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From: guoren@kernel.org
To: paul.walmsley@sifive.com, anup@brainfault.org,
	peterz@infradead.org, mingo@redhat.com, will@kernel.org,
	palmer@rivosinc.com, longman@redhat.com, boqun.feng@gmail.com,
	tglx@linutronix.de, paulmck@kernel.org, rostedt@goodmis.org,
	rdunlap@infradead.org, catalin.marinas@arm.com,
	conor.dooley@microchip.com, xiaoguang.xing@sophgo.com,
	bjorn@rivosinc.com, alexghiti@rivosinc.com,
	keescook@chromium.org, greentime.hu@sifive.com,
	ajones@ventanamicro.com, jszhang@kernel.org, wefu@redhat.com,
	wuwei2016@iscas.ac.cn
Cc: linux-arch@vger.kernel.org, linux-riscv@lists.infradead.org,
	linux-doc@vger.kernel.org, kvm@vger.kernel.org,
	virtualization@lists.linux-foundation.org,
	linux-csky@vger.kernel.org, Guo Ren <guoren@linux.alibaba.com>,
	Guo Ren <guoren@kernel.org>
Subject: [PATCH V10 16/19] RISC-V: paravirt: pvqspinlock: Add kconfig entry
Date: Wed,  2 Aug 2023 12:46:58 -0400	[thread overview]
Message-ID: <20230802164701.192791-17-guoren@kernel.org> (raw)
In-Reply-To: <20230802164701.192791-1-guoren@kernel.org>

From: Guo Ren <guoren@linux.alibaba.com>

Add kconfig entry for paravirt_spinlock, an unfair qspinlock
virtualization-friendly backend, by halting the virtual CPU rather
than spinning.

Signed-off-by: Guo Ren <guoren@linux.alibaba.com>
Signed-off-by: Guo Ren <guoren@kernel.org>
---
 arch/riscv/Kconfig | 12 ++++++++++++
 1 file changed, 12 insertions(+)

diff --git a/arch/riscv/Kconfig b/arch/riscv/Kconfig
index 42ae45c42b4d..13f345b54581 100644
--- a/arch/riscv/Kconfig
+++ b/arch/riscv/Kconfig
@@ -770,6 +770,7 @@ config RELOCATABLE
 config PARAVIRT
 	bool "Enable paravirtualization code"
 	depends on RISCV_SBI
+	select PARAVIRT_SPINLOCKS
 	default y
 	help
 	  This changes the kernel so it can modify itself when it is run
@@ -788,6 +789,17 @@ config PARAVIRT_TIME_ACCOUNTING
 
 	  If in doubt, say N here.
 
+config PARAVIRT_SPINLOCKS
+	bool "Paravirtualization layer for spinlocks"
+	depends on PARAVIRT && SMP
+	help
+	  Paravirtualized spinlocks allow a unfair qspinlock to replace the
+	  test-set kvm-guest virt spinlock implementation with something
+	  virtualization-friendly, for example, halt the virtual CPU rather
+	  than spinning.
+
+	  If you are unsure how to answer this question, answer Y.
+
 endmenu # "Kernel features"
 
 menu "Boot options"
-- 
2.36.1


WARNING: multiple messages have this Message-ID (diff)
From: guoren@kernel.org
To: paul.walmsley@sifive.com, anup@brainfault.org,
	peterz@infradead.org, mingo@redhat.com, will@kernel.org,
	palmer@rivosinc.com, longman@redhat.com, boqun.feng@gmail.com,
	tglx@linutronix.de, paulmck@kernel.org, rostedt@goodmis.org,
	rdunlap@infradead.org, catalin.marinas@arm.com,
	conor.dooley@microchip.com, xiaoguang.xing@sophgo.com,
	bjorn@rivosinc.com, alexghiti@rivosinc.com,
	keescook@chromium.org, greentime.hu@sifive.com,
	ajones@ventanamicro.com, jszhang@kernel.org, wefu@redhat.com,
	wuwei2016@iscas.ac.cn
Cc: linux-arch@vger.kernel.org, linux-riscv@lists.infradead.org,
	linux-doc@vger.kernel.org, kvm@vger.kernel.org,
	virtualization@lists.linux-foundation.org,
	linux-csky@vger.kernel.org, Guo Ren <guoren@linux.alibaba.com>,
	Guo Ren <guoren@kernel.org>
Subject: [PATCH V10 16/19] RISC-V: paravirt: pvqspinlock: Add kconfig entry
Date: Wed,  2 Aug 2023 12:46:58 -0400	[thread overview]
Message-ID: <20230802164701.192791-17-guoren@kernel.org> (raw)
In-Reply-To: <20230802164701.192791-1-guoren@kernel.org>

