6.1-stable review patch. If anyone has any objections, please let me know.
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From: Jithu Joseph jithu.joseph@intel.com
[ Upstream commit 72b96ee29ed6f7670bbb180ba694816e33d361d1 ]
Width of chunk related bitfields is ACTIVATE_SCAN and SCAN_STATUS MSRs are different in newer IFS generation compared to gen0.
Make changes to scan test flow such that MSRs are populated appropriately based on the generation supported by hardware.
Account for the 8/16 bit MSR bitfield width differences between gen0 and newer generations for the scan test trace event too.
Signed-off-by: Jithu Joseph jithu.joseph@intel.com Reviewed-by: Tony Luck tony.luck@intel.com Reviewed-by: Ilpo Järvinen ilpo.jarvinen@linux.intel.com Tested-by: Pengfei Xu pengfei.xu@intel.com Link: https://lore.kernel.org/r/20231005195137.3117166-5-jithu.joseph@intel.com Signed-off-by: Ilpo Järvinen ilpo.jarvinen@linux.intel.com Stable-dep-of: 3114f77e9453 ("platform/x86/intel/ifs: Initialize union ifs_status to zero") Signed-off-by: Sasha Levin sashal@kernel.org --- drivers/platform/x86/intel/ifs/ifs.h | 28 ++++++++++++++++++----- drivers/platform/x86/intel/ifs/runtest.c | 29 ++++++++++++++++++------ include/trace/events/intel_ifs.h | 16 ++++++------- 3 files changed, 52 insertions(+), 21 deletions(-)
diff --git a/drivers/platform/x86/intel/ifs/ifs.h b/drivers/platform/x86/intel/ifs/ifs.h index 73c8e91cf144d..1902a1722df1e 100644 --- a/drivers/platform/x86/intel/ifs/ifs.h +++ b/drivers/platform/x86/intel/ifs/ifs.h @@ -157,9 +157,17 @@ union ifs_chunks_auth_status { union ifs_scan { u64 data; struct { - u32 start :8; - u32 stop :8; - u32 rsvd :16; + union { + struct { + u8 start; + u8 stop; + u16 rsvd; + } gen0; + struct { + u16 start; + u16 stop; + } gen2; + }; u32 delay :31; u32 sigmce :1; }; @@ -169,9 +177,17 @@ union ifs_scan { union ifs_status { u64 data; struct { - u32 chunk_num :8; - u32 chunk_stop_index :8; - u32 rsvd1 :16; + union { + struct { + u8 chunk_num; + u8 chunk_stop_index; + u16 rsvd1; + } gen0; + struct { + u16 chunk_num; + u16 chunk_stop_index; + } gen2; + }; u32 error_code :8; u32 rsvd2 :22; u32 control_error :1; diff --git a/drivers/platform/x86/intel/ifs/runtest.c b/drivers/platform/x86/intel/ifs/runtest.c index b2ca2bb4501f6..d6bc2f0b61a34 100644 --- a/drivers/platform/x86/intel/ifs/runtest.c +++ b/drivers/platform/x86/intel/ifs/runtest.c @@ -169,21 +169,31 @@ static void ifs_test_core(int cpu, struct device *dev) union ifs_status status; unsigned long timeout; struct ifs_data *ifsd; + int to_start, to_stop; + int status_chunk; u64 msrvals[2]; int retries;
ifsd = ifs_get_data(dev);
- activate.rsvd = 0; + activate.gen0.rsvd = 0; activate.delay = IFS_THREAD_WAIT; activate.sigmce = 0; - activate.start = 0; - activate.stop = ifsd->valid_chunks - 1; + to_start = 0; + to_stop = ifsd->valid_chunks - 1; + + if (ifsd->generation) { + activate.gen2.start = to_start; + activate.gen2.stop = to_stop; + } else { + activate.gen0.start = to_start; + activate.gen0.stop = to_stop; + }
timeout = jiffies + HZ / 2; retries = MAX_IFS_RETRIES;
- while (activate.start <= activate.stop) { + while (to_start <= to_stop) { if (time_after(jiffies, timeout)) { status.error_code = IFS_SW_TIMEOUT; break; @@ -194,13 +204,14 @@ static void ifs_test_core(int cpu, struct device *dev)
status.data = msrvals[1];
- trace_ifs_status(cpu, activate, status); + trace_ifs_status(cpu, to_start, to_stop, status.data);
/* Some cases can be retried, give up for others */ if (!can_restart(status)) break;
- if (status.chunk_num == activate.start) { + status_chunk = ifsd->generation ? status.gen2.chunk_num : status.gen0.chunk_num; + if (status_chunk == to_start) { /* Check for forward progress */ if (--retries == 0) { if (status.error_code == IFS_NO_ERROR) @@ -209,7 +220,11 @@ static void ifs_test_core(int cpu, struct device *dev) } } else { retries = MAX_IFS_RETRIES; - activate.start = status.chunk_num; + if (ifsd->generation) + activate.gen2.start = status_chunk; + else + activate.gen0.start = status_chunk; + to_start = status_chunk; } }
diff --git a/include/trace/events/intel_ifs.h b/include/trace/events/intel_ifs.h index d7353024016cc..af0af3f1d9b7c 100644 --- a/include/trace/events/intel_ifs.h +++ b/include/trace/events/intel_ifs.h @@ -10,25 +10,25 @@
TRACE_EVENT(ifs_status,
- TP_PROTO(int cpu, union ifs_scan activate, union ifs_status status), + TP_PROTO(int cpu, int start, int stop, u64 status),
- TP_ARGS(cpu, activate, status), + TP_ARGS(cpu, start, stop, status),
TP_STRUCT__entry( __field( u64, status ) __field( int, cpu ) - __field( u8, start ) - __field( u8, stop ) + __field( u16, start ) + __field( u16, stop ) ),
TP_fast_assign( __entry->cpu = cpu; - __entry->start = activate.start; - __entry->stop = activate.stop; - __entry->status = status.data; + __entry->start = start; + __entry->stop = stop; + __entry->status = status; ),
- TP_printk("cpu: %d, start: %.2x, stop: %.2x, status: %llx", + TP_printk("cpu: %d, start: %.4x, stop: %.4x, status: %.16llx", __entry->cpu, __entry->start, __entry->stop,