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Re: [PATCH v2 2/5] Mini-OS: get own domid


On 10/11/2023 11:34, Juergen Gross wrote:
Get the own domid via creation of a temporary event channel. There is
no "official" way to read the own domid in PV guests, so use the event
channel interface to get it:

- allocate an unbound event channel specifying DOMID_SELF for the
   other end

- read the event channel status which will contain the own domid in

- close the event channel

Signed-off-by: Juergen Gross <jgross@xxxxxxxx
- new patch
Signed-off-by: Juergen Gross <jgross@xxxxxxxx>
  events.c         | 32 ++++++++++++++++++++++++++++++++
  include/events.h |  2 ++
  2 files changed, 34 insertions(+)

diff --git a/events.c b/events.c
index cdae90f4..af9f9f9e 100644
--- a/events.c
+++ b/events.c
@@ -261,6 +261,38 @@ int evtchn_get_peercontext(evtchn_port_t local_port, char 
*ctx, int size)
      return rc;
+domid_t evtchn_get_domid(void)
I think the function name should be generic so the caller doesn't need to be modified everytime the implementation is updated.

How about get_domid()?


Julien Grall



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