summaryrefslogtreecommitdiffstats
path: root/drivers/pci
diff options
context:
space:
mode:
authorBjorn Helgaas <bhelgaas@google.com>2017-07-03 08:00:31 -0500
committerBjorn Helgaas <bhelgaas@google.com>2017-07-03 08:00:31 -0500
commit85e4b30a2c6f40f25bad2226840dc98ec2854603 (patch)
treed2761a09740d18fad40553adec6c395c3d38e7b9 /drivers/pci
parent6f65daed5bcca6d4e419c0b914f392c7fdb48027 (diff)
parent7dcf90e9e032432e91ce77dd872d2227e9d5b741 (diff)
downloadlinux-85e4b30a2c6f40f25bad2226840dc98ec2854603.tar.bz2
Merge branch 'pci/host-hv' into next
* pci/host-hv: PCI: hv: Use vPCI protocol version 1.2 PCI: hv: Add vPCI version protocol negotiation PCI: hv: Temporary own CPU-number-to-vCPU-number infra PCI: hv: Use page allocation for hbus structure PCI: hv: Fix comment formatting and use proper integer fields
Diffstat (limited to 'drivers/pci')
-rw-r--r--drivers/pci/host/pci-hyperv.c445
1 files changed, 364 insertions, 81 deletions
diff --git a/drivers/pci/host/pci-hyperv.c b/drivers/pci/host/pci-hyperv.c
index 84936383e269..415dcc69a502 100644
--- a/drivers/pci/host/pci-hyperv.c
+++ b/drivers/pci/host/pci-hyperv.c
@@ -64,22 +64,39 @@
* major version.
*/
-#define PCI_MAKE_VERSION(major, minor) ((u32)(((major) << 16) | (major)))
+#define PCI_MAKE_VERSION(major, minor) ((u32)(((major) << 16) | (minor)))
#define PCI_MAJOR_VERSION(version) ((u32)(version) >> 16)
#define PCI_MINOR_VERSION(version) ((u32)(version) & 0xff)
-enum {
- PCI_PROTOCOL_VERSION_1_1 = PCI_MAKE_VERSION(1, 1),
- PCI_PROTOCOL_VERSION_CURRENT = PCI_PROTOCOL_VERSION_1_1
+enum pci_protocol_version_t {
+ PCI_PROTOCOL_VERSION_1_1 = PCI_MAKE_VERSION(1, 1), /* Win10 */
+ PCI_PROTOCOL_VERSION_1_2 = PCI_MAKE_VERSION(1, 2), /* RS1 */
};
#define CPU_AFFINITY_ALL -1ULL
+
+/*
+ * Supported protocol versions in the order of probing - highest go
+ * first.
+ */
+static enum pci_protocol_version_t pci_protocol_versions[] = {
+ PCI_PROTOCOL_VERSION_1_2,
+ PCI_PROTOCOL_VERSION_1_1,
+};
+
+/*
+ * Protocol version negotiated by hv_pci_protocol_negotiation().
+ */
+static enum pci_protocol_version_t pci_protocol_version;
+
#define PCI_CONFIG_MMIO_LENGTH 0x2000
#define CFG_PAGE_OFFSET 0x1000
#define CFG_PAGE_SIZE (PCI_CONFIG_MMIO_LENGTH - CFG_PAGE_OFFSET)
#define MAX_SUPPORTED_MSI_MESSAGES 0x400
+#define STATUS_REVISION_MISMATCH 0xC0000059
+
/*
* Message Types
*/
@@ -109,6 +126,9 @@ enum pci_message_type {
PCI_QUERY_PROTOCOL_VERSION = PCI_MESSAGE_BASE + 0x13,
PCI_CREATE_INTERRUPT_MESSAGE = PCI_MESSAGE_BASE + 0x14,
PCI_DELETE_INTERRUPT_MESSAGE = PCI_MESSAGE_BASE + 0x15,
+ PCI_RESOURCES_ASSIGNED2 = PCI_MESSAGE_BASE + 0x16,
+ PCI_CREATE_INTERRUPT_MESSAGE2 = PCI_MESSAGE_BASE + 0x17,
+ PCI_DELETE_INTERRUPT_MESSAGE2 = PCI_MESSAGE_BASE + 0x18, /* unused */
PCI_MESSAGE_MAXIMUM
};
@@ -179,6 +199,30 @@ struct hv_msi_desc {
} __packed;
/**
+ * struct hv_msi_desc2 - 1.2 version of hv_msi_desc
+ * @vector: IDT entry
+ * @delivery_mode: As defined in Intel's Programmer's
+ * Reference Manual, Volume 3, Chapter 8.
