Merge tag 'for-linus-5.15b-rc5-tag' of git://git.kernel.org/pub/scm/linux/kernel/git/xen/tip

Pull xen fixes from Juergen Gross:

 - fix two minor issues in the Xen privcmd driver plus a cleanup patch
   for that driver

 - fix multiple issues related to running as PVH guest and some related
   earlyprintk fixes for other Xen guest types

 - fix an issue introduced in 5.15 the Xen balloon driver

* tag 'for-linus-5.15b-rc5-tag' of git://git.kernel.org/pub/scm/linux/kernel/git/xen/tip:
  xen/balloon: fix cancelled balloon action
  xen/x86: adjust data placement
  x86/PVH: adjust function/data placement
  xen/x86: hook up xen_banner() also for PVH
  xen/x86: generalize preferred console model from PV to PVH Dom0
  xen/x86: make "earlyprintk=xen" work for HVM/PVH DomU
  xen/x86: allow "earlyprintk=xen" to work for PV Dom0
  xen/x86: make "earlyprintk=xen" work better for PVH Dom0
  xen/x86: allow PVH Dom0 without XEN_PV=y
  xen/x86: prevent PVH type from getting clobbered
  xen/privcmd: drop "pages" parameter from xen_remap_pfn()
  xen/privcmd: fix error handling in mmap-resource processing
  xen/privcmd: replace kcalloc() by kvcalloc() when allocating empty pages

4 files changed, 31 insertions, 25 deletions

diff --git a/drivers/tty/hvc/hvc_xen.c b/drivers/tty/hvc/hvc_xen.c
index 8f143c09a169..f0bf01ea069a 100644
--- a/drivers/tty/hvc/hvc_xen.c
+++ b/drivers/tty/hvc/hvc_xen.c
@@ -618,10 +618,8 @@ static int __init xenboot_console_setup(struct console *console, char *string)
 {
 	static struct xencons_info xenboot;
 
-	if (xen_initial_domain())
+	if (xen_initial_domain() || !xen_pv_domain())
 		return 0;
-	if (!xen_pv_domain())
-		return -ENODEV;
 
 	return xencons_info_pv_init(&xenboot, 0);
 }
@@ -632,17 +630,16 @@ static void xenboot_write_console(struct console *console, const char *string,
 	unsigned int linelen, off = 0;
 	const char *pos;
 
+	if (dom0_write_console(0, string, len) >= 0)
+		return;
+
 	if (!xen_pv_domain()) {
 		xen_hvm_early_write(0, string, len);
 		return;
 	}
 
-	dom0_write_console(0, string, len);
-
-	if (xen_initial_domain())
+	if (domU_write_console(0, "(early) ", 8) < 0)
 		return;
-
-	domU_write_console(0, "(early) ", 8);
 	while (off < len && NULL != (pos = strchr(string+off, '\n'))) {
 		linelen = pos-string+off;
 		if (off + linelen > len)
diff --git a/drivers/xen/Kconfig b/drivers/xen/Kconfig
index 22f5aff0c136..1b2c3aca6887 100644
--- a/drivers/xen/Kconfig
+++ b/drivers/xen/Kconfig
@@ -241,7 +241,7 @@ config XEN_PRIVCMD
 
 config XEN_ACPI_PROCESSOR
 	tristate "Xen ACPI processor"
-	depends on XEN && XEN_DOM0 && X86 && ACPI_PROCESSOR && CPU_FREQ
+	depends on XEN && XEN_PV_DOM0 && X86 && ACPI_PROCESSOR && CPU_FREQ
 	default m
 	help
 	  This ACPI processor uploads Power Management information to the Xen
@@ -259,7 +259,7 @@ config XEN_ACPI_PROCESSOR
 
 config XEN_MCE_LOG
 	bool "Xen platform mcelog"
-	depends on XEN_DOM0 && X86_MCE
+	depends on XEN_PV_DOM0 && X86_MCE
 	help
 	  Allow kernel fetching MCE error from Xen platform and
 	  converting it into Linux mcelog format for mcelog tools
diff --git a/drivers/xen/balloon.c b/drivers/xen/balloon.c
index 43ebfe36ac27..3a50f097ed3e 100644
--- a/drivers/xen/balloon.c
+++ b/drivers/xen/balloon.c
@@ -491,12 +491,12 @@ static enum bp_state decrease_reservation(unsigned long nr_pages, gfp_t gfp)
 }
 
