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The recent patch
OvmfPkg: Make the VirtIo devices use the new VIRTIO_DEVICE_PROTOCOL
was fixed up at commit time, in order to silence warnings issued by the
Visual Studio compiler. Differences between the posted and committed
patch:
> diff --git a/OvmfPkg/VirtioBlkDxe/VirtioBlk.c b/OvmfPkg/VirtioBlkDxe/VirtioBlk.c
> -index 17b9f71..96a0d9f 100644
> +index 17b9f71..f09b0d1 100644
> --- a/OvmfPkg/VirtioBlkDxe/VirtioBlk.c
> +++ b/OvmfPkg/VirtioBlkDxe/VirtioBlk.c
> @@ -23,7 +23,6 @@
> @@ -994,7 +998,7 @@
> + // step 4c -- Report GPFN (guest-physical frame number) of queue.
> + //
> + Status = Dev->VirtIo->SetQueueAddress (Dev->VirtIo,
> -+ (UINTN) Dev->Ring.Base >> EFI_PAGE_SHIFT);
> ++ (UINT32)(UINTN) Dev->Ring.Base >> EFI_PAGE_SHIFT);
> + if (EFI_ERROR (Status)) {
> + goto ReleaseQueue;
> + }
> @@ -1495,7 +1499,7 @@
> goto Exit;
> }
> diff --git a/OvmfPkg/VirtioNetDxe/SnpInitialize.c b/OvmfPkg/VirtioNetDxe/SnpInitialize.c
> -index 6cee014..8dcf9da 100644
> +index 6cee014..4203fbd 100644
> --- a/OvmfPkg/VirtioNetDxe/SnpInitialize.c
> +++ b/OvmfPkg/VirtioNetDxe/SnpInitialize.c
> @@ -57,14 +57,15 @@ VirtioNetInitRing (
> @@ -1539,7 +1543,7 @@
> - Status = VIRTIO_CFG_WRITE (Dev, Generic.VhdrQueueAddress,
> - (UINTN) Ring->Base >> EFI_PAGE_SHIFT);
> + Status = Dev->VirtIo->SetQueueAddress (Dev->VirtIo,
> -+ (UINTN) Ring->Base >> EFI_PAGE_SHIFT);
> ++ (UINT32)(UINTN) Ring->Base >> EFI_PAGE_SHIFT);
> if (EFI_ERROR (Status)) {
> - VirtioRingUninit (Ring);
> + goto ReleaseQueue;
> @@ -1721,7 +1725,7 @@
> Exit:
> gBS->RestoreTPL (OldTpl);
> diff --git a/OvmfPkg/VirtioScsiDxe/VirtioScsi.c b/OvmfPkg/VirtioScsiDxe/VirtioScsi.c
> -index b836fb3..bcec676 100644
> +index b836fb3..2223c9c 100644
> --- a/OvmfPkg/VirtioScsiDxe/VirtioScsi.c
> +++ b/OvmfPkg/VirtioScsiDxe/VirtioScsi.c
> @@ -38,7 +38,6 @@
> @@ -1908,7 +1912,7 @@
> + // step 4c -- Report GPFN (guest-physical frame number) of queue.
> + //
> + Status = Dev->VirtIo->SetQueueAddress (Dev->VirtIo,
> -+ (UINTN) Dev->Ring.Base >> EFI_PAGE_SHIFT);
> ++ (UINT32)(UINTN) Dev->Ring.Base >> EFI_PAGE_SHIFT);
> if (EFI_ERROR (Status)) {
> goto ReleaseQueue;
> }
These casts are incorrect -- they throw away address bits >=32 before
shifting, which can break the drivers in guests with more than 4GB RAM.
The bug is clearly an artifact of the edk2 coding style, which requires
cast expressions to be written as
(type) expression
rather than the usual
(type)expression
The latter correctly reflects that casts have one of the strongest
bindings in C. The former actively obscures that fact. Cf.
(type) expr1 >> expr2
vs.
(type)expr1 >> expr2
Make sure we shift before we truncate.
Contributed-under: TianoCore Contribution Agreement 1.0
Signed-off-by: Laszlo Ersek <lersek@redhat.com>
Reviewed-by: Jordan Justen <jordan.l.justen@intel.com>
git-svn-id: https://svn.code.sf.net/p/edk2/code/trunk/edk2@14970 6f19259b-4bc3-4df7-8a09-765794883524
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These functions did not provide much more than the new protocol functions
VIRTIO_DEVICE_PROTOCOL.ReadDevice() / VIRTIO_DEVICE_PROTOCOL.WriteDevice().
