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grub2/0155-x86-efi-Make-our-own-allocator-for-kernel-stuff.patch
Javier Martinez Canillas e1531466e1
Update to grub 2.04 
This change updates grub to the 2.04 release. The new release changed how
grub is built, so the bootstrap and bootstrap.conf files have to be added
to the dist-git. Also, the gitignore file changed so it has to be updated.

Since the patches have been forward ported to 2.04, there's no need for a
logic to maintain a patch with the delta between the release and the grub
master branch. So the release-to-master.patch is dropped and no longer is
updated by the do-rebase script.

Also since gnulib isn't part of the grub repository anymore and cloned by
the boostrap tool, a gnulib tarball is included as other source file and
copied before calling the bootstrap tool. That way grub can be built even
in builders that only have access to the sources lookaside cache.

Resolves: rhbz#1727279

Signed-off-by: Javier Martinez Canillas <javierm@redhat.com>
2019-08-15 08:04:53 +02:00

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From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
From: Peter Jones <pjones@redhat.com>
Date: Wed, 12 Sep 2018 16:03:55 -0400
Subject: [PATCH] x86-efi: Make our own allocator for kernel stuff
This helps enable allocations above 4GB.
Signed-off-by: Peter Jones <pjones@redhat.com>
---
grub-core/loader/i386/efi/linux.c | 167 +++++++++++++++++++++-----------------
1 file changed, 94 insertions(+), 73 deletions(-)
diff --git a/grub-core/loader/i386/efi/linux.c b/grub-core/loader/i386/efi/linux.c
index 5f48fa55619..075b77eb3e4 100644
--- a/grub-core/loader/i386/efi/linux.c
+++ b/grub-core/loader/i386/efi/linux.c
@@ -47,6 +47,65 @@ static char *linux_cmdline;
#define BYTES_TO_PAGES(bytes) (((bytes) + 0xfff) >> 12)
+struct allocation_choice {
+ grub_efi_physical_address_t addr;
+ grub_efi_allocate_type_t alloc_type;
+};
+
+static struct allocation_choice max_addresses[] =
+ {
+ { GRUB_EFI_MAX_ALLOCATION_ADDRESS, GRUB_EFI_ALLOCATE_MAX_ADDRESS },
+ { GRUB_EFI_MAX_ALLOCATION_ADDRESS, GRUB_EFI_ALLOCATE_MAX_ADDRESS },
+ { GRUB_EFI_MAX_ALLOCATION_ADDRESS, GRUB_EFI_ALLOCATE_MAX_ADDRESS },
+ { 0, 0 }
+ };
+
+static inline void
+kernel_free(void *addr, grub_efi_uintn_t size)
+{
+ if (addr && size)
+ grub_efi_free_pages ((grub_efi_physical_address_t)(grub_addr_t)addr,
+ BYTES_TO_PAGES(size));
+}
+
+static void *
+kernel_alloc(grub_efi_uintn_t size, const char * const errmsg)
+{
+ void *addr = 0;
+ unsigned int i;
+ grub_efi_physical_address_t prev_max = 0;
+
+ for (i = 0; max_addresses[i].addr != 0 && addr == 0; i++)
+ {
+ grub_uint64_t max = max_addresses[i].addr;
+ grub_efi_uintn_t pages;
+
+ if (max == prev_max)
+ continue;
+
+ pages = BYTES_TO_PAGES(size);
+ grub_dprintf ("linux", "Trying to allocate %lu pages from %p\n",
+ pages, (void *)max);
+
+ prev_max = max;
+ addr = grub_efi_allocate_pages_real (max, pages,
+ max_addresses[i].alloc_type,
+ GRUB_EFI_LOADER_DATA);
+ if (addr)
+ grub_dprintf ("linux", "Allocated at %p\n", addr);
+ }
+
