Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S932116Ab2HFOiF (ORCPT ); Mon, 6 Aug 2012 10:38:05 -0400 Received: from smtp02.citrix.com ([66.165.176.63]:16550 "EHLO SMTP02.CITRIX.COM" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1756440Ab2HFOf0 (ORCPT ); Mon, 6 Aug 2012 10:35:26 -0400 X-IronPort-AV: E=Sophos;i="4.77,720,1336363200"; d="scan'208";a="204276919" From: Stefano Stabellini To: CC: , , , , , , , , , Stefano Stabellini Subject: [PATCH v2 03/23] xen/arm: page.h definitions Date: Mon, 6 Aug 2012 15:27:06 +0100 Message-ID: <1344263246-28036-3-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 Content-Type: text/plain Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 2824 Lines: 102 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 | 79 +++++++++++++++++++++++++++++++++++++++ 1 files changed, 79 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..fe78331 --- /dev/null +++ b/arch/arm/include/asm/xen/page.h @@ -0,0 +1,79 @@ +#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 */ -- 1.7.2.5 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/