From 24ea7abcdc8654ad2d9831a79c6d6f580aca6a3c Mon Sep 17 00:00:00 2001 From: Julien Grall Date: Thu, 6 Feb 2020 15:41:18 +0000 Subject: [PATCH] xen/include: public: Document the padding in struct xen_hvm_param There is an implicit padding of 2 bytes in struct xen_hvm_param between the field domid and index. Make it explicit by introduce a padding field. This can also serve as documentation. Note that I don't think we can mandate it to be zero because a guest may not have initialized the padding. Signed-off-by: Julien Grall Acked-by: Jan Beulich Acked-by: Wei Liu --- xen/include/public/hvm/hvm_op.h | 1 + 1 file changed, 1 insertion(+) diff --git a/xen/include/public/hvm/hvm_op.h b/xen/include/public/hvm/hvm_op.h index 610e020a62..b599d3cbd0 100644 --- a/xen/include/public/hvm/hvm_op.h +++ b/xen/include/public/hvm/hvm_op.h @@ -32,6 +32,7 @@ #define HVMOP_get_param 1 struct xen_hvm_param { domid_t domid; /* IN */ + uint16_t pad; uint32_t index; /* IN */ uint64_t value; /* IN/OUT */ }; -- 2.30.2