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hyperv-fixes for 5.15

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Merge tag 'hyperv-fixes-signed-20211007' of git://git.kernel.org/pub/scm/linux/kernel/git/hyperv/linux

Pull hyperv fixes from Wei Liu:

 - Replace uuid.h with types.h in a header (Andy Shevchenko)

 - Avoid sleeping in atomic context in PCI driver (Long Li)

 - Avoid sending IPI to self when it shouldn't (Vitaly Kuznetsov)

* tag 'hyperv-fixes-signed-20211007' of git://git.kernel.org/pub/scm/linux/kernel/git/hyperv/linux:
  x86/hyperv: Avoid erroneously sending IPI to 'self'
  hyper-v: Replace uuid.h with types.h
  PCI: hv: Fix sleep while in non-sleep context when removing child devices from the bus
This commit is contained in:
Linus Torvalds 2021-10-07 09:44:48 -07:00
commit 52bf8031c0
3 changed files with 26 additions and 9 deletions
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20
arch/x86/hyperv/hv_apic.c
View File

@ -122,17 +122,27 @@ static bool __send_ipi_mask_ex(const struct cpumask *mask, int vector,
ipi_arg->reserved = 0;
ipi_arg->vp_set.valid_bank_mask = 0;
if (!cpumask_equal(mask, cpu_present_mask)) {
/*
* Use HV_GENERIC_SET_ALL and avoid converting cpumask to VP_SET
* when the IPI is sent to all currently present CPUs.
*/
if (!cpumask_equal(mask, cpu_present_mask) || exclude_self) {
ipi_arg->vp_set.format = HV_GENERIC_SET_SPARSE_4K;
if (exclude_self)
nr_bank = cpumask_to_vpset_noself(&(ipi_arg->vp_set), mask);
else
nr_bank = cpumask_to_vpset(&(ipi_arg->vp_set), mask);
}
if (nr_bank < 0)
goto ipi_mask_ex_done;
if (!nr_bank)
/*
* 'nr_bank <= 0' means some CPUs in cpumask can't be
* represented in VP_SET. Return an error and fall back to
* native (architectural) method of sending IPIs.
*/
if (nr_bank <= 0)
goto ipi_mask_ex_done;
} else {
ipi_arg->vp_set.format = HV_GENERIC_SET_ALL;
}
status = hv_do_rep_hypercall(HVCALL_SEND_IPI_EX, 0, nr_bank,
ipi_arg, NULL);

13
drivers/pci/controller/pci-hyperv.c
View File

@ -3301,9 +3301,17 @@ static int hv_pci_bus_exit(struct hv_device *hdev, bool keep_devs)
return 0;
if (!keep_devs) {
/* Delete any children which might still exist. */
struct list_head removed;
/* Move all present children to the list on stack */
INIT_LIST_HEAD(&removed);
spin_lock_irqsave(&hbus->device_list_lock, flags);
list_for_each_entry_safe(hpdev, tmp, &hbus->children, list_entry) {
list_for_each_entry_safe(hpdev, tmp, &hbus->children, list_entry)
list_move_tail(&hpdev->list_entry, &removed);
spin_unlock_irqrestore(&hbus->device_list_lock, flags);
/* Remove all children in the list */
list_for_each_entry_safe(hpdev, tmp, &removed, list_entry) {
list_del(&hpdev->list_entry);
if (hpdev->pci_slot)
pci_destroy_slot(hpdev->pci_slot);
@ -3311,7 +3319,6 @@ static int hv_pci_bus_exit(struct hv_device *hdev, bool keep_devs)
put_pcichild(hpdev);
put_pcichild(hpdev);
}
spin_unlock_irqrestore(&hbus->device_list_lock, flags);
}
ret = hv_send_resources_released(hdev);

2
include/uapi/linux/hyperv.h
View File

@ -26,7 +26,7 @@
#ifndef _UAPI_HYPERV_H
#define _UAPI_HYPERV_H
#include <linux/uuid.h>
#include <linux/types.h>
/*
* Framework version for util services.