From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from psmtp.com (na3sys010amx163.postini.com [74.125.245.163]) by kanga.kvack.org (Postfix) with SMTP id BB1AC6B0031 for ; Tue, 9 Jul 2013 09:57:02 -0400 (EDT) Received: from /spool/local by e06smtp16.uk.ibm.com with IBM ESMTP SMTP Gateway: Authorized Use Only! Violators will be prosecuted for from ; Tue, 9 Jul 2013 14:51:26 +0100 Received: from b06cxnps3074.portsmouth.uk.ibm.com (d06relay09.portsmouth.uk.ibm.com [9.149.109.194]) by d06dlp02.portsmouth.uk.ibm.com (Postfix) with ESMTP id 6B17E2190059 for ; Tue, 9 Jul 2013 15:00:50 +0100 (BST) Received: from d06av08.portsmouth.uk.ibm.com (d06av08.portsmouth.uk.ibm.com [9.149.37.249]) by b06cxnps3074.portsmouth.uk.ibm.com (8.13.8/8.13.8/NCO v10.0) with ESMTP id r69Dul6n54853648 for ; Tue, 9 Jul 2013 13:56:47 GMT Received: from d06av08.portsmouth.uk.ibm.com (localhost [127.0.0.1]) by d06av08.portsmouth.uk.ibm.com (8.14.4/8.14.4/NCO v10.0 AVout) with ESMTP id r69DuvmP008714 for ; Tue, 9 Jul 2013 07:56:58 -0600 From: Dominik Dingel Subject: [PATCH 2/4] PF: Make KVM_HVA_ERR_BAD usable on s390 Date: Tue, 9 Jul 2013 15:56:45 +0200 Message-Id: <1373378207-10451-3-git-send-email-dingel@linux.vnet.ibm.com> In-Reply-To: <1373378207-10451-1-git-send-email-dingel@linux.vnet.ibm.com> References: <1373378207-10451-1-git-send-email-dingel@linux.vnet.ibm.com> Sender: owner-linux-mm@kvack.org List-ID: To: Gleb Natapov , Paolo Bonzini Cc: Christian Borntraeger , Heiko Carstens , Martin Schwidefsky , Cornelia Huck , Xiantao Zhang , Alexander Graf , Christoffer Dall , Marc Zyngier , Ralf Baechle , kvm@vger.kernel.org, linux-s390@vger.kernel.org, linux-mm@kvack.org, linux-kernel@vger.kernel.org, Dominik Dingel Current common code uses PAGE_OFFSET to indicate a bad host virtual address. As this check won't work on architectures that don't map kernel and user memory into the same address space (e.g. s390), an additional implementation is made available in the case that PAGE_OFFSET == 0. Signed-off-by: Dominik Dingel --- include/linux/kvm_host.h | 14 ++++++++++++++ 1 file changed, 14 insertions(+) diff --git a/include/linux/kvm_host.h b/include/linux/kvm_host.h index a63d83e..f3c04e7 100644 --- a/include/linux/kvm_host.h +++ b/include/linux/kvm_host.h @@ -85,6 +85,18 @@ static inline bool is_noslot_pfn(pfn_t pfn) return pfn == KVM_PFN_NOSLOT; } +#if (PAGE_OFFSET == 0) + +#define KVM_HVA_ERR_BAD (-1UL) +#define KVM_HVA_ERR_RO_BAD (-1UL) + +static inline bool kvm_is_error_hva(unsigned long addr) +{ + return addr == KVM_HVA_ERR_BAD; +} + +#else + #define KVM_HVA_ERR_BAD (PAGE_OFFSET) #define KVM_HVA_ERR_RO_BAD (PAGE_OFFSET + PAGE_SIZE) @@ -93,6 +105,8 @@ static inline bool kvm_is_error_hva(unsigned long addr) return addr >= PAGE_OFFSET; } +#endif + #define KVM_ERR_PTR_BAD_PAGE (ERR_PTR(-ENOENT)) static inline bool is_error_page(struct page *page) -- 1.8.2.2 -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@kvack.org. For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: email@kvack.org