tpm_crb: mark command buffer as dirty on request completion

At the moment, there doesn't seems to be any way to know that QEMU
made modification to the command buffer. This is potentially an issue
on Xen while migrating a guest, as modification to the buffer after
the migration as started could be ignored and not transfered to the
destination.

Mark the memory region of the command buffer as dirty once a request
is completed.

Signed-off-by: Anthony PERARD <anthony.perard@citrix.com>
Reviewed-by: Stefan Berger <stefanb@linux.ibm.com>
Signed-off-by: Stefan Berger <stefanb@linux.ibm.com>
Message-id: 20220411144749.47185-1-anthony.perard@citrix.com
This commit is contained in:
Anthony PERARD 2022-04-11 15:47:49 +01:00 committed by Stefan Berger
parent 4d84bb6c8b
commit e37a0ef460
1 changed files with 1 additions and 0 deletions

View File

@ -197,6 +197,7 @@ static void tpm_crb_request_completed(TPMIf *ti, int ret)
ARRAY_FIELD_DP32(s->regs, CRB_CTRL_STS,
tpmSts, 1); /* fatal error */
}
memory_region_set_dirty(&s->cmdmem, 0, CRB_CTRL_CMD_SIZE);
}
static enum TPMVersion tpm_crb_get_version(TPMIf *ti)