OvmfPkg/VirtioLib: alloc VRING buffer with AllocateSharedPages()
The VRING buffer is a communication area between guest and hypervisor. Allocate it using VIRTIO_DEVICE_PROTOCOL.AllocateSharedPages() so that it can be mapped later with VirtioRingMap() for bi-directional access. Cc: Ard Biesheuvel <ard.biesheuvel@linaro.org> Cc: Jordan Justen <jordan.l.justen@intel.com> Cc: Tom Lendacky <thomas.lendacky@amd.com> Cc: Laszlo Ersek <lersek@redhat.com> Contributed-under: TianoCore Contribution Agreement 1.1 Signed-off-by: Brijesh Singh <brijesh.singh@amd.com> [lersek@redhat.com: correct typo in VirtioRingInit() comment blocks] Reviewed-by: Laszlo Ersek <lersek@redhat.com> Regression-tested-by: Laszlo Ersek <lersek@redhat.com>
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Laszlo Ersek
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@@ -42,9 +42,8 @@
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@param[out] Ring The virtio ring to set up.
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@retval EFI_OUT_OF_RESOURCES AllocatePages() failed to allocate contiguous
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pages for the requested QueueSize. Fields of
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Ring have indeterminate value.
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@return Status codes propagated from
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VirtIo->AllocateSharedPages().
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@retval EFI_SUCCESS Allocation and setup successful. Ring->Base
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(and nothing else) is responsible for
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