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PCI: hv: Temporary own CPU-number-to-vCPU-number infra 

To ease parallel effort to centralize CPU-number-to-vCPU-number conversion,
temporarily stand up own version, file-local hv_tmp_cpu_nr_to_vp_nr().
Once the changes have merged, this work-around can be removed, and the
calls replaced with hv_cpu_number_to_vp_number().

Signed-off-by: Jork Loeser <jloeser@microsoft.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Reviewed-by: K. Y. Srinivasan <kys@microsoft.com>
Acked-by: K. Y. Srinivasan <kys@microsoft.com>
This commit is contained in:
Jork Loeser 2017-05-24 13:41:26 -07:00 committed by Bjorn Helgaas
parent be66b67365
commit 02c3764c77
1 changed files with 50 additions and 2 deletions
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52
drivers/pci/host/pci-hyperv.c
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@ -479,6 +479,52 @@ static void put_pcichild(struct hv_pci_dev *hv_pcidev,
static void get_hvpcibus(struct hv_pcibus_device *hv_pcibus);
static void put_hvpcibus(struct hv_pcibus_device *hv_pcibus);
/*
* Temporary CPU to vCPU mapping to address transitioning
* vmbus_cpu_number_to_vp_number() being migrated to
* hv_cpu_number_to_vp_number() in a separate patch. Once that patch
* has been picked up in the main line, remove this code here and use
* the official code.
*/
static struct hv_tmpcpumap
{
bool initialized;
u32 vp_index[NR_CPUS];
} hv_tmpcpumap;
static void hv_tmpcpumap_init_cpu(void *_unused)
{
int cpu = smp_processor_id();
u64 vp_index;
hv_get_vp_index(vp_index);
hv_tmpcpumap.vp_index[cpu] = vp_index;
}
static void hv_tmpcpumap_init(void)
{
if (hv_tmpcpumap.initialized)
return;
memset(hv_tmpcpumap.vp_index, -1, sizeof(hv_tmpcpumap.vp_index));
on_each_cpu(hv_tmpcpumap_init_cpu, NULL, true);
hv_tmpcpumap.initialized = true;
}
/**
* hv_tmp_cpu_nr_to_vp_nr() - Convert Linux CPU nr to Hyper-V vCPU nr
*
* Remove once vmbus_cpu_number_to_vp_number() has been converted to
* hv_cpu_number_to_vp_number() and replace callers appropriately.
*/
static u32 hv_tmp_cpu_nr_to_vp_nr(int cpu)
{
return hv_tmpcpumap.vp_index[cpu];
}
/**
* devfn_to_wslot() - Convert from Linux PCI slot to Windows
* @devfn: The Linux representation of PCI slot
@ -813,7 +859,7 @@ static void hv_irq_unmask(struct irq_data *data)
params->vector = cfg->vector;
for_each_cpu_and(cpu, dest, cpu_online_mask)
params->vp_mask |= (1ULL << vmbus_cpu_number_to_vp_number(cpu));
params->vp_mask |= (1ULL << hv_tmp_cpu_nr_to_vp_nr(cpu));
hv_do_hypercall(HVCALL_RETARGET_INTERRUPT, params, NULL);
@ -908,7 +954,7 @@ static void hv_compose_msi_msg(struct irq_data *data, struct msi_msg *msg)
} else {
for_each_cpu_and(cpu, affinity, cpu_online_mask) {
int_pkt->int_desc.cpu_mask |=
(1ULL << vmbus_cpu_number_to_vp_number(cpu));
(1ULL << hv_tmp_cpu_nr_to_vp_nr(cpu));
}
}
@ -2218,6 +2264,8 @@ static int hv_pci_probe(struct hv_device *hdev,
return -ENOMEM;
hbus->state = hv_pcibus_init;
hv_tmpcpumap_init();
/*
* The PCI bus "domain" is what is called "segment" in ACPI and
* other specs. Pull it from the instance ID, to get something