[PATCH 11/17] mshv: HvClearVirtualInterrupt hypercall
From: Vineeth Pillai <hidden>
Date: 2021-06-02 17:21:41
Also in:
lkml
Subsystem:
generic include/asm header files, hyper-v/azure core and drivers, the rest · Maintainers:
Arnd Bergmann, "K. Y. Srinivasan", Haiyang Zhang, Wei Liu, Dexuan Cui, Long Li, Linus Torvalds
For HvX64InterruptTypeExtInt interrupts, before asserting a new interrupt, previous inteerupt's acknowledgment should be cleared by this hypercall HvClearVirtualInterrupt. (TLFS 10.3.2) This is to be used in a later patch in this series. Signed-off-by: Vineeth Pillai <redacted> --- drivers/hv/hv_call.c | 20 ++++++++++++++++++++ drivers/hv/mshv.h | 1 + include/asm-generic/hyperv-tlfs.h | 1 + 3 files changed, 22 insertions(+)
diff --git a/drivers/hv/hv_call.c b/drivers/hv/hv_call.c
index 57db3a8ac94a..d5cdbe4e93da 100644
--- a/drivers/hv/hv_call.c
+++ b/drivers/hv/hv_call.c@@ -743,6 +743,26 @@ int hv_call_translate_virtual_address( } +int +hv_call_clear_virtual_interrupt(u64 partition_id) +{ + unsigned long flags; + int status; + + local_irq_save(flags); + status = hv_do_fast_hypercall8(HVCALL_CLEAR_VIRTUAL_INTERRUPT, + partition_id) & + HV_HYPERCALL_RESULT_MASK; + local_irq_restore(flags); + + if (status != HV_STATUS_SUCCESS) { + pr_err("%s: %s\n", __func__, hv_status_to_string(status)); + return -hv_status_to_errno(status); + } + + return 0; +} + int hv_call_create_port(u64 port_partition_id, union hv_port_id port_id, u64 connection_partition_id,
diff --git a/drivers/hv/mshv.h b/drivers/hv/mshv.h
index 76cd00fd4b3f..404807c98512 100644
--- a/drivers/hv/mshv.h
+++ b/drivers/hv/mshv.h@@ -117,6 +117,7 @@ int hv_call_assert_virtual_interrupt( u32 vector, u64 dest_addr, union hv_interrupt_control control); +int hv_call_clear_virtual_interrupt(u64 partition_id); int hv_call_get_vp_state( u32 vp_index, u64 partition_id,
diff --git a/include/asm-generic/hyperv-tlfs.h b/include/asm-generic/hyperv-tlfs.h
index 3ed4f532ed57..693d41192e9e 100644
--- a/include/asm-generic/hyperv-tlfs.h
+++ b/include/asm-generic/hyperv-tlfs.h@@ -159,6 +159,7 @@ struct ms_hyperv_tsc_page { #define HVCALL_GET_VP_REGISTERS 0x0050 #define HVCALL_SET_VP_REGISTERS 0x0051 #define HVCALL_TRANSLATE_VIRTUAL_ADDRESS 0x0052 +#define HVCALL_CLEAR_VIRTUAL_INTERRUPT 0x0056 #define HVCALL_DELETE_PORT 0x0058 #define HVCALL_DISCONNECT_PORT 0x005b #define HVCALL_POST_MESSAGE 0x005c
--
2.25.1