Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753081Ab2JRA0u (ORCPT ); Wed, 17 Oct 2012 20:26:50 -0400 Received: from acsinet15.oracle.com ([141.146.126.227]:18832 "EHLO acsinet15.oracle.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752878Ab2JRA0t (ORCPT ); Wed, 17 Oct 2012 20:26:49 -0400 Date: Wed, 17 Oct 2012 17:26:42 -0700 From: Mukesh Rathor To: Konrad Rzeszutek Wilk , "Xen-devel@lists.xensource.com" , "linux-kernel@vger.kernel.org" Subject: [PATCH V3 1/6]: PVH: basic and header changes, elfnote changes, ... Message-ID: <20121017172642.349b2aae@mantra.us.oracle.com> Organization: Oracle Corporation X-Mailer: Claws Mail 3.7.6 (GTK+ 2.18.9; x86_64-redhat-linux-gnu) Mime-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit X-Source-IP: acsinet22.oracle.com [141.146.126.238] Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 5366 Lines: 141 [PATCH 1/6] PVH: is a PV linux guest that has extended capabilities. This patch allows it to be configured and enabled. Also, basic header file changes to add new subcalls to physmap hypercall. Lastly, mfn_to_local_pfn must return mfn for paging mode translate. Signed-off-by: Mukesh Rathor --- arch/x86/include/asm/xen/page.h | 3 +++ arch/x86/xen/Kconfig | 10 ++++++++++ arch/x86/xen/xen-head.S | 11 ++++++++++- include/xen/interface/memory.h | 24 +++++++++++++++++++++++- include/xen/interface/physdev.h | 10 ++++++++++ 5 files changed, 56 insertions(+), 2 deletions(-) diff --git a/arch/x86/include/asm/xen/page.h b/arch/x86/include/asm/xen/page.h index 472b9b7..6af440d 100644 --- a/arch/x86/include/asm/xen/page.h +++ b/arch/x86/include/asm/xen/page.h @@ -159,6 +159,9 @@ static inline xpaddr_t machine_to_phys(xmaddr_t machine) static inline unsigned long mfn_to_local_pfn(unsigned long mfn) { unsigned long pfn = mfn_to_pfn(mfn); + + if (xen_feature(XENFEAT_auto_translated_physmap)) + return mfn; if (get_phys_to_machine(pfn) != mfn) return -1; /* force !pfn_valid() */ return pfn; diff --git a/arch/x86/xen/Kconfig b/arch/x86/xen/Kconfig index fdce49c..822c5a0 100644 --- a/arch/x86/xen/Kconfig +++ b/arch/x86/xen/Kconfig @@ -50,3 +50,13 @@ config XEN_DEBUG_FS Enable statistics output and various tuning options in debugfs. Enabling this option may incur a significant performance overhead. +config XEN_X86_PVH + bool "Support for running as a PVH guest (EXPERIMENTAL)" + depends on X86_64 && XEN && EXPERIMENTAL + default n + help + This option enables support for running as a PVH guest (PV guest + using hardware extensions) under a suitably capable hypervisor. + This option is EXPERIMENTAL because the hypervisor interfaces + which it uses are not yet considered stable therefore backwards and + forwards compatibility is not yet guaranteed. If unsure, say N. diff --git a/arch/x86/xen/xen-head.S b/arch/x86/xen/xen-head.S index 7faed58..1a6bca1 100644 --- a/arch/x86/xen/xen-head.S +++ b/arch/x86/xen/xen-head.S @@ -13,6 +13,15 @@ #include #include +#ifdef CONFIG_XEN_X86_PVH +#define FEATURES_PVH "|writable_descriptor_tables" \ + "|auto_translated_physmap" \ + "|supervisor_mode_kernel" \ + "|hvm_callback_vector" +#else +#define FEATURES_PVH /* Not supported */ +#endif + __INIT ENTRY(startup_xen) cld @@ -95,7 +104,7 @@ NEXT_HYPERCALL(arch_6) #endif ELFNOTE(Xen, XEN_ELFNOTE_ENTRY, _ASM_PTR startup_xen) ELFNOTE(Xen, XEN_ELFNOTE_HYPERCALL_PAGE, _ASM_PTR hypercall_page) - ELFNOTE(Xen, XEN_ELFNOTE_FEATURES, .asciz "!writable_page_tables|pae_pgdir_above_4gb") + ELFNOTE(Xen, XEN_ELFNOTE_FEATURES, .asciz "!writable_page_tables|pae_pgdir_above_4gb"FEATURES_PVH) ELFNOTE(Xen, XEN_ELFNOTE_PAE_MODE, .asciz "yes") ELFNOTE(Xen, XEN_ELFNOTE_LOADER, .asciz "generic") ELFNOTE(Xen, XEN_ELFNOTE_L1_MFN_VALID, diff --git a/include/xen/interface/memory.h b/include/xen/interface/memory.h index d8e33a9..425911f 100644 --- a/include/xen/interface/memory.h +++ b/include/xen/interface/memory.h @@ -169,7 +169,13 @@ struct xen_add_to_physmap { /* Source mapping space. */ #define XENMAPSPACE_shared_info 0 /* shared info page */ #define XENMAPSPACE_grant_table 1 /* grant table page */ - unsigned int space; +#define XENMAPSPACE_gmfn 2 /* GMFN */ +#define XENMAPSPACE_gmfn_range 3 /* GMFN range */ +#define XENMAPSPACE_gmfn_foreign 4 /* GMFN from another guest */ + uint16_t space; + domid_t foreign_domid; /* IFF XENMAPSPACE_gmfn_foreign */ + +#define XENMAPIDX_grant_table_status 0x80000000 /* Index into source mapping space. */ unsigned long idx; @@ -237,4 +243,20 @@ DEFINE_GUEST_HANDLE_STRUCT(xen_memory_map); * during a driver critical region. */ extern spinlock_t xen_reservation_lock; + +/* + * Unmaps the page appearing at a particular GPFN from the specified guest's + * pseudophysical address space. + * arg == addr of xen_remove_from_physmap_t. + */ +#define XENMEM_remove_from_physmap 15 +struct xen_remove_from_physmap { + /* Which domain to change the mapping for. */ + domid_t domid; + + /* GPFN of the current mapping of the page. */ + xen_pfn_t gpfn; +}; +DEFINE_GUEST_HANDLE_STRUCT(xen_remove_from_physmap); + #endif /* __XEN_PUBLIC_MEMORY_H__ */ diff --git a/include/xen/interface/physdev.h b/include/xen/interface/physdev.h index 9ce788d..3b9d5b6 100644 --- a/include/xen/interface/physdev.h +++ b/include/xen/interface/physdev.h @@ -258,6 +258,16 @@ struct physdev_pci_device { uint8_t devfn; }; +#define PHYSDEVOP_pvh_map_iomem 30 +struct physdev_map_iomem { + /* IN */ + uint64_t first_gfn; + uint64_t first_mfn; + uint32_t nr_mfns; + uint32_t add_mapping; /* 1 == add mapping; 0 == unmap */ + +}; + /* * Notify that some PIRQ-bound event channels have been unmasked. * ** This command is obsolete since interface version 0x00030202 and is ** -- 1.7.2.3 -- 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/