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[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index] [Xen-changelog] Initial tools support for 32-bit x86 pae.
# HG changeset patch
# User kaf24@xxxxxxxxxxxxxxxxxxxx
# Node ID 57b2fa8bf11da928b39f4971391bdcf1c7953c2c
# Parent 87cfe3f76045d4225a2b626a553c267ef4521890
Initial tools support for 32-bit x86 pae.
Signed-off-by: Gerd Knorr <kraxel@xxxxxxx>
diff -r 87cfe3f76045 -r 57b2fa8bf11d tools/libxc/xc_linux_build.c
--- a/tools/libxc/xc_linux_build.c Wed Jul 13 15:02:49 2005
+++ b/tools/libxc/xc_linux_build.c Wed Jul 13 15:04:49 2005
@@ -21,6 +21,7 @@
#if defined(__i386__)
#define L1_PROT (_PAGE_PRESENT|_PAGE_RW|_PAGE_ACCESSED)
#define L2_PROT (_PAGE_PRESENT|_PAGE_RW|_PAGE_ACCESSED|_PAGE_DIRTY|_PAGE_USER)
+#define L3_PROT (_PAGE_PRESENT)
#endif
#if defined(__x86_64__)
@@ -48,6 +49,214 @@
return 0;
}
+
+#define alloc_pt(ltab, vltab) \
+ ltab = page_array[ppt_alloc++] << PAGE_SHIFT; \
+ if (vltab != NULL) { \
+ munmap(vltab, PAGE_SIZE); \
+ } \
+ if ((vltab = xc_map_foreign_range(xc_handle, dom, PAGE_SIZE, \
+ PROT_READ|PROT_WRITE, \
+ ltab >> PAGE_SHIFT)) == NULL) { \
+ goto error_out; \
+ } \
+ memset(vltab, 0, PAGE_SIZE);
+
+#if defined(__i386__)
+
+static int setup_pg_tables(int xc_handle, u32 dom,
+ vcpu_guest_context_t *ctxt,
+ unsigned long dsi_v_start,
+ unsigned long v_end,
+ unsigned long *page_array,
+ unsigned long vpt_start,
+ unsigned long vpt_end)
+{
+ l1_pgentry_t *vl1tab=NULL, *vl1e=NULL;
+ l2_pgentry_t *vl2tab=NULL, *vl2e=NULL;
+ unsigned long l1tab = 0;
+ unsigned long l2tab = 0;
+ unsigned long ppt_alloc;
+ unsigned long count;
+
+ ppt_alloc = (vpt_start - dsi_v_start) >> PAGE_SHIFT;
+ alloc_pt(l2tab, vl2tab);
+ vl2e = &vl2tab[l2_table_offset(dsi_v_start)];
+ ctxt->ctrlreg[3] = l2tab;
+
+ for ( count = 0; count < ((v_end-dsi_v_start)>>PAGE_SHIFT); count++ )
+ {
+ if ( ((unsigned long)vl1e & (PAGE_SIZE-1)) == 0 )
+ {
+ alloc_pt(l1tab, vl1tab);
+ vl1e = &vl1tab[l1_table_offset(dsi_v_start + (count<<PAGE_SHIFT))];
+ *vl2e++ = l1tab | L2_PROT;
+ }
+
+ *vl1e = (page_array[count] << PAGE_SHIFT) | L1_PROT;
+ if ( (count >= ((vpt_start-dsi_v_start)>>PAGE_SHIFT)) &&
+ (count < ((vpt_end -dsi_v_start)>>PAGE_SHIFT)) )
+ *vl1e &= ~_PAGE_RW;
+ vl1e++;
+ }
+ munmap(vl1tab, PAGE_SIZE);
+ munmap(vl2tab, PAGE_SIZE);
+ return 0;
+
+ error_out:
+ if (vl1tab)
+ munmap(vl1tab, PAGE_SIZE);
