From: Juergen Gross <jgross@suse.com> To: grub-devel@gnu.org Cc: Juergen Gross <jgross@suse.com>, phcoder@gmail.com, daniel.kiper@oracle.com, mchang@suse.com, xen-devel@lists.xen.org Subject: [PATCH v5 06/11] xen: factor out p2m list allocation into separate function Date: Thu, 25 Feb 2016 12:33:32 +0100 [thread overview] Message-ID: <1456400017-5789-7-git-send-email-jgross@suse.com> (raw) In-Reply-To: <1456400017-5789-1-git-send-email-jgross@suse.com> Do the p2m list allocation of the to be loaded kernel in a separate function. This will allow doing the p2m list allocation at different times of the boot preparations depending on the features the kernel is supporting. While at this remove superfluous setting of first_p2m_pfn and nr_p2m_frames as those are needed only in case of the p2m list not being mapped by the initial kernel mapping. Signed-off-by: Juergen Gross <jgross@suse.com> Reviewed-by: Daniel Kiper <daniel.kiper@oracle.com> --- grub-core/loader/i386/xen.c | 87 ++++++++++++++++++++++++++------------------- 1 file changed, 50 insertions(+), 37 deletions(-) diff --git a/grub-core/loader/i386/xen.c b/grub-core/loader/i386/xen.c index 691c22e..a2fd1f6 100644 --- a/grub-core/loader/i386/xen.c +++ b/grub-core/loader/i386/xen.c @@ -44,8 +44,10 @@ GRUB_MOD_LICENSE ("GPLv3+"); struct xen_loader_state { struct grub_relocator *relocator; + struct grub_relocator_xen_state state; struct start_info next_start; struct grub_xen_file_info xen_inf; + grub_xen_mfn_t *virt_mfn_list; grub_uint64_t max_addr; struct xen_multiboot_mod_list *module_info_page; grub_uint64_t modules_target_start; @@ -170,7 +172,7 @@ generate_page_table (grub_uint64_t *where, grub_uint64_t paging_start, } static grub_err_t -set_mfns (grub_xen_mfn_t * new_mfn_list, grub_xen_mfn_t pfn) +set_mfns (grub_xen_mfn_t pfn) { grub_xen_mfn_t i, t; grub_xen_mfn_t cn_pfn = -1, st_pfn = -1; @@ -179,32 +181,34 @@ set_mfns (grub_xen_mfn_t * new_mfn_list, grub_xen_mfn_t pfn) for (i = 0; i < grub_xen_start_page_addr->nr_pages; i++) { - if (new_mfn_list[i] == grub_xen_start_page_addr->console.domU.mfn) + if (xen_state.virt_mfn_list[i] == + grub_xen_start_page_addr->console.domU.mfn) cn_pfn = i; - if (new_mfn_list[i] == grub_xen_start_page_addr->store_mfn) + if (xen_state.virt_mfn_list[i] == grub_xen_start_page_addr->store_mfn) st_pfn = i; } if (cn_pfn == (grub_xen_mfn_t)-1) return grub_error (GRUB_ERR_BUG, "no console"); if (st_pfn == (grub_xen_mfn_t)-1) return grub_error (GRUB_ERR_BUG, "no store"); - t = new_mfn_list[pfn]; - new_mfn_list[pfn] = new_mfn_list[cn_pfn]; - new_mfn_list[cn_pfn] = t; - t = new_mfn_list[pfn + 1]; - new_mfn_list[pfn + 1] = new_mfn_list[st_pfn]; - new_mfn_list[st_pfn] = t; + t = xen_state.virt_mfn_list[pfn]; + xen_state.virt_mfn_list[pfn] = xen_state.virt_mfn_list[cn_pfn]; + xen_state.virt_mfn_list[cn_pfn] = t; + t = xen_state.virt_mfn_list[pfn + 1]; + xen_state.virt_mfn_list[pfn + 1] = xen_state.virt_mfn_list[st_pfn]; + xen_state.virt_mfn_list[st_pfn] = t; - m2p_updates[0].ptr = page2offset (new_mfn_list[pfn]) | MMU_MACHPHYS_UPDATE; + m2p_updates[0].ptr = + page2offset (xen_state.virt_mfn_list[pfn]) | MMU_MACHPHYS_UPDATE; m2p_updates[0].val = pfn; m2p_updates[1].ptr = - page2offset (new_mfn_list[pfn + 1]) | MMU_MACHPHYS_UPDATE; + page2offset (xen_state.virt_mfn_list[pfn + 1]) | MMU_MACHPHYS_UPDATE; m2p_updates[1].val = pfn + 1; m2p_updates[2].ptr = - page2offset (new_mfn_list[cn_pfn]) | MMU_MACHPHYS_UPDATE; + page2offset (xen_state.virt_mfn_list[cn_pfn]) | MMU_MACHPHYS_UPDATE; m2p_updates[2].val = cn_pfn; m2p_updates[3].ptr = - page2offset (new_mfn_list[st_pfn]) | MMU_MACHPHYS_UPDATE; + page2offset (xen_state.virt_mfn_list[st_pfn]) | MMU_MACHPHYS_UPDATE; m2p_updates[3].val = st_pfn; grub_xen_mmu_update (m2p_updates, 4, NULL, DOMID_SELF); @@ -213,43 +217,52 @@ set_mfns (grub_xen_mfn_t * new_mfn_list, grub_xen_mfn_t pfn) } static grub_err_t +grub_xen_p2m_alloc (void) +{ + grub_relocator_chunk_t ch; + grub_size_t p2msize; + grub_err_t err; + + xen_state.state.mfn_list = xen_state.max_addr; + xen_state.next_start.mfn_list = + xen_state.max_addr + xen_state.xen_inf.virt_base; + p2msize = sizeof (grub_xen_mfn_t) * grub_xen_start_page_addr->nr_pages; + err = grub_relocator_alloc_chunk_addr (xen_state.relocator, &ch, + xen_state.max_addr, p2msize); + if (err) + return err; + xen_state.virt_mfn_list = get_virtual_current_address (ch); + grub_memcpy (xen_state.virt_mfn_list, + (void *) grub_xen_start_page_addr->mfn_list, p2msize); + xen_state.max_addr = ALIGN_UP (xen_state.max_addr + p2msize, PAGE_SIZE); + + return GRUB_ERR_NONE; +} + +static grub_err_t grub_xen_boot (void) { - struct grub_relocator_xen_state state; grub_relocator_chunk_t ch; grub_err_t err; - grub_size_t pgtsize; struct start_info *nst; grub_uint64_t nr_info_pages; grub_uint64_t nr_pages, nr_pt_pages, nr_need_pages; struct gnttab_set_version gnttab_setver; - grub_xen_mfn_t *new_mfn_list; grub_size_t i; if (grub_xen_n_allocated_shared_pages) return grub_error (GRUB_ERR_BUG, "active grants"); - state.mfn_list = xen_state.max_addr; - xen_state.next_start.mfn_list = - xen_state.max_addr + xen_state.xen_inf.virt_base; - xen_state.next_start.first_p2m_pfn = xen_state.max_addr >> PAGE_SHIFT; - pgtsize = sizeof (grub_xen_mfn_t) * grub_xen_start_page_addr->nr_pages; - err = grub_relocator_alloc_chunk_addr (xen_state.relocator, &ch, - xen_state.max_addr, pgtsize); - xen_state.next_start.nr_p2m_frames = (pgtsize + PAGE_SIZE - 1) >> PAGE_SHIFT; + err = grub_xen_p2m_alloc (); if (err) return err; - new_mfn_list = get_virtual_current_address (ch); - grub_memcpy (new_mfn_list, - (void *) grub_xen_start_page_addr->mfn_list, pgtsize); - xen_state.max_addr = ALIGN_UP (xen_state.max_addr + pgtsize, PAGE_SIZE); err = grub_relocator_alloc_chunk_addr (xen_state.relocator, &ch, xen_state.max_addr, sizeof (xen_state.next_start)); if (err) return err; - state.start_info = xen_state.max_addr + xen_state.xen_inf.virt_base; + xen_state.state.start_info = xen_state.max_addr + xen_state.xen_inf.virt_base; nst = get_virtual_current_address (ch); xen_state.max_addr = ALIGN_UP (xen_state.max_addr + sizeof (xen_state.next_start), PAGE_SIZE); @@ -262,14 +275,14 @@ grub_xen_boot (void) xen_state.next_start.console.domU = grub_xen_start_page_addr->console.domU; xen_state.next_start.shared_info = grub_xen_start_page_addr->shared_info; - err = set_mfns (new_mfn_list, xen_state.max_addr >> PAGE_SHIFT); + err = set_mfns (xen_state.max_addr >> PAGE_SHIFT); if (err) return err; xen_state.max_addr += 2 * PAGE_SIZE; xen_state.next_start.pt_base = xen_state.max_addr + xen_state.xen_inf.virt_base; - state.paging_start = xen_state.max_addr >> PAGE_SHIFT; + xen_state.state.paging_start = xen_state.max_addr >> PAGE_SHIFT; nr_info_pages = xen_state.max_addr >> PAGE_SHIFT; nr_pages = nr_info_pages; @@ -298,15 +311,15 @@ grub_xen_boot (void) generate_page_table (get_virtual_current_address (ch), xen_state.max_addr >> PAGE_SHIFT, nr_pages, - xen_state.xen_inf.virt_base, new_mfn_list); + xen_state.xen_inf.virt_base, xen_state.virt_mfn_list); xen_state.max_addr += page2offset (nr_pt_pages); - state.stack = xen_state.max_addr + STACK_SIZE + xen_state.xen_inf.virt_base; - state.entry_point = xen_state.xen_inf.entry_point; + xen_state.state.stack = + xen_state.max_addr + STACK_SIZE + xen_state.xen_inf.virt_base; + xen_state.state.entry_point = xen_state.xen_inf.entry_point; - xen_state.next_start.nr_p2m_frames += nr_pt_pages; xen_state.next_start.nr_pt_frames = nr_pt_pages; - state.paging_size = nr_pt_pages; + xen_state.state.paging_size = nr_pt_pages; *nst = xen_state.next_start; @@ -318,7 +331,7 @@ grub_xen_boot (void) for (i = 0; i < ARRAY_SIZE (grub_xen_shared_info->evtchn_pending); i++) grub_xen_shared_info->evtchn_pending[i] = 0; - return grub_relocator_xen_boot (xen_state.relocator, state, nr_pages, + return grub_relocator_xen_boot (xen_state.relocator, xen_state.state, nr_pages, xen_state.xen_inf.virt_base < PAGE_SIZE ? page2offset (nr_pages) : 0, nr_pages - 1, -- 2.6.2 _______________________________________________ Xen-devel mailing list Xen-devel@lists.xen.org http://lists.xen.org/xen-devel
WARNING: multiple messages have this Message-ID (diff)
From: Juergen Gross <jgross@suse.com> To: grub-devel@gnu.org Cc: Juergen Gross <jgross@suse.com>, phcoder@gmail.com, daniel.kiper@oracle.com, mchang@suse.com, xen-devel@lists.xen.org Subject: [PATCH v5 06/11] xen: factor out p2m list allocation into separate function Date: Thu, 25 Feb 2016 12:33:32 +0100 [thread overview] Message-ID: <1456400017-5789-7-git-send-email-jgross@suse.com> (raw) In-Reply-To: <1456400017-5789-1-git-send-email-jgross@suse.com> Do the p2m list allocation of the to be loaded kernel in a separate function. This will allow doing the p2m list allocation at different times of the boot preparations depending on the features the kernel is supporting. While at this remove superfluous setting of first_p2m_pfn and nr_p2m_frames as those are needed only in case of the p2m list not being mapped by the initial kernel mapping. Signed-off-by: Juergen Gross <jgross@suse.com> Reviewed-by: Daniel Kiper <daniel.kiper@oracle.com> --- grub-core/loader/i386/xen.c | 87 ++++++++++++++++++++++++++------------------- 1 file changed, 50 insertions(+), 37 deletions(-) diff --git a/grub-core/loader/i386/xen.c