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| author | H. Peter Anvin <hpa@zytor.com> | 2008-01-30 13:33:02 +0100 |
|---|---|---|
| committer | Ingo Molnar <mingo@elte.hu> | 2008-01-30 13:33:02 +0100 |
| commit | 88089519f302f1296b4739be45699f06f728ec31 (patch) | |
| tree | a0ffb023be68d0b83503e77ba4a9d9b43acea88b /arch/x86/boot/pm.c | |
| parent | x86 setup: make PM transition more paranoid; cleanup 32-bit entry (diff) | |
| download | linux-88089519f302f1296b4739be45699f06f728ec31.tar.xz linux-88089519f302f1296b4739be45699f06f728ec31.zip | |
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.c | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/arch/x86/boot/pm.c b/arch/x86/boot/pm.c index 09fb342cc62e..b23cbdc7d547 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 |