diff options
| author | Praveen Kumar <kumarpraveen@linux.microsoft.com> | 2021-05-31 13:10:46 +0530 |
|---|---|---|
| committer | Wei Liu <wei.liu@kernel.org> | 2021-06-02 15:13:20 +0000 |
| commit | 450605c28d571eddca39a65fdbc1338add44c6d9 (patch) | |
| tree | f0519d7221dcc656dac9e26242a50ce769b23676 | |
| parent | c6a8625fa4c6b0a97860d053271660ccedc3d1b3 (diff) | |
| download | linux-450605c28d571eddca39a65fdbc1338add44c6d9.tar.bz2 | |
x86/hyperv: fix logical processor creation
Microsoft Hypervisor expects the logical processor index to be the same
as CPU's index during logical processor creation. Using cpu_physical_id
confuses hypervisor's scheduler. That causes the root partition not boot
when core scheduler is used.
This patch removes the call to cpu_physical_id and uses the CPU index
directly for bringing up logical processor. This scheme works for both
classic scheduler and core scheduler.
Fixes: 333abaf5abb3 (x86/hyperv: implement and use hv_smp_prepare_cpus)
Signed-off-by: Praveen Kumar <kumarpraveen@linux.microsoft.com>
Link: https://lore.kernel.org/r/20210531074046.113452-1-kumarpraveen@linux.microsoft.com
Signed-off-by: Wei Liu <wei.liu@kernel.org>
| -rw-r--r-- | arch/x86/kernel/cpu/mshyperv.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/arch/x86/kernel/cpu/mshyperv.c b/arch/x86/kernel/cpu/mshyperv.c index 22f13343b5da..4fa0a4280895 100644 --- a/arch/x86/kernel/cpu/mshyperv.c +++ b/arch/x86/kernel/cpu/mshyperv.c @@ -236,7 +236,7 @@ static void __init hv_smp_prepare_cpus(unsigned int max_cpus) for_each_present_cpu(i) { if (i == 0) continue; - ret = hv_call_add_logical_proc(numa_cpu_node(i), i, cpu_physical_id(i)); + ret = hv_call_add_logical_proc(numa_cpu_node(i), i, i); BUG_ON(ret); } |