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x86/xen: Calculate __max_logical_packages on PV domains 

The kernel panics on PV domains because native_smp_cpus_done() is
only called for HVM domains.

Calculate __max_logical_packages for PV domains.

Fixes: b4c0a7326f ("x86/smpboot: Fix __max_logical_packages estimate")
Signed-off-by: Prarit Bhargava <prarit@redhat.com>
Tested-and-reported-by: Simon Gaiser <simon@invisiblethingslab.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: "H. Peter Anvin" <hpa@zytor.com>
Cc: x86@kernel.org
Cc: Boris Ostrovsky <boris.ostrovsky@oracle.com>
Cc: Juergen Gross <jgross@suse.com>
Cc: Dou Liyang <douly.fnst@cn.fujitsu.com>
Cc: Prarit Bhargava <prarit@redhat.com>
Cc: Kate Stewart <kstewart@linuxfoundation.org>
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Cc: Andy Lutomirski <luto@kernel.org>
Cc: Andi Kleen <ak@linux.intel.com>
Cc: Vitaly Kuznetsov <vkuznets@redhat.com>
Cc: xen-devel@lists.xenproject.org
Reviewed-by: Boris Ostrovsky <boris.ostrovsky@oracle.com>
Signed-off-by: Juergen Gross <jgross@suse.com>
This commit is contained in:
Prarit Bhargava 2018-02-07 18:49:23 -05:00 committed by Juergen Gross
parent 29fee6eed2
commit 63e708f826
3 changed files with 11 additions and 2 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

1
arch/x86/include/asm/smp.h
View File

@ -129,6 +129,7 @@ static inline void arch_send_call_function_ipi_mask(const struct cpumask *mask)
void cpu_disable_common(void);
void native_smp_prepare_boot_cpu(void);
void native_smp_prepare_cpus(unsigned int max_cpus);
void calculate_max_logical_packages(void);
void native_smp_cpus_done(unsigned int max_cpus);
void common_cpu_up(unsigned int cpunum, struct task_struct *tidle);
int native_cpu_up(unsigned int cpunum, struct task_struct *tidle);

10
arch/x86/kernel/smpboot.c
View File

@ -1281,11 +1281,10 @@ void __init native_smp_prepare_boot_cpu(void)
cpu_set_state_online(me);
}
void __init native_smp_cpus_done(unsigned int max_cpus)
void __init calculate_max_logical_packages(void)
{
int ncpus;
pr_debug("Boot done\n");
/*
* Today neither Intel nor AMD support heterogenous systems so
* extrapolate the boot cpu's data to all packages.
@ -1293,6 +1292,13 @@ void __init native_smp_cpus_done(unsigned int max_cpus)
ncpus = cpu_data(0).booted_cores * topology_max_smt_threads();
__max_logical_packages = DIV_ROUND_UP(nr_cpu_ids, ncpus);
pr_info("Max logical packages: %u\n", __max_logical_packages);
}
void __init native_smp_cpus_done(unsigned int max_cpus)
{
pr_debug("Boot done\n");
calculate_max_logical_packages();
if (x86_has_numa_in_package)
set_sched_topology(x86_numa_in_package_topology);

2
arch/x86/xen/smp.c
View File

@ -122,6 +122,8 @@ void __init xen_smp_cpus_done(unsigned int max_cpus)
if (xen_hvm_domain())
native_smp_cpus_done(max_cpus);
else
calculate_max_logical_packages();
if (xen_have_vcpu_info_placement)
return;