+ if (vl2tab)
+ munmap(vl2tab, PAGE_SIZE);
+ return -1;
+}
+
+static int setup_pg_tables_pae(int xc_handle, u32 dom,
+ vcpu_guest_context_t *ctxt,
+ unsigned long dsi_v_start,
+ unsigned long v_end,
+ unsigned long *page_array,
+ unsigned long vpt_start,
+ unsigned long vpt_end)
+{
+ l1_pgentry_64_t *vl1tab=NULL, *vl1e=NULL;
+ l2_pgentry_64_t *vl2tab=NULL, *vl2e=NULL;
+ l3_pgentry_64_t *vl3tab=NULL, *vl3e=NULL;
+ unsigned long l1tab = 0;
+ unsigned long l2tab = 0;
+ unsigned long l3tab = 0;
+ unsigned long ppt_alloc;
+ unsigned long count;
+
+ /* First allocate page for page dir. */
+ ppt_alloc = (vpt_start - dsi_v_start) >> PAGE_SHIFT;
+ alloc_pt(l3tab, vl3tab);
+ vl3e = &vl3tab[l3_table_offset_pae(dsi_v_start)];
+ ctxt->ctrlreg[3] = l3tab;
+
+ for ( count = 0; count < ((v_end-dsi_v_start)>>PAGE_SHIFT); count++)
+ {
+ if ( !((unsigned long)vl1e & (PAGE_SIZE-1)) )
+ {
+ alloc_pt(l1tab, vl1tab);
+
+ if ( !((unsigned long)vl2e & (PAGE_SIZE-1)) )
+ {
+ alloc_pt(l2tab, vl2tab);
+ vl2e = &vl2tab[l2_table_offset_pae(dsi_v_start +
(count<<PAGE_SHIFT))];
+ *vl3e = l2tab | L3_PROT;
+ vl3e++;
+ }
+ vl1e = &vl1tab[l1_table_offset_pae(dsi_v_start +
(count<<PAGE_SHIFT))];
+ *vl2e = l1tab | L2_PROT;
+ vl2e++;
+ }
+
+ *vl1e = (page_array[count] << PAGE_SHIFT) | L1_PROT;
+ if ( (count >= ((vpt_start-dsi_v_start)>>PAGE_SHIFT)) &&
+ (count < ((vpt_end -dsi_v_start)>>PAGE_SHIFT)) )
+ {
+ *vl1e &= ~_PAGE_RW;
+ }
+ vl1e++;
+ }
+
+ munmap(vl1tab, PAGE_SIZE);
+ munmap(vl2tab, PAGE_SIZE);
+ munmap(vl3tab, PAGE_SIZE);
+ return 0;
+
+ error_out:
+ if (vl1tab)
+ munmap(vl1tab, PAGE_SIZE);
+ if (vl2tab)
+ munmap(vl2tab, PAGE_SIZE);
+ if (vl3tab)
+ munmap(vl3tab, PAGE_SIZE);
+ return -1;
+}
+
+#endif
+
+#if defined(__x86_64__)
+
+static int setup_pg_tables_64(int xc_handle, u32 dom,
+ vcpu_guest_context_t *ctxt,
+ unsigned long dsi_v_start,
+ unsigned long v_end,
+ unsigned long *page_array,
+ unsigned long vpt_start,
+ unsigned long vpt_end)
+{
+ l1_pgentry_t *vl1tab=NULL, *vl1e=NULL;
+ l2_pgentry_t *vl2tab=NULL, *vl2e=NULL;
+ l3_pgentry_t *vl3tab=NULL, *vl3e=NULL;
+ l4_pgentry_t *vl4tab=NULL, *vl4e=NULL;
+ unsigned long l2tab = 0;
+ unsigned long l1tab = 0;
+ unsigned long l3tab = 0;
+ unsigned long l4tab = 0;
+ unsigned long ppt_alloc;
+ unsigned long count;
+
+ /* First allocate page for page dir. */
+ ppt_alloc = (vpt_start - dsi_v_start) >> PAGE_SHIFT;
+ alloc_pt(l4tab, vl4tab);
