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author | Russell King <rmk+kernel@armlinux.org.uk> | 2017-09-09 16:34:41 +0100 |
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committer | Russell King <rmk+kernel@armlinux.org.uk> | 2017-09-09 16:34:41 +0100 |
commit | e558bdc21ae1f0db520eccd84015e17d8a589973 (patch) | |
tree | b436123bd52f267b8c7f361618cded3e1e4421ea /arch/x86/xen/smp.c | |
parent | 746a272e44141af24a02f6c9b0f65f4c4598ed42 (diff) | |
parent | 9a3dc3186fc3795e076a4122da9e0258651a9631 (diff) | |
download | op-kernel-dev-e558bdc21ae1f0db520eccd84015e17d8a589973.zip op-kernel-dev-e558bdc21ae1f0db520eccd84015e17d8a589973.tar.gz |
Merge branches 'fixes' and 'misc' into for-linus
Diffstat (limited to 'arch/x86/xen/smp.c')
-rw-r--r-- | arch/x86/xen/smp.c | 31 |
1 files changed, 31 insertions, 0 deletions
diff --git a/arch/x86/xen/smp.c b/arch/x86/xen/smp.c index 82ac611..e7f02eb 100644 --- a/arch/x86/xen/smp.c +++ b/arch/x86/xen/smp.c @@ -1,4 +1,5 @@ #include <linux/smp.h> +#include <linux/cpu.h> #include <linux/slab.h> #include <linux/cpumask.h> #include <linux/percpu.h> @@ -114,6 +115,36 @@ int xen_smp_intr_init(unsigned int cpu) return rc; } +void __init xen_smp_cpus_done(unsigned int max_cpus) +{ + int cpu, rc, count = 0; + + if (xen_hvm_domain()) + native_smp_cpus_done(max_cpus); + + if (xen_have_vcpu_info_placement) + return; + + for_each_online_cpu(cpu) { + if (xen_vcpu_nr(cpu) < MAX_VIRT_CPUS) + continue; + + rc = cpu_down(cpu); + + if (rc == 0) { + /* + * Reset vcpu_info so this cpu cannot be onlined again. + */ + xen_vcpu_info_reset(cpu); + count++; + } else { + pr_warn("%s: failed to bring CPU %d down, error %d\n", + __func__, cpu, rc); + } + } + WARN(count, "%s: brought %d CPUs offline\n", __func__, count); +} + void xen_smp_send_reschedule(int cpu) { xen_send_IPI_one(cpu, XEN_RESCHEDULE_VECTOR); |