On Thu, 20 Oct 2022 09:00:08 +0000 Janosch Frank <frankja@xxxxxxxxxxxxx> wrote: > Convert the sblk to non-PV when the PV guest is destroyed. > > Early return in uv_init() instead of running into the assert. This is > necessary since snippet_pv_init() will always call uv_init(). > > Signed-off-by: Janosch Frank <frankja@xxxxxxxxxxxxx> Reviewed-by: Claudio Imbrenda <imbrenda@xxxxxxxxxxxxx> > --- > lib/s390x/uv.c | 11 ++++++++++- > 1 file changed, 10 insertions(+), 1 deletion(-) > > diff --git a/lib/s390x/uv.c b/lib/s390x/uv.c > index 0b6eb843..99775929 100644 > --- a/lib/s390x/uv.c > +++ b/lib/s390x/uv.c > @@ -76,7 +76,8 @@ void uv_init(void) > int cc; > > /* Let's not do this twice */ > - assert(!initialized); > + if (initialized) > + return; > /* Query is done on initialization but let's check anyway */ > assert(uvcb_qui.header.rc == 1 || uvcb_qui.header.rc == 0x100); > > @@ -188,6 +189,14 @@ void uv_destroy_guest(struct vm *vm) > free_pages(vm->uv.conf_var_stor); > > free_pages((void *)(vm->uv.asce & PAGE_MASK)); > + memset(&vm->uv, 0, sizeof(vm->uv)); > + > + /* Convert the sblk back to non-PV */ > + vm->save_area.guest.asce = stctg(1); > + vm->sblk->sdf = 0; > + vm->sblk->sidad = 0; > + vm->sblk->pv_handle_cpu = 0; > + vm->sblk->pv_handle_config = 0; > } > > int uv_unpack(struct vm *vm, uint64_t addr, uint64_t len, uint64_t tweak)
