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From: "tip-bot2 for Peter Zijlstra" <tip-bot2@linutronix.de>
To: linux-tip-commits@vger.kernel.org
Cc: "Peter Zijlstra (Intel)" <peterz@infradead.org>,
	Juergen Gross <jgross@suse.com>,
	x86@kernel.org, linux-kernel@vger.kernel.org
Subject: [tip: objtool/core] x86/xen: Make set_debugreg() noinstr
Date: Fri, 17 Sep 2021 12:58:06 -0000	[thread overview]
Message-ID: <163188348691.25758.14757043160920496776.tip-bot2@tip-bot2> (raw)
In-Reply-To: <20210624095148.687755639@infradead.org>

The following commit has been merged into the objtool/core branch of tip:

Commit-ID:     7361fac0465ba96ec8f7559459e3c70818ba6c78
Gitweb:        https://git.kernel.org/tip/7361fac0465ba96ec8f7559459e3c70818ba6c78
Author:        Peter Zijlstra <peterz@infradead.org>
AuthorDate:    Thu, 24 Jun 2021 11:41:16 +02:00
Committer:     Peter Zijlstra <peterz@infradead.org>
CommitterDate: Fri, 17 Sep 2021 13:14:39 +02:00

x86/xen: Make set_debugreg() noinstr

vmlinux.o: warning: objtool: pv_ops[2]: xen_set_debugreg
vmlinux.o: warning: objtool: pv_ops[2]: native_set_debugreg
vmlinux.o: warning: objtool: exc_debug()+0x3b: call to pv_ops[2]() leaves .noinstr.text section

Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Reviewed-by: Juergen Gross <jgross@suse.com>
Link: https://lore.kernel.org/r/20210624095148.687755639@infradead.org
---
 arch/x86/include/asm/paravirt.h      |  2 +-
 arch/x86/include/asm/xen/hypercall.h |  2 +-
 arch/x86/kernel/paravirt.c           |  9 ++++++---
 arch/x86/xen/enlighten_pv.c          |  2 +-
 4 files changed, 9 insertions(+), 6 deletions(-)

diff --git a/arch/x86/include/asm/paravirt.h b/arch/x86/include/asm/paravirt.h
index f48465c..34da790 100644
--- a/arch/x86/include/asm/paravirt.h
+++ b/arch/x86/include/asm/paravirt.h
@@ -118,7 +118,7 @@ static __always_inline unsigned long paravirt_get_debugreg(int reg)
 	return PVOP_CALL1(unsigned long, cpu.get_debugreg, reg);
 }
 #define get_debugreg(var, reg) var = paravirt_get_debugreg(reg)
-static inline void set_debugreg(unsigned long val, int reg)
+static __always_inline void set_debugreg(unsigned long val, int reg)
 {
 	PVOP_VCALL2(cpu.set_debugreg, reg, val);
 }
diff --git a/arch/x86/include/asm/xen/hypercall.h b/arch/x86/include/asm/xen/hypercall.h
index af92202..990b8aa 100644
--- a/arch/x86/include/asm/xen/hypercall.h
+++ b/arch/x86/include/asm/xen/hypercall.h
@@ -308,7 +308,7 @@ HYPERVISOR_platform_op(struct xen_platform_op *op)
 	return _hypercall1(int, platform_op, op);
 }
 
-static inline int
+static __always_inline int
 HYPERVISOR_set_debugreg(int reg, unsigned long value)
 {
 	return _hypercall2(int, set_debugreg, reg, value);
diff --git a/arch/x86/kernel/paravirt.c b/arch/x86/kernel/paravirt.c
index 8af526c..cdaf862 100644
--- a/arch/x86/kernel/paravirt.c
+++ b/arch/x86/kernel/paravirt.c
@@ -233,6 +233,11 @@ static noinstr unsigned long pv_native_get_debugreg(int regno)
 {
 	return native_get_debugreg(regno);
 }
+
+static noinstr void pv_native_set_debugreg(int regno, unsigned long val)
+{
+	native_set_debugreg(regno, val);
+}
 #endif
 
 enum paravirt_lazy_mode paravirt_get_lazy_mode(void)
@@ -260,7 +265,7 @@ struct paravirt_patch_template pv_ops = {
 #ifdef CONFIG_PARAVIRT_XXL
 	.cpu.cpuid		= native_cpuid,
 	.cpu.get_debugreg	= pv_native_get_debugreg,
-	.cpu.set_debugreg	= native_set_debugreg,
+	.cpu.set_debugreg	= pv_native_set_debugreg,
 	.cpu.read_cr0		= native_read_cr0,
 	.cpu.write_cr0		= native_write_cr0,
 	.cpu.write_cr4		= native_write_cr4,
@@ -386,8 +391,6 @@ struct paravirt_patch_template pv_ops = {
 };
 
