[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]
Re: [PATCH][4.17] EFI: don't convert memory marked for runtime use to ordinary RAM
- To: Andrew Cooper <Andrew.Cooper3@xxxxxxxxxx>
- From: Jan Beulich <jbeulich@xxxxxxxx>
- Date: Fri, 30 Sep 2022 15:07:48 +0200
- Arc-authentication-results: i=1; mx.microsoft.com 1; spf=pass smtp.mailfrom=suse.com; dmarc=pass action=none header.from=suse.com; dkim=pass header.d=suse.com; arc=none
- Arc-message-signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=microsoft.com; s=arcselector9901; h=From:Date:Subject:Message-ID:Content-Type:MIME-Version:X-MS-Exchange-AntiSpam-MessageData-ChunkCount:X-MS-Exchange-AntiSpam-MessageData-0:X-MS-Exchange-AntiSpam-MessageData-1; bh=bzLpBGp7hs+UwkFZ3efQGLxJLr0RpDbq77EgNcKa3jQ=; b=VVyZjotN3kAZ+P6rZpdIFlSj0SNaETjpfUfsvjLOyScduFdO0kzNEiGiicz6zKSOahED2I3hTeF2PH+BeoYzGZFyXvQnKMiB4z94xWbi6o2INut2CsBS/zlVyJvSb/jFRrmhMKt7kFcU81/2eTYWLKpac9qN6flGV4uq9ddfq/vfcX2J55nwQkLFTU2bGMAZrm/5frgzmILnBgINlOEiJFJnUBla1gJ62EwdfcjC9Ha+XOtE/IxKigL5T2ixfHWnChT5ggsBH6c3fcp3SSWfEjQutwhefz7YRr399bxwfK8WmPm6cf7PYC2GHHHQrsrEF9XMHuaxy9zpJNyu8JbkWg==
- Arc-seal: i=1; a=rsa-sha256; s=arcselector9901; d=microsoft.com; cv=none; b=CgQ8V09LVWLjXwftwhDJ0pXFoHLvGNRqSd9AZsxIWD1BLNGrlVlNoogRkMYvFHuC9cZYi+a/9CVa2Mra5+VwzJcOmlPARYtIVoJOqheuZBYC92DAFINW3Io7fnT27TPAx9P8vVkxaUJydaBj31sVi0wh9d2U3X0haY1nxtWiZImxbc9RuSPMCjnxENC02WHCsW2KV3DizXrk/bLwGH57zkOLL+SbZsNjkPjsII0wJKezssfYkqg2kfYZqnfWW28yJWDci0kMT/ELHb3YIwq7+8Yl8XlDHOXzf3tgqy7NPlPMKEB9o9VuyDUi7Li0q8uXQIyQzIBMUDOEXGc2EaE/zg==
- Authentication-results: dkim=none (message not signed) header.d=none;dmarc=none action=none header.from=suse.com;
- Cc: Wei Liu <wl@xxxxxxx>, Roger Pau Monne <roger.pau@xxxxxxxxxx>, Julien Grall <julien@xxxxxxx>, Stefano Stabellini <sstabellini@xxxxxxxxxx>, Volodymyr Babchuk <volodymyr_babchuk@xxxxxxxx>, Bertrand Marquis <bertrand.marquis@xxxxxxx>, Henry Wang <Henry.Wang@xxxxxxx>, "xen-devel@xxxxxxxxxxxxxxxxxxxx" <xen-devel@xxxxxxxxxxxxxxxxxxxx>
- Delivery-date: Fri, 30 Sep 2022 13:08:01 +0000
- List-id: Xen developer discussion <xen-devel.lists.xenproject.org>
On 30.09.2022 14:53, Andrew Cooper wrote:
> On 30/09/2022 08:50, Jan Beulich wrote:
>> efi_init_memory() in both relevant places is treating EFI_MEMORY_RUNTIME
>> higher priority than the type of the range. To avoid accessing memory at
>> runtime which was re-used for other purposes, make
>> efi_arch_process_memory_map() follow suit. While on x86 in theory the
>> same would apply to EfiACPIReclaimMemory, we don't actually "reclaim"
>> E820_ACPI memory there and hence that type's handling can be left alone.
>>
>> Fixes: bf6501a62e80 ("x86-64: EFI boot code")
>> Fixes: facac0af87ef ("x86-64: EFI runtime code")
>> Fixes: 6d70ea10d49f ("Add ARM EFI boot support")
>> Signed-off-by: Jan Beulich <jbeulich@xxxxxxxx>
>
> Isn't this also liable to be the root cause of the crash reported on
> IRC, where a read-only page was being inserted into the heap?
I wouldn't be able to make the connection, I'm afraid. What was asked there
was lacking details, though.
Jan
|
