From: "Vladimir 'phcoder' Serbinenko" <phcoder@gmail.com>
To: Daniel Kiper <daniel.kiper@oracle.com>
Cc: "jgross@suse.com" <jgross@suse.com>,
"grub-devel@gnu.org" <grub-devel@gnu.org>,
"eric.snowberg@oracle.com" <eric.snowberg@oracle.com>,
"arvidjaar@gmail.com" <arvidjaar@gmail.com>,
"andrew.cooper3@citrix.com" <andrew.cooper3@citrix.com>,
"cardoe@cardoe.com" <cardoe@cardoe.com>,
"pgnet.dev@gmail.com" <pgnet.dev@gmail.com>,
"roy.franz@linaro.org" <roy.franz@linaro.org>,
"ning.sun@intel.com" <ning.sun@intel.com>,
"david.vrabel@citrix.com" <david.vrabel@citrix.com>,
"jbeulich@suse.com" <jbeulich@suse.com>,
"stefano.stabellini@eu.citrix.com"
<stefano.stabellini@eu.citrix.com>,
"xen-devel@lists.xenproject.org" <xen-devel@lists.xenproject.org>,
"qiaowei.ren@intel.com" <qiaowei.ren@intel.com>,
"richard.l.maliszewski@intel.com"
<richard.l.maliszewski@intel.com>,
"gang.wei@intel.com" <gang.wei@intel.com>,
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"seth.goldberg@oracle.com" <seth>
Subject: Re: [GRUB2 PATCH v3 3/4] multiboot2: Do not pass memory maps to image if EFI boot services are enabled
Date: Thu, 10 Mar 2016 21:28:25 +0100 [thread overview]
Message-ID: <CAEaD8JNNQS-AgTAu=ZBVKnSRtr8TfA3Rymauhn6DktQu5XUX6g@mail.gmail.com> (raw)
In-Reply-To: <1456937500-7855-4-git-send-email-daniel.kiper@oracle.com>
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On Wednesday, March 2, 2016, Daniel Kiper <daniel.kiper@oracle.com> wrote:
> Do not pass memory maps to image if it asked for EFI boot services.
> Main reason for not providing maps is because they will likely be
> invalid. We do a few allocations after filling them, e.g. for relocator
> needs. Usually we do not care as we would already finish boot services.
> If we keep boot services then it is easier to not provide maps. However,
> if image needs memory maps and they are not provided by bootloader then
> it should get them itself just before ExitBootServices() call.
>
Patch gets too cluttered. Can you provide 2 variants: normal (for commit)
and with ignoring whitespaces (for review)
>
> Signed-off-by: Daniel Kiper <daniel.kiper@oracle.com <javascript:;>>
> Reviewed-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com <javascript:;>>
> ---
> v3 - suggestions/fixes:
> - improve commit message
> (suggested by Konrad Rzeszutek Wilk and Vladimir 'phcoder'
> Serbinenko).
> ---
> grub-core/loader/multiboot_mbi2.c | 71
> ++++++++++++++++++-------------------
> 1 file changed, 35 insertions(+), 36 deletions(-)
>
> diff --git a/grub-core/loader/multiboot_mbi2.c
> b/grub-core/loader/multiboot_mbi2.c
> index 7591edc..ce68f48 100644
> --- a/grub-core/loader/multiboot_mbi2.c
> +++ b/grub-core/loader/multiboot_mbi2.c
> @@ -390,7 +390,7 @@ static grub_size_t
> grub_multiboot_get_mbi_size (void)
> {
> #ifdef GRUB_MACHINE_EFI
> - if (!efi_mmap_size)
> + if (!keep_bs && !efi_mmap_size)
> find_efi_mmap_size ();
> #endif
> return 2 * sizeof (grub_uint32_t) + sizeof (struct multiboot_tag)
> @@ -759,12 +759,13 @@ grub_multiboot_make_mbi (grub_uint32_t *target)
> }
> }
>
> - {
> - struct multiboot_tag_mmap *tag = (struct multiboot_tag_mmap *)
> ptrorig;
> - grub_fill_multiboot_mmap (tag);
> - ptrorig += ALIGN_UP (tag->size, MULTIBOOT_TAG_ALIGN)
> - / sizeof (grub_properly_aligned_t);
> - }
> + if (!keep_bs)
> + {
> + struct multiboot_tag_mmap *tag = (struct multiboot_tag_mmap *)
> ptrorig;
> + grub_fill_multiboot_mmap (tag);
> + ptrorig += ALIGN_UP (tag->size, MULTIBOOT_TAG_ALIGN)
> + / sizeof (grub_properly_aligned_t);
> + }
>
> {
> struct multiboot_tag_elf_sections *tag
> @@ -780,18 +781,19 @@ grub_multiboot_make_mbi (grub_uint32_t *target)
> / sizeof (grub_properly_aligned_t);
> }
>
> - {
> - struct multiboot_tag_basic_meminfo *tag
> - = (struct multiboot_tag_basic_meminfo *) ptrorig;
> - tag->type = MULTIBOOT_TAG_TYPE_BASIC_MEMINFO;
> - tag->size = sizeof (struct multiboot_tag_basic_meminfo);
> + if (!keep_bs)
> + {
> + struct multiboot_tag_basic_meminfo *tag
