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[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index] [xen staging] xen/arm: make consider_modules() available for xen relocation
commit f376ff0e4fc642281c49243c4895e31122db6bd2
Author: Carlo Nonato <carlo.nonato@xxxxxxxxxxxxxxx>
AuthorDate: Tue Dec 17 18:06:36 2024 +0100
Commit: Michal Orzel <michal.orzel@xxxxxxx>
CommitDate: Thu Dec 19 19:24:31 2024 +0100
xen/arm: make consider_modules() available for xen relocation
Cache coloring must physically relocate Xen in order to color the hypervisor
and consider_modules() is a key function that is needed to find a new
available physical address.
672d67f339c0 ("xen/arm: Split MMU-specific setup_mm() and related code out")
moved consider_modules() under arm32. Move it to mmu/setup.c and make it
non-static so that it can be used outside.
Signed-off-by: Carlo Nonato <carlo.nonato@xxxxxxxxxxxxxxx>
Reviewed-by: Michal Orzel <michal.orzel@xxxxxxx>
---
xen/arch/arm/arm32/mmu/mm.c | 95 +---------------------------------------
xen/arch/arm/include/asm/setup.h | 3 ++
xen/arch/arm/mmu/setup.c | 94 +++++++++++++++++++++++++++++++++++++++
3 files changed, 98 insertions(+), 94 deletions(-)
diff --git a/xen/arch/arm/arm32/mmu/mm.c b/xen/arch/arm/arm32/mmu/mm.c
index 0824d61323..956693232a 100644
--- a/xen/arch/arm/arm32/mmu/mm.c
+++ b/xen/arch/arm/arm32/mmu/mm.c
@@ -7,6 +7,7 @@
#include <xen/param.h>
#include <xen/pfn.h>
#include <asm/fixmap.h>
+#include <asm/setup.h>
#include <asm/static-memory.h>
#include <asm/static-shmem.h>
@@ -31,100 +32,6 @@ static void __init setup_directmap_mappings(unsigned long
base_mfn,
directmap_virt_end = XENHEAP_VIRT_START + nr_mfns * PAGE_SIZE;
}
-/*
- * Returns the end address of the highest region in the range s..e
- * with required size and alignment that does not conflict with the
- * modules from first_mod to nr_modules.
- *
- * For non-recursive callers first_mod should normally be 0 (all
- * modules and Xen itself) or 1 (all modules but not Xen).
- */
-static paddr_t __init consider_modules(paddr_t s, paddr_t e,
- uint32_t size, paddr_t align,
- int first_mod)
-{
- const struct membanks *reserved_mem = bootinfo_get_reserved_mem();
-#ifdef CONFIG_STATIC_SHM
- const struct membanks *shmem = bootinfo_get_shmem();
-#endif
- const struct bootmodules *mi = &bootinfo.modules;
- int i;
- int nr;
-
- s = (s+align-1) & ~(align-1);
- e = e & ~(align-1);
-
- if ( s > e || e - s < size )
- return 0;
-
- /* First check the boot modules */
- for ( i = first_mod; i < mi->nr_mods; i++ )
- {
- paddr_t mod_s = mi->module[i].start;
- paddr_t mod_e = mod_s + mi->module[i].size;
-
- if ( s < mod_e && mod_s < e )
- {
- mod_e = consider_modules(mod_e, e, size, align, i+1);
- if ( mod_e )
- return mod_e;
-
- return consider_modules(s, mod_s, size, align, i+1);
- }
- }
-
- /*
- * i is the current bootmodule we are evaluating, across all
- * possible kinds of bootmodules.
- *
- * When retrieving the corresponding reserved-memory addresses, we
- * need to index the reserved_mem bank starting from 0, and only counting
- * the reserved-memory modules. Hence, we need to use i - nr.
