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Bob reports that VS2017 chokes on a tentative definition of the const
object 'mEfiFileProtocolTemplate', with the following error:
OvmfPkg\QemuKernelLoaderFsDxe\QemuKernelLoaderFsDxe.c(130):
error C2220: warning treated as error - no 'object' file generated
OvmfPkg\QemuKernelLoaderFsDxe\QemuKernelLoaderFsDxe.c(130):
warning C4132: 'mEfiFileProtocolTemplate': const object should be initialized
Let's turn the only function that relies on this tentative definition
into a forward declaration itself, and move its definition after the
external definition of the object. That allows us to drop the tentative
definition of the const object, and hopefully make VS2017 happy.
Cc: "Feng, Bob C" <bob.c.feng@intel.com>
Signed-off-by: Ard Biesheuvel <ard.biesheuvel@linaro.org>
Reviewed-by: Laszlo Ersek <lersek@redhat.com>
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Linux v5.7 will introduce a new method to load the initial ramdisk
(initrd) from the loader, using the LoadFile2 protocol installed on a
special vendor GUIDed media device path.
Add support for this to our QEMU command line kernel/initrd loader.
Ref: https://bugzilla.tianocore.org/show_bug.cgi?id=2566
Signed-off-by: Ard Biesheuvel <ard.biesheuvel@linaro.org>
Reviewed-by: Laszlo Ersek <lersek@redhat.com>
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On x86, the kernel image consists of a setup block and the actual kernel,
and QEMU presents these as separate blobs, whereas on disk (and in terms
of PE/COFF image signing), they consist of a single image.
So add support to our FS loader driver to expose files via the abstract
file system that consist of up to two concatenated blobs, and redefine
the kernel file so it consists of the setup and kernel blobs, on every
architecture (on non-x86, the setup block is simply 0 bytes and is
therefore ignored implicitly)
Ref: https://bugzilla.tianocore.org/show_bug.cgi?id=2566
Signed-off-by: Ard Biesheuvel <ard.biesheuvel@linaro.org>
Reviewed-by: Laszlo Ersek <lersek@redhat.com>
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We have no need for exposing the kernel command line as a file,
so remove support for that. Since the remaining blobs (kernel
and initrd) are typically much larger than a page, switch to
the page based allocator for blobs at the same time.
Ref: https://bugzilla.tianocore.org/show_bug.cgi?id=2566
Signed-off-by: Ard Biesheuvel <ard.biesheuvel@linaro.org>
Reviewed-by: Laszlo Ersek <lersek@redhat.com>
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Expose the existing implementation of an abstract filesystem exposing
the blobs passed to QEMU via the command line via a standalone DXE
driver.
Notable difference with the original code is the switch to a new vendor
GUIDed media device path, as opposed to a vendor GUID hardware device
path, which is not entirely appropriate for pure software constructs.
Since we are using the GetTime() runtime service in a DXE_DRIVER type
module, we need to DEPEX explicitly on gEfiRealTimeClockArchProtocolGuid.
Ref: https://bugzilla.tianocore.org/show_bug.cgi?id=2566
Signed-off-by: Ard Biesheuvel <ard.biesheuvel@linaro.org>
Reviewed-by: Laszlo Ersek <lersek@redhat.com>
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