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authorJuergen Gross <jgross@suse.com>2018-07-12 18:40:34 +0300
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>2018-07-17 12:39:31 +0300
commit54ca2776fccae337d0538b6b10811476cf669df1 (patch)
tree90e6217455a4b9ef393513930f3d669837464c82 /arch
parentf47f1f976745a9dc9f77c36018a5ff278207be5b (diff)
downloadlinux-54ca2776fccae337d0538b6b10811476cf669df1.tar.xz
xen: setup pv irq ops vector earlier
commit 0ce0bba4e5e0eb9b753bb821785de5d23c494392 upstream. Setting pv_irq_ops for Xen PV domains should be done as early as possible in order to support e.g. very early printk() usage. The same applies to xen_vcpu_info_reset(0), as it is needed for the pv irq ops. Move the call of xen_setup_machphys_mapping() after initializing the pv functions as it contains a WARN_ON(), too. Remove the no longer necessary conditional in xen_init_irq_ops() from PVH V1 times to make clear this is a PV only function. Cc: <stable@vger.kernel.org> # 4.14 Signed-off-by: Juergen Gross <jgross@suse.com> Reviewed-by: Boris Ostrovsky <boris.ostrovsky@oracle.com> Signed-off-by: Juergen Gross <jgross@suse.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'arch')
-rw-r--r--arch/x86/xen/enlighten_pv.c24
-rw-r--r--arch/x86/xen/irq.c4
2 files changed, 12 insertions, 16 deletions
diff --git a/arch/x86/xen/enlighten_pv.c b/arch/x86/xen/enlighten_pv.c
index fcd8789470d1..fd173e6425cc 100644
--- a/arch/x86/xen/enlighten_pv.c
+++ b/arch/x86/xen/enlighten_pv.c
@@ -1230,12 +1230,20 @@ asmlinkage __visible void __init xen_start_kernel(void)
xen_setup_features();
- xen_setup_machphys_mapping();
-
/* Install Xen paravirt ops */
pv_info = xen_info;
pv_init_ops.patch = paravirt_patch_default;
pv_cpu_ops = xen_cpu_ops;
+ xen_init_irq_ops();
+
+ /*
+ * Setup xen_vcpu early because it is needed for
+ * local_irq_disable(), irqs_disabled(), e.g. in printk().
+ *
+ * Don't do the full vcpu_info placement stuff until we have
+ * the cpu_possible_mask and a non-dummy shared_info.
+ */
+ xen_vcpu_info_reset(0);
x86_platform.get_nmi_reason = xen_get_nmi_reason;
@@ -1247,6 +1255,7 @@ asmlinkage __visible void __init xen_start_kernel(void)
* Set up some pagetable state before starting to set any ptes.
*/
+ xen_setup_machphys_mapping();
xen_init_mmu_ops();
/* Prevent unwanted bits from being set in PTEs. */
@@ -1271,20 +1280,9 @@ asmlinkage __visible void __init xen_start_kernel(void)
get_cpu_cap(&boot_cpu_data);
x86_configure_nx();
- xen_init_irq_ops();
-
/* Let's presume PV guests always boot on vCPU with id 0. */
per_cpu(xen_vcpu_id, 0) = 0;
- /*
- * Setup xen_vcpu early because idt_setup_early_handler needs it for
- * local_irq_disable(), irqs_disabled().
- *
- * Don't do the full vcpu_info placement stuff until we have
- * the cpu_possible_mask and a non-dummy shared_info.
- */
- xen_vcpu_info_reset(0);
-
idt_setup_early_handler();
xen_init_capabilities();
diff --git a/arch/x86/xen/irq.c b/arch/x86/xen/irq.c
index 74179852e46c..7515a19fd324 100644
--- a/arch/x86/xen/irq.c
+++ b/arch/x86/xen/irq.c
@@ -128,8 +128,6 @@ static const struct pv_irq_ops xen_irq_ops __initconst = {
void __init xen_init_irq_ops(void)
{
- /* For PVH we use default pv_irq_ops settings. */
- if (!xen_feature(XENFEAT_hvm_callback_vector))
- pv_irq_ops = xen_irq_ops;
+ pv_irq_ops = xen_irq_ops;
x86_init.irqs.intr_init = xen_init_IRQ;
}