From: Guo Ren <guoren@linux.alibaba.com>

Add kconfig entry for paravirt_spinlock, an unfair qspinlock
virtualization-friendly backend, by halting the virtual CPU rather
than spinning.

Signed-off-by: Guo Ren <guoren@linux.alibaba.com>
Signed-off-by: Guo Ren <guoren@kernel.org>
---
 arch/riscv/Kconfig | 12 ++++++++++++
 1 file changed, 12 insertions(+)

diff --git a/arch/riscv/Kconfig b/arch/riscv/Kconfig
index 42ae45c42b4d..13f345b54581 100644
--- a/arch/riscv/Kconfig
+++ b/arch/riscv/Kconfig
@@ -770,6 +770,7 @@ config RELOCATABLE
 config PARAVIRT
 	bool "Enable paravirtualization code"
 	depends on RISCV_SBI
+	select PARAVIRT_SPINLOCKS
 	default y
 	help
 	  This changes the kernel so it can modify itself when it is run
@@ -788,6 +789,17 @@ config PARAVIRT_TIME_ACCOUNTING
 
 	  If in doubt, say N here.
 
+config PARAVIRT_SPINLOCKS
+	bool "Paravirtualization layer for spinlocks"
+	depends on PARAVIRT && SMP
+	help
+	  Paravirtualized spinlocks allow a unfair qspinlock to replace the
+	  test-set kvm-guest virt spinlock implementation with something
+	  virtualization-friendly, for example, halt the virtual CPU rather
+	  than spinning.
+
+	  If you are unsure how to answer this question, answer Y.
+
 endmenu # "Kernel features"
 
 menu "Boot options"
-- 
2.36.1


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

  parent reply	other threads:[~2023-08-02 16:53 UTC|newest]

