#define mfn_to_virt(m) (__va(mfn_to_pfn(m) << PAGE_SHIFT)) + +#define pte_mfn pte_pfn +#define mfn_pte pfn_pte + +/* Xen machine address */ +typedef struct xmaddr { + phys_addr_t maddr; +} xmaddr_t; + +/* Xen pseudo-physical address */ +typedef struct xpaddr { + phys_addr_t paddr; +} xpaddr_t; + +#define XMADDR(x) ((xmaddr_t) { .maddr = (x) }) +#define XPADDR(x) ((xpaddr_t) { .paddr = (x) }) + +static inline xmaddr_t phys_to_machine(xpaddr_t phys) +{ + unsigned offset = phys.paddr & ~PAGE_MASK; + return XMADDR(PFN_PHYS(pfn_to_mfn(PFN_DOWN(phys.paddr))) | offset); +} + +static inline xpaddr_t machine_to_phys(xmaddr_t machine) +{ + unsigned offset = machine.maddr & ~PAGE_MASK; + return XPADDR(PFN_PHYS(mfn_to_pfn(PFN_DOWN(machine.maddr))) | offset); +} +/* VIRT <-> MACHINE conversion */ +#define virt_to_machine(v) (phys_to_machine(XPADDR(__pa(v)))) +#define virt_to_pfn(v) (PFN_DOWN(__pa(v))) +#define virt_to_mfn(v) (pfn_to_mfn(virt_to_pfn(v))) +#define mfn_to_virt(m) (__va(mfn_to_pfn(m) << PAGE_SHIFT)) + +static inline xmaddr_t arbitrary_virt_to_machine(void *vaddr) +{ + /* XXX: assuming it is mapped in the kernel 1:1 */ + return virt_to_machine(vaddr); +} + +/* XXX: this shouldn't be here */ +static inline pte_t *lookup_address(unsigned long address, unsigned int *level) +{ + BUG(); + return NULL; +} + +static inline int m2p_add_override(unsigned long mfn, struct page *page, + struct gnttab_map_grant_ref *kmap_op) +{ + return 0; +} + +static inline int m2p_remove_override(struct page *page, bool clear_pte) +{ + return 0; +} + +static inline bool set_phys_to_machine(unsigned long pfn, unsigned long mfn) +{ + BUG(); + return false; +} +#endif /* _ASM_ARM_XEN_PAGE_H */