[PATCH v2 20/44] cpuidle,intel_idle: Fix CPUIDLE_FLAG_IBRS
From: Peter Zijlstra <peterz@infradead.org>
Date: 2022-09-19 10:21:48
Also in:
linux-acpi, linux-alpha, linux-arch, linux-arm-msm, linux-clk, linux-m68k, linux-mips, linux-omap, linux-perf-users, linux-pm, linux-riscv, linux-s390, linux-sh, linux-tegra, linux-um, lkml, loongarch, sparclinux, virtualization
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@infradead.org> --- arch/x86/kernel/cpu/bugs.c | 2 +- drivers/idle/intel_idle.c | 4 ++-- 2 files changed, 3 insertions(+), 3 deletions(-)
--- a/arch/x86/kernel/cpu/bugs.c
+++ b/arch/x86/kernel/cpu/bugs.c@@ -79,7 +79,7 @@ void write_spec_ctrl_current(u64 val, bo 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); } --- a/drivers/idle/intel_idle.c +++ b/drivers/idle/intel_idle.c
@@ -181,12 +181,12 @@ static __cpuidle int intel_idle_ibrs(str 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; }