Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1756713Ab2JQLcp (ORCPT ); Wed, 17 Oct 2012 07:32:45 -0400 Received: from smtp.citrix.com ([66.165.176.89]:56272 "EHLO SMTP.CITRIX.COM" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1756224Ab2JQLcQ (ORCPT ); Wed, 17 Oct 2012 07:32:16 -0400 X-IronPort-AV: E=Sophos;i="4.80,600,1344211200"; d="scan'208";a="41487904" From: Ian Campbell To: Konrad Rzeszutek Wilk CC: Stefano Stabellini , Mukesh Rathor , linux-kernel@vger.kernel.org, xen-devel@lists.xen.org, Ian Campbell Subject: [PATCH 6/6] xen: x86 pvh: use XENMEM_add_to_physmap_range for foreign gmfn mappings Date: Wed, 17 Oct 2012 12:32:12 +0100 Message-ID: <1350473532-15863-6-git-send-email-ian.campbell@citrix.com> X-Mailer: git-send-email 1.7.2.5 In-Reply-To: <1350473518.2460.58.camel@zakaz.uk.xensource.com> References: <1350473518.2460.58.camel@zakaz.uk.xensource.com> MIME-Version: 1.0 Content-Type: text/plain Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 3591 Lines: 100 Squeezing the necessary fields into the existing XENMEM_add_to_physmap interface was proving to be a bit tricky so we have decided to go with a new interface upstream (the XENMAPSPACE_gmfn_foreign interface using XENMEM_add_to_physmap was never committed anywhere). This interface also allows for batching which was impossible to support at the same time as foreign mfns in the old interface. This reverts the relevant parts of "PVH: basic and header changes, elfnote changes, ..." and followups and trivially converts pvh_add_to_xen_p2m over. Signed-off-by: Ian Campbell --- arch/x86/xen/mmu.c | 18 ++++++++++++------ include/xen/interface/memory.h | 24 +++++++++++------------- 2 files changed, 23 insertions(+), 19 deletions(-) diff --git a/arch/x86/xen/mmu.c b/arch/x86/xen/mmu.c index d779e96..e7edcdd 100644 --- a/arch/x86/xen/mmu.c +++ b/arch/x86/xen/mmu.c @@ -2506,13 +2506,19 @@ static int pvh_add_to_xen_p2m(unsigned long lpfn, unsigned long fgmfn, unsigned int domid) { int rc; - struct xen_add_to_physmap xatp = { .u.foreign_domid = domid }; + struct xen_add_to_physmap_range xatp = { + .domid = DOMID_SELF, + .foreign_domid = domid, + .size = 1, + .space = XENMAPSPACE_gmfn_foreign, + }; + xen_ulong_t idx = fgmfn; + xen_pfn_t gpfn = lpfn; + + set_xen_guest_handle(xatp.idxs, &idx); + set_xen_guest_handle(xatp.gpfns, &gpfn); - xatp.gpfn = lpfn; - xatp.idx = fgmfn; - xatp.domid = DOMID_SELF; - xatp.space = XENMAPSPACE_gmfn_foreign; - rc = HYPERVISOR_memory_op(XENMEM_add_to_physmap, &xatp); + rc = HYPERVISOR_memory_op(XENMEM_add_to_physmap_range, &xatp); if (rc) pr_warn("d0: Failed to map pfn (0x%lx) to mfn (0x%lx) rc:%d\n", lpfn, fgmfn, rc); diff --git a/include/xen/interface/memory.h b/include/xen/interface/memory.h index eb2d3e5..b40a431 100644 --- a/include/xen/interface/memory.h +++ b/include/xen/interface/memory.h @@ -153,6 +153,14 @@ struct xen_machphys_mapping { }; DEFINE_GUEST_HANDLE_STRUCT(xen_machphys_mapping_t); +#define XENMAPSPACE_shared_info 0 /* shared info page */ +#define XENMAPSPACE_grant_table 1 /* grant table page */ +#define XENMAPSPACE_gmfn 2 /* GMFN */ +#define XENMAPSPACE_gmfn_range 3 /* GMFN range, XENMEM_add_to_physmap only. */ +#define XENMAPSPACE_gmfn_foreign 4 /* GMFN from another dom, + * XENMEM_add_to_physmap_range only. + */ + /* * Sets the GPFN at which a particular page appears in the specified guest's * pseudophysical address space. @@ -163,22 +171,12 @@ struct xen_add_to_physmap { /* Which domain to change the mapping for. */ domid_t domid; - union { - /* Number of pages to go through for gmfn_range */ - uint16_t size; - /* IFF XENMAPSPACE_gmfn_foreign */ - domid_t foreign_domid; - } u; + /* Number of pages to go through for gmfn_range */ + uint16_t size; + /* Source mapping space. */ -#define XENMAPSPACE_shared_info 0 /* shared info page */ -#define XENMAPSPACE_grant_table 1 /* grant table page */ -#define XENMAPSPACE_gmfn 2 /* GMFN */ -#define XENMAPSPACE_gmfn_range 3 /* GMFN range */ -#define XENMAPSPACE_gmfn_foreign 4 /* GMFN from another guest */ unsigned int space; -#define XENMAPIDX_grant_table_status 0x80000000 - /* Index into source mapping space. */ xen_ulong_t idx; -- 1.7.2.5 -- 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/