Hi Reinette, On 1/16/2024 1:44 PM, Reinette Chatre wrote:
Hi Babu, On 1/15/2024 2:52 PM, Babu Moger wrote:If the BMEC (Bandwidth Monitoring Event Configuration) feature is supported, the bandwidth events can be configured. The maximum supported bandwidth bitmask can be determined by following CPUID command. CPUID_Fn80000020_ECX_x03 [Platform QoS Monitoring Bandwidth Event Configuration] Read-only. Reset: 0000_007Fh. Bits Description 31:7 Reserved 6:0 Identifies the bandwidth sources that can be tracked. The bandwidth sources can change with the processor generations. Read the supported bandwidth sources using the CPUID command. While at it, move the mask checking to mon_config_write() before iterating over all the domains. Also, print the valid bitmask when the user tries to configure invalid event configuration value. The CPUID details are documented in the PPR listed below [1]. [1] Processor Programming Reference (PPR) Vol 1.1 for AMD Family 19h Model 11h B1 - 55901 Rev 0.25. Fixes: dc2a3e857981 ("x86/resctrl: Add interface to read mbm_total_bytes_config") Signed-off-by: Babu Moger <babu.moger@xxxxxxx> Link: https://bugzilla.kernel.org/show_bug.cgi?id=206537 ---Thank you. Reviewed-by: Reinette Chatre <reinette.chatre@xxxxxxxxx>
Thank you Babu Moger