Thread overview: 77+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2023-08-02 16:46 [PATCH V10 00/19] riscv: Add Native/Paravirt/CNA qspinlock support guoren
2023-08-02 16:46 ` guoren
2023-08-02 16:46 ` [PATCH V10 01/19] asm-generic: ticket-lock: Reuse arch_spinlock_t of qspinlock guoren
2023-08-02 16:46   ` guoren
2023-08-02 16:46 ` [PATCH V10 02/19] asm-generic: ticket-lock: Move into ticket_spinlock.h guoren
2023-08-02 16:46   ` guoren
2023-08-02 16:46 ` [PATCH V10 03/19] riscv: qspinlock: errata: Add ERRATA_THEAD_WRITE_ONCE fixup guoren
2023-08-02 16:46   ` guoren
2023-08-02 16:46 ` [PATCH V10 04/19] riscv: qspinlock: Add basic queued_spinlock support guoren
2023-08-02 16:46   ` guoren
2023-08-11 19:34   ` Waiman Long
2023-08-11 19:34     ` Waiman Long
2023-08-11 19:34     ` Waiman Long
2023-08-12  0:18     ` Guo Ren
2023-08-12  0:18       ` Guo Ren
2023-08-02 16:46 ` [PATCH V10 05/19] riscv: qspinlock: Introduce combo spinlock guoren
2023-08-02 16:46   ` guoren
2023-08-11 19:51   ` Waiman Long
2023-08-11 19:51     ` Waiman Long
2023-08-11 19:51     ` Waiman Long
2023-08-12  0:22     ` Guo Ren
2023-08-12  0:22       ` Guo Ren
2023-08-02 16:46 ` [PATCH V10 06/19] riscv: qspinlock: Allow force qspinlock from the command line guoren
2023-08-02 16:46   ` guoren
2023-08-02 16:46 ` [PATCH V10 07/19] riscv: qspinlock: errata: Introduce ERRATA_THEAD_QSPINLOCK guoren
2023-08-02 16:46   ` guoren
2023-08-04  9:05   ` Conor Dooley
2023-08-04  9:05     ` Conor Dooley
2023-08-04  9:53     ` Guo Ren
2023-08-04  9:53       ` Guo Ren
2023-08-04 10:06       ` Conor Dooley
2023-08-04 10:06         ` Conor Dooley
2023-08-05  1:28         ` Guo Ren
2023-08-05  1:28           ` Guo Ren
2023-08-07  5:23   ` Stefan O'Rear
2023-08-07  5:23     ` Stefan O'Rear
2023-08-08  2:12     ` Guo Ren
2023-08-08  2:12       ` Guo Ren
2023-09-13 18:54     ` Palmer Dabbelt
2023-09-13 18:54       ` Palmer Dabbelt
2023-09-13 19:32       ` Waiman Long
2023-09-13 19:32         ` Waiman Long
2023-09-13 19:32         ` Waiman Long
2023-09-14  3:31       ` Guo Ren
2023-09-14  3:31         ` Guo Ren
2023-08-02 16:46 ` [PATCH V10 08/19] riscv: qspinlock: Use new static key for controlling call of virt_spin_lock() guoren
2023-08-02 16:46   ` guoren
2023-08-02 16:46 ` [PATCH V10 09/19] RISC-V: paravirt: pvqspinlock: Add paravirt qspinlock skeleton guoren
2023-08-02 16:46   ` guoren
2023-08-02 16:46 ` [PATCH V10 10/19] RISC-V: paravirt: pvqspinlock: KVM: " guoren
2023-08-02 16:46   ` guoren
2023-08-02 16:46 ` [PATCH V10 11/19] RISC-V: paravirt: pvqspinlock: KVM: Implement kvm_sbi_ext_pvlock_kick_cpu() guoren
2023-08-02 16:46   ` guoren
2023-08-02 16:46 ` [PATCH V10 12/19] RISC-V: paravirt: pvqspinlock: Add nopvspin kernel parameter guoren
2023-08-02 16:46   ` guoren
2023-08-02 16:46 ` [PATCH V10 13/19] RISC-V: paravirt: pvqspinlock: Remove unnecessary definitions of cmpxchg & xchg guoren
2023-08-02 16:46   ` guoren
2023-08-02 16:46 ` [PATCH V10 14/19] RISC-V: paravirt: pvqspinlock: Add xchg8 & cmpxchg_small support guoren
2023-08-02 16:46   ` guoren
2023-08-02 16:46 ` [PATCH V10 15/19] RISC-V: paravirt: pvqspinlock: Add SBI implementation guoren
2023-08-02 16:46   ` guoren
2023-08-02 16:46 ` guoren [this message]
2023-08-02 16:46   ` [PATCH V10 16/19] RISC-V: paravirt: pvqspinlock: Add kconfig entry guoren
2023-08-02 16:46 ` [PATCH V10 17/19] RISC-V: paravirt: pvqspinlock: Add trace point for pv_kick/wait guoren
2023-08-02 16:46   ` guoren
2023-08-02 16:47 ` [PATCH V10 18/19] locking/qspinlock: Move pv_ops into x86 directory guoren
2023-08-02 16:47   ` guoren
2023-08-11 20:42   ` Waiman Long
2023-08-11 20:42     ` Waiman Long
2023-08-11 20:42     ` Waiman Long
2023-08-12  0:24     ` Guo Ren
2023-08-12  0:24       ` Guo Ren
2023-08-12  0:47       ` Waiman Long
2023-08-12  0:47         ` Waiman Long
2023-08-12  0:47         ` Waiman Long
2023-08-02 16:47 ` [PATCH V10 19/19] locking/qspinlock: riscv: Add Compact NUMA-aware lock support guoren
2023-08-02 16:47   ` guoren

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