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

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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: 89d01306e3 ("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>
This commit is contained in:
Anup Patel
2026-01-20 13:29:49 +05:30
committed by Anup Patel
parent 24433b2b5c
commit c61ec3e8cc
1 changed files with 4 additions and 0 deletions
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4
arch/riscv/kvm/aia_device.c
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@@ -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;