e1531466e1
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>
102 lines
2.9 KiB
Diff
102 lines
2.9 KiB
Diff
From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
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From: Peter Jones <pjones@redhat.com>
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Date: Fri, 12 Jul 2019 09:53:32 +0200
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Subject: [PATCH] x86-efi: Use bounce buffers for reading to addresses > 4GB
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Lots of machines apparently can't DMA correctly above 4GB during UEFI,
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so use bounce buffers for the initramfs read.
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Signed-off-by: Peter Jones <pjones@redhat.com>
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---
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grub-core/loader/i386/efi/linux.c | 52 +++++++++++++++++++++++++++++++++------
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1 file changed, 45 insertions(+), 7 deletions(-)
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diff --git a/grub-core/loader/i386/efi/linux.c b/grub-core/loader/i386/efi/linux.c
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index 33e981e76e7..2f0336809e7 100644
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--- a/grub-core/loader/i386/efi/linux.c
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+++ b/grub-core/loader/i386/efi/linux.c
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@@ -35,11 +35,16 @@ static grub_dl_t my_mod;
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static int loaded;
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static void *kernel_mem;
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static grub_uint64_t kernel_size;
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-static grub_uint8_t *initrd_mem;
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+static void *initrd_mem;
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static grub_uint32_t handover_offset;
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struct linux_kernel_params *params;
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static char *linux_cmdline;
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+#define MIN(a, b) \
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+ ({ typeof (a) _a = (a); \
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+ typeof (b) _b = (b); \
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+ _a < _b ? _a : _b; })
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+
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#define BYTES_TO_PAGES(bytes) (((bytes) + 0xfff) >> 12)
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static grub_err_t
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@@ -73,6 +78,44 @@ grub_linuxefi_unload (void)
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return GRUB_ERR_NONE;
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}
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+#define BOUNCE_BUFFER_MAX 0x10000000ull
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+
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+static grub_ssize_t
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+read(grub_file_t file, grub_uint8_t *bufp, grub_size_t len)
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+{
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+ grub_ssize_t bufpos = 0;
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+ static grub_size_t bbufsz = 0;
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+ static char *bbuf = NULL;
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+
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+ if (bbufsz == 0)
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+ bbufsz = MIN(BOUNCE_BUFFER_MAX, len);
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+
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+ while (!bbuf && bbufsz)
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+ {
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+ bbuf = grub_malloc(bbufsz);
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+ if (!bbuf)
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+ bbufsz >>= 1;
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+ }
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+ if (!bbuf)
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+ grub_error (GRUB_ERR_OUT_OF_MEMORY, N_("cannot allocate bounce buffer"));
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+
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+ while (bufpos < (long long)len)
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+ {
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+ grub_ssize_t sz;
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+
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+ sz = grub_file_read (file, bbuf, MIN(bbufsz, len - bufpos));
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+ if (sz < 0)
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+ return sz;
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+ if (sz == 0)
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+ break;
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+
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+ grub_memcpy(bufp + bufpos, bbuf, sz);
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+ bufpos += sz;
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+ }
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+
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+ return bufpos;
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+}
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+
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static grub_err_t
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grub_cmd_initrd (grub_command_t cmd __attribute__ ((unused)),
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int argc, char *argv[])
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@@ -126,7 +169,7 @@ grub_cmd_initrd (grub_command_t cmd __attribute__ ((unused)),
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for (i = 0; i < nfiles; i++)
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{
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grub_ssize_t cursize = grub_file_size (files[i]);
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- if (grub_file_read (files[i], ptr, cursize) != cursize)
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+ if (read (files[i], ptr, cursize) != cursize)
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{
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if (!grub_errno)
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grub_error (GRUB_ERR_FILE_READ_ERROR, N_("premature end of file %s"),
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@@ -152,11 +195,6 @@ grub_cmd_initrd (grub_command_t cmd __attribute__ ((unused)),
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return grub_errno;
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}
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-#define MIN(a, b) \
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- ({ typeof (a) _a = (a); \
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- typeof (b) _b = (b); \
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- _a < _b ? _a : _b; })
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-
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static grub_err_t
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grub_cmd_linux (grub_command_t cmd __attribute__ ((unused)),
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int argc, char *argv[])
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