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https://github.com/torvalds/linux
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342cd340f6
I discovered that some needed stuff is defined/declared in headers which are not included directly. Currently it works but if somebody remove required headers from currently included headers then build will break. So, just in case directly include all needed headers. Signed-off-by: Daniel Kiper <daniel.kiper@oracle.com> Signed-off-by: David Vrabel <david.vrabel@citrix.com>
371 lines
11 KiB
C
371 lines
11 KiB
C
/*
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* EFI support for Xen.
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*
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* Copyright (C) 1999 VA Linux Systems
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* Copyright (C) 1999 Walt Drummond <drummond@valinux.com>
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* Copyright (C) 1999-2002 Hewlett-Packard Co.
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* David Mosberger-Tang <davidm@hpl.hp.com>
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* Stephane Eranian <eranian@hpl.hp.com>
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* Copyright (C) 2005-2008 Intel Co.
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* Fenghua Yu <fenghua.yu@intel.com>
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* Bibo Mao <bibo.mao@intel.com>
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* Chandramouli Narayanan <mouli@linux.intel.com>
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* Huang Ying <ying.huang@intel.com>
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* Copyright (C) 2011 Novell Co.
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* Jan Beulich <JBeulich@suse.com>
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* Copyright (C) 2011-2012 Oracle Co.
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* Liang Tang <liang.tang@oracle.com>
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* Copyright (c) 2014 Oracle Co., Daniel Kiper
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*/
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#include <linux/bug.h>
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#include <linux/efi.h>
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#include <linux/init.h>
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#include <linux/string.h>
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#include <xen/interface/xen.h>
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#include <xen/interface/platform.h>
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#include <xen/xen.h>
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#include <asm/page.h>
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#include <asm/xen/hypercall.h>
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#define INIT_EFI_OP(name) \
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{.cmd = XENPF_efi_runtime_call, \
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.u.efi_runtime_call.function = XEN_EFI_##name, \
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.u.efi_runtime_call.misc = 0}
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#define efi_data(op) (op.u.efi_runtime_call)
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static efi_status_t xen_efi_get_time(efi_time_t *tm, efi_time_cap_t *tc)
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{
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struct xen_platform_op op = INIT_EFI_OP(get_time);
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if (HYPERVISOR_dom0_op(&op) < 0)
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return EFI_UNSUPPORTED;
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if (tm) {
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BUILD_BUG_ON(sizeof(*tm) != sizeof(efi_data(op).u.get_time.time));
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memcpy(tm, &efi_data(op).u.get_time.time, sizeof(*tm));
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}
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if (tc) {
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tc->resolution = efi_data(op).u.get_time.resolution;
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tc->accuracy = efi_data(op).u.get_time.accuracy;
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tc->sets_to_zero = !!(efi_data(op).misc &
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XEN_EFI_GET_TIME_SET_CLEARS_NS);
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}
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return efi_data(op).status;
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}
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static efi_status_t xen_efi_set_time(efi_time_t *tm)
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{
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struct xen_platform_op op = INIT_EFI_OP(set_time);
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BUILD_BUG_ON(sizeof(*tm) != sizeof(efi_data(op).u.set_time));
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memcpy(&efi_data(op).u.set_time, tm, sizeof(*tm));
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if (HYPERVISOR_dom0_op(&op) < 0)
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return EFI_UNSUPPORTED;
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return efi_data(op).status;
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}
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static efi_status_t xen_efi_get_wakeup_time(efi_bool_t *enabled,
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efi_bool_t *pending,
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efi_time_t *tm)
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{
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struct xen_platform_op op = INIT_EFI_OP(get_wakeup_time);
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if (HYPERVISOR_dom0_op(&op) < 0)
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return EFI_UNSUPPORTED;
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if (tm) {
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BUILD_BUG_ON(sizeof(*tm) != sizeof(efi_data(op).u.get_wakeup_time));
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memcpy(tm, &efi_data(op).u.get_wakeup_time, sizeof(*tm));
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}
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if (enabled)
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*enabled = !!(efi_data(op).misc & XEN_EFI_GET_WAKEUP_TIME_ENABLED);
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if (pending)