Contributed-under: TianoCore Contribution Agreement 1.0
Signed-off-by: Olivier Martin <olivier.martin@arm.com>
Reviewed-by: Jordan Justen <jordan.l.justen@intel.com>
Signed-off-by: Laszlo Ersek <lersek@redhat.com>
git-svn-id: https://svn.code.sf.net/p/edk2/code/trunk/edk2@14968 6f19259b-4bc3-4df7-8a09-765794883524
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This change replaces the accesses to the PCI bus from the Block, Scsi and Net drivers by
the use of the new VIRTIO_DEVICE_PROTOCOL protocol that abstracts the transport layer.
It means these drivers can be used on PCI and MMIO transport layer.
Contributed-under: TianoCore Contribution Agreement 1.0
Signed-off-by: Olivier Martin <olivier.martin@arm.com>
v5:
- VirtioFlush(): update comment block in VirtioLib.[hc]; error code is
propagated from VirtIo->SetQueueNotify().
- VirtioBlkInit(): jump to Failed label if SetPageSize() fails
- VirtioBlkInit(): fixup comment, and add error handling, near
SetQueueNum() call
- VirtioBlkDriverBindingStart(): remove redundant (always false) check for
a subsystem device ID different from VIRTIO_SUBSYSTEM_BLOCK_DEVICE;
VirtioBlkDriverBindingSupported() handles it already
- VirtioNetGetFeatures(): update stale comment block
- VirtioNetGetFeatures(): retrieve MAC address byte for byte (open-coded
loop)
- VirtioNetDriverBindingStart(): remove redundant (always false) check for
a subsystem device ID different from VIRTIO_SUBSYSTEM_NETWORK_CARD;
VirtioNetDriverBindingSupported() handles it already
- VirtioNetInitRing(): call SetQueueNum() and SetQueueAlign() for proper
MMIO operation
- VirtioNetInitialize(): fix destination error label for when
SetPageSize() fails
- VirtioScsi.c: fix comment block of VIRTIO_CFG_WRITE()/VIRTIO_CFG_READ()
- VirtioScsiInit(): fix destination error label for when SetPageSize()
fails
- VirtioScsiInit(): call SetQueueNum() and SetQueueAlign() for proper MMIO
operation
Contributed-under: TianoCore Contribution Agreement 1.0
Signed-off-by: Laszlo Ersek <lersek@redhat.com>
Reviewed-by: Jordan Justen <jordan.l.justen@intel.com>
git-svn-id: https://svn.code.sf.net/p/edk2/code/trunk/edk2@14966 6f19259b-4bc3-4df7-8a09-765794883524
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drivers
Contributed-under: TianoCore Contribution Agreement 1.0
Signed-off-by: Olivier Martin <olivier.martin@arm.com>
Reviewed-by: Jordan Justen <jordan.l.justen@intel.com>
git-svn-id: https://svn.code.sf.net/p/edk2/code/trunk/edk2@14742 6f19259b-4bc3-4df7-8a09-765794883524
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Structures should not be directly assigned in EDK II
code, since this leads to different behaviours on various
compilers.
Instead, use ZeroMem to zero out the structures.
Contributed-under: TianoCore Contribution Agreement 1.0
Signed-off-by: Jordan Justen <jordan.l.justen@intel.com>
Reviewed-by: Laszlo Ersek <lersek@redhat.com>
git-svn-id: https://edk2.svn.sourceforge.net/svnroot/edk2/trunk/edk2@13878 6f19259b-4bc3-4df7-8a09-765794883524
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Contributed-under: TianoCore Contribution Agreement 1.0
Signed-off-by: Laszlo Ersek <lersek@redhat.com>
Reviewed-by: Jordan Justen <jordan.l.justen@intel.com>
[jordan.l.justen@intel.com: fix build for VS2012]
Contributed-under: TianoCore Contribution Agreement 1.0
Signed-off-by: Jordan Justen <jordan.l.justen@intel.com>
git-svn-id: https://edk2.svn.sourceforge.net/svnroot/edk2/trunk/edk2@13867 6f19259b-4bc3-4df7-8a09-765794883524
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