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, leobras@redhat.com
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 V11 16/17] RISC-V: paravirt: pvqspinlock: KVM: Add paravirt qspinlock skeleton
Date: Sun, 10 Sep 2023 04:29:10 -0400 [thread overview]
Message-ID: <20230910082911.3378782-17-guoren@kernel.org> (raw)
In-Reply-To: <20230910082911.3378782-1-guoren@kernel.org>
From: Guo Ren <guoren@linux.alibaba.com>
Add the files functions needed to support the SBI PVLOCK (paravirt
qspinlock kick_cpu) extension. This is a preparation for the next
core implementation of kick_cpu.
Signed-off-by: Guo Ren <guoren@linux.alibaba.com>
Signed-off-by: Guo Ren <guoren@kernel.org>
---
arch/riscv/include/asm/kvm_vcpu_sbi.h | 1 +
arch/riscv/include/uapi/asm/kvm.h | 1 +
arch/riscv/kvm/Makefile | 1 +
arch/riscv/kvm/vcpu_sbi.c | 4 +++
arch/riscv/kvm/vcpu_sbi_pvlock.c | 38 +++++++++++++++++++++++++++
5 files changed, 45 insertions(+)
create mode 100644 arch/riscv/kvm/vcpu_sbi_pvlock.c
diff --git a/arch/riscv/include/asm/kvm_vcpu_sbi.h b/arch/riscv/include/asm/kvm_vcpu_sbi.h
index cdcf0ff07be7..7b4d60b54d7e 100644
--- a/arch/riscv/include/asm/kvm_vcpu_sbi.h
+++ b/arch/riscv/include/asm/kvm_vcpu_sbi.h
@@ -71,6 +71,7 @@ extern const struct kvm_vcpu_sbi_extension vcpu_sbi_ext_srst;
extern const struct kvm_vcpu_sbi_extension vcpu_sbi_ext_hsm;
extern const struct kvm_vcpu_sbi_extension vcpu_sbi_ext_experimental;
extern const struct kvm_vcpu_sbi_extension vcpu_sbi_ext_vendor;
+extern const struct kvm_vcpu_sbi_extension vcpu_sbi_ext_pvlock;
#ifdef CONFIG_RISCV_PMU_SBI
extern const struct kvm_vcpu_sbi_extension vcpu_sbi_ext_pmu;
diff --git a/arch/riscv/include/uapi/asm/kvm.h b/arch/riscv/include/uapi/asm/kvm.h
index 992c5e407104..d005c229f2da 100644
--- a/arch/riscv/include/uapi/asm/kvm.h
+++ b/arch/riscv/include/uapi/asm/kvm.h
@@ -148,6 +148,7 @@ enum KVM_RISCV_SBI_EXT_ID {
KVM_RISCV_SBI_EXT_PMU,
KVM_RISCV_SBI_EXT_EXPERIMENTAL,
KVM_RISCV_SBI_EXT_VENDOR,
+ KVM_RISCV_SBI_EXT_PVLOCK,
KVM_RISCV_SBI_EXT_MAX,
};
diff --git a/arch/riscv/kvm/Makefile b/arch/riscv/kvm/Makefile
index 4c2067fc59fc..6112750a3a0c 100644
--- a/arch/riscv/kvm/Makefile
+++ b/arch/riscv/kvm/Makefile
@@ -26,6 +26,7 @@ kvm-$(CONFIG_RISCV_SBI_V01) += vcpu_sbi_v01.o
kvm-y += vcpu_sbi_base.o
kvm-y += vcpu_sbi_replace.o
kvm-y += vcpu_sbi_hsm.o
+kvm-y += vcpu_sbi_pvlock.o
kvm-y += vcpu_timer.o
kvm-$(CONFIG_RISCV_PMU_SBI) += vcpu_pmu.o vcpu_sbi_pmu.o
kvm-y += aia.o
diff --git a/arch/riscv/kvm/vcpu_sbi.c b/arch/riscv/kvm/vcpu_sbi.c
index 9cd97091c723..c03c3d489b2b 100644
--- a/arch/riscv/kvm/vcpu_sbi.c
+++ b/arch/riscv/kvm/vcpu_sbi.c
@@ -74,6 +74,10 @@ static const struct kvm_riscv_sbi_extension_entry sbi_ext[] = {
.ext_idx = KVM_RISCV_SBI_EXT_VENDOR,
.ext_ptr = &vcpu_sbi_ext_vendor,
},
+ {
+ .ext_idx = KVM_RISCV_SBI_EXT_PVLOCK,
+ .ext_ptr = &vcpu_sbi_ext_pvlock,
+ },
};
void kvm_riscv_vcpu_sbi_forward(struct kvm_vcpu *vcpu, struct kvm_run *run)
diff --git a/arch/riscv/kvm/vcpu_sbi_pvlock.c b/arch/riscv/kvm/vcpu_sbi_pvlock.c
new file mode 100644
index 000000000000..544a456c5041
--- /dev/null
+++ b/arch/riscv/kvm/vcpu_sbi_pvlock.c
@@ -0,0 +1,38 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Copyright (c), 2023 Alibaba Cloud
+ *
+ * Authors:
+ * Guo Ren <guoren@linux.alibaba.com>
+ */
+
+#include <linux/errno.h>
+#include <linux/err.h>
+#include <linux/kvm_host.h>
+#include <asm/sbi.h>
+#include <asm/kvm_vcpu_sbi.h>
+
+static int kvm_sbi_ext_pvlock_handler(struct kvm_vcpu *vcpu, struct kvm_run *run,
+ struct kvm_vcpu_sbi_return *retdata)
+{
+ int ret = 0;
