From: 'Joerg Roedel' <joro@8bytes.org>
To: David Laight <David.Laight@aculab.com>
Cc: "x86@kernel.org" <x86@kernel.org>,
Thomas Gleixner <tglx@linutronix.de>,
Ingo Molnar <mingo@redhat.com>, Borislav Petkov <bp@alien8.de>,
"hpa@zytor.com" <hpa@zytor.com>, Joerg Roedel <jroedel@suse.de>,
Kees Cook <keescook@chromium.org>,
Andy Lutomirski <luto@kernel.org>,
Uros Bizjak <ubizjak@gmail.com>,
Arvind Sankar <nivedita@alum.mit.edu>,
Ard Biesheuvel <ardb@kernel.org>,
"linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
Fabio Aiuto <fabioaiuto83@gmail.com>,
"stable@vger.kernel.org" <stable@vger.kernel.org>
Subject: Re: [PATCH] x86/efi: Restore Firmware IDT in before ExitBootServices()
Date: Fri, 20 Aug 2021 12:19:50 +0200 [thread overview]
Message-ID: <YR+Bxgq4aIo1DI8j@8bytes.org> (raw)
In-Reply-To: <f68a175362984e4abbb0a1da2004c936@AcuMS.aculab.com>
On Fri, Aug 20, 2021 at 09:02:46AM +0000, David Laight wrote:
> So allocate and initialise the Linux IDT - so entries can be added.
> But don't execute 'lidt' until later on.
The IDT is needed in this path to handle #VC exceptions caused by CPUID
instructions. So loading the IDT later is not an option.
Regards,
Joerg
next prev parent reply other threads:[~2021-08-20 10:20 UTC|newest]
Thread overview: 13+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-08-20 7:34 [PATCH] x86/efi: Restore Firmware IDT in before ExitBootServices() Joerg Roedel
2021-08-20 7:41 ` Ard Biesheuvel
2021-08-20 8:01 ` Joerg Roedel
2021-08-20 8:43 ` David Laight
2021-08-20 8:52 ` 'Joerg Roedel'
2021-08-20 9:02 ` David Laight
2021-08-20 10:19 ` 'Joerg Roedel' [this message]
2021-08-20 11:31 ` Ard Biesheuvel
2021-08-20 11:51 ` Joerg Roedel
2021-08-20 15:46 ` David Laight
2021-08-20 16:04 ` Joerg Roedel
2021-08-20 9:26 ` Borislav Petkov
2021-08-20 11:24 ` Borislav Petkov
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