+ * @vector_count: Number of contiguous entries in the
+ * Interrupt Descriptor Table that are
+ * occupied by this Message-Signaled
+ * Interrupt. For "MSI", as first defined
+ * in PCI 2.2, this can be between 1 and
+ * 32. For "MSI-X," as first defined in PCI
+ * 3.0, this must be 1, as each MSI-X table
+ * entry would have its own descriptor.
+ * @processor_count: number of bits enabled in array.
+ * @processor_array: All the target virtual processors.
+ */
+struct hv_msi_desc2 {
+ u8 vector;
+ u8 delivery_mode;
+ u16 vector_count;
+ u16 processor_count;
+ u16 processor_array[32];
+} __packed;
+
+/**
* struct tran_int_desc
* @reserved: unused, padding
* @vector_count: same as in hv_msi_desc
@@ -245,7 +289,7 @@ struct pci_packet {
struct pci_version_request {
struct pci_message message_type;
- enum pci_message_type protocol_version;
+ u32 protocol_version;
} __packed;
/*
@@ -294,6 +338,14 @@ struct pci_resources_assigned {
u32 reserved[4];
} __packed;
+struct pci_resources_assigned2 {
+ struct pci_message message_type;
+ union win_slot_encoding wslot;
+ u8 memory_range[0x14][6]; /* not used here */
+ u32 msi_descriptor_count;
+ u8 reserved[70];
+} __packed;
+
struct pci_create_interrupt {
struct pci_message message_type;
union win_slot_encoding wslot;
@@ -306,6 +358,12 @@ struct pci_create_int_response {
struct tran_int_desc int_desc;
} __packed;
+struct pci_create_interrupt2 {
+ struct pci_message message_type;
+ union win_slot_encoding wslot;
+ struct hv_msi_desc2 int_desc;
+} __packed;
+
struct pci_delete_interrupt {
struct pci_message message_type;
union win_slot_encoding wslot;
@@ -331,17 +389,42 @@ static int pci_ring_size = (4 * PAGE_SIZE);
#define HV_PARTITION_ID_SELF ((u64)-1)
#define HVCALL_RETARGET_INTERRUPT 0x7e
-struct retarget_msi_interrupt {
- u64 partition_id; /* use "self" */
- u64 device_id;
+struct hv_interrupt_entry {
u32 source; /* 1 for MSI(-X) */
u32 reserved1;
u32 address;
u32 data;
- u64 reserved2;
+};
+
+#define HV_VP_SET_BANK_COUNT_MAX 5 /* current implementation limit */
+
+struct hv_vp_set {
+ u64 format; /* 0 (HvGenericSetSparse4k) */
+ u64 valid_banks;
+ u64 masks[HV_VP_SET_BANK_COUNT_MAX];
+};
+
+/*
+ * flags for hv_device_interrupt_target.flags
+ */
+#define HV_DEVICE_INTERRUPT_TARGET_MULTICAST 1
+#define HV_DEVICE_INTERRUPT_TARGET_PROCESSOR_SET 2
+
+struct hv_device_interrupt_target {
u32 vector;
u32 flags;
- u64 vp_mask;
+ union {
+ u64 vp_mask;
+ struct hv_vp_set vp_set;
+ };
+};
+
+struct retarget_msi_interrupt {
+ u64 partition_id; /* use "self" */
+ u64 device_id;
+ struct hv_interrupt_entry int_entry;
+ u64 reserved2;
+ struct hv_device_interrupt_target int_target;
} __packed;
/*
@@ -382,7 +465,10 @@ struct hv_pcibus_device {
struct msi_domain_info msi_info;
struct msi_controller msi_chip;
struct irq_domain *irq_domain;
+
+ /* hypercall arg, must not cross page boundary */
struct retarget_msi_interrupt retarget_msi_interrupt_params;
+
spinlock_t retarget_msi_interrupt_lock;
};
@@ -476,6 +562,52 @@ 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
@@ -786,8 +918,11 @@ static void hv_irq_unmask(struct irq_data *data)
struct cpumask *dest;
struct pci_bus *pbus;
struct pci_dev *pdev;
- int cpu;
unsigned long flags;
+ u32 var_size = 0;