> + = (struct multiboot_tag_basic_meminfo *) ptrorig;
> + tag->type = MULTIBOOT_TAG_TYPE_BASIC_MEMINFO;
> + tag->size = sizeof (struct multiboot_tag_basic_meminfo);
>
> - /* Convert from bytes to kilobytes. */
> - tag->mem_lower = grub_mmap_get_lower () / 1024;
> - tag->mem_upper = grub_mmap_get_upper () / 1024;
> - ptrorig += ALIGN_UP (tag->size, MULTIBOOT_TAG_ALIGN)
> - / sizeof (grub_properly_aligned_t);
> - }
> + /* Convert from bytes to kilobytes. */
> + tag->mem_lower = grub_mmap_get_lower () / 1024;
> + tag->mem_upper = grub_mmap_get_upper () / 1024;
> + ptrorig += ALIGN_UP (tag->size, MULTIBOOT_TAG_ALIGN)
> + / sizeof (grub_properly_aligned_t);
> + }
>
> {
> struct grub_net_network_level_interface *net;
> @@ -890,27 +892,24 @@ grub_multiboot_make_mbi (grub_uint32_t *target)
> grub_efi_uintn_t efi_desc_size;
> grub_efi_uint32_t efi_desc_version;
>
> - tag->type = MULTIBOOT_TAG_TYPE_EFI_MMAP;
> - tag->size = sizeof (*tag) + efi_mmap_size;
> -
> if (!keep_bs)
> - err = grub_efi_finish_boot_services (&efi_mmap_size, tag->efi_mmap,
> NULL,
> - &efi_desc_size,
> &efi_desc_version);
> - else
> {
> - if (grub_efi_get_memory_map (&efi_mmap_size, (void *)
> tag->efi_mmap,
> - NULL,
> - &efi_desc_size, &efi_desc_version) <=
> 0)
> - err = grub_error (GRUB_ERR_IO, "couldn't retrieve memory map");
> + tag->type = MULTIBOOT_TAG_TYPE_EFI_MMAP;
> + tag->size = sizeof (*tag) + efi_mmap_size;
> +
> + err = grub_efi_finish_boot_services (&efi_mmap_size,
> tag->efi_mmap, NULL,
> + &efi_desc_size,
> &efi_desc_version);
> +
> + if (err)
> + return err;
> +
> + tag->descr_size = efi_desc_size;
> + tag->descr_vers = efi_desc_version;
> + tag->size = sizeof (*tag) + efi_mmap_size;
> +
> + ptrorig += ALIGN_UP (tag->size, MULTIBOOT_TAG_ALIGN)
> + / sizeof (grub_properly_aligned_t);
> }
> - if (err)
> - return err;
> - tag->descr_size = efi_desc_size;
> - tag->descr_vers = efi_desc_version;
> - tag->size = sizeof (*tag) + efi_mmap_size;
> -
> - ptrorig += ALIGN_UP (tag->size, MULTIBOOT_TAG_ALIGN)
> - / sizeof (grub_properly_aligned_t);
> }
>
> if (keep_bs)
> --
> 1.7.10.4
>
>
--
Regards
Vladimir 'phcoder' Serbinenko
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next prev parent reply other threads:[~2016-03-10 20:28 UTC|newest]
Thread overview: 30+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-03-02 16:51 [GRUB2 PATCH v3 0/4] multiboot2: Add two extensions Daniel Kiper
2016-03-02 16:51 ` [GRUB2 PATCH v3 1/4] i386/relocator: Add grub_relocator64_efi relocator Daniel Kiper
2016-03-10 20:23 ` Vladimir 'phcoder' Serbinenko
2016-03-11 13:23 ` Daniel Kiper
2016-03-11 15:41 ` Vladimir 'phcoder' Serbinenko
2016-03-11 15:42 ` Vladimir 'phcoder' Serbinenko
2016-03-11 16:40 ` Daniel Kiper
2016-03-02 16:51 ` [GRUB2 PATCH v3 2/4] multiboot2: Add tags used to pass ImageHandle to loaded image Daniel Kiper
2016-03-10 20:26 ` Vladimir 'phcoder' Serbinenko
2016-03-11 13:27 ` Daniel Kiper
2016-03-11 15:39 ` Vladimir 'phcoder' Serbinenko
2016-03-02 16:51 ` [GRUB2 PATCH v3 3/4] multiboot2: Do not pass memory maps to image if EFI boot services are enabled Daniel Kiper
2016-03-10 20:28 ` Vladimir 'phcoder' Serbinenko [this message]
2016-03-11 13:30 ` Daniel Kiper
2016-03-02 16:51 ` [GRUB2 PATCH v3 4/4] multiboot2: Add support for relocatable images Daniel Kiper
2016-03-04 6:51 ` Juergen Gross
2016-03-10 20:42 ` Vladimir 'phcoder' Serbinenko
2016-03-10 20:41 ` Vladimir 'phcoder' Serbinenko
2016-03-11 16:06 ` Daniel Kiper
2016-03-11 16:13 ` Vladimir 'phcoder' Serbinenko
2016-03-14 11:38 ` Daniel Kiper
2016-03-10 20:44 ` Vladimir 'phcoder' Serbinenko
2016-03-11 16:23 ` Daniel Kiper
2016-03-09 10:48 ` [GRUB2 PATCH v3 0/4] multiboot2: Add two extensions Daniel Kiper
2016-03-11 12:27 ` Vladimir 'phcoder' Serbinenko
2016-03-11 13:14 ` Daniel Kiper
2016-03-11 15:44 ` Vladimir 'phcoder' Serbinenko
2016-03-11 16:32 ` Daniel Kiper
2016-03-11 17:33 ` Vladimir 'phcoder' Serbinenko
2016-03-11 17:49 ` Daniel Kiper
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