From: Anup Patel <anup.patel@oss.qualcomm.com>
To: Paolo Bonzini <pbonzini@redhat.com>, Atish Patra <atish.patra@linux.dev>
Cc: Palmer Dabbelt <palmer@dabbelt.com>,
Paul Walmsley <pjw@kernel.org>, Alexandre Ghiti <alex@ghiti.fr>,
Shuah Khan <shuah@kernel.org>, Anup Patel <anup@brainfault.org>,
Andrew Jones <andrew.jones@oss.qualcomm.com>,
kvm-riscv@lists.infradead.org, kvm@vger.kernel.org,
linux-riscv@lists.infradead.org, linux-kernel@vger.kernel.org,
linux-kselftest@vger.kernel.org,
Anup Patel <anup.patel@oss.qualcomm.com>
Subject: [PATCH 03/27] RISC-V: KVM: Check host Ssaia extension when creating AIA irqchip
Date: Tue, 20 Jan 2026 13:29:49 +0530 [thread overview]
Message-ID: <20260120080013.2153519-4-anup.patel@oss.qualcomm.com> (raw)
In-Reply-To: <20260120080013.2153519-1-anup.patel@oss.qualcomm.com>
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>
---
arch/riscv/kvm/aia_device.c | 4 ++++
1 file changed, 4 insertions(+)
diff --git a/arch/riscv/kvm/aia_device.c b/arch/riscv/kvm/aia_device.c
index b195a93add1c..bed4d2c8c44c 100644
--- a/arch/riscv/kvm/aia_device.c
+++ b/arch/riscv/kvm/aia_device.c
@@ -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;
--
2.43.0
next prev parent reply other threads:[~2026-01-20 8:01 UTC|newest]
Thread overview: 38+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-01-20 7:59 [PATCH 00/27] Nested virtualization for KVM RISC-V Anup Patel
2026-01-20 7:59 ` [PATCH 01/27] RISC-V: KVM: Fix error code returned for Smstateen ONE_REG Anup Patel
2026-03-06 7:04 ` Anup Patel
2026-01-20 7:59 ` [PATCH 02/27] RISC-V: KVM: Fix error code returned for Ssaia ONE_REG Anup Patel
2026-03-06 7:04 ` Anup Patel
2026-01-20 7:59 ` Anup Patel [this message]
2026-03-06 7:04 ` [PATCH 03/27] RISC-V: KVM: Check host Ssaia extension when creating AIA irqchip Anup Patel
2026-01-20 7:59 ` [PATCH 04/27] RISC-V: KVM: Introduce common kvm_riscv_isa_check_host() Anup Patel
2026-03-13 14:22 ` Radim Krčmář
2026-01-20 7:59 ` [PATCH 05/27] RISC-V: KVM: Factor-out ISA checks into separate sources Anup Patel
2026-03-13 14:14 ` Radim Krčmář
2026-04-03 12:34 ` Anup Patel
2026-01-20 7:59 ` [PATCH 06/27] RISC-V: KVM: Move timer state defines closer to struct in UAPI header Anup Patel
2026-01-20 7:59 ` [PATCH 07/27] RISC-V: KVM: Add hideleg to struct kvm_vcpu_config Anup Patel
2026-03-13 13:49 ` Radim Krčmář
2026-01-20 7:59 ` [PATCH 08/27] RISC-V: KVM: Factor-out VCPU config into separate sources Anup Patel
2026-03-13 13:46 ` Radim Krčmář
2026-01-20 7:59 ` [PATCH 09/27] RISC-V: KVM: Don't check hstateen0 when updating sstateen0 CSR Anup Patel
2026-03-13 13:27 ` Radim Krčmář
2026-01-20 7:59 ` [PATCH 10/27] RISC-V: KVM: Initial skeletal nested virtualization support Anup Patel
2026-01-20 7:59 ` [PATCH 11/27] RISC-V: KVM: Use half VMID space for nested guest Anup Patel
2026-01-20 7:59 ` [PATCH 12/27] RISC-V: KVM: Extend kvm_riscv_mmu_update_hgatp() for nested virtualization Anup Patel
2026-01-20 7:59 ` [PATCH 13/27] RISC-V: KVM: Extend kvm_riscv_vcpu_config_load() " Anup Patel
2026-01-20 8:00 ` [PATCH 14/27] RISC-V: KVM: Extend kvm_riscv_vcpu_update_timedelta() for nested virt Anup Patel
2026-01-20 8:00 ` [PATCH 15/27] RISC-V: KVM: Extend trap redirection for nested virtualization Anup Patel
2026-01-20 8:00 ` [PATCH 16/27] RISC-V: KVM: Check and inject nested virtual interrupts Anup Patel
2026-01-20 8:00 ` [PATCH 17/27] RISC-V: KVM: Extend kvm_riscv_isa_check_host() for nested virt Anup Patel
2026-01-20 8:00 ` [PATCH 18/27] RISC-V: KVM: Trap-n-emulate SRET for Guest HS-mode Anup Patel
2026-01-20 8:00 ` [PATCH 19/27] RISC-V: KVM: Redirect nested supervisor ecall and breakpoint traps Anup Patel
2026-01-20 8:00 ` [PATCH 20/27] RISC-V: KVM: Redirect nested WFI and WRS traps Anup Patel
2026-01-20 8:00 ` [PATCH 21/27] RISC-V: KVM: Implement remote HFENCE SBI calls for guest Anup Patel
2026-01-20 8:00 ` [PATCH 22/27] RISC-V: KVM: Add CSR emulation for nested virtualization Anup Patel
2026-01-20 8:00 ` [PATCH 23/27] RISC-V: KVM: Add HFENCE " Anup Patel
2026-01-20 8:00 ` [PATCH 24/27] RISC-V: KVM: Add ONE_REG interface for nested virtualization state Anup Patel
2026-01-20 8:00 ` [PATCH 25/27] RISC-V: KVM: selftests: Add nested virt state to get-reg-list test Anup Patel
2026-01-20 8:00 ` [PATCH 26/27] RISC-V: KVM: Add ONE_REG interface for nested virtualization CSRs Anup Patel
2026-01-20 8:00 ` [PATCH 27/27] RISC-V: KVM: selftests: Add nested virt CSRs to get-reg-list test Anup Patel
2026-04-03 12:36 ` [PATCH 00/27] Nested virtualization for KVM RISC-V Anup Patel
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