+ int cpu_vmbus;
+ int cpu;
+ u64 res;
dest = irq_data_get_affinity_mask(data);
pdev = msi_desc_to_pci_dev(msi_desc);
@@ -799,23 +934,74 @@ static void hv_irq_unmask(struct irq_data *data)
params = &hbus->retarget_msi_interrupt_params;
memset(params, 0, sizeof(*params));
params->partition_id = HV_PARTITION_ID_SELF;
- params->source = 1; /* MSI(-X) */
- params->address = msi_desc->msg.address_lo;
- params->data = msi_desc->msg.data;
+ params->int_entry.source = 1; /* MSI(-X) */
+ params->int_entry.address = msi_desc->msg.address_lo;
+ params->int_entry.data = msi_desc->msg.data;
params->device_id = (hbus->hdev->dev_instance.b[5] << 24) |
(hbus->hdev->dev_instance.b[4] << 16) |
(hbus->hdev->dev_instance.b[7] << 8) |
(hbus->hdev->dev_instance.b[6] & 0xf8) |
PCI_FUNC(pdev->devfn);
- params->vector = cfg->vector;
+ params->int_target.vector = cfg->vector;
+
+ /*
+ * Honoring apic->irq_delivery_mode set to dest_Fixed by
+ * setting the HV_DEVICE_INTERRUPT_TARGET_MULTICAST flag results in a
+ * spurious interrupt storm. Not doing so does not seem to have a
+ * negative effect (yet?).
+ */
+
+ if (pci_protocol_version >= PCI_PROTOCOL_VERSION_1_2) {
+ /*
+ * PCI_PROTOCOL_VERSION_1_2 supports the VP_SET version of the
+ * HVCALL_RETARGET_INTERRUPT hypercall, which also coincides
+ * with >64 VP support.
+ * ms_hyperv.hints & HV_X64_EX_PROCESSOR_MASKS_RECOMMENDED
+ * is not sufficient for this hypercall.
+ */
+ params->int_target.flags |=
+ HV_DEVICE_INTERRUPT_TARGET_PROCESSOR_SET;
+ params->int_target.vp_set.valid_banks =
+ (1ull << HV_VP_SET_BANK_COUNT_MAX) - 1;
+
+ /*
+ * var-sized hypercall, var-size starts after vp_mask (thus
+ * vp_set.format does not count, but vp_set.valid_banks does).
+ */
+ var_size = 1 + HV_VP_SET_BANK_COUNT_MAX;
- for_each_cpu_and(cpu, dest, cpu_online_mask)
- params->vp_mask |= (1ULL << vmbus_cpu_number_to_vp_number(cpu));
+ for_each_cpu_and(cpu, dest, cpu_online_mask) {
+ cpu_vmbus = hv_tmp_cpu_nr_to_vp_nr(cpu);
- hv_do_hypercall(HVCALL_RETARGET_INTERRUPT, params, NULL);
+ if (cpu_vmbus >= HV_VP_SET_BANK_COUNT_MAX * 64) {
+ dev_err(&hbus->hdev->device,
+ "too high CPU %d", cpu_vmbus);
+ res = 1;
+ goto exit_unlock;
+ }
+ params->int_target.vp_set.masks[cpu_vmbus / 64] |=
+ (1ULL << (cpu_vmbus & 63));
+ }
+ } else {
+ for_each_cpu_and(cpu, dest, cpu_online_mask) {
+ params->int_target.vp_mask |=
+ (1ULL << hv_tmp_cpu_nr_to_vp_nr(cpu));
+ }
+ }
+
+ res = hv_do_hypercall(HVCALL_RETARGET_INTERRUPT | (var_size << 17),
+ params, NULL);
+
+exit_unlock:
spin_unlock_irqrestore(&hbus->retarget_msi_interrupt_lock, flags);
+ if (res) {
+ dev_err(&hbus->hdev->device,
+ "%s() failed: %#llx", __func__, res);
+ return;
+ }
+
pci_msi_unmask_irq(data);
}
@@ -836,6 +1022,53 @@ static void hv_pci_compose_compl(void *context, struct pci_response *resp,
complete(&comp_pkt->comp_pkt.host_event);
}
+static u32 hv_compose_msi_req_v1(
+ struct pci_create_interrupt *int_pkt, struct cpumask *affinity,
+ u32 slot, u8 vector)
+{
+ int_pkt->message_type.type = PCI_CREATE_INTERRUPT_MESSAGE;
+ int_pkt->wslot.slot = slot;
+ int_pkt->int_desc.vector = vector;
+ int_pkt->int_desc.vector_count = 1;
+ int_pkt->int_desc.delivery_mode =
+ (apic->irq_delivery_mode == dest_LowestPrio) ?
