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tpm_crb: mark command buffer as dirty on request completion

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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
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hw/tpm/tpm_crb.c
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@ -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)