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authorH. Peter Anvin <hpa@zytor.com>2008-01-30 13:33:02 +0100
committerIngo Molnar <mingo@elte.hu>2008-01-30 13:33:02 +0100
commit88089519f302f1296b4739be45699f06f728ec31 (patch)
treea0ffb023be68d0b83503e77ba4a9d9b43acea88b /arch/x86/boot/pm.c
parentc4d9ba6da9f050ebb7e0d70769e3dca0fd45334f (diff)
x86 setup: initialize LDTR and TR to make life easier to Intel VT
Intel VT doesn't like to engage when the protected-mode state isn't fully initialized. Make life easier for it by initializing LDTR (to null) and TR (to a dummy hunk of low memory which will never actually be touched.) Signed-off-by: H. Peter Anvin <hpa@zytor.com> Signed-off-by: Ingo Molnar <mingo@elte.hu> Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Diffstat (limited to 'arch/x86/boot/pm.c')
-rw-r--r--arch/x86/boot/pm.c4
1 files changed, 4 insertions, 0 deletions
diff --git a/arch/x86/boot/pm.c b/arch/x86/boot/pm.c
index 09fb342cc62..b23cbdc7d54 100644
--- a/arch/x86/boot/pm.c
+++ b/arch/x86/boot/pm.c
@@ -121,6 +121,10 @@ static void setup_gdt(void)
[GDT_ENTRY_BOOT_CS] = GDT_ENTRY(0xc09b, 0, 0xfffff),
/* DS: data, read/write, 4 GB, base 0 */
[GDT_ENTRY_BOOT_DS] = GDT_ENTRY(0xc093, 0, 0xfffff),
+ /* TSS: 32-bit tss, 104 bytes, base 4096 */
+ /* We only have a TSS here to keep Intel VT happy;
+ we don't actually use it for anything. */
+ [GDT_ENTRY_BOOT_TSS] = GDT_ENTRY(0x0089, 4096, 103),
};
/* Xen HVM incorrectly stores a pointer to the gdt_ptr, instead
of the gdt_ptr contents. Thus, make it static so it will