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kvm: require KVM_CAP_SIGNAL_MSI

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This was introduced in KVM in Linux 3.5, we can require it unconditionally
in kvm_irqchip_send_msi().  However, not all architectures have to implement
it so check it only in x86, the only architecture that ever had MSI injection
but not KVM_CAP_SIGNAL_MSI.

ARM uses it to detect the presence of the ITS emulation in the kernel,
introduced in Linux 4.8.  Assume that it's there and possibly fail when
realizing the arm-its-kvm device.

Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
This commit is contained in:
Paolo Bonzini 2023-10-17 13:24:33 +02:00
parent aacec9aee1
commit cc5e719e2c
6 changed files with 9 additions and 108 deletions
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1
accel/stubs/kvm-stub.c
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@ -27,7 +27,6 @@ bool kvm_allowed;
bool kvm_readonly_mem_allowed;
bool kvm_ioeventfd_any_length_allowed;
bool kvm_msi_use_devid;
bool kvm_direct_msi_allowed;
void kvm_flush_coalesced_mmio_buffer(void)
{