On Fri, 2023-08-11 at 14:48 -0700, Dexuan Cui wrote: > When a TDX guest runs on Hyper-V, the hv_netvsc driver's netvsc_init_buf() > allocates buffers using vzalloc(), and needs to share the buffers with the > host OS by calling set_memory_decrypted(), which is not working for > vmalloc() yet. Add the support by handling the pages one by one. > > Co-developed-by: Kirill A. Shutemov <kirill.shutemov@xxxxxxxxxxxxxxx> > Signed-off-by: Kirill A. Shutemov <kirill.shutemov@xxxxxxxxxxxxxxx> > Reviewed-by: Michael Kelley <mikelley@xxxxxxxxxxxxx> > Reviewed-by: Kuppuswamy Sathyanarayanan <sathyanarayanan.kuppuswamy@xxxxxxxxxxxxxxx> > Signed-off-by: Dexuan Cui <decui@xxxxxxxxxxxxx> Acked-by: Kai Huang <kai.huang@xxxxxxxxx> One nit below ... [...] > > - if (!tdx_map_gpa(start, end, enc)) > + if (offset_in_page(start) != 0) > return false; ... "!= 0" isn't needed. Or should we even WARN()? IIUC by reaching here the caller should already verified both address and size are page aligned, but I didn't do full check.
