From: Ingo Molnar <mingo@kernel.org>
To: Andy Lutomirski <luto@kernel.org>
Cc: "H. Peter Anvin" <hpa@zytor.com>,
x86@kernel.org, Mario Limonciello <mario_limonciello@dell.com>,
Matthew Garrett <mjg59@srcf.ucam.org>,
Borislav Petkov <bp@alien8.de>, Matt Fleming <mfleming@suse.de>,
linux-kernel@vger.kernel.org
Subject: Re: [PATCH v2 0/5] Allow the trampoline to use EFI boot services RAM
Date: Wed, 10 Aug 2016 14:28:26 +0200 [thread overview]
Message-ID: <20160810122826.GA3204@gmail.com> (raw)
In-Reply-To: <cover.1470821230.git.luto@kernel.org>
* Andy Lutomirski <luto@kernel.org> wrote:
> As currently configured, my laptop cannot boot any existing kernel
> because the real mode trampoline can't be reserved. The ranges in
> which it could live are rejected by the kernel: one is EFI boot
> services data and the other is above the EBDA.
Ok, so I like this series - if Matt acks it I can apply it.
How urgent is it? The 'laptop does not boot' aspect worries me - how frequently
are systems hit by this?
The approach you chose looks sufficiently robust and straightforward to me, so it
ought to work fine even for x86/urgent - but we can phase it into efi/core as well
if Matt prefers that.
Thanks,
Ingo
next prev parent reply other threads:[~2016-08-10 19:13 UTC|newest]
Thread overview: 18+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-08-10 9:29 [PATCH v2 0/5] Allow the trampoline to use EFI boot services RAM Andy Lutomirski
2016-08-10 9:29 ` [PATCH v2 1/5] x86/boot: Run reserve_bios_regions() after we initialize the memory map Andy Lutomirski
2016-08-11 11:57 ` [tip:x86/urgent] " tip-bot for Andy Lutomirski
2016-08-10 9:29 ` [PATCH v2 2/5] x86/boot: Synchronize trampoline_cr4_features and mmu_cr4_features directly Andy Lutomirski
2016-08-11 11:58 ` [tip:x86/urgent] " tip-bot for Andy Lutomirski
2016-08-10 9:29 ` [PATCH v2 3/5] x86/boot: Defer setup_real_mode() to early_initcall time Andy Lutomirski
2016-08-11 11:58 ` [tip:x86/urgent] " tip-bot for Andy Lutomirski
2016-08-10 9:29 ` [PATCH v2 4/5] x86/boot: Rework reserve_real_mode() to allow multiple tries Andy Lutomirski
2016-08-11 11:59 ` [tip:x86/urgent] " tip-bot for Andy Lutomirski
2016-08-10 9:29 ` [PATCH v2 5/5] x86/efi: Allocate a trampoline if needed in efi_free_boot_services() Andy Lutomirski
2016-08-11 16:19 ` [tip:x86/urgent] " tip-bot for Andy Lutomirski
2016-08-10 12:28 ` Ingo Molnar [this message]
2016-08-10 13:21 ` [PATCH v2 0/5] Allow the trampoline to use EFI boot services RAM Andy Lutomirski
2016-08-10 16:08 ` Mario_Limonciello
2016-08-10 12:30 ` Ingo Molnar
2016-08-10 13:18 ` Andy Lutomirski
2016-08-11 8:52 ` Ingo Molnar
2016-08-11 10:36 ` Matt Fleming
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