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authorLinus Torvalds <torvalds@linux-foundation.org>2020-10-15 15:48:06 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2020-10-15 15:48:06 -0700
commit2d0f6b0aab9afbd6fdf3514cb4acc249d7aebf9c (patch)
treec2775ad59e5ae25d5d3d537387b76bc14039748c /drivers/hv
parent7286d2a37eb955c5eeec2b042844f1c1b3ff0fe1 (diff)
parent626b901f60446355e35e8c76c6b391a7d7491203 (diff)
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Merge tag 'hyperv-next-signed' of git://git.kernel.org/pub/scm/linux/kernel/git/hyperv/linux
Pull another Hyper-V update from Wei Liu: "One patch from Michael to get VMbus interrupt from ACPI DSDT" * tag 'hyperv-next-signed' of git://git.kernel.org/pub/scm/linux/kernel/git/hyperv/linux: Drivers: hv: vmbus: Add parsing of VMbus interrupt in ACPI DSDT
Diffstat (limited to 'drivers/hv')
-rw-r--r--drivers/hv/hv.c2
-rw-r--r--drivers/hv/vmbus_drv.c30
2 files changed, 28 insertions, 4 deletions
diff --git a/drivers/hv/hv.c b/drivers/hv/hv.c
index 410f1fab519c..0cde10fe0e71 100644
--- a/drivers/hv/hv.c
+++ b/drivers/hv/hv.c
@@ -180,7 +180,7 @@ void hv_synic_enable_regs(unsigned int cpu)
/* Setup the shared SINT. */
hv_get_synint_state(VMBUS_MESSAGE_SINT, shared_sint.as_uint64);
- shared_sint.vector = HYPERVISOR_CALLBACK_VECTOR;
+ shared_sint.vector = hv_get_vector();
shared_sint.masked = false;
shared_sint.auto_eoi = hv_recommend_using_aeoi();
hv_set_synint_state(VMBUS_MESSAGE_SINT, shared_sint.as_uint64);
diff --git a/drivers/hv/vmbus_drv.c b/drivers/hv/vmbus_drv.c
index 7b8816c2e5f9..4fad3e6745e5 100644
--- a/drivers/hv/vmbus_drv.c
+++ b/drivers/hv/vmbus_drv.c
@@ -48,6 +48,10 @@ static int hyperv_cpuhp_online;
static void *hv_panic_page;
+/* Values parsed from ACPI DSDT */
+static int vmbus_irq;
+int vmbus_interrupt;
+
/*
* Boolean to control whether to report panic messages over Hyper-V.
*
@@ -1347,7 +1351,7 @@ static void vmbus_isr(void)
tasklet_schedule(&hv_cpu->msg_dpc);
}
- add_interrupt_randomness(HYPERVISOR_CALLBACK_VECTOR, 0);
+ add_interrupt_randomness(hv_get_vector(), 0);
}
/*
@@ -1430,7 +1434,9 @@ static int vmbus_bus_init(void)
if (ret)
return ret;
- hv_setup_vmbus_irq(vmbus_isr);
+ ret = hv_setup_vmbus_irq(vmbus_irq, vmbus_isr);
+ if (ret)
+ goto err_setup;
ret = hv_synic_alloc();
if (ret)
@@ -1505,7 +1511,7 @@ err_cpuhp:
hv_synic_free();
err_alloc:
hv_remove_vmbus_irq();
-
+err_setup:
bus_unregister(&hv_bus);
unregister_sysctl_table(hv_ctl_table_hdr);
hv_ctl_table_hdr = NULL;
@@ -2070,6 +2076,7 @@ static acpi_status vmbus_walk_resources(struct acpi_resource *res, void *ctx)
struct resource *new_res;
struct resource **old_res = &hyperv_mmio;
struct resource **prev_res = NULL;
+ struct resource r;
switch (res->type) {
@@ -2088,6 +2095,23 @@ static acpi_status vmbus_walk_resources(struct acpi_resource *res, void *ctx)
end = res->data.address64.address.maximum;
break;
+ /*
+ * The IRQ information is needed only on ARM64, which Hyper-V
+ * sets up in the extended format. IRQ information is present
+ * on x86/x64 in the non-extended format but it is not used by
+ * Linux. So don't bother checking for the non-extended format.
+ */
+ case ACPI_RESOURCE_TYPE_EXTENDED_IRQ:
+ if (!acpi_dev_resource_interrupt(res, 0, &r)) {
+ pr_err("Unable to parse Hyper-V ACPI interrupt\n");
+ return AE_ERROR;
+ }
+ /* ARM64 INTID for VMbus */
+ vmbus_interrupt = res->data.extended_irq.interrupts[0];
+ /* Linux IRQ number */
+ vmbus_irq = r.start;
+ return AE_OK;
+
default:
/* Unused resource type */
return AE_OK;