Re: [PATCH v3 15/17] ARM64: XEN: Add a function to initialize Xen specific UEFI runtime services
From: Stefano Stabellini
Date: Mon Jan 25 2016 - 11:48:37 EST
On Sat, 23 Jan 2016, Shannon Zhao wrote:
> From: Shannon Zhao <shannon.zhao@xxxxxxxxxx>
>
> 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@xxxxxxxxxx>
> ---
> arch/arm64/include/asm/xen/xen-ops.h | 6 ++++++
> arch/arm64/xen/Makefile | 1 +
> arch/arm64/xen/efi.c | 40 ++++++++++++++++++++++++++++++++++++
> drivers/xen/Kconfig | 2 +-
> 4 files changed, 48 insertions(+), 1 deletion(-)
> create mode 100644 arch/arm64/include/asm/xen/xen-ops.h
> create mode 100644 arch/arm64/xen/efi.c
>
> diff --git a/arch/arm64/include/asm/xen/xen-ops.h b/arch/arm64/include/asm/xen/xen-ops.h
> new file mode 100644
> index 0000000..ec154e7
> --- /dev/null
> +++ b/arch/arm64/include/asm/xen/xen-ops.h
> @@ -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 */
> diff --git a/arch/arm64/xen/Makefile b/arch/arm64/xen/Makefile
> index 74a8d87..62e6fe2 100644
> --- a/arch/arm64/xen/Makefile
> +++ b/arch/arm64/xen/Makefile
> @@ -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) += efi.o
> diff --git a/arch/arm64/xen/efi.c b/arch/arm64/xen/efi.c
> new file mode 100644
> index 0000000..b9cae65
> --- /dev/null
> +++ b/arch/arm64/xen/efi.c
> @@ -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 fileds of struct efi,
^ fields
Reviewed-by: Stefano Stabellini <stefano.stabellini@xxxxxxxxxxxxx>
> + * 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);
> diff --git a/drivers/xen/Kconfig b/drivers/xen/Kconfig
> index 73708ac..27d216a 100644
> --- a/drivers/xen/Kconfig
> +++ b/drivers/xen/Kconfig
> @@ -268,7 +268,7 @@ config XEN_HAVE_PVMMU
>
> config XEN_EFI
> def_bool y
> - depends on X86_64 && EFI
> + depends on (ARM64 || X86_64) && EFI
>
> config XEN_AUTO_XLATE
> def_bool y
> --
> 2.0.4
>
>