All of lore.kernel.org
 help / color / mirror / Atom feed
From: Palmer Dabbelt <palmer@dabbelt.com>
To: alex@ghiti.fr
Cc: Paul Walmsley <paul.walmsley@sifive.com>,
	Palmer Dabbelt <palmer@dabbelt.com>,
	aou@eecs.berkeley.edu, linux-riscv@lists.infradead.org,
	linux-kernel@vger.kernel.org, kernel-team@android.com,
	Palmer Dabbelt <palmerdabbelt@google.com>
Subject: [PATCH] RISC-V: Make CONFIG_RELOCATABLE user selectable
Date: Tue, 26 Oct 2021 14:28:47 -0700	[thread overview]
Message-ID: <20211026212847.43108-1-palmer@dabbelt.com> (raw)

From: Palmer Dabbelt <palmerdabbelt@google.com>

This should really be up to the user, as it trades off portability for
performance.

Signed-off-by: Palmer Dabbelt <palmerdabbelt@google.com>
---
 arch/riscv/Kconfig | 24 ++++++++++++------------
 1 file changed, 12 insertions(+), 12 deletions(-)

diff --git a/arch/riscv/Kconfig b/arch/riscv/Kconfig
index 5dea03549493..f8a36034d54b 100644
--- a/arch/riscv/Kconfig
+++ b/arch/riscv/Kconfig
@@ -212,18 +212,6 @@ config PGTABLE_LEVELS
 config LOCKDEP_SUPPORT
 	def_bool y
 
-config RELOCATABLE
-	bool
-	depends on MMU && 64BIT && !XIP_KERNEL
-	help
-          This builds a kernel as a Position Independent Executable (PIE),
-          which retains all relocation metadata required to relocate the
-          kernel binary at runtime to a different virtual address than the
-          address it was linked at.
-          Since RISCV uses the RELA relocation format, this requires a
-          relocation pass at runtime even if the kernel is loaded at the
-          same address it was linked at.
-
 source "arch/riscv/Kconfig.socs"
 source "arch/riscv/Kconfig.erratas"
 
@@ -433,6 +421,18 @@ config CRASH_DUMP
 
 	  For more details see Documentation/admin-guide/kdump/kdump.rst
 
+config RELOCATABLE
+	bool "Build a relocatable kernel"
+	depends on MMU && 64BIT && !XIP_KERNEL
+	help
+          This builds a kernel as a Position Independent Executable (PIE),
+          which retains all relocation metadata required to relocate the
+          kernel binary at runtime to a different virtual address than the
+          address it was linked at.
+          Since RISCV uses the RELA relocation format, this requires a
+          relocation pass at runtime even if the kernel is loaded at the
+          same address it was linked at.
+
 endmenu
 
 menu "Boot options"
-- 
2.33.0.1079.g6e70778dc9-goog


WARNING: multiple messages have this Message-ID (diff)
From: Palmer Dabbelt <palmer@dabbelt.com>
To: alex@ghiti.fr
Cc: Paul Walmsley <paul.walmsley@sifive.com>,
	Palmer Dabbelt <palmer@dabbelt.com>,
	 aou@eecs.berkeley.edu, linux-riscv@lists.infradead.org,
	linux-kernel@vger.kernel.org,  kernel-team@android.com,
	Palmer Dabbelt <palmerdabbelt@google.com>
Subject: [PATCH] RISC-V: Make CONFIG_RELOCATABLE user selectable
Date: Tue, 26 Oct 2021 14:28:47 -0700	[thread overview]
Message-ID: <20211026212847.43108-1-palmer@dabbelt.com> (raw)

From: Palmer Dabbelt <palmerdabbelt@google.com>

This should really be up to the user, as it trades off portability for
performance.

