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[RFC,31/48] RISC-V: KVM: Indicate no support user space emulated IRQCHIP

Message ID 20230419221716.3603068-32-atishp@rivosinc.com (mailing list archive)
State Superseded
Headers show
Series RISC-V CoVE support | expand

Checks

Context Check Description
conchuod/tree_selection fail Failed to apply to next/pending-fixes or riscv/for-next

Commit Message

Atish Kumar Patra April 19, 2023, 10:16 p.m. UTC 
The KVM_INTERRUPT IOCTL is used for the userspace emulated IRQCHIP.
The TEE use case do not support that yet. Return appropriate error
in case any VMM tries to invoke that operation.

Signed-off-by: Atish Patra <atishp@rivosinc.com>
---
 arch/riscv/kvm/vcpu.c | 3 +++
 1 file changed, 3 insertions(+)
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Patch

diff --git a/arch/riscv/kvm/vcpu.c b/arch/riscv/kvm/vcpu.c
index 20d4800..65f87e1 100644
--- a/arch/riscv/kvm/vcpu.c
+++ b/arch/riscv/kvm/vcpu.c
@@ -716,6 +716,9 @@  long kvm_arch_vcpu_async_ioctl(struct file *filp,
 
 	if (ioctl == KVM_INTERRUPT) {
 		struct kvm_interrupt irq;
+		/* We do not support user space emulated IRQCHIP for TVMs yet */
+		if (is_cove_vcpu(vcpu))
+			return -ENXIO;
 
 		if (copy_from_user(&irq, argp, sizeof(irq)))
 			return -EFAULT;