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*pending = !!(efi_data(op).misc & XEN_EFI_GET_WAKEUP_TIME_PENDING);
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return efi_data(op).status;
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}
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static efi_status_t xen_efi_set_wakeup_time(efi_bool_t enabled, efi_time_t *tm)
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{
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struct xen_platform_op op = INIT_EFI_OP(set_wakeup_time);
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BUILD_BUG_ON(sizeof(*tm) != sizeof(efi_data(op).u.set_wakeup_time));
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if (enabled)
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efi_data(op).misc = XEN_EFI_SET_WAKEUP_TIME_ENABLE;
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if (tm)
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memcpy(&efi_data(op).u.set_wakeup_time, tm, sizeof(*tm));
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else
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efi_data(op).misc |= XEN_EFI_SET_WAKEUP_TIME_ENABLE_ONLY;
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if (HYPERVISOR_dom0_op(&op) < 0)
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return EFI_UNSUPPORTED;
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return efi_data(op).status;
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}
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static efi_status_t xen_efi_get_variable(efi_char16_t *name,
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efi_guid_t *vendor,
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u32 *attr,
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unsigned long *data_size,
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void *data)
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{
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struct xen_platform_op op = INIT_EFI_OP(get_variable);
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set_xen_guest_handle(efi_data(op).u.get_variable.name, name);
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BUILD_BUG_ON(sizeof(*vendor) !=
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sizeof(efi_data(op).u.get_variable.vendor_guid));
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memcpy(&efi_data(op).u.get_variable.vendor_guid, vendor, sizeof(*vendor));
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efi_data(op).u.get_variable.size = *data_size;
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set_xen_guest_handle(efi_data(op).u.get_variable.data, data);
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if (HYPERVISOR_dom0_op(&op) < 0)
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return EFI_UNSUPPORTED;
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*data_size = efi_data(op).u.get_variable.size;
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if (attr)
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*attr = efi_data(op).misc;
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return efi_data(op).status;
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}
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static efi_status_t xen_efi_get_next_variable(unsigned long *name_size,
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efi_char16_t *name,
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efi_guid_t *vendor)
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{
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struct xen_platform_op op = INIT_EFI_OP(get_next_variable_name);
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efi_data(op).u.get_next_variable_name.size = *name_size;
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set_xen_guest_handle(efi_data(op).u.get_next_variable_name.name, name);
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BUILD_BUG_ON(sizeof(*vendor) !=
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sizeof(efi_data(op).u.get_next_variable_name.vendor_guid));
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memcpy(&efi_data(op).u.get_next_variable_name.vendor_guid, vendor,
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sizeof(*vendor));
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if (HYPERVISOR_dom0_op(&op) < 0)
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return EFI_UNSUPPORTED;
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*name_size = efi_data(op).u.get_next_variable_name.size;
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memcpy(vendor, &efi_data(op).u.get_next_variable_name.vendor_guid,
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sizeof(*vendor));
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return efi_data(op).status;
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}
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static efi_status_t xen_efi_set_variable(efi_char16_t *name,
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efi_guid_t *vendor,
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u32 attr,
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unsigned long data_size,
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void *data)
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{
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struct xen_platform_op op = INIT_EFI_OP(set_variable);
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set_xen_guest_handle(efi_data(op).u.set_variable.name, name);
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efi_data(op).misc = attr;
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BUILD_BUG_ON(sizeof(*vendor) !=
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sizeof(efi_data(op).u.set_variable.vendor_guid));
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memcpy(&efi_data(op).u.set_variable.vendor_guid, vendor, sizeof(*vendor));
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efi_data(op).u.set_variable.size = data_size;
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set_xen_guest_handle(efi_data(op).u.set_variable.data, data);
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if (HYPERVISOR_dom0_op(&op) < 0)
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return EFI_UNSUPPORTED;
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return efi_data(op).status;
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}
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static efi_status_t xen_efi_query_variable_info(u32 attr,
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u64 *storage_space,
