[Xen-devel] [PATCH] xen: setup pv irq ops vector earlier

[Juergen Gross <jgross@xxxxxxxx>]

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.

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@xxxxxxxxxxxxxxx> # 4.14
Signed-off-by: Juergen Gross <jgross@xxxxxxxx>
---
 arch/x86/xen/enlighten_pv.c | 3 +--
 arch/x86/xen/irq.c          | 4 +---
 2 files changed, 2 insertions(+), 5 deletions(-)

diff --git a/arch/x86/xen/enlighten_pv.c b/arch/x86/xen/enlighten_pv.c
index 8d4e2e1ae60b..0f4cd9e5bed4 100644
--- a/arch/x86/xen/enlighten_pv.c
+++ b/arch/x86/xen/enlighten_pv.c
@@ -1213,6 +1213,7 @@ asmlinkage __visible void __init xen_start_kernel(void)
        pv_info = xen_info;
        pv_init_ops.patch = paravirt_patch_default;
        pv_cpu_ops = xen_cpu_ops;
+       xen_init_irq_ops();
 
        x86_platform.get_nmi_reason = xen_get_nmi_reason;
 
@@ -1249,8 +1250,6 @@ 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;
 
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;
 }
-- 
2.13.7


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