From: Breno Leitao <leitao@debian.org>
To: Ard Biesheuvel <ardb+git@google.com>
Cc: linux-efi@vger.kernel.org, linux-kernel@vger.kernel.org,
x86@kernel.org, Ard Biesheuvel <ardb@kernel.org>,
Dave Young <dyoung@redhat.com>,
Gregory Price <gourry@gourry.net>,
Usama Arif <usamaarif642@gmail.com>,
Jiri Slaby <jirislaby@kernel.org>
Subject: Re: [PATCH v2 3/5] x86/efi: Defer the call to efi_memattr_init()
Date: Wed, 1 Apr 2026 07:57:26 -0700 [thread overview]
Message-ID: <ac0yTFq1UaWD-WmQ@gmail.com> (raw)
In-Reply-To: <20260401122351.2058145-10-ardb+git@google.com>
On Wed, Apr 01, 2026 at 02:23:55PM +0200, Ard Biesheuvel wrote:
> From: Ard Biesheuvel <ardb@kernel.org>
>
> efi_memattr_init() should call efi_mem_reserve() rather than
> memblock_reserve() to preserve the memory contents of the region when
> the EFI memory attributes table is loaded by the firmware.
>
> However, efi_mem_reserve() can only be called later during the boot on
> x86, due to the fact that it may need to memblock_alloc() memory for the
> EFI memory map.
>
> So move the call to efi_memattr_init() to a later stage when building
> for x86_64.
>
> Signed-off-by: Ard Biesheuvel <ardb@kernel.org>
Reviewed-by: Breno Leitao <leitao@debian.org>
next prev parent reply other threads:[~2026-04-01 14:57 UTC|newest]
Thread overview: 14+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-04-01 12:23 [PATCH v2 0/5] x86/efi: Re-enable memory attributes table for kexec Ard Biesheuvel
2026-04-01 12:23 ` [PATCH v2 1/5] efi/memattr: Fix thinko in table size sanity check Ard Biesheuvel
2026-04-01 12:45 ` Breno Leitao
2026-04-01 14:31 ` Ard Biesheuvel
2026-04-01 14:35 ` Breno Leitao
2026-04-01 12:23 ` [PATCH v2 2/5] x86/efi: Gather initial memory reservation and table handling logic Ard Biesheuvel
2026-04-01 14:49 ` Breno Leitao
2026-04-01 14:59 ` Ard Biesheuvel
2026-04-01 12:23 ` [PATCH v2 3/5] x86/efi: Defer the call to efi_memattr_init() Ard Biesheuvel
2026-04-01 14:57 ` Breno Leitao [this message]
2026-04-01 12:23 ` [PATCH v2 4/5] efi: Use efi_mem_reserve() to reserve the memory attribute table Ard Biesheuvel
2026-04-01 17:39 ` Breno Leitao
2026-04-01 17:47 ` Ard Biesheuvel
2026-04-01 12:23 ` [PATCH v2 5/5] x86/efi: Drop kexec quirk for the EFI memory attributes table Ard Biesheuvel
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