+ vl4e = &vl4tab[l4_table_offset(dsi_v_start)];
+ ctxt->ctrlreg[3] = l4tab;
+
+ for ( count = 0; count < ((v_end-dsi_v_start)>>PAGE_SHIFT); count++)
+ {
+ if ( !((unsigned long)vl1e & (PAGE_SIZE-1)) )
+ {
+ alloc_pt(l1tab, vl1tab);
+
+ if ( !((unsigned long)vl2e & (PAGE_SIZE-1)) )
+ {
+ alloc_pt(l2tab, vl2tab);
+ if ( !((unsigned long)vl3e & (PAGE_SIZE-1)) )
+ {
+ alloc_pt(l3tab, vl3tab);
+ vl3e = &vl3tab[l3_table_offset(dsi_v_start +
(count<<PAGE_SHIFT))];
+ *vl4e = l3tab | L4_PROT;
+ vl4e++;
+ }
+ vl2e = &vl2tab[l2_table_offset(dsi_v_start +
(count<<PAGE_SHIFT))];
+ *vl3e = l2tab | L3_PROT;
+ vl3e++;
+ }
+ vl1e = &vl1tab[l1_table_offset(dsi_v_start + (count<<PAGE_SHIFT))];
+ *vl2e = l1tab | L2_PROT;
+ vl2e++;
+ }
+
+ *vl1e = (page_array[count] << PAGE_SHIFT) | L1_PROT;
+ if ( (count >= ((vpt_start-dsi_v_start)>>PAGE_SHIFT)) &&
+ (count < ((vpt_end -dsi_v_start)>>PAGE_SHIFT)) )
+ {
+ *vl1e &= ~_PAGE_RW;
+ }
+ vl1e++;
+ }
+
+ munmap(vl1tab, PAGE_SIZE);
+ munmap(vl2tab, PAGE_SIZE);
+ munmap(vl3tab, PAGE_SIZE);
+ munmap(vl4tab, PAGE_SIZE);
+ return 0;
+
+ error_out:
+ if (vl1tab)
+ munmap(vl1tab, PAGE_SIZE);
+ if (vl2tab)
+ munmap(vl2tab, PAGE_SIZE);
+ if (vl3tab)
+ munmap(vl3tab, PAGE_SIZE);
+ if (vl4tab)
+ munmap(vl4tab, PAGE_SIZE);
+ return -1;
+}
+#endif
static int setup_guest(int xc_handle,
u32 dom,
@@ -63,19 +272,7 @@
unsigned int vcpus,
unsigned int store_evtchn, unsigned long *store_mfn)
{
- l1_pgentry_t *vl1tab=NULL, *vl1e=NULL;
- l2_pgentry_t *vl2tab=NULL, *vl2e=NULL;
-#if defined(__x86_64__)
- l3_pgentry_t *vl3tab=NULL, *vl3e=NULL;
- l4_pgentry_t *vl4tab=NULL, *vl4e=NULL;
-#endif
unsigned long *page_array = NULL;
- unsigned long l2tab = 0;
- unsigned long l1tab = 0;
-#if defined(__x86_64__)
- unsigned long l3tab = 0;
- unsigned long l4tab = 0;
-#endif
unsigned long count, i;
start_info_t *start_info;
shared_info_t *shared_info;
@@ -83,7 +280,7 @@
int rc;
unsigned long nr_pt_pages;
- unsigned long ppt_alloc, physmap_pfn;
+ unsigned long physmap_pfn;
u32 *physmap, *physmap_e;
struct load_funcs load_funcs;
@@ -144,9 +341,16 @@
if ( (v_end - vstack_end) < (512UL << 10) )
v_end += 1UL << 22; /* Add extra 4MB to get >= 512kB padding. */
#if defined(__i386__)
- if ( (((v_end - dsi.v_start + ((1<<L2_PAGETABLE_SHIFT)-1)) >>
- L2_PAGETABLE_SHIFT) + 1) <= nr_pt_pages )
- break;
+ if (dsi.pae_kernel) {
+ /* FIXME: assumes one L2 pgtable @ 0xc0000000 */
