Merge tag 'pinctrl-v4.8-1' of git://git.kernel.org/pub/scm/linux/kernel/git/linusw...

[deliverable/linux.git] / arch / x86 / xen / efi.c

diff --git a/arch/x86/xen/efi.c b/arch/x86/xen/efi.c
index be14cc3e48d5fd8e0b5440396478a5c6a8932025..3be0121158539d5879d1fe993fd191b29574b6c9 100644 (file)
--- a/arch/x86/xen/efi.c
+++ b/arch/x86/xen/efi.c
@@ -20,10 +20,121 @@
 #include <linux/init.h>
 #include <linux/string.h>
 
+#include <xen/xen.h>
 #include <xen/xen-ops.h>
+#include <xen/interface/platform.h>
 
 #include <asm/page.h>
 #include <asm/setup.h>
+#include <asm/xen/hypercall.h>
+
+static efi_char16_t vendor[100] __initdata;
+
+static efi_system_table_t efi_systab_xen __initdata = {
+       .hdr = {
+               .signature      = EFI_SYSTEM_TABLE_SIGNATURE,
+               .revision       = 0, /* Initialized later. */
+               .headersize     = 0, /* Ignored by Linux Kernel. */
+               .crc32          = 0, /* Ignored by Linux Kernel. */
+               .reserved       = 0
+       },
+       .fw_vendor      = EFI_INVALID_TABLE_ADDR, /* Initialized later. */
+       .fw_revision    = 0,                      /* Initialized later. */
+       .con_in_handle  = EFI_INVALID_TABLE_ADDR, /* Not used under Xen. */
+       .con_in         = EFI_INVALID_TABLE_ADDR, /* Not used under Xen. */
+       .con_out_handle = EFI_INVALID_TABLE_ADDR, /* Not used under Xen. */
+       .con_out        = EFI_INVALID_TABLE_ADDR, /* Not used under Xen. */
+       .stderr_handle  = EFI_INVALID_TABLE_ADDR, /* Not used under Xen. */
+       .stderr         = EFI_INVALID_TABLE_ADDR, /* Not used under Xen. */
+       .runtime        = (efi_runtime_services_t *)EFI_INVALID_TABLE_ADDR,
+                                                 /* Not used under Xen. */
+       .boottime       = (efi_boot_services_t *)EFI_INVALID_TABLE_ADDR,
+                                                 /* Not used under Xen. */
+       .nr_tables      = 0,                      /* Initialized later. */
+       .tables         = EFI_INVALID_TABLE_ADDR  /* Initialized later. */
+};
+
+static const struct efi efi_xen __initconst = {
+       .systab                   = NULL, /* Initialized later. */
+       .runtime_version          = 0,    /* Initialized later. */
+       .mps                      = EFI_INVALID_TABLE_ADDR,
+       .acpi                     = EFI_INVALID_TABLE_ADDR,
+       .acpi20                   = EFI_INVALID_TABLE_ADDR,
+       .smbios                   = EFI_INVALID_TABLE_ADDR,
+       .smbios3                  = EFI_INVALID_TABLE_ADDR,
+       .sal_systab               = EFI_INVALID_TABLE_ADDR,
+       .boot_info                = EFI_INVALID_TABLE_ADDR,
+       .hcdp                     = EFI_INVALID_TABLE_ADDR,
+       .uga                      = EFI_INVALID_TABLE_ADDR,
+       .uv_systab                = EFI_INVALID_TABLE_ADDR,
+       .fw_vendor                = EFI_INVALID_TABLE_ADDR,
+       .runtime                  = EFI_INVALID_TABLE_ADDR,
+       .config_table             = EFI_INVALID_TABLE_ADDR,
+       .get_time                 = xen_efi_get_time,
+       .set_time                 = xen_efi_set_time,
+       .get_wakeup_time          = xen_efi_get_wakeup_time,
+       .set_wakeup_time          = xen_efi_set_wakeup_time,
+       .get_variable             = xen_efi_get_variable,
+       .get_next_variable        = xen_efi_get_next_variable,
+       .set_variable             = xen_efi_set_variable,
+       .query_variable_info      = xen_efi_query_variable_info,
+       .update_capsule           = xen_efi_update_capsule,
+       .query_capsule_caps       = xen_efi_query_capsule_caps,
+       .get_next_high_mono_count = xen_efi_get_next_high_mono_count,
+       .reset_system             = NULL, /* Functionality provided by Xen. */
+       .set_virtual_address_map  = NULL, /* Not used under Xen. */
+       .flags                    = 0     /* Initialized later. */
+};
+
+static efi_system_table_t __init *xen_efi_probe(void)
+{
+       struct xen_platform_op op = {
+               .cmd = XENPF_firmware_info,
+               .u.firmware_info = {
+                       .type = XEN_FW_EFI_INFO,
+                       .index = XEN_FW_EFI_CONFIG_TABLE
+               }
+       };
+       union xenpf_efi_info *info = &op.u.firmware_info.u.efi_info;
+
+       if (!xen_initial_domain() || HYPERVISOR_platform_op(&op) < 0)
+               return NULL;
+
+       /* Here we know that Xen runs on EFI platform. */
+
+       efi = efi_xen;
+
+       efi_systab_xen.tables = info->cfg.addr;
+       efi_systab_xen.nr_tables = info->cfg.nent;
+
+       op.cmd = XENPF_firmware_info;
+       op.u.firmware_info.type = XEN_FW_EFI_INFO;
+       op.u.firmware_info.index = XEN_FW_EFI_VENDOR;
+       info->vendor.bufsz = sizeof(vendor);
+       set_xen_guest_handle(info->vendor.name, vendor);
+
+       if (HYPERVISOR_platform_op(&op) == 0) {
+               efi_systab_xen.fw_vendor = __pa_symbol(vendor);
+               efi_systab_xen.fw_revision = info->vendor.revision;
+       } else
+               efi_systab_xen.fw_vendor = __pa_symbol(L"UNKNOWN");
+
+       op.cmd = XENPF_firmware_info;
+       op.u.firmware_info.type = XEN_FW_EFI_INFO;
+       op.u.firmware_info.index = XEN_FW_EFI_VERSION;
+
+       if (HYPERVISOR_platform_op(&op) == 0)
+               efi_systab_xen.hdr.revision = info->version;
+
+       op.cmd = XENPF_firmware_info;
+       op.u.firmware_info.type = XEN_FW_EFI_INFO;
+       op.u.firmware_info.index = XEN_FW_EFI_RT_VERSION;
+
+       if (HYPERVISOR_platform_op(&op) == 0)
+               efi.runtime_version = info->version;
+
+       return &efi_systab_xen;
+}
 
 void __init xen_efi_init(void)
 {