From: Wei Liu <wei.liu2@citrix.com>
To: Xen-devel <xen-devel@lists.xenproject.org>
Cc: George Dunlap <george.dunlap@eu.citrix.com>,
Andrew Cooper <andrew.cooper3@citrix.com>,
Wei Liu <wei.liu2@citrix.com>, Jan Beulich <JBeulich@suse.com>
Subject: [PATCH v3 19/21] x86/mm: factor out pv_arch_init_memory
Date: Thu, 20 Jul 2017 17:04:24 +0100 [thread overview]
Message-ID: <20170720160426.2343-20-wei.liu2@citrix.com> (raw)
In-Reply-To: <20170720160426.2343-1-wei.liu2@citrix.com>
Move the split l4 setup code into the new function. The new function
is also going to contain other PV specific setup code in later patch.
Signed-off-by: Wei Liu <wei.liu2@citrix.com>
---
xen/arch/x86/mm.c | 73 ++++++++++++++++++++++++++++++-------------------------
1 file changed, 40 insertions(+), 33 deletions(-)
diff --git a/xen/arch/x86/mm.c b/xen/arch/x86/mm.c
index 109a109155..c7c989d8f8 100644
--- a/xen/arch/x86/mm.c
+++ b/xen/arch/x86/mm.c
@@ -259,6 +259,45 @@ static l4_pgentry_t __read_mostly split_l4e;
#define root_pgt_pv_xen_slots ROOT_PAGETABLE_PV_XEN_SLOTS
#endif
+static void pv_arch_init_memory(void)
+{
+#ifndef NDEBUG
+ unsigned int i;
+
+ if ( highmem_start )
+ {
+ unsigned long split_va = (unsigned long)__va(highmem_start);
+
+ if ( split_va < HYPERVISOR_VIRT_END &&
+ split_va - 1 == (unsigned long)__va(highmem_start - 1) )
+ {
+ root_pgt_pv_xen_slots = l4_table_offset(split_va) -
+ ROOT_PAGETABLE_FIRST_XEN_SLOT;
+ ASSERT(root_pgt_pv_xen_slots < ROOT_PAGETABLE_PV_XEN_SLOTS);
+ if ( l4_table_offset(split_va) == l4_table_offset(split_va - 1) )
+ {
+ l3_pgentry_t *l3tab = alloc_xen_pagetable();
+
+ if ( l3tab )
+ {
+ const l3_pgentry_t *l3idle =
+ l4e_to_l3e(idle_pg_table[l4_table_offset(split_va)]);
+
+ for ( i = 0; i < l3_table_offset(split_va); ++i )
+ l3tab[i] = l3idle[i];
+ for ( ; i < L3_PAGETABLE_ENTRIES; ++i )
+ l3tab[i] = l3e_empty();
+ split_l4e = l4e_from_pfn(virt_to_mfn(l3tab),
+ __PAGE_HYPERVISOR_RW);
+ }
+ else
+ ++root_pgt_pv_xen_slots;
+ }
+ }
+ }
+#endif
+}
+
void __init arch_init_memory(void)
{
unsigned long i, pfn, rstart_pfn, rend_pfn, iostart_pfn, ioend_pfn;
@@ -353,39 +392,7 @@ void __init arch_init_memory(void)
mem_sharing_init();
-#ifndef NDEBUG
- if ( highmem_start )
- {
- unsigned long split_va = (unsigned long)__va(highmem_start);
-
- if ( split_va < HYPERVISOR_VIRT_END &&
- split_va - 1 == (unsigned long)__va(highmem_start - 1) )
- {
- root_pgt_pv_xen_slots = l4_table_offset(split_va) -
- ROOT_PAGETABLE_FIRST_XEN_SLOT;
- ASSERT(root_pgt_pv_xen_slots < ROOT_PAGETABLE_PV_XEN_SLOTS);
- if ( l4_table_offset(split_va) == l4_table_offset(split_va - 1) )
- {
- l3_pgentry_t *l3tab = alloc_xen_pagetable();
-
- if ( l3tab )
- {
- const l3_pgentry_t *l3idle =
- l4e_to_l3e(idle_pg_table[l4_table_offset(split_va)]);
-
- for ( i = 0; i < l3_table_offset(split_va); ++i )
- l3tab[i] = l3idle[i];
- for ( ; i < L3_PAGETABLE_ENTRIES; ++i )
- l3tab[i] = l3e_empty();
- split_l4e = l4e_from_pfn(virt_to_mfn(l3tab),
- __PAGE_HYPERVISOR_RW);
- }
- else
- ++root_pgt_pv_xen_slots;
- }
- }
- }
-#endif
+ pv_arch_init_memory();
}
int page_is_ram_type(unsigned long mfn, unsigned long mem_type)
--
2.11.0
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next prev parent reply other threads:[~2017-07-20 16:16 UTC|newest]
Thread overview: 39+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-07-20 16:04 [PATCH v3 00/21] x86: refactor mm.c (the easy part) Wei Liu
