[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index] [Xen-devel] [PATCH v2 6/8] tools: arm: refactor code to setup guest p2m and fill it with RAM
This will help when we have more guest RAM banks. Mostly code motion of the p2m_host initialisation and allocation loop into the new function populate_guest_memory, but in addition in the caller we now initialise the p2m all the INVALID_MFN to handle any holes, although in this patch we still fill in the entire allocated region. Signed-off-by: Ian Campbell <ian.campbell@xxxxxxxxxx> --- v2: New patch --- tools/libxc/xc_dom_arm.c | 62 ++++++++++++++++++++++++++++++++-------------- 1 file changed, 43 insertions(+), 19 deletions(-) diff --git a/tools/libxc/xc_dom_arm.c b/tools/libxc/xc_dom_arm.c index 8775ca4..61f9ba6 100644 --- a/tools/libxc/xc_dom_arm.c +++ b/tools/libxc/xc_dom_arm.c @@ -247,10 +247,42 @@ static int set_mode(xc_interface *xch, domid_t domid, char *guest_type) return rc; } +static int populate_guest_memory(struct xc_dom_image *dom, + xen_pfn_t base_pfn, xen_pfn_t nr_pfns) +{ + int rc; + xen_pfn_t allocsz, pfn; + + if (!nr_pfns) + return 0; + + DOMPRINTF("%s: populating RAM @ %016"PRIx64"-%016"PRIx64" (%"PRId64"MB)", + __FUNCTION__, + (uint64_t)base_pfn << XC_PAGE_SHIFT, + (uint64_t)(base_pfn + nr_pfns) << XC_PAGE_SHIFT, + (uint64_t)nr_pfns >> (20-XC_PAGE_SHIFT)); + + for ( pfn = 0; pfn < nr_pfns; pfn++ ) + dom->p2m_host[pfn] = base_pfn + pfn; + + for ( pfn = rc = allocsz = 0; (pfn < nr_pfns) && !rc; pfn += allocsz ) + { + allocsz = nr_pfns - pfn; + if ( allocsz > 1024*1024 ) + allocsz = 1024*1024; + + rc = xc_domain_populate_physmap_exact( + dom->xch, dom->guest_domid, allocsz, + 0, 0, &dom->p2m_host[pfn]); + } + + return rc; +} + int arch_setup_meminit(struct xc_dom_image *dom) { int rc; - xen_pfn_t pfn, allocsz, i; + xen_pfn_t pfn; uint64_t modbase; /* Convenient */ @@ -259,6 +291,8 @@ int arch_setup_meminit(struct xc_dom_image *dom) const uint64_t ram0size = ramsize; const uint64_t ram0end = GUEST_RAM0_BASE + ram0size; + const xen_pfn_t p2m_size = (ram0end - GUEST_RAM0_BASE) >> XC_PAGE_SHIFT; + const uint64_t kernbase = dom->kernel_seg.vstart; const uint64_t kernend = ROUNDUP(dom->kernel_seg.vend, 21/*2MB*/); const uint64_t kernsize = kernend - kernbase; @@ -292,27 +326,17 @@ int arch_setup_meminit(struct xc_dom_image *dom) dom->shadow_enabled = 1; - dom->p2m_host = xc_dom_malloc(dom, sizeof(xen_pfn_t) * dom->total_pages); + dom->p2m_host = xc_dom_malloc(dom, sizeof(xen_pfn_t) * p2m_size); if ( dom->p2m_host == NULL ) return -EINVAL; + for ( pfn = 0; pfn < p2m_size; pfn++ ) + dom->p2m_host[pfn] = INVALID_MFN; - /* setup initial p2m */ - for ( pfn = 0; pfn < dom->total_pages; pfn++ ) - dom->p2m_host[pfn] = pfn + dom->rambase_pfn; - - /* allocate guest memory */ - for ( i = rc = allocsz = 0; - (i < dom->total_pages) && !rc; - i += allocsz ) - { - allocsz = dom->total_pages - i; - if ( allocsz > 1024*1024 ) - allocsz = 1024*1024; - - rc = xc_domain_populate_physmap_exact( - dom->xch, dom->guest_domid, allocsz, - 0, 0, &dom->p2m_host[i]); - } + /* setup initial p2m and allocate guest memory */ + if ((rc = populate_guest_memory(dom, + GUEST_RAM0_BASE >> XC_PAGE_SHIFT, + ram0size >> XC_PAGE_SHIFT))) + return rc; /* * We try to place dtb+initrd at 128MB or if we have less RAM -- 1.7.10.4 _______________________________________________ Xen-devel mailing list Xen-devel@xxxxxxxxxxxxx http://lists.xen.org/xen-devel
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