From 88089519f302f1296b4739be45699f06f728ec31 Mon Sep 17 00:00:00 2001 From: "H. Peter Anvin" Date: Wed, 30 Jan 2008 13:33:02 +0100 Subject: 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 Signed-off-by: Ingo Molnar Signed-off-by: Thomas Gleixner --- arch/x86/boot/pm.c | 4 ++++ 1 file changed, 4 insertions(+) (limited to 'arch/x86/boot/pm.c') diff --git a/arch/x86/boot/pm.c b/arch/x86/boot/pm.c index 09fb342..b23cbdc7 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 -- cgit v1.1