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Subject[PATCH v4 3/4] intel_idle: Use __update_spec_ctrl() in intel_idle_ibrs()
Date
When intel_idle_ibrs() is called, it modifies the SPEC_CTRL MSR to 0
in order disable IBRS. However, the new MSR value isn't reflected in
x86_spec_ctrl_current which is at odd with the other code that keep track
of its state in that percpu variable. Use the new __update_spec_ctrl()
to have the x86_spec_ctrl_current percpu value properly updated.

Signed-off-by: Waiman Long <longman@redhat.com>
---
drivers/idle/intel_idle.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/idle/intel_idle.c b/drivers/idle/intel_idle.c
index 34201d7ef33e..e32ff09051af 100644
--- a/drivers/idle/intel_idle.c
+++ b/drivers/idle/intel_idle.c
@@ -182,12 +182,12 @@ static __cpuidle int intel_idle_ibrs(struct cpuidle_device *dev,
int ret;

if (smt_active)
- native_wrmsrl(MSR_IA32_SPEC_CTRL, 0);
+ __update_spec_ctrl(0);

ret = __intel_idle(dev, drv, index);

if (smt_active)
- native_wrmsrl(MSR_IA32_SPEC_CTRL, spec_ctrl);
+ __update_spec_ctrl(spec_ctrl);

return ret;
}
--
2.31.1
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