Add tracing for GPA mapping hypercalls to aid in debugging memory management issues in child partitions. The tracepoint captures both successful and failed mapping attempts, including the number of pages successfully mapped before any failure occurred.
Signed-off-by: Stanislav Kinsburskii <[email protected]> --- drivers/hv/mshv_root_hv_call.c | 3 +++ drivers/hv/mshv_trace.h | 36 ++++++++++++++++++++++++++++++++++++ 2 files changed, 39 insertions(+) diff --git a/drivers/hv/mshv_root_hv_call.c b/drivers/hv/mshv_root_hv_call.c index a95f2cfc5da5..7ed623668c8e 100644 --- a/drivers/hv/mshv_root_hv_call.c +++ b/drivers/hv/mshv_root_hv_call.c @@ -260,6 +260,9 @@ static int hv_do_map_pfns(u64 partition_id, u64 gfn, u64 pfns_count, done += completed; } + trace_mshv_map_pfns(partition_id, gfn, pfns_count, page_count, + flags, mmio_spa, done, ret); + if (ret && done) { u32 unmap_flags = 0; diff --git a/drivers/hv/mshv_trace.h b/drivers/hv/mshv_trace.h index 6b8fa477fa3b..efd2b5d4ab73 100644 --- a/drivers/hv/mshv_trace.h +++ b/drivers/hv/mshv_trace.h @@ -538,6 +538,42 @@ TRACE_EVENT(mshv_handle_gpa_intercept, ) ); +TRACE_EVENT(mshv_map_pfns, + TP_PROTO(u64 partition_id, u64 gfn, u64 pfn_count, u64 page_count, u32 flags, + u64 mmio_spa, int done, int ret), + TP_ARGS(partition_id, gfn, pfn_count, page_count, flags, mmio_spa, done, ret), + TP_STRUCT__entry( + __field(u64, partition_id) + __field(u64, gfn) + __field(u64, pfn_count) + __field(u64, page_count) + __field(u32, flags) + __field(u64, mmio_spa) + __field(int, done) + __field(int, ret) + ), + TP_fast_assign( + __entry->partition_id = partition_id; + __entry->gfn = gfn; + __entry->page_count = page_count; + __entry->pfn_count = pfn_count; + __entry->flags = flags; + __entry->mmio_spa = mmio_spa; + __entry->done = done; + __entry->ret = ret; + ), + TP_printk("partition_id=%llu gfn=0x%llx pfn_count=%llu page_count=%llu flags=0x%x mmio_spa=0x%llx done=%d ret=%d", + __entry->partition_id, + __entry->gfn, + __entry->pfn_count, + __entry->page_count, + __entry->flags, + __entry->mmio_spa, + __entry->done, + __entry->ret + ) +); + #endif /* _MSHV_TRACE_H_ */ /* This part must be outside protection */
