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authorAnup Patel <apatel@ventanamicro.com>2023-06-15 10:33:48 +0300
committerAnup Patel <anup@brainfault.org>2023-06-18 18:54:40 +0300
commit00f918f61c56a46d9e09ce21b54b8c21f496c753 (patch)
tree3b1c10db07bf425d56fd2cbe736d9f010375fbec /arch/riscv/include
parentf0607e6215b2329bb8f3117b34ccfc6447e14f22 (diff)
downloadlinux-00f918f61c56a46d9e09ce21b54b8c21f496c753.tar.xz
RISC-V: KVM: Skeletal in-kernel AIA irqchip support
To incrementally implement in-kernel AIA irqchip support, we first add minimal skeletal support which only compiles but does not provide any functionality. Signed-off-by: Anup Patel <apatel@ventanamicro.com> Reviewed-by: Atish Patra <atishp@rivosinc.com> Signed-off-by: Anup Patel <anup@brainfault.org>
Diffstat (limited to 'arch/riscv/include')
-rw-r--r--arch/riscv/include/asm/kvm_aia.h20
-rw-r--r--arch/riscv/include/asm/kvm_host.h4
-rw-r--r--arch/riscv/include/uapi/asm/kvm.h4
3 files changed, 28 insertions, 0 deletions
diff --git a/arch/riscv/include/asm/kvm_aia.h b/arch/riscv/include/asm/kvm_aia.h
index 0938e0cadf80..3bc0a0e47a15 100644
--- a/arch/riscv/include/asm/kvm_aia.h
+++ b/arch/riscv/include/asm/kvm_aia.h
@@ -45,6 +45,7 @@ struct kvm_vcpu_aia {
#define irqchip_in_kernel(k) ((k)->arch.aia.in_kernel)
extern unsigned int kvm_riscv_aia_nr_hgei;
+extern unsigned int kvm_riscv_aia_max_ids;
DECLARE_STATIC_KEY_FALSE(kvm_riscv_aia_available);
#define kvm_riscv_aia_available() \
static_branch_unlikely(&kvm_riscv_aia_available)
@@ -116,6 +117,25 @@ static inline void kvm_riscv_vcpu_aia_deinit(struct kvm_vcpu *vcpu)
{
}
+static inline int kvm_riscv_aia_inject_msi_by_id(struct kvm *kvm,
+ u32 hart_index,
+ u32 guest_index, u32 iid)
+{
+ return 0;
+}
+
+static inline int kvm_riscv_aia_inject_msi(struct kvm *kvm,
+ struct kvm_msi *msi)
+{
+ return 0;
+}
+
+static inline int kvm_riscv_aia_inject_irq(struct kvm *kvm,
+ unsigned int irq, bool level)
+{
+ return 0;
+}
+
static inline void kvm_riscv_aia_init_vm(struct kvm *kvm)
{
}
diff --git a/arch/riscv/include/asm/kvm_host.h b/arch/riscv/include/asm/kvm_host.h
index ee0acccb1d3b..871432586a63 100644
--- a/arch/riscv/include/asm/kvm_host.h
+++ b/arch/riscv/include/asm/kvm_host.h
@@ -27,6 +27,8 @@
#define KVM_VCPU_MAX_FEATURES 0
+#define KVM_IRQCHIP_NUM_PINS 1024
+
#define KVM_REQ_SLEEP \
KVM_ARCH_REQ_FLAGS(0, KVM_REQUEST_WAIT | KVM_REQUEST_NO_WAKEUP)
#define KVM_REQ_VCPU_RESET KVM_ARCH_REQ(1)
@@ -318,6 +320,8 @@ int kvm_riscv_gstage_vmid_init(struct kvm *kvm);
bool kvm_riscv_gstage_vmid_ver_changed(struct kvm_vmid *vmid);
void kvm_riscv_gstage_vmid_update(struct kvm_vcpu *vcpu);
+int kvm_riscv_setup_default_irq_routing(struct kvm *kvm, u32 lines);
+
void __kvm_riscv_unpriv_trap(void);
unsigned long kvm_riscv_vcpu_unpriv_read(struct kvm_vcpu *vcpu,
diff --git a/arch/riscv/include/uapi/asm/kvm.h b/arch/riscv/include/uapi/asm/kvm.h
index f92790c9481a..332d4a274891 100644
--- a/arch/riscv/include/uapi/asm/kvm.h
+++ b/arch/riscv/include/uapi/asm/kvm.h
@@ -15,6 +15,7 @@
#include <asm/bitsperlong.h>
#include <asm/ptrace.h>
+#define __KVM_HAVE_IRQ_LINE
#define __KVM_HAVE_READONLY_MEM
#define KVM_COALESCED_MMIO_PAGE_OFFSET 1
@@ -203,6 +204,9 @@ enum KVM_RISCV_SBI_EXT_ID {
#define KVM_REG_RISCV_SBI_MULTI_REG_LAST \
KVM_REG_RISCV_SBI_MULTI_REG(KVM_RISCV_SBI_EXT_MAX - 1)
+/* One single KVM irqchip, ie. the AIA */
+#define KVM_NR_IRQCHIPS 1
+
#endif
#endif /* __LINUX_KVM_RISCV_H */