x86, uv: Update UV arch to target Legacy VGA I/O correctly.

[pandora-kernel.git] / arch / x86 / kernel / bios_uv.c

diff --git a/arch/x86/kernel/bios_uv.c b/arch/x86/kernel/bios_uv.c
index b0206a2..575127a 100644 (file)
--- a/arch/x86/kernel/bios_uv.c
+++ b/arch/x86/kernel/bios_uv.c
@@ -154,6 +154,25 @@ s64 uv_bios_freq_base(u64 clock_type, u64 *ticks_per_second)
 }
 EXPORT_SYMBOL_GPL(uv_bios_freq_base);
 
+/*
+ * uv_bios_set_legacy_vga_target - Set Legacy VGA I/O Target
+ * @decode: true to enable target, false to disable target
+ * @domain: PCI domain number
+ * @bus: PCI bus number
+ *
+ * Returns:
+ *    0: Success
+ *    -EINVAL: Invalid domain or bus number
+ *    -ENOSYS: Capability not available
+ *    -EBUSY: Legacy VGA I/O cannot be retargeted at this time
+ */
+int uv_bios_set_legacy_vga_target(bool decode, int domain, int bus)
+{
+       return uv_bios_call(UV_BIOS_SET_LEGACY_VGA_TARGET,
+                               (u64)decode, (u64)domain, (u64)bus, 0, 0);
+}
+EXPORT_SYMBOL_GPL(uv_bios_set_legacy_vga_target);
+
 
 #ifdef CONFIG_EFI
 void uv_bios_init(void)