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Ian Campbell e68266b700 x86: xen: 64-bit kernel RPL should be 0 ... Under Xen 64 bit guests actually run their kernel in ring 3, however the hypervisor takes care of squashing descriptor the RPLs transparently (in order to allow them to continue to differentiate between user and kernel space CS using the RPL). Therefore the Xen paravirt backend should use RPL==0 instead of 1 (or 3). Using RPL==1 causes generic arch code to take incorrect code paths because it uses "testl $3, <CS>, je foo" type tests for a userspace CS and this considers 1==userspace. This issue was previously masked because get_kernel_rpl() was omitted when setting CS in kernel_thread(). This was fixed when kernel_thread() was unified with 32 bit in f443ff4201. Signed-off-by: Ian Campbell <ian.campbell@citrix.com> Cc: Christian Kujau <lists@nerdbynature.de> Cc: Jeremy Fitzhardinge <Jeremy.Fitzhardinge@citrix.com> Cc: Cyrill Gorcunov <gorcunov@gmail.com> Cc: Brian Gerst <brgerst@gmail.com> LKML-Reference: <1263377768-19600-2-git-send-email-ian.campbell@citrix.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>		15 years ago
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Kconfig	x86: remove the Voyager 32-bit subarch	16 years ago
Makefile	xen: make -fstack-protector work under Xen	16 years ago
debugfs.c	const: constify remaining file_operations	16 years ago
debugfs.h	…
enlighten.c	x86: xen: 64-bit kernel RPL should be 0	15 years ago
grant-table.c	…
irq.c	x86: Move irq_init to x86_init_ops	16 years ago
mmu.c	xen: correctly restore pfn_to_mfn_list_list after resume	15 years ago
mmu.h	x86: Move paravirt pagetable_setup to x86_init_ops	16 years ago
multicalls.c	x86, xen: do multicall callbacks with interrupts disabled	16 years ago
multicalls.h	…
setup.c	xen: reserve Xen start_info rather than e820 reserving	16 years ago
smp.c	Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/percpu	15 years ago
spinlock.c	locking: Convert raw_spinlock to arch_spinlock	15 years ago
suspend.c	xen: call clock resume notifier on all CPUs	15 years ago
time.c	Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/percpu	15 years ago
vdso.h	…
xen-asm.S	…
xen-asm.h	…
xen-asm_32.S	…
xen-asm_64.S	xen: use iret for return from 64b kernel to 32b usermode	15 years ago
xen-head.S	x86: use _types.h headers in asm where available	16 years ago
xen-ops.h	xen: correctly restore pfn_to_mfn_list_list after resume	15 years ago