diff options
Diffstat (limited to 'arch/arm/xen/enlighten.c')
| -rw-r--r-- | arch/arm/xen/enlighten.c | 22 |
1 files changed, 22 insertions, 0 deletions
diff --git a/arch/arm/xen/enlighten.c b/arch/arm/xen/enlighten.c index 13e3e9f9b094..d4f36eba3499 100644 --- a/arch/arm/xen/enlighten.c +++ b/arch/arm/xen/enlighten.c @@ -15,7 +15,9 @@ #include <asm/paravirt.h> #include <asm/xen/hypervisor.h> #include <asm/xen/hypercall.h> +#include <asm/xen/xen-ops.h> #include <asm/system_misc.h> +#include <asm/efi.h> #include <linux/interrupt.h> #include <linux/irqreturn.h> #include <linux/module.h> @@ -261,6 +263,19 @@ static int __init fdt_find_hyper_node(unsigned long node, const char *uname, !strncmp(hyper_node.prefix, s, strlen(hyper_node.prefix))) hyper_node.version = s + strlen(hyper_node.prefix); + /* + * Check if Xen supports EFI by checking whether there is the + * "/hypervisor/uefi" node in DT. If so, runtime services are available + * through proxy functions (e.g. in case of Xen dom0 EFI implementation + * they call special hypercall which executes relevant EFI functions) + * and that is why they are always enabled. + */ + if (IS_ENABLED(CONFIG_XEN_EFI)) { + if ((of_get_flat_dt_subnode_by_name(node, "uefi") > 0) && + !efi_runtime_disabled()) + set_bit(EFI_RUNTIME_SERVICES, &efi.flags); + } + return 0; } @@ -352,6 +367,13 @@ static int __init xen_guest_init(void) return -ENODEV; } + /* + * The fdt parsing codes have set EFI_RUNTIME_SERVICES if Xen EFI + * parameters are found. Force enable runtime services. + */ + if (efi_enabled(EFI_RUNTIME_SERVICES)) + xen_efi_runtime_setup(); + shared_info_page = (struct shared_info *)get_zeroed_page(GFP_KERNEL); if (!shared_info_page) { |