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Commit 87e7dc97 authored by K. Y. Srinivasan's avatar K. Y. Srinivasan Committed by Greg Kroah-Hartman
Browse files

PCI: hv: Specify CPU_AFFINITY_ALL for MSI affinity when >= 32 CPUs 



commit 433fcf6b7b31f1f233dd50aeb9d066a0f6ed4b9d upstream.

When we have 32 or more CPUs in the affinity mask, we should use a special
constant to specify that to the host. Fix this issue.

Signed-off-by: default avatarK. Y. Srinivasan <kys@microsoft.com>
Signed-off-by: default avatarBjorn Helgaas <bhelgaas@google.com>
Reviewed-by: default avatarLong Li <longli@microsoft.com>
Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
parent d1d63f97

drivers/pci/host/pci-hyperv.c

+8 −3
Original line number Diff line number Diff line
@@ -72,6 +72,7 @@ enum { 
	PCI_PROTOCOL_VERSION_CURRENT = PCI_PROTOCOL_VERSION_1_1

};



#define CPU_AFFINITY_ALL	-1ULL

#define PCI_CONFIG_MMIO_LENGTH	0x2000

#define CFG_PAGE_OFFSET 0x1000

#define CFG_PAGE_SIZE (PCI_CONFIG_MMIO_LENGTH - CFG_PAGE_OFFSET)
@@ -889,10 +890,14 @@ static void hv_compose_msi_msg(struct irq_data *data, struct msi_msg *msg) 
	 * processors because Hyper-V only supports 64 in a guest.

	 */

	affinity = irq_data_get_affinity_mask(data);

	if (cpumask_weight(affinity) >= 32) {

		int_pkt->int_desc.cpu_mask = CPU_AFFINITY_ALL;

	} else {

		for_each_cpu_and(cpu, affinity, cpu_online_mask) {

			int_pkt->int_desc.cpu_mask |=

				(1ULL << vmbus_cpu_number_to_vp_number(cpu));

		}

	}



	ret = vmbus_sendpacket(hpdev->hbus->hdev->channel, int_pkt,

			       sizeof(*int_pkt), (unsigned long)&ctxt.pkt,