Leaving shadow setup just to the L1TF tasklet means running Dom0 on a
minimally acceptable shadow memory pool, rather than what normally
would be used (also, for example, for PVH). Populate the pool before
triggering the tasklet, on a best effort basis (again like done for
PVH).
Signed-off-by: Jan Beulich <jbeul...@suse.com>
--- a/xen/arch/x86/mm/shadow/common.c
+++ b/xen/arch/x86/mm/shadow/common.c
@@ -1298,7 +1298,7 @@ int shadow_set_allocation(struct domain
{
struct page_info *sp;
- ASSERT(paging_locked_by_me(d));
+ ASSERT(paging_locked_by_me(d) || system_state < SYS_STATE_active);
if ( pages > 0 )
{
--- a/xen/arch/x86/pv/dom0_build.c
+++ b/xen/arch/x86/pv/dom0_build.c
@@ -21,6 +21,7 @@
#include <asm/page.h>
#include <asm/pv/mm.h>
#include <asm/setup.h>
+#include <asm/shadow.h>
/* Allow ring-3 access in long mode as guest cannot use ring 1 ... */
#define BASE_PROT (_PAGE_PRESENT|_PAGE_RW|_PAGE_ACCESSED|_PAGE_USER)
@@ -933,7 +934,17 @@ int __init dom0_construct_pv(struct doma
#ifdef CONFIG_SHADOW_PAGING
if ( opt_dom0_shadow )
{
+ bool preempted;
+
printk("Switching dom0 to using shadow paging\n");
+
+ do {
+ preempted = false;
+ shadow_set_allocation(d, dom0_paging_pages(d, nr_pages),
+ &preempted);
+ process_pending_softirqs();
+ } while ( preempted );
+
tasklet_schedule(&d->arch.paging.shadow.pv_l1tf_tasklet);
}
#endif
