Konrad Rzeszutek Wilk 26a7999527 xen/smp: Update pv_lock_ops functions before alternative code starts under PVHVM ... Before this patch we would patch all of the pv_lock_ops sites using alternative assembler. Then later in the bootup cycle change the unlock_kick and lock_spinning to the Xen specific - without re patching. That meant that for the core of the kernel we would be running with the baremetal version of unlock_kick and lock_spinning while for modules we would have the proper Xen specific slowpaths. As most of the module uses some API from the core kernel that ended up with slowpath lockers waiting forever to be kicked (b/c they would be using the Xen specific slowpath logic). And the kick never came b/c the unlock path that was taken was the baremetal one. On PV we do not have the problem as we initialise before the alternative code kicks in. The fix is to make the updating of the pv_lock_ops function be done before the alternative code starts patching. Note that this patch fixes issues discovered by commit f10cd522c5. ("xen: disable PV spinlocks on HVM") wherein it mentioned PV spinlocks cannot possibly work with the current code because they are enabled after pvops patching has already been done, and because PV spinlocks use a different data structure than native spinlocks so we cannot switch between them dynamically. The first problem is solved by this patch. The second problem has been solved by commit 816434ec4a (Merge branch 'x86-spinlocks-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip) P.S. There is still the commit 70dd4998cb (xen/spinlock: Disable IRQ spinlock (PV) allocation on PVHVM) to revert but that can be done later after all other bugs have been fixed. Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com> Reviewed-by: David Vrabel <david.vrabel@citrix.com>		2013-09-09 12:06:31 -04:00
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apic.c	xen/apic/xenbus/swiotlb/pcifront/grant/tmem: Make functions or variables static.	2012-08-21 14:50:03 -04:00
debugfs.c	debugfs: Add support to print u32 array in debugfs	2012-04-17 00:18:36 -04:00
debugfs.h	debugfs: Add support to print u32 array in debugfs	2012-04-17 00:18:36 -04:00
enlighten.c	xen/spinlock: Fix locking path engaging too soon under PVHVM.	2013-09-09 12:06:16 -04:00
grant-table.c	Merge commit 'v3.2-rc3' into stable/for-linus-3.3	2011-12-20 17:01:18 -05:00
irq.c	x86/xen: disable premption when enabling local irqs	2013-08-20 10:02:03 -04:00
Kconfig	x86: Make Linux guest support optional	2013-03-04 13:14:25 -08:00
Makefile	xen/x86: Implement x86_apic_ops	2012-05-01 14:50:33 -04:00
mmu.c	Merge branch 'x86-kaslr-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip	2013-04-30 08:37:24 -07:00
mmu.h	xen: make a pile of mmu pvop functions static	2011-05-20 14:25:24 -07:00
multicalls.c	xen/multicall: move *idx fields to start of mc_buffer	2011-07-18 15:43:46 -07:00
multicalls.h	xen: use this_cpu_xxx replace percpu_xxx funcs	2012-01-24 12:20:24 -05:00
p2m.c	xen/p2m: Don't call get_balloon_scratch_page() twice, keep interrupts disabled for multicalls	2013-09-09 10:50:52 +00:00
pci-swiotlb-xen.c	Merge branch 'stable/late-swiotlb.v3.3' into stable/for-linus-3.7	2012-09-22 20:01:24 -04:00
platform-pci-unplug.c	xen/apic/xenbus/swiotlb/pcifront/grant/tmem: Make functions or variables static.	2012-08-21 14:50:03 -04:00
setup.c	Linux 3.11-rc7	2013-09-09 12:05:37 -04:00
smp.c	xen/smp: Update pv_lock_ops functions before alternative code starts under PVHVM	2013-09-09 12:06:31 -04:00
smp.h	xen: Clean up apic ipi interface	2013-05-29 09:04:21 -04:00
spinlock.c	xen/spinlock: We don't need the old structure anymore	2013-09-09 12:06:24 -04:00
suspend.c	Revert "xen PVonHVM: use E820_Reserved area for shared_info"	2013-02-14 21:29:31 -05:00
time.c	Merge branch 'timers-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip	2013-07-06 14:09:38 -07:00
trace.c	xen/trace: Fix compile error when CONFIG_XEN_PRIVILEGED_GUEST is not set	2011-08-05 09:43:02 -04:00
vdso.h
vga.c	xen/vga: add the xen EFI video mode support	2012-09-24 09:28:57 -04:00
xen-asm_32.S	x86/xen: don't assume %ds is usable in xen_iret for 32-bit PVOPS.	2013-02-13 15:40:30 -05:00
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-asm.S	xen: correctly check for pending events when restoring irq flags	2012-04-27 16:04:21 -04:00
xen-head.S	xen/perf: Define .glob for the different hypercalls.	2012-07-30 14:27:48 -04:00
xen-ops.h	x86: delete __cpuinit usage from all x86 files	2013-07-14 19:36:56 -04:00