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u64 *remaining_space,
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u64 *max_variable_size)
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{
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struct xen_platform_op op = INIT_EFI_OP(query_variable_info);
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if (efi.runtime_version < EFI_2_00_SYSTEM_TABLE_REVISION)
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return EFI_UNSUPPORTED;
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efi_data(op).u.query_variable_info.attr = attr;
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if (HYPERVISOR_dom0_op(&op) < 0)
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return EFI_UNSUPPORTED;
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*storage_space = efi_data(op).u.query_variable_info.max_store_size;
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*remaining_space = efi_data(op).u.query_variable_info.remain_store_size;
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*max_variable_size = efi_data(op).u.query_variable_info.max_size;
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return efi_data(op).status;
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}
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static efi_status_t xen_efi_get_next_high_mono_count(u32 *count)
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{
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struct xen_platform_op op = INIT_EFI_OP(get_next_high_monotonic_count);
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if (HYPERVISOR_dom0_op(&op) < 0)
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return EFI_UNSUPPORTED;
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*count = efi_data(op).misc;
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return efi_data(op).status;
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}
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static efi_status_t xen_efi_update_capsule(efi_capsule_header_t **capsules,
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unsigned long count,
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unsigned long sg_list)
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{
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struct xen_platform_op op = INIT_EFI_OP(update_capsule);
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if (efi.runtime_version < EFI_2_00_SYSTEM_TABLE_REVISION)
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return EFI_UNSUPPORTED;
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set_xen_guest_handle(efi_data(op).u.update_capsule.capsule_header_array,
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capsules);
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efi_data(op).u.update_capsule.capsule_count = count;
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efi_data(op).u.update_capsule.sg_list = sg_list;
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if (HYPERVISOR_dom0_op(&op) < 0)
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return EFI_UNSUPPORTED;
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return efi_data(op).status;
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}
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static efi_status_t xen_efi_query_capsule_caps(efi_capsule_header_t **capsules,
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unsigned long count,
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u64 *max_size,
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int *reset_type)
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{
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struct xen_platform_op op = INIT_EFI_OP(query_capsule_capabilities);
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if (efi.runtime_version < EFI_2_00_SYSTEM_TABLE_REVISION)
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return EFI_UNSUPPORTED;
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set_xen_guest_handle(efi_data(op).u.query_capsule_capabilities.capsule_header_array,
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capsules);
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efi_data(op).u.query_capsule_capabilities.capsule_count = count;
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if (HYPERVISOR_dom0_op(&op) < 0)
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return EFI_UNSUPPORTED;
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*max_size = efi_data(op).u.query_capsule_capabilities.max_capsule_size;
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*reset_type = efi_data(op).u.query_capsule_capabilities.reset_type;
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return efi_data(op).status;
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}
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static efi_char16_t vendor[100] __initdata;
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static efi_system_table_t efi_systab_xen __initdata = {
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.hdr = {
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.signature = EFI_SYSTEM_TABLE_SIGNATURE,
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.revision = 0, /* Initialized later. */
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.headersize = 0, /* Ignored by Linux Kernel. */
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.crc32 = 0, /* Ignored by Linux Kernel. */
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.reserved = 0
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},
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.fw_vendor = EFI_INVALID_TABLE_ADDR, /* Initialized later. */
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.fw_revision = 0, /* Initialized later. */
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.con_in_handle = EFI_INVALID_TABLE_ADDR, /* Not used under Xen. */
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.con_in = EFI_INVALID_TABLE_ADDR, /* Not used under Xen. */
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.con_out_handle = EFI_INVALID_TABLE_ADDR, /* Not used under Xen. */
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.con_out = EFI_INVALID_TABLE_ADDR, /* Not used under Xen. */
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.stderr_handle = EFI_INVALID_TABLE_ADDR, /* Not used under Xen. */
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.stderr = EFI_INVALID_TABLE_ADDR, /* Not used under Xen. */
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.runtime = (efi_runtime_services_t *)EFI_INVALID_TABLE_ADDR,
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/* Not used under Xen. */
