[PATCH v4 10/15] x86: hyperv: Add mshv_handler irq handler and setup function
From: Nuno Das Neves <hidden>
Date: 2023-09-29 18:02:59
Also in:
linux-arch, linux-hyperv, linux-patches, lkml
Subsystem:
generic include/asm header files, hyper-v/azure core and drivers, the rest, x86 architecture (32-bit and 64-bit) · Maintainers:
Arnd Bergmann, "K. Y. Srinivasan", Haiyang Zhang, Wei Liu, Dexuan Cui, Long Li, Linus Torvalds, Thomas Gleixner, Ingo Molnar, Borislav Petkov, Dave Hansen
This will handle SYNIC interrupts such as intercepts, doorbells, and scheduling messages intended for the mshv driver. Signed-off-by: Nuno Das Neves <redacted> Reviewed-by: Wei Liu <wei.liu@kernel.org> Reviewed-by: Tianyu Lan <redacted> --- arch/x86/kernel/cpu/mshyperv.c | 9 +++++++++ drivers/hv/hv_common.c | 5 +++++ include/asm-generic/mshyperv.h | 2 ++ 3 files changed, 16 insertions(+)
diff --git a/arch/x86/kernel/cpu/mshyperv.c b/arch/x86/kernel/cpu/mshyperv.c
index 9b898b65a013..06f79963add5 100644
--- a/arch/x86/kernel/cpu/mshyperv.c
+++ b/arch/x86/kernel/cpu/mshyperv.c@@ -110,6 +110,7 @@ void hv_set_register(unsigned int reg, u64 value) } EXPORT_SYMBOL_GPL(hv_set_register); +static void (*mshv_handler)(void); static void (*vmbus_handler)(void); static void (*hv_stimer0_handler)(void); static void (*hv_kexec_handler)(void);
@@ -120,6 +121,9 @@ DEFINE_IDTENTRY_SYSVEC(sysvec_hyperv_callback) struct pt_regs *old_regs = set_irq_regs(regs); inc_irq_stat(irq_hv_callback_count); + if (mshv_handler) + mshv_handler(); + if (vmbus_handler) vmbus_handler();
@@ -129,6 +133,11 @@ DEFINE_IDTENTRY_SYSVEC(sysvec_hyperv_callback) set_irq_regs(old_regs); } +void hv_setup_mshv_irq(void (*handler)(void)) +{ + mshv_handler = handler; +} + void hv_setup_vmbus_handler(void (*handler)(void)) { vmbus_handler = handler;
diff --git a/drivers/hv/hv_common.c b/drivers/hv/hv_common.c
index 3f6f23e4c579..6ec63502d83d 100644
--- a/drivers/hv/hv_common.c
+++ b/drivers/hv/hv_common.c@@ -585,6 +585,11 @@ void __weak hv_remove_vmbus_handler(void) } EXPORT_SYMBOL_GPL(hv_remove_vmbus_handler); +void __weak hv_setup_mshv_irq(void (*handler)(void)) +{ +} +EXPORT_SYMBOL_GPL(hv_setup_mshv_irq); + void __weak hv_setup_kexec_handler(void (*handler)(void)) { }
diff --git a/include/asm-generic/mshyperv.h b/include/asm-generic/mshyperv.h
index 4e49fd662b2b..d832852d0ee7 100644
--- a/include/asm-generic/mshyperv.h
+++ b/include/asm-generic/mshyperv.h@@ -198,6 +198,8 @@ void hv_remove_vmbus_handler(void); void hv_setup_stimer0_handler(void (*handler)(void)); void hv_remove_stimer0_handler(void); +void hv_setup_mshv_irq(void (*handler)(void)); + void hv_setup_kexec_handler(void (*handler)(void)); void hv_remove_kexec_handler(void); void hv_setup_crash_handler(void (*handler)(struct pt_regs *regs));
--
2.25.1
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