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Re: [PATCH v5 34/44] x86/boot: drop the use of initial_images unit global


  • To: Jason Andryuk <jason.andryuk@xxxxxxx>, xen-devel@xxxxxxxxxxxxxxxxxxxx
  • From: "Daniel P. Smith" <dpsmith@xxxxxxxxxxxxxxxxxxxx>
  • Date: Wed, 9 Oct 2024 19:22:12 -0400
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  • Cc: christopher.w.clark@xxxxxxxxx, stefano.stabellini@xxxxxxx, Jan Beulich <jbeulich@xxxxxxxx>, Andrew Cooper <andrew.cooper3@xxxxxxxxxx>, Roger Pau Monné <roger.pau@xxxxxxxxxx>
  • Delivery-date: Wed, 09 Oct 2024 23:22:30 +0000
  • List-id: Xen developer discussion <xen-devel.lists.xenproject.org>

On 10/8/24 15:04, Jason Andryuk wrote:
On 2024-10-06 17:49, Daniel P. Smith wrote:
Signed-off-by: Daniel P. Smith <dpsmith@xxxxxxxxxxxxxxxxxxxx>
---
  xen/arch/x86/setup.c | 13 ++++---------
  1 file changed, 4 insertions(+), 9 deletions(-)

diff --git a/xen/arch/x86/setup.c b/xen/arch/x86/setup.c
index 30a139074833..b3b6e6f38622 100644
--- a/xen/arch/x86/setup.c
+++ b/xen/arch/x86/setup.c
@@ -276,8 +276,6 @@ custom_param("acpi", parse_acpi_param);
  static const char *cmdline_cook(const char *p, const char *loader_name);
-static const struct boot_module *__initdata initial_images;
-
  struct boot_info __initdata xen_boot_info;
  static struct boot_info __init *multiboot_fill_boot_info(unsigned long mbi_p) @@ -336,9 +334,9 @@ unsigned long __init initial_images_nrpages(nodeid_t node)
      for ( nr = i = 0; i < bi->nr_modules; ++i )
      {
-        unsigned long start = initial_images[i].mod->mod_start;
+        unsigned long start = bi->mods[i].mod->mod_start;
          unsigned long end = start +
-                            PFN_UP(initial_images[i].mod->mod_end);
+                            PFN_UP(bi->mods[i].mod->mod_end);

Fits on a single line.

Ack.

          if ( end > node_start && node_end > start )
              nr += min(node_end, end) - max(node_start, start);
@@ -355,15 +353,14 @@ void __init discard_initial_images(void)
      for ( i = 0; i < bi->nr_modules; ++i )
      {
          uint64_t start =
-            (uint64_t)initial_images[i].mod->mod_start << PAGE_SHIFT;
+            (uint64_t)bi->mods[i].mod->mod_start << PAGE_SHIFT;

Fits on one line.  Can also be pfn_to_paddr(), which applies to earlier patches.  Having said that, maybe it's okay to skip pfn_to_paddr as at the end of the series mods[i].start is used without a shift.  i.e. fewer transformations in these "mechanical" changes make review easier. Unless someone else wants pfn_to_addr(), I am okay without that conversion.

After I did a few based on a comment from Jan on v4, I realized I am making changes that just go away or shift to a different conversion macro. I would prefer to just leave them to the end and make sure that when arriving at the final form, none of them are using any open coded forms.

I will move it up to a single line.

          init_domheap_pages(start,
                             start +
-                           PAGE_ALIGN(initial_images[i].mod->mod_end));
+                           PAGE_ALIGN(bi->mods[i].mod->mod_end));

One line.

Ack.

      }
      bi->nr_modules = 0;
-    initial_images = NULL;
  }
  static void __init init_idle_domain(void)

With the line fixups:

Reviewed-by: Jason Andryuk <jason.andryuk@xxxxxxx>

Thanks!

v/r,
dps



 


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