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.boottime = (efi_boot_services_t *)EFI_INVALID_TABLE_ADDR,
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/* Not used under Xen. */
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.nr_tables = 0, /* Initialized later. */
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.tables = EFI_INVALID_TABLE_ADDR /* Initialized later. */
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};
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static const struct efi efi_xen __initconst = {
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.systab = NULL, /* Initialized later. */
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.runtime_version = 0, /* Initialized later. */
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.mps = EFI_INVALID_TABLE_ADDR,
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.acpi = EFI_INVALID_TABLE_ADDR,
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.acpi20 = EFI_INVALID_TABLE_ADDR,
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.smbios = EFI_INVALID_TABLE_ADDR,
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.sal_systab = EFI_INVALID_TABLE_ADDR,
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.boot_info = EFI_INVALID_TABLE_ADDR,
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.hcdp = EFI_INVALID_TABLE_ADDR,
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.uga = EFI_INVALID_TABLE_ADDR,
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.uv_systab = EFI_INVALID_TABLE_ADDR,
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.fw_vendor = EFI_INVALID_TABLE_ADDR,
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.runtime = EFI_INVALID_TABLE_ADDR,
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.config_table = EFI_INVALID_TABLE_ADDR,
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.get_time = xen_efi_get_time,
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.set_time = xen_efi_set_time,
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.get_wakeup_time = xen_efi_get_wakeup_time,
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.set_wakeup_time = xen_efi_set_wakeup_time,
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.get_variable = xen_efi_get_variable,
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.get_next_variable = xen_efi_get_next_variable,
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.set_variable = xen_efi_set_variable,
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.query_variable_info = xen_efi_query_variable_info,
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.update_capsule = xen_efi_update_capsule,
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.query_capsule_caps = xen_efi_query_capsule_caps,
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.get_next_high_mono_count = xen_efi_get_next_high_mono_count,
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.reset_system = NULL, /* Functionality provided by Xen. */
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.set_virtual_address_map = NULL, /* Not used under Xen. */
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.memmap = NULL, /* Not used under Xen. */
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.flags = 0 /* Initialized later. */
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};
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efi_system_table_t __init *xen_efi_probe(void)
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{
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struct xen_platform_op op = {
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.cmd = XENPF_firmware_info,
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.u.firmware_info = {
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.type = XEN_FW_EFI_INFO,
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.index = XEN_FW_EFI_CONFIG_TABLE
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}
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};
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union xenpf_efi_info *info = &op.u.firmware_info.u.efi_info;
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if (!xen_initial_domain() || HYPERVISOR_dom0_op(&op) < 0)
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return NULL;
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/* Here we know that Xen runs on EFI platform. */
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efi = efi_xen;
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efi_systab_xen.tables = info->cfg.addr;
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efi_systab_xen.nr_tables = info->cfg.nent;
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op.cmd = XENPF_firmware_info;
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op.u.firmware_info.type = XEN_FW_EFI_INFO;
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op.u.firmware_info.index = XEN_FW_EFI_VENDOR;
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info->vendor.bufsz = sizeof(vendor);
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set_xen_guest_handle(info->vendor.name, vendor);
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if (HYPERVISOR_dom0_op(&op) == 0) {
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efi_systab_xen.fw_vendor = __pa_symbol(vendor);
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efi_systab_xen.fw_revision = info->vendor.revision;
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} else
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efi_systab_xen.fw_vendor = __pa_symbol(L"UNKNOWN");
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op.cmd = XENPF_firmware_info;
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op.u.firmware_info.type = XEN_FW_EFI_INFO;
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op.u.firmware_info.index = XEN_FW_EFI_VERSION;
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if (HYPERVISOR_dom0_op(&op) == 0)
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efi_systab_xen.hdr.revision = info->version;
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op.cmd = XENPF_firmware_info;
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op.u.firmware_info.type = XEN_FW_EFI_INFO;
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op.u.firmware_info.index = XEN_FW_EFI_RT_VERSION;
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if (HYPERVISOR_dom0_op(&op) == 0)
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efi.runtime_version = info->version;
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return &efi_systab_xen;
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}
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