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x86/intel_rdt: Add scheduler hook

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Hook the x86 scheduler code to update closid based on whether the current
task is assigned to a specific closid or running on a CPU assigned to a
specific closid.

Signed-off-by: Fenghua Yu <fenghua.yu@intel.com>
Cc: "Ravi V Shankar" <ravi.v.shankar@intel.com>
Cc: "Tony Luck" <tony.luck@intel.com>
Cc: "Shaohua Li" <shli@fb.com>
Cc: "Sai Prakhya" <sai.praneeth.prakhya@intel.com>
Cc: "Peter Zijlstra" <peterz@infradead.org>
Cc: "Stephane Eranian" <eranian@google.com>
Cc: "Dave Hansen" <dave.hansen@intel.com>
Cc: "David Carrillo-Cisneros" <davidcc@google.com>
Cc: "Nilay Vaish" <nilayvaish@gmail.com>
Cc: "Vikas Shivappa" <vikas.shivappa@linux.intel.com>
Cc: "Ingo Molnar" <mingo@elte.hu>
Cc: "Borislav Petkov" <bp@suse.de>
Cc: "H. Peter Anvin" <h.peter.anvin@intel.com>
Link: http://lkml.kernel.org/r/1477692289-37412-10-git-send-email-fenghua.yu@intel.com
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
This commit is contained in:
Fenghua Yu
2016-10-28 15:04:48 -07:00
committed by Thomas Gleixner
parent 60ec2440c6
commit 4f341a5e48
5 changed files with 53 additions and 1 deletions
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4
arch/x86/kernel/process_64.c
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@@ -50,6 +50,7 @@
#include <asm/switch_to.h>
#include <asm/xen/hypervisor.h>
#include <asm/vdso.h>
#include <asm/intel_rdt.h>
__visible DEFINE_PER_CPU(unsigned long, rsp_scratch);
@@ -473,6 +474,9 @@ __switch_to(struct task_struct *prev_p, struct task_struct *next_p)
loadsegment(ss, __KERNEL_DS);
}
/* Load the Intel cache allocation PQR MSR. */
intel_rdt_sched_in();
return prev_p;
}