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Hi! I cleaned up xen/include/asm-x86/guest_access.h. I also fixed a bug in __copy_field_from_guest(), which seems to me to be a kind of cut-copy-paste bug. copy_{to,from}_user() and copy_{to,from}_user_hvm() expect a non-const argument as the first argument. So I remove the consts from the initializer. I replace typeof with __typeof__, which is always available in gcc - it is n...

(CCed to xen-devel for completeness. ;) On Wed, 2006-08-16 at 17:24 +0200, Tristan Gingold wrote: > I am porting xen-ppc''s xencomm to xen/ia64. > Currently on xen/ia64 copy_from/to_guest uses guest virtual address. This > works well as long as the virtual addresses are in the TLB. When not in TLB > (or vTLB) the hypercall can''t success without domain help. The possible > solution is either to touch the memory areas before doing the hypercall &g...

...0_byte, ocaml_guestfs_sfdisk_byte, ocaml_guestfs_sfdisk_N_byte. --- src/generator.ml | 7 +++++++ 1 files changed, 7 insertions(+), 0 deletions(-) diff --git a/src/generator.ml b/src/generator.ml index 46fcf2c..fa7d240 100755 --- a/src/generator.ml +++ b/src/generator.ml @@ -6770,6 +6770,10 @@ copy_table (char * const * argv) let needs_extra_vs = match fst style with RConstOptString _ -> true | _ -> false in + pr "/* Emit prototype to appease gcc's -Wmissing-prototypes. */\n"; + pr "CAMLprim value ocaml_guestfs_%s (value %s" name (List.h...

We can't copy_*_user while holding reservations, that will (soon even for nouveau) lead to deadlocks. And it breaks the cross-driver contract around dma_resv. Fix this by adding a slowpath for when we need relocations, and by pushing the writeback of the new presumed offsets to the very end. Aside from "it...

Well, I''ve managed to screw myself but good, apparently. I cleanup my "old" versions of actionmailer and actionpack, and now the rails gem is unavailable and of course, I can''t start rails 1.1.2 without the latest actionpack and actionmailer. None of the rails related gems appears to be currently available in the repository for me to get the old versions back so

We can't copy_*_user while holding reservations, that will (soon even for nouveau) lead to deadlocks. And it breaks the cross-driver contract around dma_resv. Fix this by adding a slowpath for when we need relocations, and by pushing the writeback of the new presumed offsets to the very end. Aside from "it...

We can't copy_*_user while holding reservations, that will (soon even for nouveau) lead to deadlocks. And it breaks the cross-driver contract around dma_resv. Fix this by adding a slowpath for when we need relocations, and by pushing the writeback of the new presumed offsets to the very end. Aside from "it...

We can't copy_*_user while holding reservations, that will (soon even for nouveau) lead to deadlocks. And it breaks the cross-driver contract around dma_resv. Fix this by adding a slowpath for when we need relocations, and by pushing the writeback of the new presumed offsets to the very end. Aside from "it...

On Wed, Aug 21, 2019 at 11:50:29PM +0200, Daniel Vetter wrote: > We can't copy_*_user while holding reservations, that will (soon even > for nouveau) lead to deadlocks. And it breaks the cross-driver > contract around dma_resv. > > Fix this by adding a slowpath for when we need relocations, and by > pushing the writeback of the new presumed offsets to the very...

Hello, As I saw in this mailing list, there should be some emulation solution for drivers when using VT-x processors. See for example : http://lists.xensource.com/archives/html/xen-devel/2005-12/msg00763.html My question is this; As I understand, the VMX support in the new VT-x processors enables us to prevent Guest OSs from performing unwanted instructions (HLT , for example). This

On Mon, Nov 04, 2019 at 06:38:00PM +0100, Daniel Vetter wrote: > We can't copy_*_user while holding reservations, that will (soon even > for nouveau) lead to deadlocks. And it breaks the cross-driver > contract around dma_resv. > > Fix this by adding a slowpath for when we need relocations, and by > pushing the writeback of the new presumed offsets to the very...

...and only two of the guest states: - stable (S): there is essential content in the page - unused (U): there is no usefull content and any access to the page will cause an addressing exception. Since the access of unused pages causes addressing exceptions we need to take care with /dev/mem. The copy_{from_to}_user functions need to be able to cope with addressing exceptions for the kernel address space. Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com> --- arch/s390/Kconfig | 3 ++ arch/s390/kernel/head64.S | 10 +++++++ arch/s390/lib/uaccess.S |...

...and only two of the guest states: - stable (S): there is essential content in the page - unused (U): there is no usefull content and any access to the page will cause an addressing exception. Since the access of unused pages causes addressing exceptions we need to take care with /dev/mem. The copy_{from_to}_user functions need to be able to cope with addressing exceptions for the kernel address space. Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com> --- arch/s390/Kconfig | 3 ++ arch/s390/kernel/head64.S | 10 +++++++ arch/s390/lib/uaccess.S |...