+ dest_LowestPrio : dest_Fixed;
+
+ /*
+ * Create MSI w/ dummy vCPU set, overwritten by subsequent retarget in
+ * hv_irq_unmask().
+ */
+ int_pkt->int_desc.cpu_mask = CPU_AFFINITY_ALL;
+
+ return sizeof(*int_pkt);
+}
+
+static u32 hv_compose_msi_req_v2(
+ struct pci_create_interrupt2 *int_pkt, struct cpumask *affinity,
+ u32 slot, u8 vector)
+{
+ int cpu;
+
+ int_pkt->message_type.type = PCI_CREATE_INTERRUPT_MESSAGE2;
+ int_pkt->wslot.slot = slot;
+ int_pkt->int_desc.vector = vector;
+ int_pkt->int_desc.vector_count = 1;
+ int_pkt->int_desc.delivery_mode =
+ (apic->irq_delivery_mode == dest_LowestPrio) ?
+ dest_LowestPrio : dest_Fixed;
+
+ /*
+ * Create MSI w/ dummy vCPU set targeting just one vCPU, overwritten
+ * by subsequent retarget in hv_irq_unmask().
+ */
+ cpu = cpumask_first_and(affinity, cpu_online_mask);
+ int_pkt->int_desc.processor_array[0] =
+ hv_tmp_cpu_nr_to_vp_nr(cpu);
+ int_pkt->int_desc.processor_count = 1;
+
+ return sizeof(*int_pkt);
+}
+
/**
* hv_compose_msi_msg() - Supplies a valid MSI address/data
* @data: Everything about this MSI
@@ -854,15 +1087,17 @@ static void hv_compose_msi_msg(struct irq_data *data, struct msi_msg *msg)
struct hv_pci_dev *hpdev;
struct pci_bus *pbus;
struct pci_dev *pdev;
- struct pci_create_interrupt *int_pkt;
struct compose_comp_ctxt comp;
struct tran_int_desc *int_desc;
- struct cpumask *affinity;
struct {
- struct pci_packet pkt;
- u8 buffer[sizeof(struct pci_create_interrupt)];
- } ctxt;
- int cpu;
+ struct pci_packet pci_pkt;
+ union {
+ struct pci_create_interrupt v1;
+ struct pci_create_interrupt2 v2;
+ } int_pkts;
+ } __packed ctxt;
+
+ u32 size;
int ret;
pdev = msi_desc_to_pci_dev(irq_data_get_msi_desc(data));
@@ -885,36 +1120,44 @@ static void hv_compose_msi_msg(struct irq_data *data, struct msi_msg *msg)
memset(&ctxt, 0, sizeof(ctxt));
init_completion(&comp.comp_pkt.host_event);
- ctxt.pkt.completion_func = hv_pci_compose_compl;
- ctxt.pkt.compl_ctxt = &comp;
- int_pkt = (struct pci_create_interrupt *)&ctxt.pkt.message;
- int_pkt->message_type.type = PCI_CREATE_INTERRUPT_MESSAGE;
- int_pkt->wslot.slot = hpdev->desc.win_slot.slot;
- int_pkt->int_desc.vector = cfg->vector;
- int_pkt->int_desc.vector_count = 1;
- int_pkt->int_desc.delivery_mode =
- (apic->irq_delivery_mode == dest_LowestPrio) ? 1 : 0;
+ ctxt.pci_pkt.completion_func = hv_pci_compose_compl;
+ ctxt.pci_pkt.compl_ctxt = &comp;
+
+ switch (pci_protocol_version) {
+ case PCI_PROTOCOL_VERSION_1_1:
+ size = hv_compose_msi_req_v1(&ctxt.int_pkts.v1,
+ irq_data_get_affinity_mask(data),
+ hpdev->desc.win_slot.slot,
+ cfg->vector);
+ break;
- /*
- * This bit doesn't have to work on machines with more than 64
- * 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));
- }
+ case PCI_PROTOCOL_VERSION_1_2:
+ size = hv_compose_msi_req_v2(&ctxt.int_pkts.v2,
+ irq_data_get_affinity_mask(data),
+ hpdev->desc.win_slot.slot,
+ cfg->vector);
+ break;
+
+ default:
+ /* As we only negotiate protocol versions known to this driver,
+ * this path should never hit. However, this is it not a hot
+ * path so we print a message to aid future updates.
