diff options
| -rw-r--r-- | arch/x86/include/asm/mshyperv.h | 1 | ||||
| -rw-r--r-- | arch/x86/kernel/cpu/mshyperv.c | 7 | ||||
| -rw-r--r-- | drivers/hv/hv.c | 2 | ||||
| -rw-r--r-- | drivers/hv/vmbus_drv.c | 30 | ||||
| -rw-r--r-- | include/asm-generic/mshyperv.h | 4 |
5 files changed, 38 insertions, 6 deletions
diff --git a/arch/x86/include/asm/mshyperv.h b/arch/x86/include/asm/mshyperv.h index 4f77b8f22e54..ffc289992d1b 100644 --- a/arch/x86/include/asm/mshyperv.h +++ b/arch/x86/include/asm/mshyperv.h @@ -54,6 +54,7 @@ typedef int (*hyperv_fill_flush_list_func)( #define hv_enable_vdso_clocksource() \ vclocks_set_used(VDSO_CLOCKMODE_HVCLOCK); #define hv_get_raw_timer() rdtsc_ordered() +#define hv_get_vector() HYPERVISOR_CALLBACK_VECTOR /* * Reference to pv_ops must be inline so objtool diff --git a/arch/x86/kernel/cpu/mshyperv.c b/arch/x86/kernel/cpu/mshyperv.c index 9834a43cd0fa..05ef1f4550cb 100644 --- a/arch/x86/kernel/cpu/mshyperv.c +++ b/arch/x86/kernel/cpu/mshyperv.c @@ -55,9 +55,14 @@ DEFINE_IDTENTRY_SYSVEC(sysvec_hyperv_callback) set_irq_regs(old_regs); } -void hv_setup_vmbus_irq(void (*handler)(void)) +int hv_setup_vmbus_irq(int irq, void (*handler)(void)) { + /* + * The 'irq' argument is ignored on x86/x64 because a hard-coded + * interrupt vector is used for Hyper-V interrupts. + */ vmbus_handler = handler; + return 0; } void hv_remove_vmbus_irq(void) 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; diff --git a/include/asm-generic/mshyperv.h b/include/asm-generic/mshyperv.h index c5edc5e08b94..c57799684170 100644 --- a/include/asm-generic/mshyperv.h +++ b/include/asm-generic/mshyperv.h @@ -89,7 +89,7 @@ static inline void vmbus_signal_eom(struct hv_message *msg, u32 old_msg_type) } } -void hv_setup_vmbus_irq(void (*handler)(void)); +int hv_setup_vmbus_irq(int irq, void (*handler)(void)); void hv_remove_vmbus_irq(void); void hv_enable_vmbus_irq(void); void hv_disable_vmbus_irq(void); @@ -99,6 +99,8 @@ void hv_remove_kexec_handler(void); void hv_setup_crash_handler(void (*handler)(struct pt_regs *regs)); void hv_remove_crash_handler(void); +extern int vmbus_interrupt; + #if IS_ENABLED(CONFIG_HYPERV) /* * Hypervisor's notion of virtual processor ID is different from |