diff options
| author | Alexey Kardashevskiy <aik@amd.com> | 2026-01-23 16:30:57 +1100 |
|---|---|---|
| committer | Dan Williams <dan.j.williams@intel.com> | 2026-01-30 14:27:53 -0800 |
| commit | c2012263047689e495e81c96d7d5b0586299578d (patch) | |
| tree | f8131de4c3387feb0a364a7bef32c26d7da0c272 /drivers/crypto | |
| parent | 403dd7da22461b0c7fd18d5cd4373b9a1ec8b5f7 (diff) | |
crypto/ccp: Allow multiple streams on the same root bridge
With SEV-TIO the low-level TSM driver is responsible for allocating a
Stream ID. The Stream ID needs to be unique within each IDE partner
port. Fix the Stream ID selection to reuse the host bridge stream
resource id which is a pool of 256 ids per host bridge on AMD platforms.
Otherwise, only one device per-host bridge can establish Selective
Stream IDE.
Fixes: 4be423572da1 ("crypto/ccp: Implement SEV-TIO PCIe IDE (phase1)")
Signed-off-by: Alexey Kardashevskiy <aik@amd.com>
Acked-by: Tom Lendacky <thomas.lendacky@amd.com>
Link: https://patch.msgid.link/20260123053057.1350569-3-aik@amd.com
[djbw: clarify end user impact in changelog]
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
Diffstat (limited to 'drivers/crypto')
| -rw-r--r-- | drivers/crypto/ccp/sev-dev-tsm.c | 3 |
1 files changed, 1 insertions, 2 deletions
diff --git a/drivers/crypto/ccp/sev-dev-tsm.c b/drivers/crypto/ccp/sev-dev-tsm.c index 7407b77c2ef2..40d02adaf3f6 100644 --- a/drivers/crypto/ccp/sev-dev-tsm.c +++ b/drivers/crypto/ccp/sev-dev-tsm.c @@ -198,8 +198,7 @@ static int stream_alloc(struct pci_dev *pdev, struct pci_ide **ide, if (!ide1) return -EFAULT; - /* Blindly assign streamid=0 to TC=0, and so on */ - ide1->stream_id = tc; + ide1->stream_id = ide1->host_bridge_stream; ide[tc] = ide1; |