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| author |   Wei Liu <wei.liu@kernel.org> | 2021-09-10 18:57:13 +0000 |
|---|---|---|
| committer | Wei Liu <wei.liu@kernel.org> | 2021-09-11 15:40:09 +0000 |
| commit | 7ad9bb9d0f357dcab5eb9a0f28d1c8983c48434c (patch) | |
| tree | b1f3f45b181933344d6cb23234ed21010935a7a6 /include/asm-generic/mshyperv.h | |
| parent | Drivers: hv: vmbus: Fix kernel crash upon unbinding a device from uio_hv_generic driver (diff) | |
| download | linux-dev-7ad9bb9d0f357dcab5eb9a0f28d1c8983c48434c.tar.xz linux-dev-7ad9bb9d0f357dcab5eb9a0f28d1c8983c48434c.zip | |
asm-generic/hyperv: provide cpumask_to_vpset_noself
This is a new variant which removes `self' cpu from the vpset. It will
be used in Hyper-V enlightened IPI code.
Signed-off-by: Wei Liu <wei.liu@kernel.org>
Reviewed-by: Michael Kelley <mikelley@microsoft.com>
Link: https://lore.kernel.org/r/20210910185714.299411-2-wei.liu@kernel.org
Diffstat (limited to 'include/asm-generic/mshyperv.h')
| -rw-r--r-- | include/asm-generic/mshyperv.h | 21 |
1 files changed, 19 insertions, 2 deletions
diff --git a/include/asm-generic/mshyperv.h b/include/asm-generic/mshyperv.h index 9a000ba2bb75..9a134806f1d5 100644 --- a/include/asm-generic/mshyperv.h +++ b/include/asm-generic/mshyperv.h @@ -184,10 +184,12 @@ static inline int hv_cpu_number_to_vp_number(int cpu_number) return hv_vp_index[cpu_number]; } -static inline int cpumask_to_vpset(struct hv_vpset *vpset, - const struct cpumask *cpus) +static inline int __cpumask_to_vpset(struct hv_vpset *vpset, + const struct cpumask *cpus, + bool exclude_self) { int cpu, vcpu, vcpu_bank, vcpu_offset, nr_bank = 1; + int this_cpu = smp_processor_id(); /* valid_bank_mask can represent up to 64 banks */ if (hv_max_vp_index / 64 >= 64) @@ -205,6 +207,8 @@ static inline int cpumask_to_vpset(struct hv_vpset *vpset, * Some banks may end up being empty but this is acceptable. */ for_each_cpu(cpu, cpus) { + if (exclude_self && cpu == this_cpu) + continue; vcpu = hv_cpu_number_to_vp_number(cpu); if (vcpu == VP_INVAL) return -1; @@ -219,6 +223,19 @@ static inline int cpumask_to_vpset(struct hv_vpset *vpset, return nr_bank; } +static inline int cpumask_to_vpset(struct hv_vpset *vpset, + const struct cpumask *cpus) +{ + return __cpumask_to_vpset(vpset, cpus, false); +} + +static inline int cpumask_to_vpset_noself(struct hv_vpset *vpset, + const struct cpumask *cpus) +{ + WARN_ON_ONCE(preemptible()); + return __cpumask_to_vpset(vpset, cpus, true); +} + void hyperv_report_panic(struct pt_regs *regs, long err, bool in_die); bool hv_is_hyperv_initialized(void); bool hv_is_hibernation_supported(void); |