[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index] [Xen-devel] [PATCH v10 0/6] x86/ioreq server: Introduce HVMMEM_ioreq_server mem type.
XenGT leverages ioreq server to track and forward the accesses to GPU I/O resources, e.g. the PPGTT(per-process graphic translation tables). Currently, ioreq server uses rangeset to track the BDF/ PIO/MMIO ranges to be emulated. To select an ioreq server, the rangeset is searched to see if the I/O range is recorded. However, number of ram pages to be tracked may exceed the upper limit of rangeset. Previously, one solution was proposed to refactor the rangeset, and extend its upper limit. However, after 12 rounds discussion, we have decided to drop this approach due to security concerns. Now this new patch series introduces a new mem type, HVMMEM_ioreq_server, and added hvm operations to let one ioreq server to claim its ownership of ram pages with this type. Accesses to a page of this type will be handled by the specified ioreq server directly. Yu Zhang (6): x86/ioreq server: Release the p2m lock after mmio is handled. x86/ioreq server: Add DMOP to map guest ram with p2m_ioreq_server to an ioreq server. x86/ioreq server: Add device model wrappers for new DMOP x86/ioreq server: Handle read-modify-write cases for p2m_ioreq_server pages. x86/ioreq server: Asynchronously reset outstanding p2m_ioreq_server entries. x86/ioreq server: Synchronously reset outstanding p2m_ioreq_server entries when an ioreq server unmaps. tools/libs/devicemodel/core.c | 25 +++++ tools/libs/devicemodel/include/xendevicemodel.h | 18 ++++ tools/libs/devicemodel/libxendevicemodel.map | 1 + tools/libxc/include/xenctrl_compat.h | 5 + tools/libxc/xc_devicemodel_compat.c | 17 ++++ xen/arch/x86/hvm/dm.c | 70 +++++++++++++- xen/arch/x86/hvm/emulate.c | 95 ++++++++++++++++++- xen/arch/x86/hvm/hvm.c | 7 +- xen/arch/x86/hvm/ioreq.c | 52 +++++++++++ xen/arch/x86/mm/hap/hap.c | 9 ++ xen/arch/x86/mm/p2m-ept.c | 16 +++- xen/arch/x86/mm/p2m-pt.c | 32 +++++-- xen/arch/x86/mm/p2m.c | 116 ++++++++++++++++++++++++ xen/arch/x86/mm/shadow/multi.c | 3 +- xen/include/asm-x86/hvm/ioreq.h | 2 + xen/include/asm-x86/p2m.h | 40 +++++++- xen/include/public/hvm/dm_op.h | 28 ++++++ xen/include/public/hvm/hvm_op.h | 8 +- 18 files changed, 515 insertions(+), 29 deletions(-) -- 1.9.1 _______________________________________________ Xen-devel mailing list Xen-devel@xxxxxxxxxxxxx https://lists.xen.org/xen-devel
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