Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S933299Ab2JTBaY (ORCPT ); Fri, 19 Oct 2012 21:30:24 -0400 Received: from rcsinet15.oracle.com ([148.87.113.117]:18150 "EHLO rcsinet15.oracle.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S932505Ab2JTBaT (ORCPT ); Fri, 19 Oct 2012 21:30:19 -0400 From: Konrad Rzeszutek Wilk To: linux-kernel@vger.kernel.org, xen-devel@lists.xensource.com, mukesh.rathor@oracle.com, Ian.Campbell@citrix.com, stefano.stabellini@eu.citrix.com Cc: Konrad Rzeszutek Wilk Subject: [PATCH 1/6] xen/pvh: Support ParaVirtualized Hardware extensions. Date: Fri, 19 Oct 2012 21:17:57 -0400 Message-Id: <1350695882-12820-2-git-send-email-konrad.wilk@oracle.com> X-Mailer: git-send-email 1.7.7.6 In-Reply-To: <1350695882-12820-1-git-send-email-konrad.wilk@oracle.com> References: <1350695882-12820-1-git-send-email-konrad.wilk@oracle.com> X-Source-IP: ucsinet22.oracle.com [156.151.31.94] Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 5556 Lines: 151 From: Mukesh Rathor PVH allows PV linux guest to utilize hardware extended capabilities, such as running MMU updates in a HVM container. 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 (since we let the hypervisor - or CPU - do them for us). Signed-off-by: Mukesh Rathor Signed-off-by: Konrad Rzeszutek Wilk --- 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 b66d04c..8beebdb 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. */ xen_ulong_t 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 1844d31..83050d3 100644 --- a/include/xen/interface/physdev.h +++ b/include/xen/interface/physdev.h @@ -274,6 +274,16 @@ struct physdev_dbgp_op { } u; }; +#define PHYSDEVOP_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 ** -- 1.7.7.6 -- 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/