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[PULL v1 2/2] tpm_crb: mark command buffer as dirty on request completio
From: |
Stefan Berger |
Subject: |
[PULL v1 2/2] tpm_crb: mark command buffer as dirty on request completion |
Date: |
Tue, 7 Jun 2022 21:00:06 -0400 |
From: Anthony PERARD <anthony.perard@citrix.com>
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
---
hw/tpm/tpm_crb.c | 1 +
1 file changed, 1 insertion(+)
diff --git a/hw/tpm/tpm_crb.c b/hw/tpm/tpm_crb.c
index aa9c00aad3..67db594c48 100644
--- a/hw/tpm/tpm_crb.c
+++ b/hw/tpm/tpm_crb.c
@@ -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)
--
2.35.3