This is a note to let you know that I've just added the patch titled
x86/xen: Fix noinstr fail in xen_pv_evtchn_do_upcall()
to the 5.12-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
x86-xen-fix-noinstr-fail-in-xen_pv_evtchn_do_upcall.patch
and it can be found in the queue-5.12 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
commit e3cc00c50618d188dcc71157f9e96d5a7c7ec50f
Author: Peter Zijlstra <peterz@xxxxxxxxxxxxx>
Date: Mon Jun 21 13:12:35 2021 +0200
x86/xen: Fix noinstr fail in xen_pv_evtchn_do_upcall()
[ Upstream commit 84e60065df9ef03759115a7e48c04bbc0d292165 ]
Fix:
vmlinux.o: warning: objtool: xen_pv_evtchn_do_upcall()+0x23: call to irq_enter_rcu() leaves .noinstr.text section
Fixes: 359f01d1816f ("x86/entry: Use run_sysvec_on_irqstack_cond() for XEN upcall")
Signed-off-by: Peter Zijlstra (Intel) <peterz@xxxxxxxxxxxxx>
Signed-off-by: Ingo Molnar <mingo@xxxxxxxxxx>
Link: https://lore.kernel.org/r/20210621120120.532960208@xxxxxxxxxxxxx
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
diff --git a/arch/x86/entry/common.c b/arch/x86/entry/common.c
index cbe19c87e6be..8767dc53b569 100644
--- a/arch/x86/entry/common.c
+++ b/arch/x86/entry/common.c
@@ -266,15 +266,16 @@ __visible noinstr void xen_pv_evtchn_do_upcall(struct pt_regs *regs)
irqentry_state_t state = irqentry_enter(regs);
bool inhcall;
+ instrumentation_begin();
run_sysvec_on_irqstack_cond(__xen_pv_evtchn_do_upcall, regs);
inhcall = get_and_clear_inhcall();
if (inhcall && !WARN_ON_ONCE(state.exit_rcu)) {
- instrumentation_begin();
irqentry_exit_cond_resched();
instrumentation_end();
restore_inhcall(inhcall);
} else {
+ instrumentation_end();
irqentry_exit(regs, state);
}
}
