Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753575AbbG1PGc (ORCPT ); Tue, 28 Jul 2015 11:06:32 -0400 Received: from smtp.citrix.com ([66.165.176.89]:15029 "EHLO SMTP.CITRIX.COM" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752191AbbG1PEw (ORCPT ); Tue, 28 Jul 2015 11:04:52 -0400 X-IronPort-AV: E=Sophos;i="5.15,563,1432598400"; d="scan'208";a="285194552" From: Julien Grall To: CC: , , , Julien Grall , Russell King , Subject: [PATCH 1/8] arm/xen: Remove helpers which are PV specific Date: Tue, 28 Jul 2015 16:02:42 +0100 Message-ID: <1438095769-2560-2-git-send-email-julien.grall@citrix.com> X-Mailer: git-send-email 2.1.4 In-Reply-To: <1438095769-2560-1-git-send-email-julien.grall@citrix.com> References: <1438095769-2560-1-git-send-email-julien.grall@citrix.com> MIME-Version: 1.0 Content-Type: text/plain X-DLP: MIA1 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 2220 Lines: 61 ARM guests are assimilated to HVM guest on ARM. The current implementation is assuming a 1:1 mapping which is only true for DOM0 and may not be at all in the future. Furthermore, all the helpers but arbitrary_virt_to_machine are used in x86 specific code (or only compiled for). The helper arbitrary_virt_to_machine is only used in PV specific code. Therefore we should never call the function. Add a BUG() in this helper and drop all the others. Signed-off-by: Julien Grall Cc: Stefano Stabellini Cc: Russell King Cc: linux-arm-kernel@lists.infradead.org --- arch/arm/include/asm/xen/page.h | 16 ++-------------- 1 file changed, 2 insertions(+), 14 deletions(-) diff --git a/arch/arm/include/asm/xen/page.h b/arch/arm/include/asm/xen/page.h index 1bee8ca..c2e9dcd 100644 --- a/arch/arm/include/asm/xen/page.h +++ b/arch/arm/include/asm/xen/page.h @@ -54,26 +54,14 @@ static inline unsigned long mfn_to_pfn(unsigned long mfn) #define mfn_to_local_pfn(mfn) mfn_to_pfn(mfn) -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_mfn(v) (pfn_to_mfn(virt_to_pfn(v))) #define mfn_to_virt(m) (__va(mfn_to_pfn(m) << PAGE_SHIFT)) +/* Only used in PV code. However ARM guest is always assimilated as HVM. */ static inline xmaddr_t arbitrary_virt_to_machine(void *vaddr) { - /* TODO: assuming it is mapped in the kernel 1:1 */ - return virt_to_machine(vaddr); + BUG(); } /* TODO: this shouldn't be here but it is because the frontend drivers -- 2.1.4 -- 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/