b/grub-core/loader/i386/xen.c index 691c22e..a2fd1f6 100644 --- a/grub-core/loader/i386/xen.c +++ b/grub-core/loader/i386/xen.c @@ -44,8 +44,10 @@ GRUB_MOD_LICENSE ("GPLv3+"); struct xen_loader_state { struct grub_relocator *relocator; + struct grub_relocator_xen_state state; struct start_info next_start; struct grub_xen_file_info xen_inf; + grub_xen_mfn_t *virt_mfn_list; grub_uint64_t max_addr; struct xen_multiboot_mod_list *module_info_page; grub_uint64_t modules_target_start; @@ -170,7 +172,7 @@ generate_page_table (grub_uint64_t *where, grub_uint64_t paging_start, } static grub_err_t -set_mfns (grub_xen_mfn_t * new_mfn_list, grub_xen_mfn_t pfn) +set_mfns (grub_xen_mfn_t pfn) { grub_xen_mfn_t i, t; grub_xen_mfn_t cn_pfn = -1, st_pfn = -1; @@ -179,32 +181,34 @@ set_mfns (grub_xen_mfn_t * new_mfn_list, grub_xen_mfn_t pfn) for (i = 0; i < grub_xen_start_page_addr->nr_pages; i++) { - if (new_mfn_list[i] == grub_xen_start_page_addr->console.domU.mfn) + if (xen_state.virt_mfn_list[i] == + grub_xen_start_page_addr->console.domU.mfn) cn_pfn = i; - if (new_mfn_list[i] == grub_xen_start_page_addr->store_mfn) + if (xen_state.virt_mfn_list[i] == grub_xen_start_page_addr->store_mfn) st_pfn = i; } if (cn_pfn == (grub_xen_mfn_t)-1) return grub_error (GRUB_ERR_BUG, "no console"); if (st_pfn == (grub_xen_mfn_t)-1) return grub_error (GRUB_ERR_BUG, "no store"); - t = new_mfn_list[pfn]; - new_mfn_list[pfn] = new_mfn_list[cn_pfn]; - new_mfn_list[cn_pfn] = t; - t = new_mfn_list[pfn + 1]; - new_mfn_list[pfn + 1] = new_mfn_list[st_pfn]; - new_mfn_list[st_pfn] = t; + t = xen_state.virt_mfn_list[pfn]; + xen_state.virt_mfn_list[pfn] = xen_state.virt_mfn_list[cn_pfn]; + xen_state.virt_mfn_list[cn_pfn] = t; + t = xen_state.virt_mfn_list[pfn + 1]; + xen_state.virt_mfn_list[pfn + 1] = xen_state.virt_mfn_list[st_pfn]; + xen_state.virt_mfn_list[st_pfn] = t; - m2p_updates[0].ptr = page2offset (new_mfn_list[pfn]) | MMU_MACHPHYS_UPDATE; + m2p_updates[0].ptr = + page2offset (xen_state.virt_mfn_list[pfn]) | MMU_MACHPHYS_UPDATE; m2p_updates[0].val = pfn; m2p_updates[1].ptr = - page2offset (new_mfn_list[pfn + 1]) | MMU_MACHPHYS_UPDATE; + page2offset (xen_state.virt_mfn_list[pfn + 1]) | MMU_MACHPHYS_UPDATE; m2p_updates[1].val = pfn + 1; m2p_updates[2].ptr = - page2offset (new_mfn_list[cn_pfn]) | MMU_MACHPHYS_UPDATE; + page2offset (xen_state.virt_mfn_list[cn_pfn]) | MMU_MACHPHYS_UPDATE; m2p_updates[2].val = cn_pfn; m2p_updates[3].ptr = - page2offset (new_mfn_list[st_pfn]) | MMU_MACHPHYS_UPDATE; + page2offset (xen_state.virt_mfn_list[st_pfn]) | MMU_MACHPHYS_UPDATE; m2p_updates[3].val = st_pfn; grub_xen_mmu_update (m2p_updates, 4, NULL, DOMID_SELF); @@ -213,43 +217,52 @@ set_mfns (grub_xen_mfn_t * new_mfn_list, grub_xen_mfn_t pfn) } static grub_err_t +grub_xen_p2m_alloc (void) +{ + grub_relocator_chunk_t ch; + grub_size_t p2msize; + grub_err_t err; + + xen_state.state.mfn_list = xen_state.max_addr; + xen_state.next_start.mfn_list = + xen_state.max_addr + xen_state.xen_inf.virt_base; + p2msize = sizeof (grub_xen_mfn_t) * grub_xen_start_page_addr->nr_pages; + err = grub_relocator_alloc_chunk_addr (xen_state.relocator, &ch, + xen_state.max_addr, p2msize); + if (err) + return err; + xen_state.virt_mfn_list = get_virtual_current_address (ch); + grub_memcpy (xen_state.virt_mfn_list, + (void *) grub_xen_start_page_addr->mfn_list, p2msize); + xen_state.max_addr = ALIGN_UP (xen_state.max_addr + p2msize, PAGE_SIZE); + + return GRUB_ERR_NONE; +} + +static grub_err_t grub_xen_boot (void) { - struct grub_relocator_xen_state state; grub_relocator_chunk_t ch; grub_err_t err; - grub_size_t pgtsize; struct start_info *nst; grub_uint64_t nr_info_pages; grub_uint64_t nr_pages, nr_pt_pages, nr_need_pages; struct gnttab_set_version gnttab_setver; - grub_xen_mfn_t *new_mfn_list; grub_size_t i; if (grub_xen_n_allocated_shared_pages) return grub_error (GRUB_ERR_BUG, "active grants"); - state.mfn_list = xen_state.max_addr; - xen_state.next_start.mfn_list = - xen_state.max_addr + xen_state.xen_inf.virt_base; - xen_state.next_start.first_p2m_pfn = xen_state.max_addr >> PAGE_SHIFT; - pgtsize = sizeof (grub_xen_mfn_t) * grub_xen_start_page_addr->nr_pages; - err = grub_relocator_alloc_chunk_addr (xen_state.relocator, &ch, - xen_state.max_addr, pgtsize); - xen_state.next_start.nr_p2m_frames = (pgtsize + PAGE_SIZE - 1) >> PAGE_SHIFT; + err = grub_xen_p2m_alloc (); if (err) return err; - new_mfn_list = get_virtual_current_address (ch); - grub_memcpy (new_mfn_list, - (void *) grub_xen_start_page_addr->mfn_list, pgtsize); - xen_state.max_addr = ALIGN_UP (xen_state.max_addr + pgtsize, PAGE_SIZE); err = grub_relocator_alloc_chunk_addr (xen_state.relocator, &ch, xen_state.max_addr, sizeof (xen_state.next_start)); if (err) return err; - state.start_info = xen_state.max_addr + xen_state.xen_inf.virt_base; + xen_state.state.start_info = xen_state.max_addr + xen_state.xen_inf.virt_base; nst = get_virtual_current_address (ch); xen_state.max_addr = ALIGN_UP (xen_state.max_addr + sizeof (xen_state.next_start), PAGE_SIZE); @@ -262,14 +275,14 @@ grub_xen_boot (void) xen_state.next_start.console.domU = grub_xen_start_page_addr->console.domU; xen_state.next_start.shared_info = grub_xen_start_page_addr->shared_info; - err = set_mfns (new_mfn_list, xen_state.max_addr >> PAGE_SHIFT); + err = set_mfns (xen_state.max_addr >> PAGE_SHIFT); if (err) return err; xen_state.max_addr += 2 * PAGE_SIZE; xen_state.next_start.pt_base = xen_state.max_addr + xen_state.xen_inf.virt_base; - state.paging_start = xen_state.max_addr >> PAGE_SHIFT; + xen_state.state.paging_start = xen_state.max_addr >> PAGE_SHIFT; nr_info_pages = xen_state.max_addr >> PAGE_SHIFT; nr_pages = nr_info_pages; @@ -298,15 +311,15 @@ grub_xen_boot (void) generate_page_table (get_virtual_current_address (ch), xen_state.max_addr >> PAGE_SHIFT, nr_pages, - xen_state.xen_inf.virt_base, new_mfn_list); + xen_state.xen_inf.virt_base, xen_state.virt_mfn_list); xen_state.max_addr += page2offset (nr_pt_pages); - state.stack = xen_state.max_addr + STACK_SIZE + xen_state.xen_inf.virt_base; - state.entry_point = xen_state.xen_inf.entry_point; + xen_state.state.stack = + xen_state.max_addr + STACK_SIZE + xen_state.xen_inf.virt_base; + xen_state.state.entry_point = xen_state.xen_inf.entry_point; - xen_state.next_start.nr_p2m_frames += nr_pt_pages; xen_state.next_start.nr_pt_frames = nr_pt_pages; - state.paging_size = nr_pt_pages; + xen_state.state.paging_size = nr_pt_pages; *nst = xen_state.next_start; @@ -318,7 +331,7 @@ grub_xen_boot (void) for (i = 0; i < ARRAY_SIZE (grub_xen_shared_info->evtchn_pending); i++) grub_xen_shared_info->evtchn_pending[i] = 0; - return grub_relocator_xen_boot (xen_state.relocator, state, nr_pages, + return grub_relocator_xen_boot (xen_state.relocator, xen_state.state, nr_pages, xen_state.xen_inf.virt_base < PAGE_SIZE ? page2offset (nr_pages) : 0, nr_pages - 1, -- 2.6.2
next prev parent reply other threads:[~2016-02-25 11:33 UTC|newest] Thread overview: 45+ messages / expand[flat|nested] mbox.gz Atom feed top 2016-02-25 11:33 [PATCH v5 00/11] grub-xen: support booting huge pv-domains Juergen Gross 2016-02-25 11:33 ` [PATCH v5 01/11] xen: make xen loader callable multiple times Juergen Gross 2016-02-25 11:33 ` Juergen Gross 2016-02-25 11:33 ` [PATCH v5 02/11] xen: avoid memleaks on error Juergen Gross 2016-02-25 11:33 ` Juergen Gross 2016-02-25 12:14 ` Daniel Kiper 2016-02-25 12:14 ` Daniel Kiper 2016-02-25 11:33 ` [PATCH v5 03/11] xen: reduce number of global variables in xen loader Juergen Gross 2016-02-25 11:33 ` Juergen Gross 2016-02-25 11:33 ` [PATCH v5 04/11] xen: add elfnote.h to avoid using numbers instead of constants Juergen Gross 2016-02-25 11:33 ` Juergen Gross 2016-02-25 11:33 ` [PATCH v5 05/11] xen: synchronize xen header Juergen Gross 2016-02-25 11:33 ` Juergen Gross 2016-02-25 11:33 ` Juergen Gross [this message] 2016-02-25 11:33 ` [PATCH v5 06/11] xen: factor out p2m list allocation into separate function Juergen Gross 2016-02-25 11:33 ` [PATCH v5 07/11] xen: factor out allocation of special pages " Juergen Gross 2016-02-25 11:33 ` Juergen Gross 2016-02-25 11:33 ` [PATCH v5 08/11] xen: factor out allocation of page tables " Juergen Gross 2016-02-25 11:33 ` Juergen Gross 2016-02-25 11:33 ` [PATCH v5 09/11] xen: add capability to load initrd outside of initial mapping Juergen Gross 2016-02-25 11:33 ` Juergen Gross 2016-02-25 12:47 ` Daniel Kiper 2016-02-25 15:33 ` Juergen Gross 2016-02-25 15:33 ` Juergen Gross 2016-02-26 14:00 ` Daniel Kiper 2016-02-26 14:00 ` Daniel Kiper 2016-02-26 14:28 ` Juergen Gross 2016-02-26 15:41 ` Daniel Kiper 2016-02-26 15:41 ` Daniel Kiper 2016-02-29 8:27 ` Juergen Gross 2016-02-29 15:43 ` Daniel Kiper 2016-02-29 15:49 ` Juergen Gross 2016-02-29 16:22 ` Daniel Kiper 2016-02-29 16:22 ` Daniel Kiper 2016-02-29 15:49 ` Juergen Gross 2016-02-29 15:43 ` Daniel Kiper 2016-02-29 8:27 ` Juergen Gross 2016-02-26 14:28 ` Juergen Gross 2016-02-25 12:47 ` Daniel Kiper 2016-02-25 11:33 ` [PATCH v5 10/11] xen: modify page table construction Juergen Gross 2016-02-25 11:33 ` Juergen Gross 2016-02-25 14:45 ` Daniel Kiper 2016-02-25 14:45 ` Daniel Kiper 2016-02-25 11:33 ` [PATCH v5 11/11] xen: add capability to load p2m list outside of kernel mapping Juergen Gross 2016-02-25 11:33 ` Juergen Gross
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