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feat(core/remio): add Remote I/O infrastructure #176

Merged
merged 7 commits into from
Nov 5, 2024
Merged

feat(core/remio): add Remote I/O infrastructure #176

merged 7 commits into from
Nov 5, 2024

Commits on Nov 5, 2024

  1. ref(core/hypercall): rename first argument 

    This commit renames the first argument of the hypercall to make
the code independent of the specific hypercall type.

Signed-off-by: João Peixoto <[email protected]>
    @joaopeixoto13
    joaopeixoto13 committed Nov 5, 2024
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  2. feat(inc/hypercall): introduce arch-specific hypercall in/out convention 

    This commit introduces a separation of input and output conventions for
hypercalls, addressing architecture-specific differences between ARM
and RISC-V. On ARM, the x0 register is used to pass both the extid,
fid, and the return value, while additional parameters (hypercalls arguments)
are passed via registers x1 to xn. On RISC-V, while the return value is
passed in a0, the extid and fid are handled by the a7 and a6 registers,
respectively. This means that the hypercall input arguments on RISC-V
should be passed through registers a0 to a5, while output hypercall
arguments are passed via a2 and onward (because all registers except
a0 and a1 must be preserved across an SBI call by the callee).
To accommodate these differences and provide a uniform interface,
two macros were introduced to abstract the handling of input and output
hypercall arguments across architectures.

Signed-off-by: João Peixoto <[email protected]>
    @joaopeixoto13
    joaopeixoto13 committed Nov 5, 2024
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  3. feat(inc/hypercall): add generic hypercall get/set argument methods 

    This commit introduces two methods for setting and retrieving hypercall
arguments, allowing each hypercall implementation to flexibly manage its
specific arguments as needed.

Signed-off-by: João Peixoto <[email protected]>
    @joaopeixoto13
    joaopeixoto13 committed Nov 5, 2024
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  4. ref(riscv/sync_exceptions): use vcpu_writepc method 

    Refactored the vCPU program counter incrementation by introducing
the architecture-agnostic method vcpu_writepc, aligning the
implementation with the approach used in the ARM architecture.

Signed-off-by: João Peixoto <[email protected]>
    @joaopeixoto13
    joaopeixoto13 committed Nov 5, 2024
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  5. feat(arch/exception_handler): enable exception handlers to suspend vCPU 

    Implemented support for abort and exception handlers to suspend the
current vCPU based on the vCPU active flag.

Signed-off-by: João Peixoto <[email protected]>
    @joaopeixoto13
    joaopeixoto13 committed Nov 5, 2024
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  6. feat(core/objpool): add objpool_alloc_with_id and objpool_get_by_id 

    This commit introduces two new methods to the objpool API.
The first method, objpool_alloc_with_id, enables the allocation of an
object within a pool and returns the index where the object was allocated.
The second method, objpool_get_by_id, allows retrieving a previously
allocated object using the index of the pool where it was initially allocated.

Signed-off-by: João Peixoto <[email protected]>
    @joaopeixoto13
    joaopeixoto13 committed Nov 5, 2024
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  7. feat(core/remio): add Remote I/O infrastructure 

    This commit introduces the foundational support for VirtIO by implementing
a mechanism to forward VirtIO requests bidirectionally between the
guest VM (or frontend VM) and its associated backend VM.

Signed-off-by: João Peixoto <[email protected]>
    @joaopeixoto13
    joaopeixoto13 committed Nov 5, 2024
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