search for: mfn_x

...return _mfn(BAD_GVA_TO_GFN); + } + + /* Translate the GFN to an MFN */ + mfn = gfn_to_mfn(v->domain, gfn, &p2mt); + + if ( p2mt == p2m_ram_ro ) + return _mfn(READONLY_GFN); + if ( !p2m_is_ram(p2mt) ) + return _mfn(BAD_GFN_TO_MFN); + + ASSERT(mfn_valid(mfn_x(mfn))); + + return mfn; +} + +/* Check that the user is allowed to perform this write. + * Returns a mapped pointer to write to, or NULL for error. */ +#define MAPPING_UNHANDLEABLE ((void *)(unsigned long)X86EMUL_UNHANDLEABLE) +#define MAPPING_EXCEPTION ((void *)(unsigned long)X86EMUL_EXCEPT...

.../shadow/common.c Thu Sep 11 09:25:28 2008 +0900 @@ -701,7 +701,8 @@ static void _sh_resync(struct vcpu *v, m ASSERT(!sh_page_has_multiple_shadows(mfn_to_page(gmfn))); SHADOW_PRINTK("d=%d, v=%d, gmfn=%05lx, va=%lx\n", - v->domain->domain_id, v->vcpu_id, mfn_x(gmfn), va); + v->domain->domain_id, v->vcpu_id, mfn_x(gmfn), + sh_map_domain_page(gmfn)); /* Need to pull write access so the page *stays* in sync. */ if ( oos_remove_write_access(v, gmfn, fixup) ) @@ -953,7 +954,8 @@ int sh_unsync(struct vcpu *...

-- Advanced Micro Devices GmbH Sitz: Dornach, Gemeinde Aschheim, Landkreis München Registergericht München, HRB Nr. 43632 WEEE-Reg-Nr: DE 12919551 Geschäftsführer: Alberto Bozzo, Andrew Bowd _______________________________________________ Xen-devel mailing list Xen-devel@lists.xensource.com http://lists.xensource.com/xen-devel

...2MiB), - * the intermediate tables will be freed below after the ept flush */ + * the intermediate tables will be freed below after the ept flush + * + * Read-then-write is OK because we hold the p2m lock. */ old_entry = *ept_entry; if ( mfn_valid(mfn_x(mfn)) || direct_mmio || p2m_is_paged(p2mt) || @@ -390,10 +392,10 @@ new_entry.access = p2ma; new_entry.rsvd2_snp = (iommu_enabled && iommu_snoop); - if ( new_entry.mfn == mfn_x(mfn) ) + new_entry.mfn = mfn_x(mfn); + + if ( old_ent...

This patch series restores the use of superpages when restoring or migrating a VM, while retaining efficient batching of 4k pages when superpages are not appropriate or available. Signed-off-by: George Dunlap <george.dunlap@eu.citrix.com> _______________________________________________ Xen-devel mailing list Xen-devel@lists.xensource.com http://lists.xensource.com/xen-devel

Hi, V6: The only change from V5 is in patch #6: - changed comment to reflect autoxlate - removed a redundant ASSERT - reworked logic a bit so that get_page_from_gfn() is called with NULL for p2m type as before. arm has ASSERT wanting it to be NULL. Tim: patch 4 needs your approval. Daniel: patch 5 needs your approval. These patches implement PVH dom0. Patches 1 and 2

...uint64_t *guest_pdptrs; p2m_type_t p2mt; char *p; unsigned int try_count = 0; /* EPT needs to load PDPTRS into VMCS for PAE. */ if ( !hvm_pae_enabled(v) || (v->arch.hvm_vcpu.guest_efer & EFER_LMA) ) return; if ( cr3 & 0x1fUL ) goto crash; mfn = mfn_x(gfn_to_mfn(v->domain, cr3 >> PAGE_SHIFT, &p2mt)); if ( !p2m_is_ram(p2mt) ) goto crash; + if( p2m_is_paging(p2mt)) + { + p2m_mem_paging_populate(v->domain, cr3 >> PAGE_SHIFT); + do + { + mdelay(1); + try_count ++; +...

The following two patches allow the parallel use of memsharing, xenpaging and xen-access by using an independent ring buffer for each feature. Please review. v2: - update mem_event_check_ring arguments, check domain rather than domain_id - check ring_full first because its value was just evaluated - check if ring buffer is initialized before calling mem_access_domctl/mem_paging_domctl

Hi, Maybe it''s a dumb question, but I''m actually trying to understand how the memory allocation works within Xen. I try to give 128MB to a domU and see if it increases for example when I "nano" a 500mb file, but the process just get killed when it reachs the 128MB memory limit. How do I configure the guests so they can ask for more memory until a limit is reached

There has been some progress, but still no joy. Definitely not intended for inclusion at this point. Tim, Wei, I added a Xen command line toggle to disable IOMMU and P2M table sharing. Tim, I verified that changes to p2m-pt.c don''t break shadow mode (64bit hypervisor and Win 7 guest). Hongkaixing, I incorporated your suggestion in patch 2, so I should add your Signed-off-by eventually.

