x86: uv: Add UV reserved page bios call

Add UV bios call to get the address of the reserved page.

Signed-off-by: Russ Anderson <rja@sgi.com>
Signed-off-by: H. Peter Anvin <hpa@zytor.com>

1 files changed, 11 insertions, 0 deletions

diff --git a/arch/x86/kernel/bios_uv.c b/arch/x86/kernel/bios_uv.c
index 7cf6fc3d1c10..d22d0f1bbea0 100644
--- a/arch/x86/kernel/bios_uv.c
+++ b/arch/x86/kernel/bios_uv.c
@@ -142,6 +142,17 @@ uv_bios_change_memprotect(u64 paddr, u64 len, enum uv_memprotect perms)
 }
 EXPORT_SYMBOL_GPL(uv_bios_change_memprotect);
 
+s64
+uv_bios_reserved_page_pa(u64 buf, u64 *cookie, u64 *addr, u64 *len)
+{
+        s64 ret;
+
+        ret = uv_bios_call_irqsave(UV_BIOS_GET_PARTITION_ADDR, (u64)cookie,
+                                        (u64)addr, buf, (u64)len, 0);
+        return ret;
+}
+EXPORT_SYMBOL_GPL(uv_bios_reserved_page_pa);
+
 s64 uv_bios_freq_base(u64 clock_type, u64 *ticks_per_second)
 {
         return uv_bios_call(UV_BIOS_FREQ_BASE, clock_type,