From d9601217fc64ed518d91613e5424deb015cea70f Mon Sep 17 00:00:00 2001
From: Robert Richter <robert.richter@amd.com>
Date: Fri, 22 Aug 2008 20:23:37 +0200
Subject: [PATCH] x86: fix: do not run code in amd_bus.c on non-AMD CPUs
Jan Beulich wrote:
> Even worse - this would even try to access the MSR on non-AMD CPUs
> (currently probably prevented just by the fact that only AMD ones use
> family values of 0x10 or higher).
This patch adds cpu vendor check to the postcore_initcalls.
Reported-by: Jan Beulich <jbeulich@novell.com>
Signed-off-by: Robert Richter <robert.richter@amd.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
---
arch/x86/pci/amd_bus.c | 19 ++++++++++++++++---
1 file changed, 16 insertions(+), 3 deletions(-)
diff --git a/arch/x86/pci/amd_bus.c b/arch/x86/pci/amd_bus.c
index dbf5323697110..4a6f1a6a3aa95 100644
--- a/arch/x86/pci/amd_bus.c
+++ b/arch/x86/pci/amd_bus.c
@@ -555,9 +555,11 @@ static int __init early_fill_mp_bus_info(void)
return 0;
}
-postcore_initcall(early_fill_mp_bus_info);
+#else /* !CONFIG_X86_64 */
-#endif
+static int __init early_fill_mp_bus_info(void) { return 0; }
+
+#endif /* !CONFIG_X86_64 */
/* common 32/64 bit code */
@@ -583,4 +585,15 @@ static int __init enable_pci_io_ecs(void)
return 0;
}
-postcore_initcall(enable_pci_io_ecs);
+static int __init amd_postcore_init(void)
+{
+ if (boot_cpu_data.x86_vendor != X86_VENDOR_AMD)
+ return 0;
+
+ early_fill_mp_bus_info();
+ enable_pci_io_ecs();
+
+ return 0;
+}
+
+postcore_initcall(amd_postcore_init);
--
2.39.5