[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index] [Xen-changelog] [xen staging] xen/arm: introduce allocate_memory
commit f2931b4233ec38e9f8d2b3ec6d86a9c7f9ebedc2 Author: Stefano Stabellini <sstabellini@xxxxxxxxxx> AuthorDate: Tue Nov 13 09:00:25 2018 -0800 Commit: Julien Grall <julien.grall@xxxxxxx> CommitDate: Wed Nov 14 19:34:47 2018 +0000 xen/arm: introduce allocate_memory Introduce an allocate_memory function able to allocate memory for DomUs and map it at the right guest addresses, according to the guest memory map: GUEST_RAM0_BASE and GUEST_RAM1_BASE. This is under #if 0 as not used for now. Signed-off-by: Julien Grall <julien.grall@xxxxxxx> Signed-off-by: Stefano Stabellini <stefanos@xxxxxxxxxx> --- xen/arch/arm/domain_build.c | 101 ++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 101 insertions(+) diff --git a/xen/arch/arm/domain_build.c b/xen/arch/arm/domain_build.c index 66a258ab9c..957572bded 100644 --- a/xen/arch/arm/domain_build.c +++ b/xen/arch/arm/domain_build.c @@ -368,6 +368,107 @@ static void __init allocate_memory_11(struct domain *d, } } +#if 0 +static bool __init allocate_bank_memory(struct domain *d, + struct kernel_info *kinfo, + gfn_t sgfn, + unsigned long tot_size) +{ + int res; + struct page_info *pg; + struct membank *bank; + unsigned int max_order = ~0; + + bank = &kinfo->mem.bank[kinfo->mem.nr_banks]; + bank->start = gfn_to_gaddr(sgfn); + bank->size = tot_size; + + while ( tot_size > 0 ) + { + unsigned int order = get_allocation_size(tot_size); + + order = min(max_order, order); + + pg = alloc_domheap_pages(d, order, 0); + if ( !pg ) + { + /* + * If we can't allocate one page, then it is unlikely to + * succeed in the next iteration. So bail out. + */ + if ( !order ) + return false; + + /* + * If we can't allocate memory with order, then it is + * unlikely to succeed in the next iteration. + * Record the order - 1 to avoid re-trying. + */ + max_order = order - 1; + continue; + } + + res = guest_physmap_add_page(d, sgfn, page_to_mfn(pg), order); + if ( res ) + { + dprintk(XENLOG_ERR, "Failed map pages to DOMU: %d", res); + return false; + } + + sgfn = gfn_add(sgfn, 1UL << order); + tot_size -= (1ULL << (PAGE_SHIFT + order)); + } + + kinfo->mem.nr_banks++; + kinfo->unassigned_mem -= bank->size; + + return true; +} + +static void __init allocate_memory(struct domain *d, struct kernel_info *kinfo) +{ + unsigned int i; + unsigned long bank_size; + + printk(XENLOG_INFO "Allocating mappings totalling %ldMB for %pd:\n", + /* Don't want format this as PRIpaddr (16 digit hex) */ + (unsigned long)(kinfo->unassigned_mem >> 20), d); + + kinfo->mem.nr_banks = 0; + bank_size = MIN(GUEST_RAM0_SIZE, kinfo->unassigned_mem); + if ( !allocate_bank_memory(d, kinfo, gaddr_to_gfn(GUEST_RAM0_BASE), + bank_size) ) + goto fail; + + bank_size = MIN(GUEST_RAM1_SIZE, kinfo->unassigned_mem); + if ( !allocate_bank_memory(d, kinfo, gaddr_to_gfn(GUEST_RAM1_BASE), + bank_size) ) + goto fail; + + if ( kinfo->unassigned_mem ) + goto fail; + + for( i = 0; i < kinfo->mem.nr_banks; i++ ) + { + printk(XENLOG_INFO "%pd BANK[%d] %#"PRIpaddr"-%#"PRIpaddr" (%ldMB)\n", + d, + i, + kinfo->mem.bank[i].start, + kinfo->mem.bank[i].start + kinfo->mem.bank[i].size, + /* Don't want format this as PRIpaddr (16 digit hex) */ + (unsigned long)(kinfo->mem.bank[i].size >> 20)); + } + + return; + +fail: + panic("Failed to allocate requested domain memory." + /* Don't want format this as PRIpaddr (16 digit hex) */ + " %ldKB unallocated. Fix the VMs configurations.\n", + (unsigned long)kinfo->unassigned_mem >> 10); +} +#endif + static int __init write_properties(struct domain *d, struct kernel_info *kinfo, const struct dt_device_node *node) { -- generated by git-patchbot for /home/xen/git/xen.git#staging _______________________________________________ Xen-changelog mailing list Xen-changelog@xxxxxxxxxxxxxxxxxxxx https://lists.xenproject.org/xen-changelog
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