Commit c61ec3e8 authored by Anup Patel's avatar Anup Patel Committed by Anup Patel
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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: 89d01306 ("RISC-V: KVM: Implement device interface for AIA irqchip")
Signed-off-by: default avatarAnup Patel <anup.patel@oss.qualcomm.com>
Link: https://lore.kernel.org/r/20260120080013.2153519-4-anup.patel@oss.qualcomm.com


Signed-off-by: default avatarAnup Patel <anup@brainfault.org>
parent 24433b2b

arch/riscv/kvm/aia_device.c

+4 −0
Original line number Diff line number Diff line
@@ -11,6 +11,7 @@ 
#include <linux/irqchip/riscv-imsic.h>

#include <linux/kvm_host.h>

#include <linux/uaccess.h>

#include <linux/cpufeature.h>



static int aia_create(struct kvm_device *dev, u32 type)

{
@@ -22,6 +23,9 @@ static int aia_create(struct kvm_device *dev, u32 type) 
	if (irqchip_in_kernel(kvm))

		return -EEXIST;



	if (!riscv_isa_extension_available(NULL, SSAIA))

		return -ENODEV;



	ret = -EBUSY;

	if (kvm_trylock_all_vcpus(kvm))

		return ret;