search for: gnttab_map

hi all, I noticed "CONFIG_XEN" appears many times in Xen source code. I''m confused about the meaning of "CONFIG_XEN". For example, in "gnttab.c", the definations of gnttab_map() and gnttab_resume() vary with "ifdef CONFIG_XEN" or not. And I also noticed ifndef CONFIG_XEN , the file <platform-pci.h> is included. So my questions are 1)What''s the meanning of CONFIG_XEN? and on which kind of conditions, CONFIG_XEN should not be defined? 2...

...race: [ 32.304858] <IRQ> [ 32.304861] [<ffffffff81061857>] paravirt_enter_lazy_mmu+0x27/0x30 [ 32.304879] [<ffffffff811b1fe2>] apply_to_page_range+0x282/0x460 [ 32.304888] [<ffffffff810206b0>] ? map_pte_fn+0x60/0x60 [ 32.304894] [<ffffffff810207fb>] arch_gnttab_map_status+0x3b/0x70 [ 32.304904] [<ffffffff813d5176>] gnttab_map_frames_v2+0xd6/0x150 [ 32.304910] [<ffffffff813d5291>] gnttab_map+0xa1/0x140 [ 32.304917] [<ffffffff813d5430>] get_free_entries+0x100/0x2e0 [ 32.304923] [<ffffffff813d56d5>] gnttab_alloc_grant_referenc...

...<IRQ> > [ 32.304861] [<ffffffff81061857>] paravirt_enter_lazy_mmu+0x27/0x30 > [ 32.304879] [<ffffffff811b1fe2>] apply_to_page_range+0x282/0x460 > [ 32.304888] [<ffffffff810206b0>] ? map_pte_fn+0x60/0x60 > [ 32.304894] [<ffffffff810207fb>] arch_gnttab_map_status+0x3b/0x70 > [ 32.304904] [<ffffffff813d5176>] gnttab_map_frames_v2+0xd6/0x150 > [ 32.304910] [<ffffffff813d5291>] gnttab_map+0xa1/0x140 > [ 32.304917] [<ffffffff813d5430>] get_free_entries+0x100/0x2e0 > [ 32.304923] [<ffffffff813d56d5>] gnttab_...

On 01/06/2018 03:16 AM, Dmitry Melekhov wrote: > The same problem with latest centos 6 kernel,i.e. with meltdown fix. > > I can't see console output, because I have it on "cloud" provider > hosting :-) > > > > 06.01.2018 05:13, Shaun Reitan ?????: >> Broken! >> >> For those of you looking for a PV enabled client Kernel for CentOS Linux

...+ 4 files changed, 12 insertions(+), 4 deletions(-) create mode 100644 include/asm-x86/xen/grant_table.h diff --git a/drivers/xen/grant-table.c b/drivers/xen/grant-table.c index 95016fd..9fcde20 100644 --- a/drivers/xen/grant-table.c +++ b/drivers/xen/grant-table.c @@ -478,7 +478,7 @@ static int gnttab_map(unsigned int start_idx, unsigned int end_idx) if (shared == NULL) { struct vm_struct *area; - area = alloc_vm_area(PAGE_SIZE * max_nr_grant_frames()); + area = xen_alloc_vm_area(PAGE_SIZE * max_nr_grant_frames()); BUG_ON(area == NULL); shared = area->addr; } diff --git a/drivers...

...+ 4 files changed, 12 insertions(+), 4 deletions(-) create mode 100644 include/asm-x86/xen/grant_table.h diff --git a/drivers/xen/grant-table.c b/drivers/xen/grant-table.c index 95016fd..9fcde20 100644 --- a/drivers/xen/grant-table.c +++ b/drivers/xen/grant-table.c @@ -478,7 +478,7 @@ static int gnttab_map(unsigned int start_idx, unsigned int end_idx) if (shared == NULL) { struct vm_struct *area; - area = alloc_vm_area(PAGE_SIZE * max_nr_grant_frames()); + area = xen_alloc_vm_area(PAGE_SIZE * max_nr_grant_frames()); BUG_ON(area == NULL); shared = area->addr; } diff --git a/drivers...

...t; ffffc90000608fff > [? 587.145018] Call Trace: > [? 587.145018]? <IRQ> > [? 587.145018]? [<ffffffff81046bc7>] paravirt_enter_lazy_mmu+0x27/0x30 > [? 587.145018]? [<ffffffff8116d8d6>] apply_to_page_range+0x266/0x440 > [? 587.145018]? [<ffffffff8100a7fb>] arch_gnttab_map_status+0x3b/0x70 > [? 587.145018]? [<ffffffff81362486>] gnttab_map_frames_v2+0xd6/0x150 > [? 587.145018]? [<ffffffff813625a1>] gnttab_map+0xa1/0x140 > [? 587.145018]? [<ffffffff81362740>] get_free_entries+0x100/0x2e0 > [? 587.145018]? [<ffffffff813629e5>] gnttab_...

...0000000 ffffffff811f10f8 ffff88001f005d90 [69204.815336] <0> 0000000000000000 ffffffff810e831c 0000000000000000 ffff88001fd58620 [69204.815336] <0> ffff88001fca2000 00000000000067f9 ffffffff8100e63d ffffffff8100ecf2 [69204.815336] Call Trace: [69204.815336] [<ffffffff811f10f8>] ? gnttab_map+0x105/0x112 [69204.815336] [<ffffffff810e831c>] ? kfree+0xc6/0xcb [69204.815336] [<ffffffff8100e63d>] ? xen_force_evtchn_callback+0x9/0xa [69204.815336] [<ffffffff8100ecf2>] ? check_events+0x12/0x20 [69204.815336] [<ffffffff811f3980>] ? xen_suspend+0xaf/0xc4 [69204.81533...

