#ifndef STR_H #define STR_H #include "built_in.h" extern size_t strlcpy(char *dest, const char *src, size_t size); extern int slprintf(char *dst, size_t size, const char *fmt, ...) __check_format_printf(3, 4); extern int slprintf_nocheck(char *dst, size_t size, const char *fmt, ...); extern char *strtrim_right(char *p, char c); extern noinline void *xmemset(void *s, int c, size_t n); extern char *argv2str(int startind, int argc, char **argv); #endif /* STR_H */ ' href='http:///git.distanz.ch/cgit.cgi/linux/net-next.git' title='net-next.git Git repository'/>
summaryrefslogtreecommitdiff
diff options
context:
space:
mode:
authorVitaly Kuznetsov <vkuznets@redhat.com>2016-09-08 11:48:28 +0200
committerDavid Vrabel <david.vrabel@citrix.com>2016-09-14 14:39:13 +0100
commitde75abbe0121a6c3c9c6b04c75300088e57ad1d5 (patch)
treedef35bbb8678c3d1820fd730d73ae440c753057b
parent55467dea2967259f21f4f854fc99d39cc5fea60e (diff)
arm/xen: fix SMP guests boot
Commit 88e957d6e47f ("xen: introduce xen_vcpu_id mapping") broke SMP ARM guests on Xen. When FIFO-based event channels are in use (this is the default), evtchn_fifo_alloc_control_block() is called on CPU_UP_PREPARE event and this happens before we set up xen_vcpu_id mapping in xen_starting_cpu. Temporary fix the issue by setting direct Linux CPU id <-> Xen vCPU id mapping for all possible CPUs at boot. We don't currently support kexec/kdump on Xen/ARM so these ids always match. In future, we have several ways to solve the issue, e.g.: - Eliminate all hypercalls from CPU_UP_PREPARE, do them from the starting CPU. This can probably be done for both x86 and ARM and, if done, will allow us to get Xen's idea of vCPU id from CPUID/MPIDR on the starting CPU directly, no messing with ACPI/device tree required. - Save vCPU id information from ACPI/device tree on ARM and use it to initialize xen_vcpu_id mapping. This is the same trick we currently do on x86. Reported-by: Julien Grall <julien.grall@arm.com> Tested-by: Wei Chen <Wei.Chen@arm.com> Signed-off-by: Vitaly Kuznetsov <vkuznets@redhat.com> Acked-by: Stefano Stabellini <sstabellini@kernel.org> Signed-off-by: David Vrabel <david.vrabel@citrix.com>
Diffstat