From: Mihai Carabas <mihai.carabas@oracle.com>
Cc: "Joao Martins" <joao.m.martins@oracle.com>,
"Mihai Carabas" <mihai.carabas@oracle.com>,
"Catalin Marinas" <catalin.marinas@arm.com>,
"Will Deacon" <will@kernel.org>,
"Thomas Gleixner" <tglx@linutronix.de>,
"Ingo Molnar" <mingo@redhat.com>,
"Borislav Petkov" <bp@alien8.de>,
"Dave Hansen" <dave.hansen@linux.intel.com>,
x86@kernel.org, "H. Peter Anvin" <hpa@zytor.com>,
"Paolo Bonzini" <pbonzini@redhat.com>,
"Wanpeng Li" <wanpengli@tencent.com>,
"Vitaly Kuznetsov" <vkuznets@redhat.com>,
"Rafael J. Wysocki" <rafael@kernel.org>,
"Daniel Lezcano" <daniel.lezcano@linaro.org>,
"Andrew Morton" <akpm@linux-foundation.org>,
"Kees Cook" <keescook@chromium.org>,
"Peter Zijlstra" <peterz@infradead.org>,
"Petr Mladek" <pmladek@suse.com>,
"Ard Biesheuvel" <ardb@kernel.org>,
"Sami Tolvanen" <samitolvanen@google.com>,
"Nicholas Piggin" <npiggin@gmail.com>,
"Juerg Haefliger" <juerg.haefliger@canonical.com>,
"Mickaël Salaün" <mic@digikod.net>,
"Arnd Bergmann" <arnd@arndb.de>,
"Ankur Arora" <ankur.a.arora@oracle.com>,
linux-kernel@vger.kernel.org,
linux-arm-kernel@lists.infradead.org, kvm@vger.kernel.org,
linux-pm@vger.kernel.org
Subject: [PATCH 6/7] arm64: Define TIF_POLLING_NRFLAG
Date: Wed, 9 Aug 2023 14:39:40 +0300 [thread overview]
Message-ID: <1691581193-8416-7-git-send-email-mihai.carabas@oracle.com> (raw)
In-Reply-To: <1691581193-8416-1-git-send-email-mihai.carabas@oracle.com>
From: Joao Martins <joao.m.martins@oracle.com>
The default idle method for arm64 is WFI and it therefore
unconditionally requires the reschedule interrupt when idle.
Commit 842514849a61 ("arm64: Remove TIF_POLLING_NRFLAG") had
reverted it because WFI was the only idle method. ARM64 support
for haltpoll means that poll_idle() polls for TIF_POLLING_NRFLAG,
so define on arm64 *only if* haltpoll is built, using the same bit.
Signed-off-by: Joao Martins <joao.m.martins@oracle.com>
Signed-off-by: Mihai Carabas <mihai.carabas@oracle.com>
---
arch/arm64/include/asm/thread_info.h | 6 ++++++
1 file changed, 6 insertions(+)
diff --git a/arch/arm64/include/asm/thread_info.h b/arch/arm64/include/asm/thread_info.h
index 553d1bc559c6..d3010d0b2988 100644
--- a/arch/arm64/include/asm/thread_info.h
+++ b/arch/arm64/include/asm/thread_info.h
@@ -69,6 +69,9 @@ struct thread_info {
#define TIF_SYSCALL_TRACEPOINT 10 /* syscall tracepoint for ftrace */
#define TIF_SECCOMP 11 /* syscall secure computing */
#define TIF_SYSCALL_EMU 12 /* syscall emulation active */
+#if IS_ENABLED(CONFIG_HALTPOLL_CPUIDLE) || IS_ENABLED(CONFIG_HALTPOLL_CPUIDLE_MODULE)
+#define TIF_POLLING_NRFLAG 16 /* poll_idle() polls TIF_NEED_RESCHED */
+#endif
#define TIF_MEMDIE 18 /* is terminating due to OOM killer */
#define TIF_FREEZE 19
#define TIF_RESTORE_SIGMASK 20
@@ -90,6 +93,9 @@ struct thread_info {
#define _TIF_SYSCALL_TRACEPOINT (1 << TIF_SYSCALL_TRACEPOINT)
#define _TIF_SECCOMP (1 << TIF_SECCOMP)
#define _TIF_SYSCALL_EMU (1 << TIF_SYSCALL_EMU)
+#if IS_ENABLED(CONFIG_HALTPOLL_CPUIDLE) || IS_ENABLED(CONFIG_HALTPOLL_CPUIDLE_MODULE)
+#define _TIF_POLLING_NRFLAG (1 << TIF_POLLING_NRFLAG)
+#endif
#define _TIF_UPROBE (1 << TIF_UPROBE)
#define _TIF_SINGLESTEP (1 << TIF_SINGLESTEP)
#define _TIF_32BIT (1 << TIF_32BIT)
--
1.8.3.1
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next prev parent reply other threads:[~2023-08-09 12:55 UTC|newest]
Thread overview: 14+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-08-09 11:39 [PATCH] Enable haltpoll for arm64 Mihai Carabas
2023-08-09 11:39 ` [PATCH 1/7] cpuidle-haltpoll: Make boot_option_idle_override check X86 specific Mihai Carabas
2023-08-10 19:22 ` Rafael J. Wysocki
2023-08-09 11:39 ` [PATCH 2/7] x86: Move ARCH_HAS_CPU_RELAX to arch Mihai Carabas
2023-08-09 11:39 ` [PATCH 3/7] x86/kvm: Move haltpoll_want() to be arch defined Mihai Carabas
2023-08-09 11:39 ` [PATCH 4/7] governors/haltpoll: Drop kvm_para_available() check Mihai Carabas
2023-08-10 19:25 ` Rafael J. Wysocki
2023-08-09 11:39 ` [PATCH 5/7] arm64: Select ARCH_HAS_CPU_RELAX Mihai Carabas
2023-08-09 13:49 ` Peter Zijlstra
2023-08-29 14:49 ` Russell King (Oracle)
2023-08-09 11:39 ` Mihai Carabas [this message]
2023-08-09 11:39 ` [PATCH 7/7] cpuidle-haltpoll: ARM64 support Mihai Carabas
2023-08-09 13:48 ` [PATCH] Enable haltpoll for arm64 Peter Zijlstra
2023-08-29 14:31 ` Mihai Carabas
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