+ while (grub_error_pop ())
+ {
+ ;
+ }
+
+ if (addr == NULL)
+ grub_error (GRUB_ERR_OUT_OF_MEMORY, errmsg);
+
+ return addr;
+}
+
static grub_err_t
grub_linuxefi_boot (void)
{
@@ -62,19 +121,12 @@ grub_linuxefi_unload (void)
{
grub_dl_unref (my_mod);
loaded = 0;
- if (initrd_mem)
- grub_efi_free_pages ((grub_efi_physical_address_t)(grub_addr_t)initrd_mem,
- BYTES_TO_PAGES(params->ramdisk_size));
- if (linux_cmdline)
- grub_efi_free_pages ((grub_efi_physical_address_t)(grub_addr_t)
- linux_cmdline,
- BYTES_TO_PAGES(params->cmdline_size + 1));
- if (kernel_mem)
- grub_efi_free_pages ((grub_efi_physical_address_t)(grub_addr_t)kernel_mem,
- BYTES_TO_PAGES(kernel_size));
- if (params)
- grub_efi_free_pages ((grub_efi_physical_address_t)(grub_addr_t)params,
- BYTES_TO_PAGES(16384));
+
+ kernel_free(initrd_mem, params->ramdisk_size);
+ kernel_free(linux_cmdline, params->cmdline_size + 1);
+ kernel_free(kernel_mem, kernel_size);
+ kernel_free(params, sizeof(*params));
+
return GRUB_ERR_NONE;
}
@@ -150,19 +202,13 @@ grub_cmd_initrd (grub_command_t cmd __attribute__ ((unused)),
size += ALIGN_UP (grub_file_size (files[i]), 4);
}
- initrd_mem = grub_efi_allocate_pages_max (GRUB_EFI_MAX_ALLOCATION_ADDRESS, BYTES_TO_PAGES(size));
- if (!initrd_mem)
- initrd_mem = grub_efi_allocate_pages_max (GRUB_EFI_MAX_USABLE_ADDRESS, BYTES_TO_PAGES(size));
- if (!initrd_mem)
- {
- grub_error (GRUB_ERR_OUT_OF_MEMORY, N_("can't allocate initrd"));
- goto fail;
- }
-
- grub_dprintf ("linux", "initrd_mem = %lx\n", (unsigned long) initrd_mem);
+ initrd_mem = kernel_alloc(size, N_("can't allocate initrd"));
+ if (initrd_mem == NULL)
+ goto fail;
+ grub_dprintf ("linux", "initrd_mem = %p\n", initrd_mem);
params->ramdisk_size = size;
- params->ramdisk_image = (grub_uint32_t)(grub_addr_t) initrd_mem;
+ params->ramdisk_image = initrd_mem;
ptr = initrd_mem;
@@ -221,7 +267,6 @@ grub_cmd_linux (grub_command_t cmd __attribute__ ((unused)),
filelen = grub_file_size (file);
kernel = grub_malloc(filelen);
-
if (!kernel)
{
grub_error (GRUB_ERR_OUT_OF_MEMORY, N_("cannot allocate kernel buffer"));
@@ -274,7 +319,7 @@ grub_cmd_linux (grub_command_t cmd __attribute__ ((unused)),
goto fail;
}
-#if defined(__x86_64__) || defined(__aarch64__)
+#if defined(__x86_64__)
grub_dprintf ("linux", "checking lh->xloadflags\n");
if (!(lh->xloadflags & LINUX_XLF_KERNEL_64))
{
@@ -293,17 +338,9 @@ grub_cmd_linux (grub_command_t cmd __attribute__ ((unused)),
}
#endif
- params = grub_efi_allocate_pages_max (GRUB_EFI_MAX_ALLOCATION_ADDRESS,
- BYTES_TO_PAGES(sizeof(*params)));
+ params = kernel_alloc (sizeof(*params), "cannot allocate kernel parameters");
if (!params)
- params = grub_efi_allocate_pages_max (GRUB_EFI_MAX_USABLE_ADDRESS,
- BYTES_TO_PAGES(sizeof(*params)));
- if (! params)
- {
- grub_error (GRUB_ERR_OUT_OF_MEMORY, "cannot allocate kernel parameters");
- goto fail;
- }
-
+ goto fail;
grub_dprintf ("linux", "params = %p\n", params);
grub_memset (params, 0, sizeof(*params));
@@ -322,19 +359,10 @@ grub_cmd_linux (grub_command_t cmd __attribute__ ((unused)),
