On Fri, Nov 19, 2021 at 03:27:57PM -0800, Michael Sterritt wrote: > Properly type the operands being passed to __put_user()/__get_user(). > Otherwise, these routines truncate data for dependent instructions > (e.g., INSW) and only read/write one byte. > > Tested: Tested by sending a string with `REP OUTSW` to a port and then > reading it back in with `REP INSW` on the same port. Previous behavior > was to only send and receive the first char of the size. For example, > word operations for "abcd" would only read/write "ac". With change, the > full string is now written and read back. > > Fixes: f980f9c31a923 (x86/sev-es: Compile early handler code into kernel image) > Reviewed-by: Paolo Bonzini <pbonzini@xxxxxxxxxx> > Reviewed-by: Marc Orr <marcorr@xxxxxxxxxx> > Reviewed-by: Peter Gonda <pgonda@xxxxxxxxxx> > Signed-off-by: Michael Sterritt <sterritt@xxxxxxxxxx> Reviewed-by: Joerg Roedel <jroedel@xxxxxxx>
