From: Stefan Berger <stefanb@linux.vnet.ibm.com>
To: qemu-ppc@nongnu.org
Cc: marcandre.lureau@redhat.com,
Stefan Berger <stefanb@linux.vnet.ibm.com>,
qemu-devel@nongnu.org, david@gibson.dropbear.id.au
Subject: [PACTH v3 3/5] tpm_spapr: Support suspend and resume
Date: Wed, 11 Dec 2019 11:20:48 -0500 [thread overview]
Message-ID: <20191211162050.970199-4-stefanb@linux.vnet.ibm.com> (raw)
In-Reply-To: <20191211162050.970199-1-stefanb@linux.vnet.ibm.com>
Extend the tpm_spapr frontend with VM suspend and resume support.
Signed-off-by: Stefan Berger <stefanb@linux.vnet.ibm.com>
---
hw/tpm/tpm_spapr.c | 42 +++++++++++++++++++++++++++++++++++++++++-
1 file changed, 41 insertions(+), 1 deletion(-)
diff --git a/hw/tpm/tpm_spapr.c b/hw/tpm/tpm_spapr.c
index c4a67e2403..d9153bd95c 100644
--- a/hw/tpm/tpm_spapr.c
+++ b/hw/tpm/tpm_spapr.c
@@ -87,6 +87,8 @@ typedef struct {
TPMVersion be_tpm_version;
size_t be_buffer_size;
+
+ bool deliver_response; /* whether to deliver response after VM resume */
} SPAPRvTPMState;
static void tpm_spapr_show_buffer(const unsigned char *buffer,
@@ -339,9 +341,47 @@ static enum TPMVersion tpm_spapr_get_version(TPMIf *ti)
return tpm_backend_get_tpm_version(s->be_driver);
}
+/* persistent state handling */
+
+static int tpm_spapr_pre_save(void *opaque)
+{
+ SPAPRvTPMState *s = opaque;
+
+ s->deliver_response = tpm_backend_finish_sync(s->be_driver);
+ /*
+ * we cannot deliver the results to the VM since DMA would touch VM memory
+ */
+
+ return 0;
+}
+
+static int tpm_spapr_post_load(void *opaque, int version_id)
+{
+ SPAPRvTPMState *s = opaque;
+
+ if (s->deliver_response) {
+ /* deliver the results to the VM via DMA */
+ tpm_spapr_request_completed(TPM_IF(s), 0);
+ }
+
+ return 0;
+}
+
static const VMStateDescription vmstate_spapr_vtpm = {
.name = "tpm-spapr",
- .unmigratable = 1,
+ .version_id = 1,
+ .minimum_version_id = 0,
+ .minimum_version_id_old = 0,
+ .pre_save = tpm_spapr_pre_save,
+ .post_load = tpm_spapr_post_load,
+ .fields = (VMStateField[]) {
+ VMSTATE_SPAPR_VIO(vdev, SPAPRvTPMState),
+
+ VMSTATE_UINT8(state, SPAPRvTPMState),
+ VMSTATE_BUFFER(buffer, SPAPRvTPMState),
+ VMSTATE_BOOL(deliver_response, SPAPRvTPMState),
+ VMSTATE_END_OF_LIST(),
+ }
};
static Property tpm_spapr_properties[] = {
--
2.21.0
next prev parent reply other threads:[~2019-12-11 16:27 UTC|newest]
Thread overview: 12+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-12-11 16:20 [PACTH v3 0/5] Add vTPM emulator supportfor ppc64 platform Stefan Berger
2019-12-11 16:20 ` [PACTH v3 1/5] tpm_spapr: Support TPM for ppc64 using CRQ based interface Stefan Berger
2019-12-12 11:05 ` Marc-André Lureau
2019-12-12 12:59 ` Stefan Berger
2019-12-11 16:20 ` [PACTH v3 2/5] tpm: Return bool from tpm_backend_finish_sync Stefan Berger
2019-12-11 16:20 ` Stefan Berger [this message]
2019-12-12 11:00 ` [PACTH v3 3/5] tpm_spapr: Support suspend and resume Marc-André Lureau
2019-12-12 13:22 ` Stefan Berger
2019-12-12 17:12 ` Stefan Berger
2019-12-11 16:20 ` [PACTH v3 4/5] hw/ppc/Kconfig: Enable TPMDEV as part of PSERIES config Stefan Berger
2019-12-11 16:20 ` [PACTH v3 5/5] docs: tpm: Add example command line for ppc64 and tpm-spapr Stefan Berger
2019-12-12 11:11 ` Marc-André Lureau
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