+ */
+ dev_err(&hbus->hdev->device,
+ "Unexpected vPCI protocol, update driver.");
+ goto free_int_desc;
}
- ret = vmbus_sendpacket(hpdev->hbus->hdev->channel, int_pkt,
- sizeof(*int_pkt), (unsigned long)&ctxt.pkt,
+ ret = vmbus_sendpacket(hpdev->hbus->hdev->channel, &ctxt.int_pkts,
+ size, (unsigned long)&ctxt.pci_pkt,
VM_PKT_DATA_INBAND,
VMBUS_DATA_PACKET_FLAG_COMPLETION_REQUESTED);
- if (ret)
+ if (ret) {
+ dev_err(&hbus->hdev->device,
+ "Sending request for interrupt failed: 0x%x",
+ comp.comp_pkt.completion_status);
goto free_int_desc;
+ }
wait_for_completion(&comp.comp_pkt.host_event);
@@ -1513,12 +1756,12 @@ static void pci_devices_present_work(struct work_struct *work)
put_pcichild(hpdev, hv_pcidev_ref_initial);
}
- switch(hbus->state) {
+ switch (hbus->state) {
case hv_pcibus_installed:
/*
- * Tell the core to rescan bus
- * because there may have been changes.
- */
+ * Tell the core to rescan bus
+ * because there may have been changes.
+ */
pci_lock_rescan_remove();
pci_scan_child_bus(hbus->pci_bus);
pci_unlock_rescan_remove();
@@ -1800,6 +2043,7 @@ static int hv_pci_protocol_negotiation(struct hv_device *hdev)
struct hv_pci_compl comp_pkt;
struct pci_packet *pkt;
int ret;
+ int i;
/*
* Initiate the handshake with the host and negotiate
@@ -1816,26 +2060,44 @@ static int hv_pci_protocol_negotiation(struct hv_device *hdev)
pkt->compl_ctxt = &comp_pkt;
version_req = (struct pci_version_request *)&pkt->message;
version_req->message_type.type = PCI_QUERY_PROTOCOL_VERSION;
- version_req->protocol_version = PCI_PROTOCOL_VERSION_CURRENT;
- ret = vmbus_sendpacket(hdev->channel, version_req,
- sizeof(struct pci_version_request),
- (unsigned long)pkt, VM_PKT_DATA_INBAND,
- VMBUS_DATA_PACKET_FLAG_COMPLETION_REQUESTED);
- if (ret)
- goto exit;
+ for (i = 0; i < ARRAY_SIZE(pci_protocol_versions); i++) {
+ version_req->protocol_version = pci_protocol_versions[i];
+ ret = vmbus_sendpacket(hdev->channel, version_req,
+ sizeof(struct pci_version_request),
+ (unsigned long)pkt, VM_PKT_DATA_INBAND,
+ VMBUS_DATA_PACKET_FLAG_COMPLETION_REQUESTED);
+ if (ret) {
+ dev_err(&hdev->device,
+ "PCI Pass-through VSP failed sending version reqquest: %#x",
+ ret);
+ goto exit;
+ }
- wait_for_completion(&comp_pkt.host_event);
+ wait_for_completion(&comp_pkt.host_event);
- if (comp_pkt.completion_status < 0) {
- dev_err(&hdev->device,
- "PCI Pass-through VSP failed version request %x\n",
- comp_pkt.completion_status);
- ret = -EPROTO;
- goto exit;
+ if (comp_pkt.completion_status >= 0) {
+ pci_protocol_version = pci_protocol_versions[i];
+ dev_info(&hdev->device,
+ "PCI VMBus probing: Using version %#x\n",
+ pci_protocol_version);
+ goto exit;
+ }
+
+ if (comp_pkt.completion_status != STATUS_REVISION_MISMATCH) {
+ dev_err(&hdev->device,
+ "PCI Pass-through VSP failed version request: %#x",
+ comp_pkt.completion_status);
+ ret = -EPROTO;
+ goto exit;
+ }
+
+ reinit_completion(&comp_pkt.host_event);
}
- ret = 0;