...er->rhdr) + len) { + ret = -ENOBUFS; + goto return_buf; + } + + tmp = len + sizeof(iter->rhdr); + } + + /* len is now the size of the payload */ + iov_iter_init(&iter->iov_iter, WRITE, vq->iov, cnt, tmp); + + /* Read the RPMSG header with endpoint addresses */ + tmp = copy_from_iter(&iter->rhdr, sizeof(iter->rhdr), &iter->iov_iter); + if (tmp != sizeof(iter->rhdr)) { + vq_err(vq, "%s(): got %zu instead of %zu\n", __func__, + tmp, sizeof(iter->rhdr)); + ret = -EIO; + goto return_buf; + } + + iter->ept = vhost_rpmsg_...

...zeof(iter->rhdr) + len) { + iter->head = -ENOBUFS; + goto return_buf; + } + + /* len is now the size of the payload */ + iov_iter_init(&iter->iov_iter, WRITE, + vq->iov, 1, sizeof(iter->rhdr) + len); + + /* Read the RPMSG header with endpoint addresses */ + tmp = copy_from_iter(&iter->rhdr, sizeof(iter->rhdr), + &iter->iov_iter); + if (tmp != sizeof(iter->rhdr)) { + vq_err(vq, "%s(): got %zu instead of %zu\n", __func__, + tmp, sizeof(iter->rhdr)); + iter->head = -EIO; + goto return_buf; + } + + iter-&g...

...zeof(iter->rhdr) + len) { + iter->head = -ENOBUFS; + goto return_buf; + } + + /* len is now the size of the payload */ + iov_iter_init(&iter->iov_iter, WRITE, + vq->iov, 1, sizeof(iter->rhdr) + len); + + /* Read the RPMSG header with endpoint addresses */ + tmp = copy_from_iter(&iter->rhdr, sizeof(iter->rhdr), &iter->iov_iter); + if (tmp != sizeof(iter->rhdr)) { + vq_err(vq, "%s(): got %zu instead of %zu\n", __func__, + tmp, sizeof(iter->rhdr)); + iter->head = -EIO; + goto return_buf; + } + + iter->ept = vh...

...ng address; + struct page *page; + + /* + * get the real address that caused the block validity + * exception. + */ + address = S390_lowcore.trans_exc_code & __FAIL_ADDR_MASK; + page = pfn_to_page(address >> PAGE_SHIFT); + + /* + * Check for the special case of a discard fault in + * copy_{from,to}_user. User copy is done using the + * two special instructions mvcp/mvcs. + */ + if (!(regs->psw.mask & PSW_MASK_PSTATE)) { + switch (*(unsigned char *) regs->psw.addr) { + case 0xda: /* mvcp */ + fixup_user_copy(regs, address, + *(__u16 *)(regs->psw.addr + 2)); +...

...ng address; + struct page *page; + + /* + * get the real address that caused the block validity + * exception. + */ + address = S390_lowcore.trans_exc_code & __FAIL_ADDR_MASK; + page = pfn_to_page(address >> PAGE_SHIFT); + + /* + * Check for the special case of a discard fault in + * copy_{from,to}_user. User copy is done using the + * two special instructions mvcp/mvcs. + */ + if (!(regs->psw.mask & PSW_MASK_PSTATE)) { + switch (*(unsigned char *) regs->psw.addr) { + case 0xda: /* mvcp */ + fixup_user_copy(regs, address, + *(__u16 *)(regs->psw.addr + 2)); +...

...t; + tmp = len + sizeof(iter->rhdr); > > + } > > + > > + /* len is now the size of the payload */ > > + iov_iter_init(&iter->iov_iter, WRITE, vq->iov, cnt, tmp); > > + > > + /* Read the RPMSG header with endpoint addresses */ > > + tmp = copy_from_iter(&iter->rhdr, sizeof(iter->rhdr), &iter->iov_iter); > > + if (tmp != sizeof(iter->rhdr)) { > > + vq_err(vq, "%s(): got %zu instead of %zu\n", __func__, > > + tmp, sizeof(iter->rhdr)); > > + ret = -EIO; > > + goto...

...long arg) +{ + struct vhost_dsp *dsp = filp->private_data; + void __user *argp = (void __user *)arg; + struct vhost_adsp_topology tplg; + u64 __user *featurep = argp; + u64 features; + int start; + long ret; + + switch (ioctl) { + case VHOST_GET_FEATURES: + features = VHOST_DSP_FEATURES; + if (copy_to_user(featurep, &features, sizeof(features))) + return -EFAULT; + return 0; + case VHOST_SET_FEATURES: + if (copy_from_user(&features, featurep, sizeof(features))) + return -EFAULT; + return vhost_dsp_set_features(dsp, features); + case VHOST_GET_BACKEND_FEATURES: + features = 0; +...