On 11/24/18 8:12 AM, Emilio G. Cota wrote:
On Thu, Nov 22, 2018 at 15:20:25 +0800, guangrong.xiao@xxxxxxxxx wrote:
+ /*
+ * the bit in these two bitmaps indicates the index of the ＠requests
This @ is not ASCII, is it?
Good eyes. :)
Will fix it.
+ * respectively. If it's the same, the corresponding request is free
+ * and owned by the user, i.e, where the user fills a request. Otherwise,
+ * it is valid and owned by the thread, i.e, where the thread fetches
+ * the request and write the result.
+ */
+
+ /* after the user fills the request, the bit is flipped. */
+ uint64_t request_fill_bitmap QEMU_ALIGNED(SMP_CACHE_BYTES);
+ /* after handles the request, the thread flips the bit. */
+ uint64_t request_done_bitmap QEMU_ALIGNED(SMP_CACHE_BYTES);
Use DECLARE_BITMAP, otherwise you'll get type errors as David
pointed out.
If we do it, the field becomes a pointer... that complicates the
thing.
Hmm, i am using the same trick applied by kvm module when it handles
vcpu->requests:
static inline bool kvm_test_request(int req, struct kvm_vcpu *vcpu)
{
return test_bit(req & KVM_REQUEST_MASK, (void *)&vcpu->requests);
}
Is it good?
