6.1-stable review patch. If anyone has any objections, please let me know. ------------------ From: Peter Zijlstra <peterz@xxxxxxxxxxxxx> [ Upstream commit 9b461a6faae7b220c32466261965778b10189e54 ] objtool to the rescue: vmlinux.o: warning: objtool: intel_idle_ibrs+0x17: call to spec_ctrl_current() leaves .noinstr.text section vmlinux.o: warning: objtool: intel_idle_ibrs+0x27: call to wrmsrl.constprop.0() leaves .noinstr.text section Signed-off-by: Peter Zijlstra (Intel) <peterz@xxxxxxxxxxxxx> Signed-off-by: Ingo Molnar <mingo@xxxxxxxxxx> Tested-by: Tony Lindgren <tony@xxxxxxxxxxx> Tested-by: Ulf Hansson <ulf.hansson@xxxxxxxxxx> Acked-by: Rafael J. Wysocki <rafael.j.wysocki@xxxxxxxxx> Acked-by: Frederic Weisbecker <frederic@xxxxxxxxxx> Link: https://lore.kernel.org/r/20230112195540.556912863@xxxxxxxxxxxxx Stable-dep-of: c157d351460b ("intel_idle: Handle older CPUs, which stop the TSC in deeper C states, correctly") Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx> --- arch/x86/kernel/cpu/bugs.c | 2 +- drivers/idle/intel_idle.c | 4 ++-- 2 files changed, 3 insertions(+), 3 deletions(-) diff --git a/arch/x86/kernel/cpu/bugs.c b/arch/x86/kernel/cpu/bugs.c index 03221a060ae77..7d73b53115514 100644 --- a/arch/x86/kernel/cpu/bugs.c +++ b/arch/x86/kernel/cpu/bugs.c @@ -92,7 +92,7 @@ void update_spec_ctrl_cond(u64 val) wrmsrl(MSR_IA32_SPEC_CTRL, val); } -u64 spec_ctrl_current(void) +noinstr u64 spec_ctrl_current(void) { return this_cpu_read(x86_spec_ctrl_current); } diff --git a/drivers/idle/intel_idle.c b/drivers/idle/intel_idle.c index 5d7bbccb52b5e..ae07dc018e666 100644 --- a/drivers/idle/intel_idle.c +++ b/drivers/idle/intel_idle.c @@ -188,12 +188,12 @@ static __cpuidle int intel_idle_ibrs(struct cpuidle_device *dev, int ret; if (smt_active) - wrmsrl(MSR_IA32_SPEC_CTRL, 0); + native_wrmsrl(MSR_IA32_SPEC_CTRL, 0); ret = __intel_idle(dev, drv, index); if (smt_active) - wrmsrl(MSR_IA32_SPEC_CTRL, spec_ctrl); + native_wrmsrl(MSR_IA32_SPEC_CTRL, spec_ctrl); return ret; } -- 2.39.5