Signed-off-by: Palmer Dabbelt <palmerdabbelt@google.com>
---
 arch/riscv/Kconfig | 24 ++++++++++++------------
 1 file changed, 12 insertions(+), 12 deletions(-)

diff --git a/arch/riscv/Kconfig b/arch/riscv/Kconfig
index 5dea03549493..f8a36034d54b 100644
--- a/arch/riscv/Kconfig
+++ b/arch/riscv/Kconfig
@@ -212,18 +212,6 @@ config PGTABLE_LEVELS
 config LOCKDEP_SUPPORT
 	def_bool y
 
-config RELOCATABLE
-	bool
-	depends on MMU && 64BIT && !XIP_KERNEL
-	help
-          This builds a kernel as a Position Independent Executable (PIE),
-          which retains all relocation metadata required to relocate the
-          kernel binary at runtime to a different virtual address than the
-          address it was linked at.
-          Since RISCV uses the RELA relocation format, this requires a
-          relocation pass at runtime even if the kernel is loaded at the
-          same address it was linked at.
-
 source "arch/riscv/Kconfig.socs"
 source "arch/riscv/Kconfig.erratas"
 
@@ -433,6 +421,18 @@ config CRASH_DUMP
 
 	  For more details see Documentation/admin-guide/kdump/kdump.rst
 
+config RELOCATABLE
+	bool "Build a relocatable kernel"
+	depends on MMU && 64BIT && !XIP_KERNEL
+	help
+          This builds a kernel as a Position Independent Executable (PIE),
+          which retains all relocation metadata required to relocate the
+          kernel binary at runtime to a different virtual address than the
+          address it was linked at.
+          Since RISCV uses the RELA relocation format, this requires a
+          relocation pass at runtime even if the kernel is loaded at the
+          same address it was linked at.
+
 endmenu
 
 menu "Boot options"
-- 
2.33.0.1079.g6e70778dc9-goog


_______________________________________________
linux-riscv mailing list
linux-riscv@lists.infradead.org
http://lists.infradead.org/mailman/listinfo/linux-riscv

             reply	other threads:[~2021-10-26 21:29 UTC|newest]

Thread overview: 12+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-10-26 21:28 Palmer Dabbelt [this message]
2021-10-26 21:28 ` [PATCH] RISC-V: Make CONFIG_RELOCATABLE user selectable Palmer Dabbelt
2021-10-27  5:07 ` Alexandre ghiti
2021-10-27  5:07   ` Alexandre ghiti
2021-10-27  8:00 ` Andreas Schwab
2021-10-27  8:00   ` Andreas Schwab
2021-10-27  8:58   ` Alexandre Ghiti
2021-10-27  8:58     ` Alexandre Ghiti
2021-10-27  9:45     ` Andreas Schwab
2021-10-27  9:45       ` Andreas Schwab
2021-10-27 23:09       ` Palmer Dabbelt
2021-10-27 23:09         ` Palmer Dabbelt

Reply instructions:

You may reply publicly to this message via plain-text email
using any one of the following methods:

* Save the following mbox file, import it into your mail client,
  and reply-to-all from there: mbox

  Avoid top-posting and favor interleaved quoting:
  https://en.wikipedia.org/wiki/Posting_style#Interleaved_style

* Reply using the --to, --cc, and --in-reply-to
  switches of git-send-email(1):

  git send-email \
    --in-reply-to=20211026212847.43108-1-palmer@dabbelt.com \
    --to=palmer@dabbelt.com \
    --cc=alex@ghiti.fr \
    --cc=aou@eecs.berkeley.edu \
    --cc=kernel-team@android.com \
    --cc=linux-kernel@vger.kernel.org \
    --cc=linux-riscv@lists.infradead.org \
    --cc=palmerdabbelt@google.com \
    --cc=paul.walmsley@sifive.com \
    /path/to/YOUR_REPLY

  https://kernel.org/pub/software/scm/git/docs/git-send-email.html

* If your mail client supports setting the In-Reply-To header
  via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line before the message body. 
This is an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.