+ if ( (((v_end - dsi.v_start + ((1<<L2_PAGETABLE_SHIFT_PAE)-1)) >>
+ L2_PAGETABLE_SHIFT_PAE) + 2) <= nr_pt_pages )
+ break;
+ } else {
+ if ( (((v_end - dsi.v_start + ((1<<L2_PAGETABLE_SHIFT)-1)) >>
+ L2_PAGETABLE_SHIFT) + 1) <= nr_pt_pages )
+ break;
+ }
#endif
#if defined(__x86_64__)
#define NR(_l,_h,_s) \
@@ -225,114 +429,25 @@
if ( (mmu = init_mmu_updates(xc_handle, dom)) == NULL )
goto error_out;
+ /* setup page tables */
#if defined(__i386__)
- /* First allocate page for page dir. */
- ppt_alloc = (vpt_start - dsi.v_start) >> PAGE_SHIFT;
- l2tab = page_array[ppt_alloc++] << PAGE_SHIFT;
- ctxt->ctrlreg[3] = l2tab;
-
- /* Initialise the page tables. */
- if ( (vl2tab = xc_map_foreign_range(xc_handle, dom, PAGE_SIZE,
- PROT_READ|PROT_WRITE,
- l2tab >> PAGE_SHIFT)) == NULL )
- goto error_out;
- memset(vl2tab, 0, PAGE_SIZE);
- vl2e = &vl2tab[l2_table_offset(dsi.v_start)];
- for ( count = 0; count < ((v_end-dsi.v_start)>>PAGE_SHIFT); count++ )
- {
- if ( ((unsigned long)vl1e & (PAGE_SIZE-1)) == 0 )
- {
- l1tab = page_array[ppt_alloc++] << PAGE_SHIFT;
- if ( vl1tab != NULL )
- munmap(vl1tab, PAGE_SIZE);
- if ( (vl1tab = xc_map_foreign_range(xc_handle, dom, PAGE_SIZE,
- PROT_READ|PROT_WRITE,
- l1tab >> PAGE_SHIFT)) == NULL )
- {
- munmap(vl2tab, PAGE_SIZE);
- goto error_out;
- }
- memset(vl1tab, 0, PAGE_SIZE);
- vl1e = &vl1tab[l1_table_offset(dsi.v_start + (count<<PAGE_SHIFT))];
- *vl2e++ = l1tab | L2_PROT;
- }
-
- *vl1e = (page_array[count] << PAGE_SHIFT) | L1_PROT;
- if ( (count >= ((vpt_start-dsi.v_start)>>PAGE_SHIFT)) &&
- (count < ((vpt_end -dsi.v_start)>>PAGE_SHIFT)) )
- *vl1e &= ~_PAGE_RW;
- vl1e++;
- }
- munmap(vl1tab, PAGE_SIZE);
- munmap(vl2tab, PAGE_SIZE);
+ if (dsi.pae_kernel)
+ rc = setup_pg_tables_pae(xc_handle, dom, ctxt,
+ dsi.v_start, v_end,
+ page_array, vpt_start, vpt_end);
+ else {
+ rc = setup_pg_tables(xc_handle, dom, ctxt,
+ dsi.v_start, v_end,
+ page_array, vpt_start, vpt_end);
+ }
#endif
#if defined(__x86_64__)
-
-#define alloc_pt(ltab, vltab) \
- ltab = page_array[ppt_alloc++] << PAGE_SHIFT; \
- if (vltab != NULL) { \
- munmap(vltab, PAGE_SIZE); \
- } \
- if ((vltab = xc_map_foreign_range(xc_handle, dom, PAGE_SIZE, \
- PROT_READ|PROT_WRITE, \
- ltab >> PAGE_SHIFT)) == NULL) { \
- munmap(vltab, PAGE_SIZE); \
- goto error_out; \
- } \
- memset(vltab, 0, PAGE_SIZE);
-
- /* First allocate page for page dir. */
