After the ACRN hypervisor sends the upcall notify interrupt, the upcall ISR
handler will be served. Now almost nothing is handled in upcall ISR handler
except acking EOI.
The driver-specific ISR handler is registered by the driver, which helps to
handle the real notification from ACRN hypervisor.
This is similar to that in XEN/HyperV.
Co-developed-by: Jason Chen CJ <jason.cj.chen@xxxxxxxxx>
Signed-off-by: Jason Chen CJ <jason.cj.chen@xxxxxxxxx>
Signed-off-by: Zhao Yakui <yakui.zhao@xxxxxxxxx>
---
arch/x86/include/asm/acrn.h | 3 +++
arch/x86/kernel/cpu/acrn.c | 12 ++++++++++++
2 files changed, 15 insertions(+)
diff --git a/arch/x86/include/asm/acrn.h b/arch/x86/include/asm/acrn.h
index 4adb13f..857e6244 100644
--- a/arch/x86/include/asm/acrn.h
+++ b/arch/x86/include/asm/acrn.h
@@ -8,4 +8,7 @@ extern void acrn_hv_callback_vector(void);
#endif
extern void acrn_hv_vector_handler(struct pt_regs *regs);
+
+extern void acrn_setup_intr_irq(void (*handler)(void));
+extern void acrn_remove_intr_irq(void);
#endif /* _ASM_X86_ACRN_H */
diff --git a/arch/x86/kernel/cpu/acrn.c b/arch/x86/kernel/cpu/acrn.c
index 95db5c4..a1ce52a 100644
--- a/arch/x86/kernel/cpu/acrn.c
+++ b/arch/x86/kernel/cpu/acrn.c
@@ -56,6 +56,18 @@ __visible void __irq_entry acrn_hv_vector_handler(struct pt_regs *regs)
set_irq_regs(old_regs);
}
+void acrn_setup_intr_irq(void (*handler)(void))
+{
+ acrn_intr_handler = handler;
+}
+EXPORT_SYMBOL_GPL(acrn_setup_intr_irq);
+
+void acrn_remove_intr_irq(void)
+{
+ acrn_intr_handler = NULL;
+}
+EXPORT_SYMBOL_GPL(acrn_remove_intr_irq);
+
const __initconst struct hypervisor_x86 x86_hyper_acrn = {
.name = "ACRN",
.detect = acrn_detect,
--
2.7.4
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