From: Thomas Gleixner <tglx@linutronix.de>
To: LKML <linux-kernel@vger.kernel.org>
Cc: x86@kernel.org, Steven Rostedt <rostedt@goodmis.org>,
Brian Gerst <brgerst@gmail.com>, Juergen Gross <jgross@suse.com>,
Paolo Bonzini <pbonzini@redhat.com>,
Arnd Bergmann <arnd@arndb.de>, Andy Lutomirski <luto@kernel.org>
Subject: [patch 02/15] x86/entry/64: Add ability to switch to IRQ stacks in idtentry
Date: Tue, 25 Feb 2020 23:47:21 +0100 [thread overview]
Message-ID: <20200225231609.110531538@linutronix.de> (raw)
In-Reply-To: 20200225224719.950376311@linutronix.de
Expand the idtentry macro so it supports switching to interrupt stacks on
64bit. Preparatory change to let regular device interrupts use idtentry
instead of having their own mechanism.
Suggested-by: Andy Lutomirski <luto@kernel.org>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
---
arch/x86/entry/entry_64.S | 18 ++++++++++++++----
1 file changed, 14 insertions(+), 4 deletions(-)
--- a/arch/x86/entry/entry_64.S
+++ b/arch/x86/entry/entry_64.S
@@ -495,8 +495,9 @@ SYM_CODE_END(spurious_entries_start)
* idtentry_body - Macro to emit code calling the C function
* @cfunc: C function to be called
* @has_error_code: Hardware pushed error code on stack
+ * @irq_stack: Execute @cfunc on the IRQ stack (device interrupts)
*/
-.macro idtentry_body cfunc has_error_code:req
+.macro idtentry_body cfunc has_error_code:req irq_stack:req
call error_entry
UNWIND_HINT_REGS
@@ -508,8 +509,16 @@ SYM_CODE_END(spurious_entries_start)
movq $-1, ORIG_RAX(%rsp) /* no syscall to restart */
.endif
+ .if \irq_stack
+ ENTER_IRQ_STACK old_rsp=%rdi
+ .endif
+
call \cfunc
+ .if \irq_stack
+ LEAVE_IRQ_STACK /* interrupts are disabled */
+ .endif
+
jmp error_exit
.endm
@@ -519,11 +528,12 @@ SYM_CODE_END(spurious_entries_start)
* @asmsym: ASM symbol for the entry point
* @cfunc: C function to be called
* @has_error_code: Hardware pushed error code on stack
+ * @irq_stack: Execute @cfunc on the IRQ stack (device interrupts)
*
* The macro emits code to set up the kernel context for straight forward
* and simple IDT entries. No IST stack, no paranoid entry checks.
*/
-.macro idtentry vector asmsym cfunc has_error_code:req
+.macro idtentry vector asmsym cfunc has_error_code:req irq_stack=0
SYM_CODE_START(\asmsym)
UNWIND_HINT_IRET_REGS offset=\has_error_code*8
ASM_CLAC
@@ -546,7 +556,7 @@ SYM_CODE_START(\asmsym)
.Lfrom_usermode_no_gap_\@:
.endif
- idtentry_body \cfunc \has_error_code
+ idtentry_body \cfunc \has_error_code \irq_stack
_ASM_NOKPROBE(\asmsym)
SYM_CODE_END(\asmsym)
@@ -621,7 +631,7 @@ SYM_CODE_START(\asmsym)
/* Switch to the regular task stack and use the noist entry point */
.Lfrom_usermode_switch_stack_\@:
- idtentry_body noist_\cfunc, has_error_code=0
+ idtentry_body noist_\cfunc, has_error_code=0 irq_stack=0
_ASM_NOKPROBE(\asmsym)
SYM_CODE_END(\asmsym)
next prev parent reply other threads:[~2020-02-25 23:27 UTC|newest]
Thread overview: 30+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-02-25 22:47 [patch 00/15] x86/entry: Consolidation - Part V Thomas Gleixner
2020-02-25 22:47 ` [patch 01/15] x86/irq: Convey vector as argument and not in ptregs Thomas Gleixner
2020-02-26 5:13 ` Andy Lutomirski
2020-02-26 5:45 ` Brian Gerst
2020-02-26 20:13 ` Thomas Gleixner
2020-02-26 21:35 ` Andy Lutomirski
2020-02-26 23:50 ` Thomas Gleixner
2020-02-26 21:54 ` Brian Gerst
2020-02-26 23:43 ` Thomas Gleixner
2020-02-27 0:04 ` Brian Gerst
2020-02-25 22:47 ` Thomas Gleixner [this message]
2020-02-25 22:47 ` [patch 03/15] x86/entry: Add IRQENTRY_IRQ macro Thomas Gleixner
2020-02-26 15:05 ` Miroslav Benes
2020-02-25 22:47 ` [patch 04/15] x86/entry: Use idtentry for interrupts Thomas Gleixner
2020-02-25 22:47 ` [patch 05/15] x86/entry: Provide IDTEnTRY_SYSVEC Thomas Gleixner
2020-02-26 6:10 ` Andy Lutomirski
2020-02-26 20:15 ` Thomas Gleixner
2020-02-25 22:47 ` [patch 06/15] x86/entry: Convert APIC interrupts to IDTENTRY_SYSVEC Thomas Gleixner
2020-02-25 22:47 ` [patch 07/15] x86/entry: Convert SMP system vectors " Thomas Gleixner
2020-02-25 22:47 ` [patch 08/15] x86/entry: Convert various system vectors Thomas Gleixner
2020-02-25 22:47 ` [patch 09/15] x86/entry: Convert KVM vectors to IDTENTRY_SYSVEC Thomas Gleixner
2020-02-26 10:54 ` Paolo Bonzini
2020-02-25 22:47 ` [patch 10/15] x86/entry: Convert various hypervisor " Thomas Gleixner
2020-02-25 22:47 ` [patch 11/15] x86/entry: Convert XEN hypercall vector " Thomas Gleixner
2020-02-25 22:47 ` [patch 12/15] x86/entry: Remove the apic/BUILD interrupt leftovers Thomas Gleixner
2020-02-25 22:47 ` [patch 13/15] x86/entry/32: Remove redundant irq disable code Thomas Gleixner
2020-02-25 22:47 ` [patch 14/15] x86/entry: Provide return_from exception() Thomas Gleixner
2020-02-25 22:47 ` [patch 15/15] x86/entry: Use return_from_exception() Thomas Gleixner
2020-02-26 9:53 ` [patch 00/15] x86/entry: Consolidation - Part V Peter Zijlstra
2020-02-26 10:02 ` Peter Zijlstra
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=20200225231609.110531538@linutronix.de \
--to=tglx@linutronix.de \
--cc=arnd@arndb.de \
--cc=brgerst@gmail.com \
--cc=jgross@suse.com \
--cc=linux-kernel@vger.kernel.org \
--cc=luto@kernel.org \
--cc=pbonzini@redhat.com \
--cc=rostedt@goodmis.org \
--cc=x86@kernel.org \
/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.