 #ifdef CONFIG_PARAVIRT_XXL
-/* At this point, native_get/set_debugreg has real function entries */
-NOKPROBE_SYMBOL(native_set_debugreg);
 NOKPROBE_SYMBOL(native_load_idt);
 
 void (*paravirt_iret)(void) = native_iret;
diff --git a/arch/x86/xen/enlighten_pv.c b/arch/x86/xen/enlighten_pv.c
index 273e1fa..2b1a8ba 100644
--- a/arch/x86/xen/enlighten_pv.c
+++ b/arch/x86/xen/enlighten_pv.c
@@ -311,7 +311,7 @@ static void __init xen_init_capabilities(void)
 	}
 }
 
-static void xen_set_debugreg(int reg, unsigned long val)
+static noinstr void xen_set_debugreg(int reg, unsigned long val)
 {
 	HYPERVISOR_set_debugreg(reg, val);
 }

  parent reply	other threads:[~2021-09-17 12:58 UTC|newest]

Thread overview: 101+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-06-24  9:40 [PATCH v2 00/24] objtool/x86: noinstr vs PARAVIRT Peter Zijlstra
2021-06-24  9:41 ` [PATCH v2 01/24] x86/xen: Mark cpu_bringup_and_idle() as dead_end_function Peter Zijlstra
2021-06-24 10:49   ` Juergen Gross
2021-06-30 11:47   ` Miroslav Benes
2021-08-20 19:22   ` Josh Poimboeuf
2021-08-20 19:31     ` Josh Poimboeuf
2021-08-23  8:40       ` Juergen Gross
2021-08-30  5:55         ` Juergen Gross
2021-08-30  7:48           ` Peter Zijlstra
2021-08-30  7:56             ` Juergen Gross
2021-09-15 15:49       ` [tip: objtool/core] x86/xen: Move hypercall_page to top of the file tip-bot2 for Josh Poimboeuf
2021-09-15 15:49   ` [tip: objtool/core] x86/xen: Mark cpu_bringup_and_idle() as dead_end_function tip-bot2 for Peter Zijlstra
2021-06-24  9:41 ` [PATCH v2 02/24] objtool: Introduce CFI hash Peter Zijlstra
2021-06-30 12:45   ` Miroslav Benes
2021-07-01  8:35     ` Peter Zijlstra
2021-07-01  8:53       ` Miroslav Benes
2021-08-20 22:27   ` Josh Poimboeuf
2021-08-25 10:13     ` Peter Zijlstra
2021-08-25 12:49       ` Peter Zijlstra
2021-08-25 10:15     ` Peter Zijlstra
2021-09-15 15:49   ` [tip: objtool/core] " tip-bot2 for Peter Zijlstra
2021-06-24  9:41 ` [PATCH v2 03/24] objtool: Handle __sanitize_cov*() tail calls Peter Zijlstra
2021-06-25 11:05   ` Marco Elver
2021-06-28  9:07     ` Peter Zijlstra
2021-06-25 13:38   ` Steven Rostedt
2021-06-26  8:18     ` Peter Zijlstra
2021-06-29  1:07       ` Steven Rostedt
2021-08-20 23:17   ` Josh Poimboeuf
2021-08-25 10:19     ` Peter Zijlstra
2021-09-15 15:49   ` [tip: objtool/core] " tip-bot2 for Peter Zijlstra
2021-06-24  9:41 ` [PATCH v2 04/24] x86/kvm: Always inline sev_*guest() Peter Zijlstra
2021-09-15 15:49   ` [tip: objtool/core] " tip-bot2 for Peter Zijlstra
2021-06-24  9:41 ` [PATCH v2 05/24] x86/kvm: Always inline vmload() / vmsave() Peter Zijlstra
2021-09-15 15:49   ` [tip: objtool/core] " tip-bot2 for Peter Zijlstra
2021-06-24  9:41 ` [PATCH v2 06/24] x86: Always inline context_tracking_guest_enter() Peter Zijlstra
2021-08-20 23:22   ` Josh Poimboeuf
2021-08-20 23:34     ` Josh Poimboeuf
2021-08-25 12:16       ` Peter Zijlstra
     [not found]         ` <YSZxtBHNJzoUbqdE@ravnborg.org>
2021-08-26  4:10           ` Josh Poimboeuf
2021-08-25 13:38       ` Peter Zijlstra
2021-09-15 15:49   ` [tip: objtool/core] " tip-bot2 for Peter Zijlstra
2021-06-24  9:41 ` [PATCH v2 07/24] x86/kvm: Always inline to_svm() Peter Zijlstra
2021-09-15 15:49   ` [tip: objtool/core] " tip-bot2 for Peter Zijlstra
2021-06-24  9:41 ` [PATCH v2 08/24] x86/kvm: Always inline evmcs_write64() Peter Zijlstra
2021-09-15 15:49   ` [tip: objtool/core] " tip-bot2 for Peter Zijlstra
2021-06-24  9:41 ` [PATCH v2 09/24] x86: Always inline ip_within_syscall_gap() Peter Zijlstra
2021-09-15 15:49   ` [tip: objtool/core] " tip-bot2 for Peter Zijlstra