- ppt_alloc = (vpt_start - dsi.v_start) >> PAGE_SHIFT;
- l4tab = page_array[ppt_alloc++] << PAGE_SHIFT;
- ctxt->ctrlreg[3] = l4tab;
-
- /* Intiliaize page table */
- if ( (vl4tab = xc_map_foreign_range(xc_handle, dom, PAGE_SIZE,
- PROT_READ|PROT_WRITE,
- l4tab >> PAGE_SHIFT)) == NULL )
- goto error_out;
- memset(vl4tab, 0, PAGE_SIZE);
- vl4e = &vl4tab[l4_table_offset(dsi.v_start)];
-
- for ( count = 0; count < ((v_end-dsi.v_start)>>PAGE_SHIFT); count++)
- {
- if ( !((unsigned long)vl1e & (PAGE_SIZE-1)) )
- {
- alloc_pt(l1tab, vl1tab);
-
- if ( !((unsigned long)vl2e & (PAGE_SIZE-1)) )
- {
- alloc_pt(l2tab, vl2tab);
- if ( !((unsigned long)vl3e & (PAGE_SIZE-1)) )
- {
- alloc_pt(l3tab, vl3tab);
- vl3e = &vl3tab[l3_table_offset(dsi.v_start +
(count<<PAGE_SHIFT))];
- *vl4e = l3tab | L4_PROT;
- vl4e++;
- }
- vl2e = &vl2tab[l2_table_offset(dsi.v_start +
(count<<PAGE_SHIFT))];
- *vl3e = l2tab | L3_PROT;
- vl3e++;
- }
- vl1e = &vl1tab[l1_table_offset(dsi.v_start + (count<<PAGE_SHIFT))];
- *vl2e = l1tab | L2_PROT;
- vl2e++;
- }
-
- *vl1e = (page_array[count] << PAGE_SHIFT) | L1_PROT;
- if ( (count >= ((vpt_start-dsi.v_start)>>PAGE_SHIFT)) &&
- (count < ((vpt_end -dsi.v_start)>>PAGE_SHIFT)) )
- {
- *vl1e &= ~_PAGE_RW;
- }
- vl1e++;
- }
-
- munmap(vl1tab, PAGE_SIZE);
- munmap(vl2tab, PAGE_SIZE);
- munmap(vl3tab, PAGE_SIZE);
- munmap(vl4tab, PAGE_SIZE);
-#endif
+ rc = setup_pg_tables_64(xc_handle, dom, ctxt,
+ dsi.v_start, v_end,
+ page_array, vpt_start, vpt_end);
+#endif
+ if (0 != rc)
+ goto error_out;
/* Write the phys->machine and machine->phys table entries. */
physmap_pfn = (vphysmap_start - dsi.v_start) >> PAGE_SHIFT;
@@ -363,9 +478,16 @@
/*
* Pin down l2tab addr as page dir page - causes hypervisor to provide
* correct protection for the page
- */
- if ( pin_table(xc_handle, MMUEXT_PIN_L2_TABLE, l2tab>>PAGE_SHIFT, dom) )
- goto error_out;
+ */
+ if (dsi.pae_kernel) {
+ if ( pin_table(xc_handle, MMUEXT_PIN_L3_TABLE,
+ ctxt->ctrlreg[3] >> PAGE_SHIFT, dom) )
+ goto error_out;
+ } else {
+ if ( pin_table(xc_handle, MMUEXT_PIN_L2_TABLE,
+ ctxt->ctrlreg[3] >> PAGE_SHIFT, dom) )
+ goto error_out;
+ }
#endif
#if defined(__x86_64__)
@@ -373,9 +495,11 @@
* Pin down l4tab addr as page dir page - causes hypervisor to provide
* correct protection for the page
*/
- if ( pin_table(xc_handle, MMUEXT_PIN_L4_TABLE, l4tab>>PAGE_SHIFT, dom) )
- goto error_out;
-#endif
+ if ( pin_table(xc_handle, MMUEXT_PIN_L4_TABLE,
