From: "H. Peter Anvin" <hpa@zytor.com>
To: "Jason A. Donenfeld" <Jason@zx2c4.com>
Cc: Borislav Petkov <bp@alien8.de>,
pbonzini@redhat.com, ebiggers@kernel.org, x86@kernel.org,
linux-kernel@vger.kernel.org, qemu-devel@nongnu.org,
ardb@kernel.org, kraxel@redhat.com, philmd@linaro.org
Subject: Re: [PATCH qemu] x86: don't let decompressed kernel image clobber setup_data
Date: Fri, 30 Dec 2022 17:14:26 -0800 [thread overview]
Message-ID: <7dc37024-5bdd-1206-020b-5072629b80dd@zytor.com> (raw)
In-Reply-To: <46466e54-25c3-3194-8546-a57cd4a80d9d@zytor.com>
On 12/30/22 17:06, H. Peter Anvin wrote
>
> TThe 62 MB limit mentioned in boot.rst is unrelated, and only applies to
> very, very old kernels that used INT 15h, AH=88h to probe memory.
>
I am 88% sure this was fixed long before setup_data was created, as it
was created originally to carry e820 info for more than 128(!) memory
segments. However, as we see here, it is never certain that bugs didn't
creep in in the meantime...
-hpa
next prev parent reply other threads:[~2022-12-31 1:15 UTC|newest]
Thread overview: 46+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-12-28 14:38 Jason A. Donenfeld
2022-12-28 16:02 ` Philippe Mathieu-Daudé
2022-12-28 16:30 ` Jason A. Donenfeld
2022-12-28 16:57 ` Jason A. Donenfeld
2022-12-28 23:58 ` H. Peter Anvin
2022-12-29 2:13 ` H. Peter Anvin
2022-12-29 2:31 ` Jason A. Donenfeld
2022-12-29 7:28 ` Philippe Mathieu-Daudé
2022-12-29 7:30 ` H. Peter Anvin
2022-12-29 7:31 ` H. Peter Anvin
2022-12-29 12:47 ` Borislav Petkov
2022-12-30 15:54 ` Jason A. Donenfeld
2022-12-30 17:01 ` Borislav Petkov
2022-12-30 17:07 ` Jason A. Donenfeld
2022-12-30 19:54 ` Borislav Petkov
2022-12-30 21:58 ` H. Peter Anvin
2022-12-30 22:10 ` Jason A. Donenfeld
2022-12-31 1:06 ` H. Peter Anvin
2022-12-31 1:14 ` H. Peter Anvin [this message]
2022-12-31 12:55 ` Jason A. Donenfeld
2022-12-31 13:40 ` Borislav Petkov
2022-12-31 13:44 ` Jason A. Donenfeld
2022-12-31 13:48 ` Borislav Petkov
2022-12-31 13:51 ` Jason A. Donenfeld
2022-12-31 14:24 ` Borislav Petkov
2022-12-31 18:22 ` Jason A. Donenfeld
2022-12-31 19:00 ` Borislav Petkov
2023-01-01 3:21 ` H. Peter Anvin
2023-01-01 3:31 ` H. Peter Anvin
2023-01-02 6:01 ` Borislav Petkov
2023-01-02 6:17 ` Borislav Petkov
2023-01-02 9:32 ` Ard Biesheuvel
2023-01-02 13:36 ` Borislav Petkov
2023-01-02 15:03 ` Ard Biesheuvel
2023-01-02 5:50 ` Borislav Petkov
2023-01-01 4:33 ` H. Peter Anvin
2023-01-01 4:55 ` Mika Penttilä
2023-01-01 5:13 ` H. Peter Anvin
2022-12-30 15:59 ` Jason A. Donenfeld
2022-12-30 16:21 ` Jason A. Donenfeld
2022-12-30 19:13 ` H. Peter Anvin
2022-12-31 9:48 ` Borislav Petkov
2022-12-31 12:54 ` Jason A. Donenfeld
2022-12-31 13:35 ` Borislav Petkov
2022-12-31 13:42 ` Jason A. Donenfeld
2022-12-30 18:30 ` Jason A. Donenfeld
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