2021-06-24  9:41 ` [PATCH v2 10/24] x86/sev: Fix noinstr for vc_ghcb_invalidate() Peter Zijlstra
2021-09-15 15:49   ` [tip: objtool/core] " tip-bot2 for Peter Zijlstra
2021-06-24  9:41 ` [PATCH v2 11/24] locking/lockdep: Avoid RCU-induced noinstr fail Peter Zijlstra
2021-09-15 15:49   ` [tip: objtool/core] " tip-bot2 for Peter Zijlstra
2021-06-24  9:41 ` [PATCH v2 12/24] x86/paravirt: Mark arch_local_irq_*() __always_inline Peter Zijlstra
2021-06-24 10:51   ` Juergen Gross
2021-09-15 15:49   ` [tip: objtool/core] " tip-bot2 for Peter Zijlstra
2021-06-24  9:41 ` [PATCH v2 13/24] x86/paravirt: Use PVOP_* for paravirt calls Peter Zijlstra
2021-06-24 10:52   ` Juergen Gross
2021-09-15 15:49   ` [tip: objtool/core] " tip-bot2 for Peter Zijlstra
2021-06-24  9:41 ` [PATCH v2 14/24] x86/xen: Make read_cr2() noinstr Peter Zijlstra
2021-06-24 10:55   ` Juergen Gross
2021-09-15 15:49   ` [tip: objtool/core] " tip-bot2 for Peter Zijlstra
2021-09-17 12:58   ` tip-bot2 for Peter Zijlstra
2021-06-24  9:41 ` [PATCH v2 15/24] x86/xen: Make write_cr2() noinstr Peter Zijlstra
2021-06-24 10:56   ` Juergen Gross
2021-09-15 15:49   ` [tip: objtool/core] " tip-bot2 for Peter Zijlstra
2021-09-17 12:58   ` tip-bot2 for Peter Zijlstra
2021-06-24  9:41 ` [PATCH v2 16/24] x86/xen: Make get_debugreg() noinstr Peter Zijlstra
2021-06-24 10:57   ` Juergen Gross
2021-09-15 15:49   ` [tip: objtool/core] " tip-bot2 for Peter Zijlstra
2021-09-17 12:58   ` tip-bot2 for Peter Zijlstra
2021-06-24  9:41 ` [PATCH v2 17/24] x86/xen: Make set_debugreg() noinstr Peter Zijlstra
2021-06-24 10:59   ` Juergen Gross
2021-09-15 15:49   ` [tip: objtool/core] " tip-bot2 for Peter Zijlstra
2021-09-17 12:58   ` tip-bot2 for Peter Zijlstra [this message]
2021-06-24  9:41 ` [PATCH v2 18/24] x86/xen: Make save_fl() noinstr Peter Zijlstra
2021-06-24 11:07   ` Juergen Gross
2021-09-15 15:49   ` [tip: objtool/core] " tip-bot2 for Peter Zijlstra
2021-09-17 12:58   ` tip-bot2 for Peter Zijlstra
2021-06-24  9:41 ` [PATCH v2 19/24] x86/xen: Make hypercall_page noinstr Peter Zijlstra
2021-06-24 11:08   ` Juergen Gross
2021-09-15 15:49   ` [tip: objtool/core] " tip-bot2 for Peter Zijlstra
2021-09-17 12:58   ` tip-bot2 for Peter Zijlstra
2021-06-24  9:41 ` [PATCH v2 20/24] x86/xen: Make irq_enable() noinstr Peter Zijlstra
2021-06-24 11:09   ` Juergen Gross
2021-09-15 15:49   ` [tip: objtool/core] " tip-bot2 for Peter Zijlstra
2021-09-17 12:58   ` tip-bot2 for Peter Zijlstra
2021-06-24  9:41 ` [PATCH v2 21/24] x86/xen: Make irq_disable() noinstr Peter Zijlstra
2021-06-24 11:10   ` Juergen Gross
2021-09-15 15:49   ` [tip: objtool/core] " tip-bot2 for Peter Zijlstra
2021-09-17 12:58   ` tip-bot2 for Peter Zijlstra
2021-06-24  9:41 ` [PATCH v2 22/24] x86/xen: Mark xen_force_evtchn_callback() noinstr Peter Zijlstra
2021-06-24 11:11   ` Juergen Gross
2021-09-15 15:49   ` [tip: objtool/core] " tip-bot2 for Peter Zijlstra
2021-09-17 12:58   ` tip-bot2 for Peter Zijlstra
2021-06-24  9:41 ` [PATCH v2 23/24] x86/xen: Rework the xen_{cpu,irq,mmu}_ops[] arrays Peter Zijlstra
2021-06-24 12:12   ` Juergen Gross
2021-09-15 15:49   ` [tip: objtool/core] x86/xen: Rework the xen_{cpu,irq,mmu}_opsarrays tip-bot2 for Peter Zijlstra
2021-09-17 12:58   ` tip-bot2 for Peter Zijlstra
2021-06-24  9:41 ` [PATCH v2 24/24] objtool: Support pv_opsindirect calls for noinstr Peter Zijlstra
2021-09-15 15:49   ` [tip: objtool/core] " tip-bot2 for Peter Zijlstra
2021-09-17 12:58   ` tip-bot2 for Peter Zijlstra
2021-06-24 13:05 ` [PATCH v2 00/24] objtool/x86: noinstr vs PARAVIRT Steven Rostedt

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