From be81c8a1da24288b0231be50130a64f5cdffdcd4 Mon Sep 17 00:00:00 2001 From: Daniel Kiper Date: Mon, 30 Jun 2014 19:53:02 +0200 Subject: xen: Put EFI machinery in place This patch enables EFI usage under Xen dom0. Standard EFI Linux Kernel infrastructure cannot be used because it requires direct access to EFI data and code. However, in dom0 case it is not possible because above mentioned EFI stuff is fully owned and controlled by Xen hypervisor. In this case all calls from dom0 to EFI must be requested via special hypercall which in turn executes relevant EFI code in behalf of dom0. When dom0 kernel boots it checks for EFI availability on a machine. If it is detected then artificial EFI system table is filled. Native EFI callas are replaced by functions which mimics them by calling relevant hypercall. Later pointer to EFI system table is passed to standard EFI machinery and it continues EFI subsystem initialization taking into account that there is no direct access to EFI boot services, runtime, tables, structures, etc. After that system runs as usual. This patch is based on Jan Beulich and Tang Liang work. Signed-off-by: Jan Beulich Signed-off-by: Tang Liang Signed-off-by: Daniel Kiper Reviewed-by: David Vrabel Acked-by: Stefano Stabellini --- include/xen/xen-ops.h | 11 +++++++++++ 1 file changed, 11 insertions(+) (limited to 'include/xen') diff --git a/include/xen/xen-ops.h b/include/xen/xen-ops.h index 0b3149e..771bbba 100644 --- a/include/xen/xen-ops.h +++ b/include/xen/xen-ops.h @@ -3,6 +3,7 @@ #include #include +#include #include DECLARE_PER_CPU(struct vcpu_info *, xen_vcpu); @@ -35,4 +36,14 @@ int xen_unmap_domain_mfn_range(struct vm_area_struct *vma, int numpgs, struct page **pages); bool xen_running_on_version_or_later(unsigned int major, unsigned int minor); + +#ifdef CONFIG_XEN_EFI +extern efi_system_table_t *xen_efi_probe(void); +#else +static efi_system_table_t __init *xen_efi_probe(void) +{ + return NULL; +} +#endif + #endif /* INCLUDE_XEN_OPS_H */ -- cgit v1.1