Commit 7ad9bb9d authored by Wei Liu's avatar Wei Liu
Browse files

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: default avatarWei Liu <wei.liu@kernel.org>
Reviewed-by: default avatarMichael Kelley <mikelley@microsoft.com>
Link: https://lore.kernel.org/r/20210910185714.299411-2-wei.liu@kernel.org
parent f1940d4e

include/asm-generic/mshyperv.h

+19 −2
Original line number Diff line number Diff line
@@ -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);