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PCI: hv: Use vPCI protocol version 1.2

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Update the Hyper-V vPCI driver to use the Server-2016 version of the vPCI
protocol, fixing MSI creation and retargeting issues.

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 13:41:28 -07:00 committed by Bjorn Helgaas
parent b1db7e7e1d
commit 7dcf90e9e0
2 changed files with 252 additions and 54 deletions
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6
arch/x86/include/uapi/asm/hyperv.h
View File

@ -152,6 +152,12 @@
*/
#define HV_X64_DEPRECATING_AEOI_RECOMMENDED (1 << 9)
/*
* HV_VP_SET available
*/
#define HV_X64_EX_PROCESSOR_MASKS_RECOMMENDED (1 << 11)
/*
* Crash notification flag.
*/

300
drivers/pci/host/pci-hyperv.c
View File

@ -70,6 +70,7 @@
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
@ -79,6 +80,7 @@ enum pci_protocol_version_t {
* first.
*/
static enum pci_protocol_version_t pci_protocol_versions[] = {
PCI_PROTOCOL_VERSION_1_2,
PCI_PROTOCOL_VERSION_1_1,
};
@ -124,6 +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
};
@ -193,6 +198,30 @@ struct hv_msi_desc {
u64 cpu_mask;
} __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
@ -309,6 +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;
@ -321,6 +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;
@ -346,17 +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;
/*
@ -850,8 +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);
@ -863,23 +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;
for_each_cpu_and(cpu, dest, cpu_online_mask)
params->vp_mask |= (1ULL << hv_tmp_cpu_nr_to_vp_nr(cpu));
/*
* 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?).
*/
hv_do_hypercall(HVCALL_RETARGET_INTERRUPT, params, NULL);
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) {
cpu_vmbus = hv_tmp_cpu_nr_to_vp_nr(cpu);
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);
}
@ -900,6 +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
@ -918,15 +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));
@ -949,36 +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;
/*
* 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 << hv_tmp_cpu_nr_to_vp_nr(cpu));
}
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;
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);
@ -2177,13 +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;
@ -2194,22 +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;