Akio Takebe wrote:
Hi, Isaku Thank you for your work. one small comment.On ia64/xen, pointer argument for the hypercall is passed by pseudo physical address (guest physical address.) So it is necessary to convert virtual address into pseudo physical address right before issuing hypercall. The frame work is called xencomm. This patch implements arch specific part. Signed-off-by: Alex Williamson <alex.williamson@xxxxxx> Signed-off-by: Isaku Yamahata <yamahata@xxxxxxxxxxxxx> Cc: "Luck, Tony" <tony.luck@xxxxxxxxx> --- arch/ia64/xen/Makefile | 2 +- arch/ia64/xen/xencomm.c | 94 ++++++++++++++++++++++++++++++++++++++ ++ include/asm-ia64/xen/xencomm.h | 41 +++++++++++++++++ 3 files changed, 136 insertions(+), 1 deletions(-) create mode 100644 arch/ia64/xen/xencomm.c create mode 100644 include/asm-ia64/xen/xencomm.h diff --git a/arch/ia64/xen/Makefile b/arch/ia64/xen/Makefile index c200704..ad0c9f7 100644 --- a/arch/ia64/xen/Makefile +++ b/arch/ia64/xen/Makefile @@ -2,4 +2,4 @@ # Makefile for Xen components # -obj-y := hypercall.o +obj-y := hypercall.o xencomm.o diff --git a/arch/ia64/xen/xencomm.c b/arch/ia64/xen/xencomm.c new file mode 100644 index 0000000..2a57058 --- /dev/null +++ b/arch/ia64/xen/xencomm.c @@ -0,0 +1,94 @@ +/* + * Copyright (C) 2006 Hollis Blanchard <hollisb@xxxxxxxxxx>, IBM Corporation + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA + */ + +#include <linux/mm.h> + +static unsigned long kernel_virtual_offset; + +void +xencomm_initialize(void) +{ + kernel_virtual_offset = KERNEL_START - ia64_tpa(KERNEL_START); +} + +/* Translate virtual address to physical address. */ +unsigned long +xencomm_vtop(unsigned long vaddr) +{ + struct page *page; + struct vm_area_struct *vma; + + if (vaddr == 0) + return 0; +It should be "return 0UL";
Not necessary. J -- To unsubscribe from this list: send the line "unsubscribe linux-ia64" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
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