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RISC-V: KVM: Check host Ssaia extension when creating AIA irqchip

The KVM user-space may create KVM AIA irqchip before checking
VCPU Ssaia extension availability so KVM AIA irqchip must fail
when host does not have Ssaia extension.

Fixes: 89d01306e34d ("RISC-V: KVM: Implement device interface for AIA irqchip")
Signed-off-by: Anup Patel <anup.patel@oss.qualcomm.com>
Link: https://lore.kernel.org/r/20260120080013.2153519-4-anup.patel@oss.qualcomm.com
Signed-off-by: Anup Patel <anup@brainfault.org>

authored by

Anup Patel and committed by
Anup Patel c61ec3e8 24433b2b

+4
+4
arch/riscv/kvm/aia_device.c
··· 11 11 #include <linux/irqchip/riscv-imsic.h> 12 12 #include <linux/kvm_host.h> 13 13 #include <linux/uaccess.h> 14 + #include <linux/cpufeature.h> 14 15 15 16 static int aia_create(struct kvm_device *dev, u32 type) 16 17 { ··· 22 21 23 22 if (irqchip_in_kernel(kvm)) 24 23 return -EEXIST; 24 + 25 + if (!riscv_isa_extension_available(NULL, SSAIA)) 26 + return -ENODEV; 25 27 26 28 ret = -EBUSY; 27 29 if (kvm_trylock_all_vcpus(kvm))