...ulti.c --- a/xen/arch/x86/mm/shadow/multi.c Mon Feb 18 21:26:57 2008 +0000 +++ b/xen/arch/x86/mm/shadow/multi.c Tue Feb 19 00:20:00 2008 +0000 @@ -3020,7 +3020,7 @@ static int sh_page_fault(struct vcpu *v, "injection: cr2=%#lx, mfn=%#lx\n", va, mfn_x(gmfn)); sh_remove_shadows(v, gmfn, 0 /* thorough */, 1 /* must succeed */); - goto done; + return EXCRET_fault_fixed; } } _______________________________________________ Xen-devel mailing list Xen-devel@lists.xensource.com http://lists.xensource.c...

This patch series includes a series of bugs related to p2m, ept, and PoD code which were found as part of our XenServer product testing. Each of these fixes actual bugs, and the 3.4-based version of the patch has been tested thoroughly. (There may be bugs in porting the patches, but most of them are simple enough as to make it unlikely.) Each patch is conceptually independent, so they can each

Dear All: I am pretty new to xen-devel, please correct me in the following. Assume we have the following terms GPT: guest page table SPT: shadow page table (Question a) When guest OS is running, is it always using SPT for address translation? If it is the case, how does guest OS refer and modify its own GPT content? It seems that there is a page table entry in SPT for the GPT page. (Question

Populate-on-demand: Check pages being returned by the balloon driver This patch series is the second result of my work last summer on decreasing fragmentation of superpages in a guests'' p2m when using populate-on-demand. This patch series is against 4.1; I''m posting it to get feedback on the viability of getting a ported version of this patch into 4.2. As with the previous

ging_prep ensures that an mfn is backing the paged-out gfn, and transitions to the next state in the paging state machine for this page. Foreign mappings of the gfn will now succeed. This is the key idea, as it allows the pager to now map the gfn and fill in its contents. Unfortunately, it also allows any other foreign mapper to map the gfn and read its contents. This is particularly dangerous

Hi, I looked at the sources and figured out all about the P2M, M2P tables and mappings, Now I''m trying to figure out how dom0 virtual memory is implemented, and I have some questions. The platform I''m working on is x86 with Intel VT enabled. 1. Is dom0 virtual memory managed differently than the other domains? what about hvms? and domUs? 2. What tables are used to manage the

Hi, kdb: to debug xen hypervisor, could also debug guests gdbsx: to debug PV/HVM linux guests The tree is : http://xenbits.xensource.com/ext/debuggers.hg See README-dbg. You''ll need to setup serial access for kdb. Thanks, Mukesh > > Hi Dan, > > I''m currently using your version of ssplitd as it is. I haven''t tried > kdb. For some reason I

...@@ -967,13 +967,13 @@ shadow_set_p2m_entry(struct domain *d, u p2m_entry = p2m_find_entry(table, &gfn_remainder, gfn, 0, L1_PAGETABLE_ENTRIES); ASSERT(p2m_entry); - if ( valid_mfn(mfn) ) + if ( mfn_valid(mfn) ) *p2m_entry = l1e_from_pfn(mfn_x(mfn), __PAGE_HYPERVISOR|_PAGE_USER); else *p2m_entry = l1e_empty(); /* Track the highest gfn for which we have ever had a valid mapping */ - if ( valid_mfn(mfn) && (gfn > d->arch.max_mapped_pfn) ) + if ( mfn_valid(mfn) && (gfn > d->arch.max_mapp...

...} old_mfn = pagetable_get_mfn(v->arch.monitor_table); @@ -2590,7 +2588,8 @@ static void sh_update_paging_modes(struc * pull it down! Switch CR3, and warn the HVM code that * its host cr3 has changed. */ make_cr3(v, mfn_x(new_mfn)); - write_ptbase(v); + if ( v == current ) + write_ptbase(v); hvm_update_host_cr3(v); old_mode->destroy_monitor_table(v, old_mfn); } _______________________________________________ Xen-devel...

...11 +0800 @@ -1004,7 +1004,7 @@ static void vmx_load_pdptrs(struct vcpu if ( !hvm_pae_enabled(v) || (v->arch.hvm_vcpu.guest_efer & EFER_LMA) ) return; - if ( cr3 & 0x1fUL ) + if ( (cr3 & 0x1fUL) && !hvm_pcid_enabled(v) ) goto crash; mfn = mfn_x(gfn_to_mfn(v->domain, cr3 >> PAGE_SHIFT, &p2mt)); @@ -2661,6 +2661,7 @@ asmlinkage void vmx_vmexit_handler(struc case EXIT_REASON_ACCESS_GDTR_OR_IDTR: case EXIT_REASON_ACCESS_LDTR_OR_TR: case EXIT_REASON_VMX_PREEMPTION_TIMER_EXPIRED: + case EXIT_REASON_INVPCID: /...