2017-07-20 16:04 ` [PATCH v3 01/21] x86/mm: carve out create_grant_pv_mapping Wei Liu
2017-08-28 15:16 ` George Dunlap
2017-07-20 16:04 ` [PATCH v3 02/21] x86/mm: carve out replace_grant_pv_mapping Wei Liu
2017-08-28 15:19 ` George Dunlap
2017-07-20 16:04 ` [PATCH v3 03/21] x86/mm: split HVM grant table code to hvm/grant_table.c Wei Liu
2017-07-20 16:04 ` [PATCH v3 04/21] x86/mm: lift PAGE_CACHE_ATTRS to page.h Wei Liu
2017-07-20 16:04 ` [PATCH v3 05/21] x86/mm: document the return values from get_page_from_l*e Wei Liu
2017-07-20 16:04 ` [PATCH v3 06/21] x86: move pv_emul_is_mem_write to pv/emulate.c Wei Liu
2017-07-20 16:04 ` [PATCH v3 07/21] x86/mm: move and rename guest_get_eff{, kern}_l1e Wei Liu
2017-07-20 16:04 ` [PATCH v3 08/21] x86/mm: export get_page_from_pagenr Wei Liu
2017-07-20 16:04 ` [PATCH v3 09/21] x86/mm: rename and move update_intpte Wei Liu
2017-07-20 16:04 ` [PATCH v3 10/21] x86/mm: move {un, }adjust_guest_* to pv/mm.h Wei Liu
2017-07-20 16:04 ` [PATCH v3 11/21] x86/mm: split out writable pagetable emulation code Wei Liu
2017-07-20 16:04 ` [PATCH v3 12/21] x86/mm: split out readonly MMIO " Wei Liu
2017-07-20 16:04 ` [PATCH v3 13/21] x86/mm: remove the unused inclusion of pv/emulate.h Wei Liu
2017-07-20 16:04 ` [PATCH v3 14/21] x86/mm: move and rename guest_{, un}map_l1e Wei Liu
2017-07-20 16:04 ` [PATCH v3 15/21] x86/mm: split out PV grant table code Wei Liu
2017-07-20 16:04 ` [PATCH v3 16/21] x86/mm: split out descriptor " Wei Liu
2017-07-20 16:04 ` [PATCH v3 17/21] x86/mm: move compat descriptor handling code Wei Liu
2017-07-20 16:04 ` [PATCH v3 18/21] x86/mm: move and rename map_ldt_shadow_page Wei Liu
2017-07-20 16:04 ` Wei Liu [this message]
2017-07-20 16:04 ` [PATCH v3 20/21] x86/mm: move l4 table setup code Wei Liu
2017-07-20 16:04 ` [PATCH v3 21/21] x86/mm: add "pv_" prefix to new_guest_cr3 Wei Liu
2017-07-30 6:26 ` [PATCH v3 00/21] x86: refactor mm.c (the easy part) Jan Beulich
2017-07-30 9:23 ` Wei Liu
2017-07-30 15:43 ` [PATCH v3 extra 00/11] x86: refactor mm.c: page APIs and hypercalls Wei Liu
2017-07-30 15:43 ` [PATCH v3 extra 01/11] x86: add pv_ prefix to {alloc, free}_page_type Wei Liu
2017-07-30 15:43 ` [PATCH v3 extra 02/11] x86/mm: export more get/put page functions Wei Liu
2017-07-30 15:43 ` [PATCH v3 extra 03/11] x86/mm: move and add pv_ prefix to create_pae_xen_mappings Wei Liu
2017-07-30 15:43 ` [PATCH v3 extra 04/11] x86/mm: move disallow_mask variable and macros Wei Liu
2017-07-30 15:43 ` [PATCH v3 extra 05/11] x86/mm: move pv_{alloc, free}_page_type Wei Liu
2017-07-30 15:43 ` [PATCH v3 extra 06/11] x86/mm: move and add pv_ prefix to invalidate_shadow_ldt Wei Liu
2017-07-30 15:43 ` [PATCH v3 extra 07/11] x86/mm: move PV hypercalls to pv/mm-hypercalls.c Wei Liu
2017-07-30 15:43 ` [PATCH v3 extra 08/11] x86/mm: remove the now unused inclusion of pv/mm.h Wei Liu
2017-07-30 15:43 ` [PATCH v3 extra 09/11] x86/mm: use put_page_type_preemptible in put_page_from_l{2, 3}e Wei Liu
2017-07-30 15:43 ` [PATCH v3 extra 10/11] x86/mm: move {get, put}_page_from_l{2, 3, 4}e Wei Liu
2017-07-30 15:43 ` [PATCH v3 extra 11/11] x86/mm: move description of x86 page table API to pv/mm.c Wei Liu
2017-07-31 9:58 ` [PATCH v3 extra 00/11] x86: refactor mm.c: page APIs and hypercalls Jan Beulich
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