similar to: [PATCH] Eliminate kernel version checks from i386/kernel/pci-dma.c

Normal boot path on system with iommu support: swiotlb buffer will be allocated early at first and then try to initialize iommu, if iommu for intel or AMD could setup properly, swiotlb buffer will be freed. The early allocating is with bootmem, and could panic when we try to use kdump with buffer above 4G only, or with memmap to limit mem under 4G. for example: memmap=4095M$1M to remove memory

Normal boot path on system with iommu support: swiotlb buffer will be allocated early at first and then try to initialize iommu, if iommu for intel or AMD could setup properly, swiotlb buffer will be freed. The early allocating is with bootmem, and could panic when we try to use kdump with buffer above 4G only, or with memmap to limit mem under 4G. for example: memmap=4095M$1M to remove memory

Split out subsystem specific changes for easier reviews. This will be squashed with main commit. Signed-off-by: Krzysztof Kozlowski <k.kozlowski at samsung.com> --- drivers/xen/swiotlb-xen.c | 14 +++++++------- include/xen/swiotlb-xen.h | 12 ++++++------ 2 files changed, 13 insertions(+), 13 deletions(-) diff --git a/drivers/xen/swiotlb-xen.c b/drivers/xen/swiotlb-xen.c index

kill dead ocfs_empty stuff, cleanup d_revalidate handling. Index: dcache.c =================================================================== --- dcache.c (revision 1091) +++ dcache.c (working copy) @@ -44,24 +44,11 @@ #define OCFS_DEBUG_CONTEXT OCFS_DEBUG_CONTEXT_DCACHE -static int ocfs_empty_func(struct dentry *dentry, void *ignore); - -/* - * ocfs_dentry_revalidate() - * - */ -#if

The difference between kdev_t and dev_t in 2.4 is rather theoretical, no need to clutter up the source for it. Index: src/inode.c =================================================================== --- src/inode.c (revision 969) +++ src/inode.c (working copy) @@ -1877,11 +1872,8 @@ case OCFS_ATTRIB_FIFO: case OCFS_ATTRIB_SOCKET: { -#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,0)

> +/* > + * Virtio direct mapping DMA API operations structure > + * > + * This defines DMA API structure for all virtio devices which would not > + * either bring in their own DMA OPS from architecture or they would not > + * like to use architecture specific IOMMU based DMA OPS because QEMU > + * expects GPA instead of an IOVA in absence of VIRTIO_F_IOMMU_PLATFORM. > + */

Current implementation of DMA API inside virtio core calls device's DMA OPS callback functions when the flag VIRTIO_F_IOMMU_PLATFORM flag is set. But in absence of the flag, virtio core falls back calling basic transformation of the incoming SG addresses as GPA. Going forward virtio should only call DMA API based transformations generating either GPA or IOVA depending on QEMU expectations

It's both in 2.6 and recent 2.6 (for RH ASS2.1 you'll probably need to copy the latest 2.4 defintion, but I don't care for obsolete junk). Index: src/super.c =================================================================== --- src/super.c (revision 1014) +++ src/super.c (working copy) @@ -799,7 +799,7 @@ /* get first two blocks */ for (i=0; i<2; i++) { - bhs[i] = getblk

After switching DMA attributes to unsigned long it is easier to just compare the bits. Signed-off-by: Krzysztof Kozlowski <k.kozlowski at samsung.com> --- Documentation/DMA-API.txt | 4 +-- arch/arc/mm/dma.c | 4 +-- arch/arm/mm/dma-mapping.c | 36 ++++++++++++-------------- arch/arm/xen/mm.c

always use the 2.6 variants and fix up for 2.4 under the hood Index: src/journal.c =================================================================== --- src/journal.c (revision 1156) +++ src/journal.c (working copy) @@ -105,9 +105,17 @@ return status; } -#else -#define ocfs_journal_start journal_start -#define ocfs_journal_stop journal_stop + +#define journal_start(journal, nblocks) \ +

On arm64 the dma_map_ops implementation is based on the swiotlb. swiotlb-xen, used by default in dom0 on Xen, is also based on the swiotlb. Avoid calling into the default arm64 dma_map_ops functions from xen_dma_map_page, xen_dma_unmap_page, xen_dma_sync_single_for_cpu, and xen_dma_sync_single_for_device otherwise we end up calling into the swiotlb twice. When arm64 gets a non-swiotlb based

(vs format-changes branch) --- src/inc/ocfs_compat.h (revision 994) +++ src/inc/ocfs_compat.h (working copy) @@ -52,6 +70,8 @@ #define unlock_page(p) UnlockPage(p) #define Page_Uptodate(p) PageUptodate(p) +#define io_schedule schedule + #else /* LINUX_VERSION_CODE < 2.6 */ #define OCFS_GENERIC_SB_MEMBER(sb) ((sb)->s_fs_info) --- src/hash.c (revision 994) +++

This implements a loader for version 2.07 boot protocol bzImage format files. This allows a single bzImage kernel file to boot either native from a normal bootloader (grub, etc), or paravirtualized under Xen. These bzImages have two changes to make this possible: 1. There's a new field for the bootloader to tell the booted kernel what kind of environment its coming up under. We

This implements a loader for version 2.07 boot protocol bzImage format files. This allows a single bzImage kernel file to boot either native from a normal bootloader (grub, etc), or paravirtualized under Xen. These bzImages have two changes to make this possible: 1. There's a new field for the bootloader to tell the booted kernel what kind of environment its coming up under. We

This implements a loader for version 2.07 boot protocol bzImage format files. This allows a single bzImage kernel file to boot either native from a normal bootloader (grub, etc), or paravirtualized under Xen. These bzImages have two changes to make this possible: 1. There's a new field for the bootloader to tell the booted kernel what kind of environment its coming up under. We

> I don't understand why you want to factor out the information, > exactly. It seems like what you need is a function like: > > unsigned getMinLeadingZeros(const SCEV *); > > then, if you want to get the non-extended expression, you can just > apply an appropriate truncation. I assume, however, that I'm missing > something. The problem is not about how to codegen

Hi, Is there a reason that the allocate_empty_lowmem_region() function in hypervisor.c is only available in Domain 0. It is only included if CONFIG_XEN_PHYSDEV_ACCESS is defined, however, when I remove this it seems to work fine in DomUs. Thanks, Ross _______________________________________________ Xen-devel mailing list Xen-devel@lists.xensource.com http://lists.xensource.com/xen-devel

> Of course, and the point is that, for example, on x86_64, the zext here is free. I'm still trying to understand the problem... > > In the example you provided in your previous e-mail, we choose the solution: > > `GEP @Global, zext(V)` -> `GEP (@Global + zext VStart), {i64 0,+,1}` > `V` -> `trunc({i64 0,+,1}) + VStart` > > instead of the actually-better

Hi all, this patch series enables xen-swiotlb on arm and arm64. It has been heavily reworked compared to the previous versions in order to achieve better performances and to address review comments. We are not using dma_mark_clean to ensure coherency anymore. We call the platform implementation of map_page and unmap_page. We assume that dom0 has been mapped 1:1 (physical address == machine

this doesn't do anything but noisy debug printks anymore Index: src/super.c =================================================================== --- src/super.c (revision 1426) +++ src/super.c (working copy) @@ -196,9 +196,7 @@ static struct super_operations ocfs_sops = { .statfs = ocfs_statfs, - .put_inode = ocfs_put_inode, .clear_inode = ocfs_clear_inode, - //put_inode =