 /*
- * Stop waiting if either state is not BP_EAGAIN and ballooning action is
- * needed, or if the credit has changed while state is BP_EAGAIN.
+ * Stop waiting if either state is BP_DONE and ballooning action is
+ * needed, or if the credit has changed while state is not BP_DONE.
  */
 static bool balloon_thread_cond(enum bp_state state, long credit)
 {
-	if (state != BP_EAGAIN)
+	if (state == BP_DONE)
 		credit = 0;
 
 	return current_credit() != credit || kthread_should_stop();
@@ -516,10 +516,19 @@ static int balloon_thread(void *unused)
 
 	set_freezable();
 	for (;;) {
-		if (state == BP_EAGAIN)
-			timeout = balloon_stats.schedule_delay * HZ;
-		else
+		switch (state) {
+		case BP_DONE:
+		case BP_ECANCELED:
 			timeout = 3600 * HZ;
+			break;
+		case BP_EAGAIN:
+			timeout = balloon_stats.schedule_delay * HZ;
+			break;
+		case BP_WAIT:
+			timeout = HZ;
+			break;
+		}
+
 		credit = current_credit();
 
 		wait_event_freezable_timeout(balloon_thread_wq,
diff --git a/drivers/xen/privcmd.c b/drivers/xen/privcmd.c
index 720a7b7abd46..3369734108af 100644
--- a/drivers/xen/privcmd.c
+++ b/drivers/xen/privcmd.c
@@ -257,7 +257,7 @@ static long privcmd_ioctl_mmap(struct file *file, void __user *udata)
 	LIST_HEAD(pagelist);
 	struct mmap_gfn_state state;
 
-	/* We only support privcmd_ioctl_mmap_batch for auto translated. */
+	/* We only support privcmd_ioctl_mmap_batch for non-auto-translated. */
 	if (xen_feature(XENFEAT_auto_translated_physmap))
 		return -ENOSYS;
 
@@ -420,7 +420,7 @@ static int alloc_empty_pages(struct vm_area_struct *vma, int numpgs)
 	int rc;
 	struct page **pages;
 
-	pages = kcalloc(numpgs, sizeof(pages[0]), GFP_KERNEL);
+	pages = kvcalloc(numpgs, sizeof(pages[0]), GFP_KERNEL);
 	if (pages == NULL)
 		return -ENOMEM;
 
@@ -428,7 +428,7 @@ static int alloc_empty_pages(struct vm_area_struct *vma, int numpgs)
 	if (rc != 0) {
 		pr_warn("%s Could not alloc %d pfns rc:%d\n", __func__,
 			numpgs, rc);
-		kfree(pages);
+		kvfree(pages);
 		return -ENOMEM;
 	}
 	BUG_ON(vma->vm_private_data != NULL);
@@ -803,21 +803,21 @@ static long privcmd_ioctl_mmap_resource(struct file *file,
 		unsigned int domid =
 			(xdata.flags & XENMEM_rsrc_acq_caller_owned) ?
 			DOMID_SELF : kdata.dom;
-		int num;
+		int num, *errs = (int *)pfns;
 
+		BUILD_BUG_ON(sizeof(*errs) > sizeof(*pfns));
 		num = xen_remap_domain_mfn_array(vma,
 						 kdata.addr & PAGE_MASK,
-						 pfns, kdata.num, (int *)pfns,
+						 pfns, kdata.num, errs,
 						 vma->vm_page_prot,
-						 domid,
-						 vma->vm_private_data);
+						 domid);
 		if (num < 0)
 			rc = num;
 		else if (num != kdata.num) {
 			unsigned int i;
 
 			for (i = 0; i < num; i++) {
-				rc = pfns[i];
+				rc = errs[i];
 				if (rc < 0)
 					break;
 			}
@@ -912,7 +912,7 @@ static void privcmd_close(struct vm_area_struct *vma)
 	else
 		pr_crit("unable to unmap MFN range: leaking %d pages. rc=%d\n",
 			numpgs, rc);
-	kfree(pages);
+	kvfree(pages);
 }
 
 static vm_fault_t privcmd_fault(struct vm_fault *vmf)