From: Borislav Petkov <bp@alien8.de>
To: Vivek Goyal <vgoyal@redhat.com>
Cc: matthew.garrett@nebula.com, zohar@linux.vnet.ibm.com,
d.kasatkin@samsung.com, kexec@lists.infradead.org,
linux-kernel@vger.kernel.org,
linux-security-module@vger.kernel.org, ebiederm@xmission.com,
"H. Peter Anvin" <hpa@zytor.com>,
akpm@linux-foundation.org, Dave Young <dyoung@redhat.com>
Subject: Re: [PATCH 15/16] bootparam: Pass acpi_rsdp pointer in bootparam
Date: Thu, 12 Sep 2013 16:25:37 +0200 [thread overview]
Message-ID: <20130912142537.GA10143@x1.alien8.de> (raw)
In-Reply-To: <20130912131930.GC28500@redhat.com>
On Thu, Sep 12, 2013 at 09:19:30AM -0400, Vivek Goyal wrote:
> I did not understand this argument that we need to use high virtual
> addresses because windows is using it and now we end up creating
> fixed EFI addresses and that becomes an ABI. If EFI implementations
The only thing that becomes sort-of ABI is that we start the mappings at
-4G virtual.
> are dependent on high addresses being passed, shouldn't it be those
> implementations which need to be fixed instead of kernel fixing EFI
Right, this is the biggest issue with firmware - vendors like to declare
those as End-of-Life platforms and for them there are no fixes. This is
the reason why we don't do the 1:1 mappings.
> addresses in higher region.
The thing is, reportedly some Apple UEFI implementations cannot stomach
1:1 SetVirtualAddressMap mappings. Also, the high addresses mappings is
the only thing that vendors test on windoze so in that field we want
to do what windoze does as this is the only thing that gets reliable
testing.
But I get the feeling we're feeling up stuff in the dark as firmware is
closed crap which we cannot look at.
HTH.
--
Regards/Gruss,
Boris.
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next prev parent reply other threads:[~2013-09-12 14:25 UTC|newest]
Thread overview: 42+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-09-10 21:44 [PATCH 00/16] [RFC PATCH] Signed kexec support Vivek Goyal
2013-09-10 21:44 ` [PATCH 01/16] mm: vm_brk(), align the length to page boundary Vivek Goyal
2013-09-10 21:44 ` [PATCH 02/16] integrity: Add a function to determine digital signature length Vivek Goyal
2013-09-10 21:44 ` [PATCH 03/16] ima: Allow adding more memory locking metadata after digital signature v2 Vivek Goyal
2013-09-10 21:44 ` [PATCH 04/16] integrity: Allow digital signature verification with a given keyring ptr Vivek Goyal
2013-09-11 17:34 ` Mimi Zohar
2013-09-10 21:44 ` [PATCH 05/16] integrity: Export a function to retrieve hash algo used in digital signature Vivek Goyal
2013-09-10 21:44 ` [PATCH 06/16] ima: export new IMA functions for signature verification Vivek Goyal
2013-09-10 21:44 ` [PATCH 07/16] mm: Define a task flag MMF_VM_LOCKED for memlocked tasks and don't allow munlock Vivek Goyal
2013-09-10 21:44 ` [PATCH 08/16] binfmt_elf: Elf executable signature verification Vivek Goyal
2013-09-10 21:44 ` [PATCH 09/16] ima: define functions to appraise memory buffer contents Vivek Goyal
2013-09-10 21:44 ` [PATCH 10/16] keyctl: Introduce a new operation KEYCTL_VERIFY_SIGNATURE Vivek Goyal
2013-09-10 21:44 ` [PATCH 11/16] ptrace: Do not allow ptrace() from unsigned process to signed one Vivek Goyal
2013-09-10 21:44 ` [PATCH 12/16] binfmt_elf: Do not mark process signed if binary has elf interpreter Vivek Goyal
2013-09-10 21:44 ` [PATCH 13/16] kexec: Allow only signed processes to call sys_kexec() in secureboot mode Vivek Goyal
2013-09-10 21:44 ` [PATCH 14/16] kexec: Export sysfs attributes for secureboot and secure modules to user space Vivek Goyal
2013-09-10 22:40 ` Greg KH
2013-09-11 13:44 ` Vivek Goyal
2013-09-10 22:57 ` Josh Boyer
2013-09-11 13:51 ` Vivek Goyal
2013-09-10 21:44 ` [PATCH 15/16] bootparam: Pass acpi_rsdp pointer in bootparam Vivek Goyal
2013-09-10 22:52 ` H. Peter Anvin
2013-09-11 11:44 ` Borislav Petkov
2013-09-11 13:45 ` Vivek Goyal
2013-09-11 14:32 ` Borislav Petkov
2013-09-12 7:34 ` Dave Young
2013-09-12 12:53 ` Borislav Petkov
2013-09-12 13:19 ` Vivek Goyal
2013-09-12 14:25 ` Borislav Petkov [this message]
2013-09-12 14:34 ` Matthew Garrett
2013-09-12 14:42 ` Borislav Petkov
2013-09-13 7:12 ` Dave Young
2013-09-13 11:26 ` Borislav Petkov
2013-09-10 21:44 ` [PATCH 16/16] mount: Add a flag to not follow symlink at the end of mount point Vivek Goyal
2013-09-12 3:40 ` [PATCH 00/16] [RFC PATCH] Signed kexec support Greg KH
2013-09-12 11:43 ` Vivek Goyal
2013-09-12 16:17 ` Greg KH
2013-09-12 18:24 ` Mimi Zohar
2013-09-16 14:28 ` Vivek Goyal
2013-09-18 14:51 ` Andrea Adami
2013-09-23 17:15 ` Vivek Goyal
2013-09-16 14:24 ` Vivek Goyal
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