From mboxrd@z Thu Jan 1 00:00:00 1970 From: Stefano Stabellini Subject: [PATCH v2 1/2] xen: introduce arch_iommu_grant_(un)map_page Date: Wed, 23 Jul 2014 18:19:41 +0100 Message-ID: <1406135982-15487-1-git-send-email-stefano.stabellini@eu.citrix.com> References: Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Return-path: In-Reply-To: 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.xensource.com Cc: julien.grall@citrix.com, Ian.Campbell@citrix.com, Stefano Stabellini List-Id: xen-devel@lists.xenproject.org Introduce two arch specific functions to create a new p2m mapping of granted pages at pfn == mfn. The x86 implementation just returns ENOSYS. Signed-off-by: Stefano Stabellini --- xen/arch/arm/p2m.c | 19 +++++++++++++++++++ xen/include/asm-arm/p2m.h | 4 ++++ xen/include/asm-x86/p2m.h | 13 +++++++++++++ 3 files changed, 36 insertions(+) diff --git a/xen/arch/arm/p2m.c b/xen/arch/arm/p2m.c index 9960e17..c38af59 100644 --- a/xen/arch/arm/p2m.c +++ b/xen/arch/arm/p2m.c @@ -555,6 +555,25 @@ void guest_physmap_remove_page(struct domain *d, pfn_to_paddr(mfn), MATTR_MEM, p2m_invalid); } +int arch_grant_map_page_identity(struct domain *d, unsigned long frame, + bool_t writeable) +{ + p2m_type_t t; + + if ( writeable ) + t = p2m_ram_rw; + else + t = p2m_ram_ro; + + return guest_physmap_add_entry(d, frame, frame, 0, t); +} + +int arch_grant_unmap_page_identity(struct domain *d, unsigned long frame) +{ + guest_physmap_remove_page(d, frame, frame, 0); + return 0; +} + int p2m_alloc_table(struct domain *d) { struct p2m_domain *p2m = &d->arch.p2m; diff --git a/xen/include/asm-arm/p2m.h b/xen/include/asm-arm/p2m.h index 911d32d..b682f51 100644 --- a/xen/include/asm-arm/p2m.h +++ b/xen/include/asm-arm/p2m.h @@ -181,6 +181,10 @@ static inline int get_page_and_type(struct page_info *page, return rc; } +int arch_grant_map_page_identity(struct domain *d, unsigned long frame, + bool_t writeable); +int arch_grant_unmap_page_identity(struct domain *d, unsigned long frame); + #endif /* _XEN_P2M_H */ /* diff --git a/xen/include/asm-x86/p2m.h b/xen/include/asm-x86/p2m.h index 0ddbadb..faead11 100644 --- a/xen/include/asm-x86/p2m.h +++ b/xen/include/asm-x86/p2m.h @@ -717,6 +717,19 @@ static inline unsigned int p2m_get_iommu_flags(p2m_type_t p2mt) return flags; } + +static inline int arch_grant_map_page_identity(struct domain *d, + unsigned long frame, + bool_t writeable) +{ + return -ENOSYS; +} + +static inline int arch_grant_unmap_page_identity(struct domain *d, + unsigned long frame) +{ + return -ENOSYS; +} #endif /* _XEN_P2M_H */ -- 1.7.10.4