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6aaf5d633b
linux/arch/x86/xen
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Jeremy Fitzhardinge 6aaf5d633b xen: use iret for return from 64b kernel to 32b usermode 
If Xen wants to return to a 32b usermode with sysret it must use the
right form.  When using VCGF_in_syscall to trigger this, it looks at
the code segment and does a 32b sysret if it is FLAT_USER_CS32.
However, this is different from __USER32_CS, so it fails to return
properly if we use the normal Linux segment.

So avoid the whole mess by dropping VCGF_in_syscall and simply use
plain iret to return to usermode.

Signed-off-by: Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com>
Acked-by: Jan Beulich <jbeulich@novell.com>
Cc: Stable Kernel <stable@kernel.org>
2009-12-03 11:14:54 -08:00
..
debugfs.c const: constify remaining file_operations 2009-10-01 16:11:11 -07:00
debugfs.h xen: add debugfs support 2008-08-21 13:52:58 +02:00
enlighten.c xen: register runstate info for boot CPU early 2009-12-03 11:14:53 -08:00
grant-table.c
irq.c x86: Move irq_init to x86_init_ops 2009-08-31 09:35:45 +02:00
Kconfig x86: remove the Voyager 32-bit subarch 2009-02-23 00:54:01 +01:00
Makefile xen: make -fstack-protector work under Xen 2009-09-09 16:37:39 -07:00
mmu.c xen: correctly restore pfn_to_mfn_list_list after resume 2009-12-03 11:14:51 -08:00
mmu.h x86: Move paravirt pagetable_setup to x86_init_ops 2009-08-31 09:35:45 +02:00
multicalls.c x86, xen: do multicall callbacks with interrupts disabled 2009-02-16 08:56:41 +01:00
multicalls.h Merge commit 'v2.6.29-rc4' into core/percpu 2009-02-09 14:58:11 +01:00
setup.c xen: reserve Xen start_info rather than e820 reserving 2009-05-08 10:51:03 +02:00
smp.c xen: register runstate on secondary CPUs 2009-12-03 11:14:52 -08:00
spinlock.c xen: use stronger barrier after unlocking lock 2009-09-09 16:38:44 -07:00
suspend.c xen: correctly restore pfn_to_mfn_list_list after resume 2009-12-03 11:14:51 -08:00
time.c xen: register timer interrupt with IRQF_TIMER 2009-12-03 11:14:52 -08:00
vdso.h
xen-asm_32.S x86: style cleanups for xen assemblies 2009-02-05 20:25:41 +01:00
xen-asm_64.S xen: use iret for return from 64b kernel to 32b usermode 2009-12-03 11:14:54 -08:00
xen-asm.h xen: make direct versions of irq_enable/disable/save/restore to common code 2009-02-04 16:59:04 -08:00
xen-asm.S x86: style cleanups for xen assemblies 2009-02-05 20:25:41 +01:00
xen-head.S x86: use _types.h headers in asm where available 2009-02-13 11:35:01 -08:00
xen-ops.h xen: correctly restore pfn_to_mfn_list_list after resume 2009-12-03 11:14:51 -08:00