...0fa04d000 0000000000000004 ffffc90000608fff [ 587.145018] Call Trace: [ 587.145018] <IRQ> [ 587.145018] [<ffffffff81046bc7>] paravirt_enter_lazy_mmu+0x27/0x30 [ 587.145018] [<ffffffff8116d8d6>] apply_to_page_range+0x266/0x440 [ 587.145018] [<ffffffff8100a7fb>] arch_gnttab_map_status+0x3b/0x70 [ 587.145018] [<ffffffff81362486>] gnttab_map_frames_v2+0xd6/0x150 [ 587.145018] [<ffffffff813625a1>] gnttab_map+0xa1/0x140 [ 587.145018] [<ffffffff81362740>] get_free_entries+0x100/0x2e0 [ 587.145018] [<ffffffff813629e5>] gnttab_alloc_grant_referen...

Hi Jeremy. According to your suggestion, I recreated patches for Ingo's x86.git tree. And this patch series includes Eddie's modification. Please review and forward them. (or push back to respin.) Recently the xen-ia64 community started to make efforts to merge xen/ia64 Linux to upstream. The first step is to merge up domU portion. This patchset is preliminary for xen/ia64 domU linux

Hi Jeremy. According to your suggestion, I recreated patches for Ingo's x86.git tree. And this patch series includes Eddie's modification. Please review and forward them. (or push back to respin.) Recently the xen-ia64 community started to make efforts to merge xen/ia64 Linux to upstream. The first step is to merge up domU portion. This patchset is preliminary for xen/ia64 domU linux

This is a cherry pick of two patches that add support for guest paged out frames in the XCP 2.6.32 dom0 patch queue. First patch propagates the ENOENT returned by the hypervisor in the case of a paged out page, all the way up the call chain to the MMAPBATCH_V2 ioctl. The ioctl is mainly used to harvest those return values and retry. The second patch adds retry loops to all backend grant

Hi, I''ve added some preliminary support for VT-d for paravirtualized guests. This must be enabled using an ''iommu_pv'' boot parameter (disabled by default). I''ve added some python bindigs to allow xend to assign PCI devices to IOMMU for PV guests. For HVM guests this is handled in ioemu. Not sure if it makes sense to handle both cases in one place. The

...0; shared_info_area->vcpu_info[0].evtchn_pending_sel = 0; + + return STATUS_SUCCESS; } static ev_action_t ev_actions[NR_EVENTS]; diff -r b26bdba50c41 xenpci/gnttbl.c --- a/xenpci/gnttbl.c Thu Nov 01 16:21:24 2007 -0700 +++ b/xenpci/gnttbl.c Fri Nov 02 09:52:30 2007 -0700 @@ -63,7 +63,7 @@ GntTab_Map(unsigned int start_idx, unsig xatp.domid = DOMID_SELF; xatp.idx = i; xatp.space = XENMAPSPACE_grant_table; - xatp.gpfn = (gnttab_table_physical.QuadPart >> PAGE_SHIFT) + i; + xatp.gpfn = (xen_pfn_t)(gnttab_table_physical.QuadPart >> PAGE_SHIFT) + i; if (HYPERVI...

...xen are corrupted. After some debugging (with the help of HW debugger), I found that cache polution happens, and here is the detailed sequence. 1) DomU kernel allocates a local variable struct xen_add_to_physmap xatp and the GVA of xatp is 0xc785fe38 (note that not cache-line aligned) (see gnttab_map function in linux/drivers/xen/grant-table.c) 2) GVA of xatp is mapped in xen page table at raw_copy_from_guest function, and the VA of xen is 0xae48ee38 and its contents are cached. 3) DomU kernel reuses xatp to invoke the second hypercall with different parameters. 4) GVA of xatp is...

Patrick, there following patches fix xenpaging for me. Granttable handling is incomplete. If a page is gone, a GNTST_eagain should be returned to the caller to inidcate the hypercall has to be retried after a while, until the page is available again. Please review. Olaf _______________________________________________ Xen-devel mailing list Xen-devel@lists.xensource.com

Hi. This patchset implements xen/ia64 domU support. Qing He and Eddie Dong also has been woring on pv_ops so that I want to discuss before going further and avoid duplicated work. I suppose that Eddie will also post his own patch. So reviewing both patches, we can reach to better pv_ops interface. - I didn't changed the ia64 intrinsic paravirtulization abi from the last post. Presumably it

Hi. This patchset implements xen/ia64 domU support. Qing He and Eddie Dong also has been woring on pv_ops so that I want to discuss before going further and avoid duplicated work. I suppose that Eddie will also post his own patch. So reviewing both patches, we can reach to better pv_ops interface. - I didn't changed the ia64 intrinsic paravirtulization abi from the last post. Presumably it

Hi Andi, This series of patches implements the Xen paravirt-ops interface. It applies to 2.6.21-rc7 + your patches + the last batch of pv_ops patches I posted. This patch generally restricts itself to Xen-specific parts of the tree, though it does make a few small changes elsewhere. These patches include: - some helper routines for allocating address space and walking pagetables - Xen

Hi Andi, This series of patches implements the Xen paravirt-ops interface. It applies to 2.6.21-rc7 + your patches + the last batch of pv_ops patches I posted. This patch generally restricts itself to Xen-specific parts of the tree, though it does make a few small changes elsewhere. These patches include: - some helper routines for allocating address space and walking pagetables - Xen