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crosvm: Add KVM_SIGNAL_MSI ioctl.

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This ioctl is necessary for a userspace IOAPIC.

TEST=Built
BUG=chromium:908689

Change-Id: I52fc96baef2193e4f673bbce17a1b56ded9aa6a6
Reviewed-on: https://chromium-review.googlesource.com/1515992
Commit-Ready: Miriam Zimmerman <mutexlox@chromium.org>
Tested-by: Miriam Zimmerman <mutexlox@chromium.org>
Tested-by: kokoro <noreply+kokoro@google.com>
Reviewed-by: Zach Reizner <zachr@chromium.org>
This commit is contained in:
Miriam Zimmerman 2019-03-11 10:18:01 -07:00 committed by chrome-bot
parent 7374f32ba4
commit 49f071ad4f
1 changed files with 14 additions and 0 deletions
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14
kvm/src/lib.rs
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@ -941,6 +941,20 @@ impl Vm {
cap.args[0] = 24;
self.kvm_enable_cap(&cap)
}
/// Request that the kernel inject the specified MSI message.
/// Returns Ok(true) on delivery, Ok(false) if the guest blocked delivery, or an error.
/// See kernel documentation for KVM_SIGNAL_MSI.
pub fn signal_msi(&self, msi: &kvm_msi) -> Result<bool> {
// safe becuase we allocated the struct and we know the kernel will read
// exactly the size of the struct
let ret = unsafe { ioctl_with_ref(self, KVM_SIGNAL_MSI(), msi) };
if ret < 0 {
errno_result()
} else {
Ok(ret > 0)
}
}
}
impl AsRawFd for Vm {