diff options
Diffstat (limited to 'arch/x86/kernel/cpu/intel_rdt.c')
| -rw-r--r-- | arch/x86/kernel/cpu/intel_rdt.c | 37 |
1 files changed, 27 insertions, 10 deletions
diff --git a/arch/x86/kernel/cpu/intel_rdt.c b/arch/x86/kernel/cpu/intel_rdt.c index 53ee6838c496..8c09e9db2fc6 100644 --- a/arch/x86/kernel/cpu/intel_rdt.c +++ b/arch/x86/kernel/cpu/intel_rdt.c @@ -35,6 +35,7 @@ #define MAX_MBA_BW 100u #define MBA_IS_LINEAR 0x4 +#define MBA_MAX_MBPS U32_MAX /* Mutex to protect rdtgroup access. */ DEFINE_MUTEX(rdtgroup_mutex); @@ -439,25 +440,40 @@ struct rdt_domain *rdt_find_domain(struct rdt_resource *r, int id, return NULL; } +void setup_default_ctrlval(struct rdt_resource *r, u32 *dc, u32 *dm) +{ + int i; + + /* + * Initialize the Control MSRs to having no control. + * For Cache Allocation: Set all bits in cbm + * For Memory Allocation: Set b/w requested to 100% + * and the bandwidth in MBps to U32_MAX + */ + for (i = 0; i < r->num_closid; i++, dc++, dm++) { + *dc = r->default_ctrl; + *dm = MBA_MAX_MBPS; + } +} + static int domain_setup_ctrlval(struct rdt_resource *r, struct rdt_domain *d) { struct msr_param m; - u32 *dc; - int i; + u32 *dc, *dm; dc = kmalloc_array(r->num_closid, sizeof(*d->ctrl_val), GFP_KERNEL); if (!dc) return -ENOMEM; - d->ctrl_val = dc; + dm = kmalloc_array(r->num_closid, sizeof(*d->mbps_val), GFP_KERNEL); + if (!dm) { + kfree(dc); + return -ENOMEM; + } - /* - * Initialize the Control MSRs to having no control. - * For Cache Allocation: Set all bits in cbm - * For Memory Allocation: Set b/w requested to 100 - */ - for (i = 0; i < r->num_closid; i++, dc++) - *dc = r->default_ctrl; + d->ctrl_val = dc; + d->mbps_val = dm; + setup_default_ctrlval(r, dc, dm); m.low = 0; m.high = r->num_closid; @@ -596,6 +612,7 @@ static void domain_remove_cpu(int cpu, struct rdt_resource *r) } kfree(d->ctrl_val); + kfree(d->mbps_val); kfree(d->rmid_busy_llc); kfree(d->mbm_total); kfree(d->mbm_local); |