Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
mshv: Add tracepoint for GPA intercept handling
Provide visibility into GPA intercept operations for debugging and
performance analysis of Microsoft Hypervisor guest memory management.
Signed-off-by: Stanislav Kinsburskii <skinsburskii@linux.microsoft.com>
Reviewed-by: Anirudh Rayabharam (Microsoft) <anirudh@anirudhrb.com>
Signed-off-by: Wei Liu <wei.liu@kernel.org>
authored by
Stanislav Kinsburskii
and committed by
Wei Liu
cfc42685
404cd6bf
+33
-2
+4
-2
drivers/hv/mshv_root_main.c
+4
-2
drivers/hv/mshv_root_main.c
···
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region = mshv_partition_region_by_gfn_get(p, gfn);
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if (!region)
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-
return false;
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+
goto out;
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if (access_type == HV_INTERCEPT_ACCESS_WRITE &&
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!(region->hv_map_flags & HV_MAP_GPA_WRITABLE))
···
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put_region:
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mshv_region_put(region);
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-
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+
out:
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+
trace_mshv_handle_gpa_intercept(p->pt_id, vp->vp_index, gfn,
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+
access_type, ret);
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return ret;
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}
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+29
drivers/hv/mshv_trace.h
+29
drivers/hv/mshv_trace.h
···
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#define _MSHV_TRACE_H_
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#include <linux/tracepoint.h>
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+
#include <hyperv/hvhdk.h>
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#undef TRACE_INCLUDE_PATH
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#define TRACE_INCLUDE_PATH ../../drivers/hv
···
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__entry->kicked_by_hv,
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__entry->blocked,
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__entry->irq_pending
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+
)
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);
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+
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TRACE_EVENT(mshv_handle_gpa_intercept,
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TP_PROTO(u64 partition_id, u32 vp_index, u64 gfn, u8 access_type, bool handled),
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TP_ARGS(partition_id, vp_index, gfn, access_type, handled),
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+
TP_STRUCT__entry(
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__field(u64, partition_id)
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__field(u32, vp_index)
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+
__field(u64, gfn)
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+
__field(u8, access_type)
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+
__field(bool, handled)
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+
),
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TP_fast_assign(
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__entry->partition_id = partition_id;
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__entry->vp_index = vp_index;
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+
__entry->gfn = gfn;
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+
__entry->access_type = access_type == HV_INTERCEPT_ACCESS_READ ? 'R' :
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(access_type == HV_INTERCEPT_ACCESS_WRITE ? 'W' :
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(access_type == HV_INTERCEPT_ACCESS_EXECUTE ? 'X' : '?'));
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+
__entry->handled = handled;
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+
),
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+
TP_printk("partition_id=%llu vp_index=%u gfn=0x%llx access_type=%c handled=%d",
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__entry->partition_id,
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+
__entry->vp_index,
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+
__entry->gfn,
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+
__entry->access_type,
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+
__entry->handled
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)
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);
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