From: Vikas Shivappa <[email protected]> Updates hot cpu notification handling for code data prioritization(cdp). The capacity bitmask(cbm) is global for both data and instruction and we need to update the new online package with all the cbms by writing to the IA32_L3_QOS_n MSRs.
Signed-off-by: Vikas Shivappa <[email protected]> Signed-off-by: Fenghua Yu <[email protected]> Reviewed-by: Tony Luck <[email protected]> --- arch/x86/kernel/cpu/intel_rdt.c | 27 +++++++++++++++++++++------ 1 file changed, 21 insertions(+), 6 deletions(-) diff --git a/arch/x86/kernel/cpu/intel_rdt.c b/arch/x86/kernel/cpu/intel_rdt.c index 9cee3fe..1bcff29 100644 --- a/arch/x86/kernel/cpu/intel_rdt.c +++ b/arch/x86/kernel/cpu/intel_rdt.c @@ -223,6 +223,26 @@ static inline bool rdt_cpumask_update(int cpu) return false; } +static void cbm_update_msr(u32 index) +{ + struct rdt_remote_data info; + int dindex; + + dindex = DCBM_TABLE_INDEX(index); + if (cctable[dindex].clos_refcnt) { + + info.msr = CBM_FROM_INDEX(dindex); + info.val = cctable[dindex].cbm; + msr_cpu_update((void *) &info); + + if (cdp_enabled) { + info.msr = __ICBM_MSR_INDEX(index); + info.val = cctable[dindex + 1].cbm; + msr_cpu_update((void *) &info); + } + } +} + /* * cbm_update_msrs() - Updates all the existing IA32_L3_MASK_n MSRs * which are one per CLOSid on the current package. @@ -230,15 +250,10 @@ static inline bool rdt_cpumask_update(int cpu) static void cbm_update_msrs(void *dummy) { int maxid = cconfig.max_closid; - struct rdt_remote_data info; unsigned int i; for (i = 0; i < maxid; i++) { - if (cctable[i].clos_refcnt) { - info.msr = CBM_FROM_INDEX(i); - info.val = cctable[i].cbm; - msr_cpu_update((void *) &info); - } + cbm_update_msr(i); } } -- 2.5.0