- */
- nr = mi->nr_mods;
- for ( ; i - nr < reserved_mem->nr_banks; i++ )
- {
- paddr_t r_s = reserved_mem->bank[i - nr].start;
- paddr_t r_e = r_s + reserved_mem->bank[i - nr].size;
-
- if ( s < r_e && r_s < e )
- {
- r_e = consider_modules(r_e, e, size, align, i + 1);
- if ( r_e )
- return r_e;
-
- return consider_modules(s, r_s, size, align, i + 1);
- }
- }
-
-#ifdef CONFIG_STATIC_SHM
- nr += reserved_mem->nr_banks;
- for ( ; i - nr < shmem->nr_banks; i++ )
- {
- paddr_t r_s, r_e;
-
- r_s = shmem->bank[i - nr].start;
-
- /* Shared memory banks can contain INVALID_PADDR as start */
- if ( INVALID_PADDR == r_s )
- continue;
-
- r_e = r_s + shmem->bank[i - nr].size;
-
- if ( s < r_e && r_s < e )
- {
- r_e = consider_modules(r_e, e, size, align, i + 1);
- if ( r_e )
- return r_e;
-
- return consider_modules(s, r_s, size, align, i + 1);
- }
- }
-#endif
-
- return e;
-}
-
/*
* Find a contiguous region that fits in the static heap region with
* required size and alignment, and return the end address of the region
diff --git a/xen/arch/arm/include/asm/setup.h b/xen/arch/arm/include/asm/setup.h
index a5a80d9b47..6cf272c160 100644
--- a/xen/arch/arm/include/asm/setup.h
+++ b/xen/arch/arm/include/asm/setup.h
@@ -81,6 +81,9 @@ struct init_info
unsigned int cpuid;
};
+paddr_t consider_modules(paddr_t s, paddr_t e, uint32_t size, paddr_t align,
+ int first_mod);
+
#endif
/*
* Local variables:
diff --git a/xen/arch/arm/mmu/setup.c b/xen/arch/arm/mmu/setup.c
index 8c87649bc8..041e3fc1b6 100644
--- a/xen/arch/arm/mmu/setup.c
+++ b/xen/arch/arm/mmu/setup.c
@@ -222,6 +222,100 @@ static void xen_pt_enforce_wnx(void)
flush_xen_tlb_local();
}
+/*
+ * Returns the end address of the highest region in the range s..e
+ * with required size and alignment that does not conflict with the
+ * modules from first_mod to nr_modules.
+ *
+ * For non-recursive callers first_mod should normally be 0 (all
+ * modules and Xen itself) or 1 (all modules but not Xen).
+ */
+paddr_t __init consider_modules(paddr_t s, paddr_t e,
+ uint32_t size, paddr_t align,
+ int first_mod)
+{
+ const struct membanks *reserved_mem = bootinfo_get_reserved_mem();
+#ifdef CONFIG_STATIC_SHM
+ const struct membanks *shmem = bootinfo_get_shmem();
+#endif
+ const struct bootmodules *mi = &bootinfo.modules;
+ int i;
+ int nr;
+
+ s = (s+align-1) & ~(align-1);
+ e = e & ~(align-1);
+
+ if ( s > e || e - s < size )
+ return 0;
+
+ /* First check the boot modules */
+ for ( i = first_mod; i < mi->nr_mods; i++ )
+ {
+ paddr_t mod_s = mi->module[i].start;
+ paddr_t mod_e = mod_s + mi->module[i].size;
+
+ if ( s < mod_e && mod_s < e )
+ {
+ mod_e = consider_modules(mod_e, e, size, align, i+1);
+ if ( mod_e )
+ return mod_e;
+
+ return consider_modules(s, mod_s, size, align, i+1);
+ }
+ }
+
+ /*
+ * i is the current bootmodule we are evaluating, across all
+ * possible kinds of bootmodules.
+ *
+ * When retrieving the corresponding reserved-memory addresses, we
+ * need to index the reserved_mem bank starting from 0, and only counting
+ * the reserved-memory modules. Hence, we need to use i - nr.
+ */
+ nr = mi->nr_mods;
+ for ( ; i - nr < reserved_mem->nr_banks; i++ )
+ {
+ paddr_t r_s = reserved_mem->bank[i - nr].start;
+ paddr_t r_e = r_s + reserved_mem->bank[i - nr].size;
+
+ if ( s < r_e && r_s < e )
+ {
+ r_e = consider_modules(r_e, e, size, align, i + 1);
+ if ( r_e )
+ return r_e;
+
+ return consider_modules(s, r_s, size, align, i + 1);
+ }
+ }
+
+#ifdef CONFIG_STATIC_SHM
+ nr += reserved_mem->nr_banks;
+ for ( ; i - nr < shmem->nr_banks; i++ )
+ {
+ paddr_t r_s, r_e;
+
+ r_s = shmem->bank[i - nr].start;
+
+ /* Shared memory banks can contain INVALID_PADDR as start */
+ if ( INVALID_PADDR == r_s )
+ continue;
+
+ r_e = r_s + shmem->bank[i - nr].size;
+
+ if ( s < r_e && r_s < e )
+ {
+ r_e = consider_modules(r_e, e, size, align, i + 1);
+ if ( r_e )
+ return r_e;
+
+ return consider_modules(s, r_s, size, align, i + 1);
+ }
+ }
+#endif
+
+ return e;
+}
+
/*
* Boot-time pagetable setup.
* Changes here may need matching changes in head.S
--
generated by git-patchbot for /home/xen/git/xen.git#staging
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