On 05/30/2023 09:52 AM, Tianrui Zhao wrote:
Implement vcpu interrupt operations such as vcpu set irq and
vcpu clear irq, using set_gcsr_estat to set irq which is
parsed by the irq bitmap.
Signed-off-by: Tianrui Zhao <zhaotianrui@xxxxxxxxxxx>
---
arch/loongarch/kvm/interrupt.c | 127 +++++++++++++++++++++++++++++++++
arch/loongarch/kvm/vcpu.c | 45 ++++++++++++
2 files changed, 172 insertions(+)
create mode 100644 arch/loongarch/kvm/interrupt.c
diff --git a/arch/loongarch/kvm/interrupt.c b/arch/loongarch/kvm/interrupt.c
new file mode 100644
index 000000000000..243bb19b387e
--- /dev/null
+++ b/arch/loongarch/kvm/interrupt.c
@@ -0,0 +1,127 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Copyright (C) 2020-2023 Loongson Technology Corporation Limited
+ */
+
+#include <linux/errno.h>
+#include <linux/err.h>
+#include <asm/kvm_vcpu.h>
+#include <asm/kvm_csr.h>
+
+static unsigned int int_to_coreint[EXCCODE_INT_NUM] = {
+ [INT_TI] = CPU_TIMER,
+ [INT_IPI] = CPU_IPI,
+ [INT_SWI0] = CPU_SIP0,
+ [INT_SWI1] = CPU_SIP1,
+ [INT_HWI0] = CPU_IP0,
+ [INT_HWI1] = CPU_IP1,
+ [INT_HWI2] = CPU_IP2,
+ [INT_HWI3] = CPU_IP3,
+ [INT_HWI4] = CPU_IP4,
+ [INT_HWI5] = CPU_IP5,
+ [INT_HWI6] = CPU_IP6,
+ [INT_HWI7] = CPU_IP7,
+};
+
+static int _kvm_irq_deliver(struct kvm_vcpu *vcpu, unsigned int priority)
+{
+ unsigned int irq = 0;
+
+ clear_bit(priority, &vcpu->arch.irq_pending);
+ if (priority < EXCCODE_INT_NUM)
+ irq = int_to_coreint[priority];
+
+ switch (priority) {
+ case INT_TI:
+ case INT_IPI:
+ case INT_SWI0:
+ case INT_SWI1:
+ set_gcsr_estat(irq);
+ break;
+
+ case INT_HWI0:
+ case INT_HWI1:
+ case INT_HWI2:
+ case INT_HWI3:
+ case INT_HWI4:
+ case INT_HWI5:
+ case INT_HWI6:
+ case INT_HWI7:
It can be simplified to,
case INT_HWI0 ... INT_HWI7:
+ set_csr_gintc(irq);
+ break;
+
+ default:
+ break;
+ }
+
+ return 1;
+}
+
+static int _kvm_irq_clear(struct kvm_vcpu *vcpu, unsigned int priority)
+{
+ unsigned int irq = 0;
+
+ clear_bit(priority, &vcpu->arch.irq_clear);
+ if (priority < EXCCODE_INT_NUM)
+ irq = int_to_coreint[priority];
+
+ switch (priority) {
+ case INT_TI:
+ case INT_IPI:
+ case INT_SWI0:
+ case INT_SWI1:
+ clear_gcsr_estat(irq);
+ break;
+
+ case INT_HWI0:
+ case INT_HWI1:
+ case INT_HWI2:
+ case INT_HWI3:
+ case INT_HWI4:
+ case INT_HWI5:
+ case INT_HWI6:
+ case INT_HWI7:
ditto.
Thanks,
Youling
+ clear_csr_gintc(irq);
+ break;
+
+ default:
+ break;
+ }
+
+ return 1;
+}
