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Re: [Qemu-devel] [PATCH 0/7] VNVRAM persistent storage
From: |
Anthony Liguori |
Subject: |
Re: [Qemu-devel] [PATCH 0/7] VNVRAM persistent storage |
Date: |
Thu, 23 May 2013 14:15:44 -0500 |
User-agent: |
Notmuch/0.15.2+77~g661dcf8 (http://notmuchmail.org) Emacs/23.3.1 (x86_64-pc-linux-gnu) |
Corey Bryant <address@hidden> writes:
> On 05/23/2013 02:03 PM, Anthony Liguori wrote:
>> Corey Bryant <address@hidden> writes:
>>
> One of the difficulties in virtualizing a TPM is that it doesn't support
> SR-IOV. So the existing passthrough vTPM can only be used by one guest.
> We're planning to provide a software emulated vTPM that uses libtpms
> and it needs to store blobs somewhere that is persistent. We can't
> store blobs in the host TPM's hardware NVRAM. So we have to virtualize
> it in software. And we figured we'd provide a persistent storage
> mechanism that other parts of QEMU could use rather than limit it to
> just the vTPM's use.
I think you are misunderstanding my feedback.
See http://mid.gmane.org/address@hidden
Regards,
Anthony Liguori
>
> --
> Regards,
> Corey Bryant
>
>>>
>>> VNVRAM *vnvram;
>>> int errcode
>>> const VNVRAMEntryName entry_name;
>>> const char *blob_w = "blob data";
>>> char *blob_r;
>>> uint32_t blob_r_size;
>>>
>>> vnvram = vnvram_create("drive-ide0-0-0", false, &errcode);
>>> strcpy((char *)entry_name, "first-entry");
>>> vnvram_register_entry(vnvram, &entry_name, 1024);
>>> vnvram_write_entry(vnvram, &entry_name, (char *)blob_w, strlen(blob_w)+1);
>>> vnvram_read_entry(vnvram, &entry_name, &blob_r, &blob_r_size);
>>> vnvram_delete(vnvram);
>>>
>>> Thanks,
>>> Corey
>>>
>>> Corey Bryant (7):
>>> vnvram: VNVRAM bdrv support
>>> vnvram: VNVRAM in-memory support
>>> vnvram: VNVRAM bottom-half r/w scheduling support
>>> vnvram: VNVRAM internal APIs
>>> vnvram: VNVRAM additional debug support
>>> main: Initialize VNVRAM
>>> monitor: QMP/HMP support for retrieving VNVRAM details
>>>
>>> Makefile.objs | 2 +
>>> hmp.c | 32 ++
>>> hmp.h | 1 +
>>> monitor.c | 7 +
>>> qapi-schema.json | 47 ++
>>> qmp-commands.hx | 41 ++
>>> vl.c | 6 +
>>> vnvram.c | 1254
>>> ++++++++++++++++++++++++++++++++++++++++++++++++++++++
>>> vnvram.h | 36 ++
>>> 9 files changed, 1426 insertions(+), 0 deletions(-)
>>> create mode 100644 vnvram.c
>>> create mode 100644 vnvram.h
>>
>>
- [Qemu-devel] [PATCH 7/7] monitor: QMP/HMP support for retrieving VNVRAM details, (continued)
Re: [Qemu-devel] [PATCH 0/7] VNVRAM persistent storage, Anthony Liguori, 2013/05/23
Re: [Qemu-devel] [PATCH 0/7] VNVRAM persistent storage, Stefan Hajnoczi, 2013/05/24