[v3] riscv: QEMU RISC-V IOMMU Support

[PATCH v3 01/13] exec/memtxattr: add process identifier to the transaction attributes

Daniel Henrique Barboza posted 13 patches 6 months ago

Diff against v2 v4 v5 v6 v7 v8 v9
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Maintainers: "Michael S. Tsirkin" <mst@redhat.com>, Marcel Apfelbaum <marcel.apfelbaum@gmail.com>, Paolo Bonzini <pbonzini@redhat.com>, Palmer Dabbelt <palmer@dabbelt.com>, Alistair Francis <alistair.francis@wdc.com>, Bin Meng <bmeng.cn@gmail.com>, Weiwei Li <liwei1518@gmail.com>, Daniel Henrique Barboza <dbarboza@ventanamicro.com>, Liu Zhiwei <zhiwei_liu@linux.alibaba.com>, "Marc-André Lureau" <marcandre.lureau@redhat.com>, "Daniel P. Berrangé" <berrange@redhat.com>, Thomas Huth <thuth@redhat.com>, "Philippe Mathieu-Daudé" <philmd@linaro.org>, Laurent Vivier <lvivier@redhat.com>

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[PATCH v3 01/13] exec/memtxattr: add process identifier to the transaction attributes

Posted by Daniel Henrique Barboza 6 months ago

From: Tomasz Jeznach <tjeznach@rivosinc.com>

Extend memory transaction attributes with process identifier to allow
per-request address translation logic to use requester_id / process_id
to identify memory mapping (e.g. enabling IOMMU w/ PASID translations).

Signed-off-by: Tomasz Jeznach <tjeznach@rivosinc.com>
Reviewed-by: Frank Chang <frank.chang@sifive.com>
---
 include/exec/memattrs.h | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/include/exec/memattrs.h b/include/exec/memattrs.h
index 14cdd8d582..46d0725416 100644
--- a/include/exec/memattrs.h
+++ b/include/exec/memattrs.h
@@ -52,6 +52,11 @@ typedef struct MemTxAttrs {
     unsigned int memory:1;
     /* Requester ID (for MSI for example) */
     unsigned int requester_id:16;
+
+    /*
+     * PCI PASID support: Limited to 8 bits process identifier.
+     */
+    unsigned int pasid:8;
 } MemTxAttrs;
 
 /* Bus masters which don't specify any attributes will get this,
-- 
2.44.0