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From: Ali Raza <aliraza@bu.edu>
To: linux-kernel@vger.kernel.org
Cc: corbet@lwn.net, masahiroy@kernel.org, michal.lkml@markovi.net,
	ndesaulniers@google.com, tglx@linutronix.de, mingo@redhat.com,
	bp@alien8.de, dave.hansen@linux.intel.com, hpa@zytor.com,
	luto@kernel.org, ebiederm@xmission.com, keescook@chromium.org,
	peterz@infradead.org, viro@zeniv.linux.org.uk, arnd@arndb.de,
	juri.lelli@redhat.com, vincent.guittot@linaro.org,
	dietmar.eggemann@arm.com, rostedt@goodmis.org,
	bsegall@google.com, mgorman@suse.de, bristot@redhat.com,
	vschneid@redhat.com, pbonzini@redhat.com, jpoimboe@kernel.org,
	linux-doc@vger.kernel.org, linux-kbuild@vger.kernel.org,
	linux-mm@kvack.org, linux-fsdevel@vger.kernel.org,
	linux-arch@vger.kernel.org, x86@kernel.org, rjones@redhat.com,
	munsoner@bu.edu, tommyu@bu.edu, drepper@redhat.com,
	lwoodman@redhat.com, mboydmcse@gmail.com, okrieg@bu.edu,
	rmancuso@bu.edu, Ali Raza <aliraza@bu.edu>
Subject: [RFC UKL 02/10] x86/boot: Load the PT_TLS segment for Unikernel configs
Date: Mon,  3 Oct 2022 18:21:25 -0400	[thread overview]
Message-ID: <20221003222133.20948-3-aliraza@bu.edu> (raw)
In-Reply-To: <20221003222133.20948-1-aliraza@bu.edu>

The kernel normally skips loading this segment as it is not inlcuded in
standard builds. However, when linked with an application in the Unikernel
configuration the segment will be present. Load PT_TLS when configured as a
unikernel.

Cc: Jonathan Corbet <corbet@lwn.net>
Cc: Masahiro Yamada <masahiroy@kernel.org>
Cc: Michal Marek <michal.lkml@markovi.net>
Cc: Nick Desaulniers <ndesaulniers@google.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Borislav Petkov <bp@alien8.de>
Cc: Dave Hansen <dave.hansen@linux.intel.com>
Cc: "H. Peter Anvin" <hpa@zytor.com>
Cc: Andy Lutomirski <luto@kernel.org>
Cc: Eric Biederman <ebiederm@xmission.com>
Cc: Kees Cook <keescook@chromium.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Alexander Viro <viro@zeniv.linux.org.uk>
Cc: Arnd Bergmann <arnd@arndb.de>
Cc: Juri Lelli <juri.lelli@redhat.com>
Cc: Vincent Guittot <vincent.guittot@linaro.org>
Cc: Dietmar Eggemann <dietmar.eggemann@arm.com>
Cc: Steven Rostedt <rostedt@goodmis.org>
Cc: Ben Segall <bsegall@google.com>
Cc: Mel Gorman <mgorman@suse.de>
Cc: Daniel Bristot de Oliveira <bristot@redhat.com>
Cc: Valentin Schneider <vschneid@redhat.com>
Cc: Paolo Bonzini <pbonzini@redhat.com>
Cc: Josh Poimboeuf <jpoimboe@kernel.org>

Signed-off-by: Ali Raza <aliraza@bu.edu>
---
 arch/x86/boot/compressed/misc.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/arch/x86/boot/compressed/misc.c b/arch/x86/boot/compressed/misc.c
index cf690d8712f4..0d07b5661c9c 100644
--- a/arch/x86/boot/compressed/misc.c
+++ b/arch/x86/boot/compressed/misc.c
@@ -310,6 +310,9 @@ static void parse_elf(void *output)
 		phdr = &phdrs[i];
 
 		switch (phdr->p_type) {
+#ifdef CONFIG_UNIKERNEL_LINUX
+		case PT_TLS:
+#endif
 		case PT_LOAD:
 #ifdef CONFIG_X86_64
 			if ((phdr->p_align % 0x200000) != 0)
-- 
2.21.3


  parent reply	other threads:[~2022-10-03 22:22 UTC|newest]

Thread overview: 26+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2022-10-03 22:21 [RFC UKL 00/10] Unikernel Linux (UKL) Ali Raza
2022-10-03 22:21 ` [RFC UKL 01/10] kbuild: Add sections and symbols to linker script for UKL support Ali Raza
2022-10-03 22:21 ` Ali Raza [this message]
2022-10-04 17:30   ` [RFC UKL 02/10] x86/boot: Load the PT_TLS segment for Unikernel configs Andy Lutomirski
2022-10-06 21:00     ` Ali Raza
2022-10-03 22:21 ` [RFC UKL 03/10] sched: Add task_struct tracking of kernel or application execution Ali Raza
2022-10-03 22:21 ` [RFC UKL 04/10] x86/entry: Create alternate entry path for system calls Ali Raza
2022-10-04 17:43   ` Andy Lutomirski
2022-10-06 21:12     ` Ali Raza
2022-10-03 22:21 ` [RFC UKL 05/10] x86/uaccess: Make access_ok UKL aware Ali Raza
2022-10-04 17:36   ` Andy Lutomirski
2022-10-06 21:16     ` Ali Raza
2022-10-03 22:21 ` [RFC UKL 06/10] x86/fault: Skip checking kernel mode access to user address space for UKL Ali Raza
2022-10-03 22:21 ` [RFC UKL 07/10] x86/signal: Adjust signal handler register values and return frame Ali Raza
2022-10-04 17:34   ` Andy Lutomirski
2022-10-06 21:20     ` Ali Raza
2022-10-03 22:21 ` [RFC UKL 08/10] exec: Make exec path for starting UKL application Ali Raza
2022-10-03 22:21 ` [RFC UKL 09/10] exec: Give userspace a method for starting UKL process Ali Raza
2022-10-04 17:35   ` Andy Lutomirski
2022-10-06 21:25     ` Ali Raza
2022-10-03 22:21 ` [RFC UKL 10/10] Kconfig: Add config option for enabling and sample for testing UKL Ali Raza
2022-10-04  2:11   ` Bagas Sanjaya
2022-10-06 21:28     ` Ali Raza
2022-10-07 10:21       ` Masahiro Yamada
2022-10-13 17:08         ` Ali Raza
2022-10-06 21:27 ` [RFC UKL 00/10] Unikernel Linux (UKL) H. Peter Anvin

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