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ARM64: XEN: Add a function to initialize Xen specific UEFI runtime services 

When running on Xen hypervisor, runtime services are supported through
hypercall. Add a Xen specific function to initialize runtime services.

Signed-off-by: Shannon Zhao <shannon.zhao@linaro.org>
Reviewed-by: Stefano Stabellini <stefano.stabellini@eu.citrix.com>
Tested-by: Julien Grall <julien.grall@arm.com>
Acked-by: Catalin Marinas <catalin.marinas@arm.com>
This commit is contained in:
Shannon Zhao 2016-04-07 20:03:32 +08:00 committed by David Vrabel
parent a62ed50030
commit be1aaf4e40
6 changed files with 55 additions and 1 deletions
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6
arch/arm/include/asm/xen/xen-ops.h Normal file
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@ -0,0 +1,6 @@
#ifndef _ASM_XEN_OPS_H
#define _ASM_XEN_OPS_H
void xen_efi_runtime_setup(void);
#endif /* _ASM_XEN_OPS_H */

1
arch/arm/xen/Makefile
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@ -1 +1,2 @@
obj-y := enlighten.o hypercall.o grant-table.o p2m.o mm.o
obj-$(CONFIG_XEN_EFI) += efi.o

40
arch/arm/xen/efi.c Normal file
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@ -0,0 +1,40 @@
/*
* Copyright (c) 2015, Linaro Limited, Shannon Zhao
*
* 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, see <http://www.gnu.org/licenses/>.
*/
#include <linux/efi.h>
#include <xen/xen-ops.h>
#include <asm/xen/xen-ops.h>
/* Set XEN EFI runtime services function pointers. Other fields of struct efi,
* e.g. efi.systab, will be set like normal EFI.
*/
void __init xen_efi_runtime_setup(void)
{
efi.get_time = xen_efi_get_time;
efi.set_time = xen_efi_set_time;
efi.get_wakeup_time = xen_efi_get_wakeup_time;
efi.set_wakeup_time = xen_efi_set_wakeup_time;
efi.get_variable = xen_efi_get_variable;
efi.get_next_variable = xen_efi_get_next_variable;
efi.set_variable = xen_efi_set_variable;
efi.query_variable_info = xen_efi_query_variable_info;
efi.update_capsule = xen_efi_update_capsule;
efi.query_capsule_caps = xen_efi_query_capsule_caps;
efi.get_next_high_mono_count = xen_efi_get_next_high_mono_count;
efi.reset_system = NULL; /* Functionality provided by Xen. */
}
EXPORT_SYMBOL_GPL(xen_efi_runtime_setup);

6
arch/arm64/include/asm/xen/xen-ops.h Normal file
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@ -0,0 +1,6 @@
#ifndef _ASM_XEN_OPS_H
#define _ASM_XEN_OPS_H
void xen_efi_runtime_setup(void);
#endif /* _ASM_XEN_OPS_H */

1
arch/arm64/xen/Makefile
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@ -1,2 +1,3 @@
xen-arm-y += $(addprefix ../../arm/xen/, enlighten.o grant-table.o p2m.o mm.o)
obj-y := xen-arm.o hypercall.o
obj-$(CONFIG_XEN_EFI) += $(addprefix ../../arm/xen/, efi.o)

2
drivers/xen/Kconfig
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@ -275,7 +275,7 @@ config XEN_HAVE_PVMMU
config XEN_EFI
def_bool y
depends on X86_64 && EFI
depends on (ARM || ARM64 || X86_64) && EFI
config XEN_AUTO_XLATE
def_bool y