grub_dprintf ("linux", "new lh is at %p\n", lh);
grub_dprintf ("linux", "setting up cmdline\n");
- linux_cmdline = grub_efi_allocate_pages_max(GRUB_EFI_MAX_ALLOCATION_ADDRESS,
- BYTES_TO_PAGES(lh->cmdline_size + 1));
+ linux_cmdline = kernel_alloc (lh->cmdline_size + 1, N_("can't allocate cmdline"));
if (!linux_cmdline)
- linux_cmdline = grub_efi_allocate_pages_max(GRUB_EFI_MAX_USABLE_ADDRESS,
- BYTES_TO_PAGES(lh->cmdline_size + 1));
- if (!linux_cmdline)
- {
- grub_error (GRUB_ERR_OUT_OF_MEMORY, N_("can't allocate cmdline"));
- goto fail;
- }
-
- grub_dprintf ("linux", "linux_cmdline = %lx\n",
- (unsigned long)linux_cmdline);
+ goto fail;
+ grub_dprintf ("linux", "linux_cmdline = %p\n", linux_cmdline);
grub_memcpy (linux_cmdline, LINUX_IMAGE, sizeof (LINUX_IMAGE));
grub_create_loader_cmdline (argc, argv,
@@ -343,27 +371,24 @@ grub_cmd_linux (grub_command_t cmd __attribute__ ((unused)),
GRUB_VERIFY_KERNEL_CMDLINE);
grub_dprintf ("linux", "cmdline:%s\n", linux_cmdline);
- grub_dprintf ("linux", "setting lh->cmd_line_ptr\n");
- lh->cmd_line_ptr = (grub_uint32_t)(grub_addr_t)linux_cmdline;
+ grub_dprintf ("linux", "setting lh->cmd_line_ptr to 0x%08x\n",
+ linux_cmdline);
+ lh->cmd_line_ptr = linux_cmdline;
handover_offset = lh->handover_offset;
- grub_dprintf("linux", "handover_offset: %08x\n", handover_offset);
+ grub_dprintf("linux", "handover_offset: 0x%08x\n", handover_offset);
start = (lh->setup_sects + 1) * 512;
- kernel_mem = grub_efi_allocate_pages_max(lh->pref_address,
- BYTES_TO_PAGES(lh->init_size));
- if (!kernel_mem)
- kernel_mem = grub_efi_allocate_pages_max(GRUB_EFI_MAX_ALLOCATION_ADDRESS,
- BYTES_TO_PAGES(lh->init_size));
- if (!kernel_mem)
- kernel_mem = grub_efi_allocate_pages_max(GRUB_EFI_MAX_USABLE_ADDRESS,
- BYTES_TO_PAGES(lh->init_size));
- if (!kernel_mem)
+ grub_dprintf ("linux", "lh->pref_address: %p\n", (void *)(grub_addr_t)lh->pref_address);
+ if (lh->pref_address < (grub_uint64_t)GRUB_EFI_MAX_ALLOCATION_ADDRESS)
{
- grub_error (GRUB_ERR_OUT_OF_MEMORY, N_("can't allocate kernel"));
- goto fail;
+ max_addresses[0].addr = lh->pref_address;
+ max_addresses[0].alloc_type = GRUB_EFI_ALLOCATE_ADDRESS;
}
+ kernel_mem = kernel_alloc (lh->init_size, N_("can't allocate kernel"));
+ if (!kernel_mem)
+ goto fail;
grub_dprintf("linux", "kernel_mem = %p\n", kernel_mem);
grub_loader_set (grub_linuxefi_boot, grub_linuxefi_unload, 0);
@@ -398,18 +423,14 @@ fail:
loaded = 0;
}
- if (linux_cmdline && lh && !loaded)
- grub_efi_free_pages ((grub_efi_physical_address_t)(grub_addr_t)
- linux_cmdline,
- BYTES_TO_PAGES(lh->cmdline_size + 1));
+ if (!loaded)
+ {
+ if (lh)
+ kernel_free (linux_cmdline, lh->cmdline_size + 1);
- if (kernel_mem && !loaded)
- grub_efi_free_pages ((grub_efi_physical_address_t)(grub_addr_t)kernel_mem,
- BYTES_TO_PAGES(kernel_size));
-
- if (params && !loaded)
- grub_efi_free_pages ((grub_efi_physical_address_t)(grub_addr_t)params,
- BYTES_TO_PAGES(16384));
+ kernel_free (kernel_mem, kernel_size);
+ kernel_free (params, sizeof(*params));
+ }
return grub_errno;
}
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