+ ctxt->ctrlreg[3] >> PAGE_SHIFT, dom) )
+ goto error_out;
+#endif
+
start_info = xc_map_foreign_range(
xc_handle, dom, PAGE_SIZE, PROT_READ|PROT_WRITE,
page_array[(vstartinfo_start-dsi.v_start)>>PAGE_SHIFT]);
diff -r 87cfe3f76045 -r 57b2fa8bf11d tools/libxc/xc_load_elf.c
--- a/tools/libxc/xc_load_elf.c Wed Jul 13 15:02:49 2005
+++ b/tools/libxc/xc_load_elf.c Wed Jul 13 15:04:49 2005
@@ -115,6 +115,8 @@
ERROR("Actually saw: '%s'", guestinfo);
return -EINVAL;
}
+ if ( (strstr(guestinfo, "PAE=yes") != NULL) )
+ dsi->pae_kernel = 1;
break;
}
diff -r 87cfe3f76045 -r 57b2fa8bf11d tools/libxc/xc_private.h
--- a/tools/libxc/xc_private.h Wed Jul 13 15:02:49 2005
+++ b/tools/libxc/xc_private.h Wed Jul 13 15:04:49 2005
@@ -32,6 +32,9 @@
#if defined(__i386__)
#define L1_PAGETABLE_SHIFT 12
#define L2_PAGETABLE_SHIFT 22
+#define L1_PAGETABLE_SHIFT_PAE 12
+#define L2_PAGETABLE_SHIFT_PAE 21
+#define L3_PAGETABLE_SHIFT_PAE 30
#elif defined(__x86_64__)
#define L1_PAGETABLE_SHIFT 12
#define L2_PAGETABLE_SHIFT 21
@@ -42,6 +45,9 @@
#if defined(__i386__)
#define ENTRIES_PER_L1_PAGETABLE 1024
#define ENTRIES_PER_L2_PAGETABLE 1024
+#define L1_PAGETABLE_ENTRIES_PAE 512
+#define L2_PAGETABLE_ENTRIES_PAE 512
+#define L3_PAGETABLE_ENTRIES_PAE 4
#elif defined(__x86_64__)
#define L1_PAGETABLE_ENTRIES 512
#define L2_PAGETABLE_ENTRIES 512
@@ -55,6 +61,9 @@
typedef u32 l1_pgentry_32_t;
typedef u32 l2_pgentry_32_t;
+typedef u64 l1_pgentry_64_t;
+typedef u64 l2_pgentry_64_t;
+typedef u64 l3_pgentry_64_t;
typedef unsigned long l1_pgentry_t;
typedef unsigned long l2_pgentry_t;
#if defined(__x86_64__)
@@ -67,6 +76,12 @@
(((_a) >> L1_PAGETABLE_SHIFT) & (ENTRIES_PER_L1_PAGETABLE - 1))
#define l2_table_offset(_a) \
((_a) >> L2_PAGETABLE_SHIFT)
+#define l1_table_offset_pae(_a) \
+ (((_a) >> L1_PAGETABLE_SHIFT_PAE) & (L1_PAGETABLE_ENTRIES_PAE - 1))
+#define l2_table_offset_pae(_a) \
+ (((_a) >> L2_PAGETABLE_SHIFT_PAE) & (L2_PAGETABLE_ENTRIES_PAE - 1))
+#define l3_table_offset_pae(_a) \
+ (((_a) >> L3_PAGETABLE_SHIFT_PAE) & (L3_PAGETABLE_ENTRIES_PAE - 1))
#elif defined(__x86_64__)
#define l1_table_offset(_a) \
(((_a) >> L1_PAGETABLE_SHIFT) & (L1_PAGETABLE_ENTRIES - 1))
@@ -87,6 +102,7 @@
unsigned long v_kernentry;
unsigned int load_symtab;
+ unsigned int pae_kernel;
unsigned long symtab_addr;
unsigned long symtab_len;
};
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