[PATCH v4 13/19] efi: EFI_RS bit in efi.flags must be controlled by efi=[no-]rs command line argument

[Daniel Kiper <daniel.kiper@oracle.com>]

Otherwise efi_enabled(EFI_RS) check is unreliable.

Signed-off-by: Daniel Kiper <daniel.kiper@oracle.com>
---
 xen/common/efi/boot.c |   10 ++++++----
 1 file changed, 6 insertions(+), 4 deletions(-)

diff --git a/xen/common/efi/boot.c b/xen/common/efi/boot.c
index dd6b0a8..95cb25f 100644
--- a/xen/common/efi/boot.c
+++ b/xen/common/efi/boot.c
@@ -1159,7 +1159,6 @@ efi_start(EFI_HANDLE ImageHandle, EFI_SYSTEM_TABLE *SystemTable)
 
 #ifndef CONFIG_ARM /* TODO - runtime service support */
 
-static bool_t __initdata efi_rs_enable = 1;
 static bool_t __initdata efi_map_uc;
 
 static void __init parse_efi_param(char *s)
@@ -1177,7 +1176,10 @@ static void __init parse_efi_param(char *s)
             *ss = '\0';
 
         if ( !strcmp(s, "rs") )
-            efi_rs_enable = val;
+        {
+            if ( !val )
+                __clear_bit(EFI_RS, &efi.flags);
+        }
         else if ( !strcmp(s, "attr=uc") )
             efi_map_uc = val;
 
@@ -1260,7 +1262,7 @@ void __init efi_init_memory(void)
                desc->PhysicalStart, desc->PhysicalStart + len - 1,
                desc->Type, desc->Attribute);
 
-        if ( !efi_rs_enable ||
+        if ( !efi_enabled(EFI_RS) ||
              (!(desc->Attribute & EFI_MEMORY_RUNTIME) &&
               (!map_bs ||
                (desc->Type != EfiBootServicesCode &&
@@ -1334,7 +1336,7 @@ void __init efi_init_memory(void)
         }
     }
 
-    if ( !efi_rs_enable )
+    if ( !efi_enabled(EFI_RS) )
     {
         efi_fw_vendor = NULL;
         return;
-- 
1.7.10.4


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