On 11/25/2014 01:24 PM, Borislav Petkov wrote:
On Tue, Nov 25, 2014 at 01:12:10PM -0500, Boris Ostrovsky wrote:
On 11/19/2014 03:52 PM, Greg Kroah-Hartman wrote:
3.17-stable review patch. If anyone has any objections, please let me know.
This breaks PV on Xen.
-boris
------------------
From: Borislav Petkov <b...@suse.de>
commit 85be07c32496dc264661308e4d9d4e9ccaff8072 upstream.
We should be accessing it through a pointer, like on the BSP.
Tested-by: Richard Hendershot <rshenders...@mchsi.com>
Fixes: 65cef1311d5d ("x86, microcode: Add a disable chicken bit")
Signed-off-by: Borislav Petkov <b...@suse.de>
Signed-off-by: Greg Kroah-Hartman <gre...@linuxfoundation.org>
---
arch/x86/kernel/cpu/microcode/core_early.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
--- a/arch/x86/kernel/cpu/microcode/core_early.c
+++ b/arch/x86/kernel/cpu/microcode/core_early.c
@@ -124,7 +124,7 @@ void __init load_ucode_bsp(void)
static bool check_loader_disabled_ap(void)
{
#ifdef CONFIG_X86_32
- return __pa_nodebug(dis_ucode_ldr);
+ return *((bool *)__pa_nodebug(&dis_ucode_ldr));
And practically the same line in check_loader_disabled_bsp() doesn't?
I don't think this routine is called on PV.
-boris
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