+ dev_err(&hdev->device,
+ "PCI pass-through VSP failed to find supported version");
+ ret = -EPROTO;
exit:
kfree(pkt);
@@ -2094,13 +2356,18 @@ static int hv_send_resources_allocated(struct hv_device *hdev)
{
struct hv_pcibus_device *hbus = hv_get_drvdata(hdev);
struct pci_resources_assigned *res_assigned;
+ struct pci_resources_assigned2 *res_assigned2;
struct hv_pci_compl comp_pkt;
struct hv_pci_dev *hpdev;
struct pci_packet *pkt;
+ size_t size_res;
u32 wslot;
int ret;
- pkt = kmalloc(sizeof(*pkt) + sizeof(*res_assigned), GFP_KERNEL);
+ size_res = (pci_protocol_version < PCI_PROTOCOL_VERSION_1_2)
+ ? sizeof(*res_assigned) : sizeof(*res_assigned2);
+
+ pkt = kmalloc(sizeof(*pkt) + size_res, GFP_KERNEL);
if (!pkt)
return -ENOMEM;
@@ -2111,22 +2378,30 @@ static int hv_send_resources_allocated(struct hv_device *hdev)
if (!hpdev)
continue;
- memset(pkt, 0, sizeof(*pkt) + sizeof(*res_assigned));
+ memset(pkt, 0, sizeof(*pkt) + size_res);
init_completion(&comp_pkt.host_event);
pkt->completion_func = hv_pci_generic_compl;
pkt->compl_ctxt = &comp_pkt;
- res_assigned = (struct pci_resources_assigned *)&pkt->message;
- res_assigned->message_type.type = PCI_RESOURCES_ASSIGNED;
- res_assigned->wslot.slot = hpdev->desc.win_slot.slot;
+ if (pci_protocol_version < PCI_PROTOCOL_VERSION_1_2) {
+ res_assigned =
+ (struct pci_resources_assigned *)&pkt->message;
+ res_assigned->message_type.type =
+ PCI_RESOURCES_ASSIGNED;
+ res_assigned->wslot.slot = hpdev->desc.win_slot.slot;
+ } else {
+ res_assigned2 =
+ (struct pci_resources_assigned2 *)&pkt->message;
+ res_assigned2->message_type.type =
+ PCI_RESOURCES_ASSIGNED2;
+ res_assigned2->wslot.slot = hpdev->desc.win_slot.slot;
+ }
put_pcichild(hpdev, hv_pcidev_ref_by_slot);
- ret = vmbus_sendpacket(
- hdev->channel, &pkt->message,
- sizeof(*res_assigned),
- (unsigned long)pkt,
- VM_PKT_DATA_INBAND,
- VMBUS_DATA_PACKET_FLAG_COMPLETION_REQUESTED);
+ ret = vmbus_sendpacket(hdev->channel, &pkt->message,
+ size_res, (unsigned long)pkt,
+ VM_PKT_DATA_INBAND,
+ VMBUS_DATA_PACKET_FLAG_COMPLETION_REQUESTED);
if (ret)
break;
@@ -2204,11 +2479,19 @@ static int hv_pci_probe(struct hv_device *hdev,
struct hv_pcibus_device *hbus;
int ret;
- hbus = kzalloc(sizeof(*hbus), GFP_KERNEL);
+ /*
+ * hv_pcibus_device contains the hypercall arguments for retargeting in
+ * hv_irq_unmask(). Those must not cross a page boundary.
+ */
+ BUILD_BUG_ON(sizeof(*hbus) > PAGE_SIZE);
+
+ hbus = (struct hv_pcibus_device *)get_zeroed_page(GFP_KERNEL);
if (!hbus)
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
@@ -2308,7 +2591,7 @@ free_config:
close:
vmbus_close(hdev->channel);
free_bus:
- kfree(hbus);
+ free_page((unsigned long)hbus);
return ret;
}
@@ -2386,7 +2669,7 @@ static int hv_pci_remove(struct hv_device *hdev)
irq_domain_free_fwnode(hbus->sysdata.fwnode);
put_hvpcibus(hbus);
wait_for_completion(&hbus->remove_event);
- kfree(hbus);
+ free_page((unsigned long)hbus);
return 0;
}