Merge tag 'for-linus-6.15a-rc2-tag' of git://git.kernel.org/pub/scm/linux/kernel/git/xen/tip

Pull xen fixes from Juergen Gross:

 - A simple fix adding the module description of the Xenbus frontend
   module

 - A fix correcting the xen-acpi-processor Kconfig dependency for PVH
   Dom0 support

 - A fix for the Xen balloon driver when running as Xen Dom0 in PVH mode

 - A fix for PVH Dom0 in order to avoid problems with CPU idle and
   frequency drivers conflicting with Xen

* tag 'for-linus-6.15a-rc2-tag' of git://git.kernel.org/pub/scm/linux/kernel/git/xen/tip:
  x86/xen: disable CPU idle and frequency drivers for PVH dom0
  x86/xen: fix balloon target initialization for PVH dom0
  xen: Change xen-acpi-processor dom0 dependency
  xenbus: add module description

1 files changed, 10 insertions, 0 deletions

diff --git a/arch/x86/xen/enlighten.c b/arch/x86/xen/enlighten.c
index 43dcd8c7badc..1b7710bd0d05 100644
--- a/arch/x86/xen/enlighten.c
+++ b/arch/x86/xen/enlighten.c
@@ -70,6 +70,9 @@ EXPORT_SYMBOL(xen_start_flags);
  */
 struct shared_info *HYPERVISOR_shared_info = &xen_dummy_shared_info;
 
+/* Number of pages released from the initial allocation. */
+unsigned long xen_released_pages;
+
 static __ref void xen_get_vendor(void)
 {
 	init_cpu_devs();
@@ -466,6 +469,13 @@ int __init arch_xen_unpopulated_init(struct resource **res)
 			xen_free_unpopulated_pages(1, &pg);
 		}
 
+		/*
+		 * Account for the region being in the physmap but unpopulated.
+		 * The value in xen_released_pages is used by the balloon
+		 * driver to know how much of the physmap is unpopulated and
+		 * set an accurate initial memory target.
+		 */
+		xen_released_pages += xen_extra_mem[i].n_pfns;
 		/* Zero so region is not also added to the balloon driver. */
 		xen_extra_mem[i].n_pfns = 0;
 	}