.update is used to adjust the next poll time.
Signed-off-by: Yang Zhang <yang.zhang.wz@xxxxxxxxx>
Signed-off-by: Quan Xu <quan.xu0@xxxxxxxxx>
Cc: Jeremy Fitzhardinge <jeremy@xxxxxxxx>
Cc: Chris Wright <chrisw@xxxxxxxxxxxx>
Cc: Alok Kataria <akataria@xxxxxxxxxx>
Cc: Rusty Russell <rusty@xxxxxxxxxxxxxxx>
Cc: Thomas Gleixner <tglx@xxxxxxxxxxxxx>
Cc: Ingo Molnar <mingo@xxxxxxxxxx>
Cc: "H. Peter Anvin" <hpa@xxxxxxxxx>
Cc: x86@xxxxxxxxxx
Cc: Peter Zijlstra <peterz@xxxxxxxxxxxxx>
Cc: Andy Lutomirski <luto@xxxxxxxxxx>
Cc: "Kirill A. Shutemov" <kirill.shutemov@xxxxxxxxxxxxxxx>
Cc: Pan Xinhui <xinhui.pan@xxxxxxxxxxxxxxxxxx>
Cc: Kees Cook <keescook@xxxxxxxxxxxx>
Cc: virtualization@xxxxxxxxxxxxxxxxxxxxxxxxxx
Cc: linux-kernel@xxxxxxxxxxxxxxx
---
arch/x86/include/asm/paravirt.h | 5 +++++
arch/x86/include/asm/paravirt_types.h | 1 +
arch/x86/kernel/paravirt.c | 1 +
3 files changed, 7 insertions(+)
diff --git a/arch/x86/include/asm/paravirt.h b/arch/x86/include/asm/paravirt.h
index 6d46760..32e1c06 100644
--- a/arch/x86/include/asm/paravirt.h
+++ b/arch/x86/include/asm/paravirt.h
@@ -207,6 +207,11 @@ static inline void paravirt_idle_poll(void)
PVOP_VCALL0(pv_idle_ops.poll);
}
+static inline void paravirt_idle_update_poll_duration(unsigned long duration)
+{
+ PVOP_VCALL1(pv_idle_ops.update, duration);
+}
+
static inline void paravirt_alloc_ldt(struct desc_struct *ldt, unsigned entries)
{
PVOP_VCALL2(pv_cpu_ops.alloc_ldt, ldt, entries);
diff --git a/arch/x86/include/asm/paravirt_types.h b/arch/x86/include/asm/paravirt_types.h
index cf45726..3b4f95a 100644
--- a/arch/x86/include/asm/paravirt_types.h
+++ b/arch/x86/include/asm/paravirt_types.h
@@ -326,6 +326,7 @@ struct pv_lock_ops {
struct pv_idle_ops {
void (*poll)(void);
+ void (*update)(unsigned long);
} __no_randomize_layout;
/* This contains all the paravirt structures: we get a convenient
diff --git a/arch/x86/kernel/paravirt.c b/arch/x86/kernel/paravirt.c
index 1b5b247..a11b2c2 100644
--- a/arch/x86/kernel/paravirt.c
+++ b/arch/x86/kernel/paravirt.c
@@ -315,6 +315,7 @@ struct pv_time_ops pv_time_ops = {
struct pv_idle_ops pv_idle_ops = {
.poll = paravirt_nop,
+ .update = paravirt_nop,
};
__visible struct pv_irq_ops pv_irq_ops = {
--
1.8.3.1
--
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