+ struct kvm_cpu_context *cp = &vcpu->arch.guest_context;
+ unsigned long funcid = cp->a6;
+
+ switch (funcid) {
+ case SBI_EXT_PVLOCK_KICK_CPU:
+ break;
+ default:
+ ret = SBI_ERR_NOT_SUPPORTED;
+ }
+
+ retdata->err_val = ret;
+
+ return 0;
+}
+
+const struct kvm_vcpu_sbi_extension vcpu_sbi_ext_pvlock = {
+ .extid_start = SBI_EXT_PVLOCK,
+ .extid_end = SBI_EXT_PVLOCK,
+ .handler = kvm_sbi_ext_pvlock_handler,
+};
--
2.36.1
next prev parent reply other threads:[~2023-09-10 8:32 UTC|newest]
Thread overview: 105+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-09-10 8:28 [PATCH V11 00/17] riscv: Add Native/Paravirt qspinlock support guoren
2023-09-10 8:28 ` [PATCH V11 01/17] asm-generic: ticket-lock: Reuse arch_spinlock_t of qspinlock guoren
2023-09-11 19:05 ` Leonardo Brás
2023-09-13 1:55 ` Guo Ren
2023-09-13 7:59 ` Leonardo Bras
2023-09-10 8:28 ` [PATCH V11 02/17] asm-generic: ticket-lock: Move into ticket_spinlock.h guoren
2023-09-13 8:15 ` Leonardo Bras
2023-09-10 8:28 ` [PATCH V11 03/17] riscv: Use Zicbop in arch_xchg when available guoren
2023-09-13 8:49 ` Leonardo Bras
2023-09-15 12:36 ` Guo Ren
2023-09-16 1:25 ` Leonardo Bras
2023-09-17 14:34 ` Guo Ren
2023-09-19 5:13 ` Leonardo Bras
2023-09-19 7:53 ` Guo Ren
2023-09-19 14:38 ` Leonardo Bras
2023-09-14 13:47 ` Andrew Jones
2023-09-15 8:22 ` Leonardo Bras
2023-09-15 11:07 ` Andrew Jones
2023-09-15 11:26 ` Conor Dooley
2023-09-15 12:22 ` Andrew Jones
2023-09-15 12:42 ` Conor Dooley
2023-09-16 0:05 ` Conor Dooley
2023-09-15 20:32 ` Leonardo Bras
2023-09-14 14:25 ` Andrew Jones
2023-09-14 14:47 ` Andrew Jones
2023-09-15 11:37 ` Conor Dooley
2023-09-15 12:14 ` Andrew Jones
2023-09-15 12:53 ` Conor Dooley
2023-12-31 8:29 ` guoren
2023-09-10 8:28 ` [PATCH V11 04/17] locking/qspinlock: Improve xchg_tail for number of cpus >= 16k guoren
2023-09-11 2:35 ` Waiman Long
2023-09-11 3:09 ` Guo Ren
2023-09-11 13:03 ` Waiman Long
2023-09-12 1:10 ` Guo Ren
2023-09-13 8:55 ` Leonardo Bras
2023-09-13 12:52 ` Guo Ren
2023-09-13 13:06 ` Waiman Long
2023-09-14 3:45 ` Guo Ren
2023-09-10 8:28 ` [PATCH V11 05/17] riscv: qspinlock: Add basic queued_spinlock support guoren
2023-09-13 20:28 ` Leonardo Bras
2023-09-14 4:46 ` Guo Ren
2023-09-14 9:43 ` Leonardo Bras
2023-09-15 2:10 ` Guo Ren
2023-09-15 9:08 ` Leonardo Bras
2023-09-17 15:02 ` Guo Ren
2023-09-19 5:20 ` Leonardo Bras
2023-09-10 8:29 ` [PATCH V11 06/17] riscv: qspinlock: Introduce combo spinlock guoren
2023-09-10 11:06 ` Guo Ren
2023-09-13 20:37 ` Leonardo Bras
2023-09-13 20:49 ` Leonardo Bras
2023-09-14 4:49 ` Guo Ren
2023-09-14 7:17 ` Leonardo Bras
2023-09-10 8:29 ` [PATCH V11 07/17] riscv: qspinlock: Introduce qspinlock param for command line guoren
2023-09-11 15:22 ` Waiman Long
2023-09-12 1:06 ` Guo Ren
2023-09-11 15:34 ` Waiman Long
2023-09-12 1:08 ` Guo Ren
2023-09-14 7:32 ` Leonardo Bras
2023-09-14 17:23 ` Waiman Long
2023-09-10 8:29 ` [PATCH V11 08/17] riscv: qspinlock: Add virt_spin_lock() support for KVM guest guoren
2023-09-14 8:02 ` Leonardo Bras
2023-09-17 15:12 ` Guo Ren
2023-09-19 5:30 ` Leonardo Bras
2023-09-19 8:04 ` Guo Ren
2023-09-19 14:40 ` Leonardo Bras
2023-09-10 8:29 ` [PATCH V11 09/17] riscv: qspinlock: errata: Add ERRATA_THEAD_WRITE_ONCE fixup guoren
2023-09-14 8:32 ` Leonardo Bras
2023-09-17 15:15 ` Guo Ren
2023-09-19 5:34 ` Leonardo Bras
2023-09-10 8:29 ` [PATCH V11 10/17] riscv: qspinlock: errata: Enable qspinlock for T-HEAD processors guoren
2023-09-14 9:36 ` Leonardo Bras
2023-09-10 8:29 ` [PATCH V11 11/17] RISC-V: paravirt: pvqspinlock: Add paravirt qspinlock skeleton guoren
2023-09-15 5:42 ` Leonardo Bras
2023-09-17 14:58 ` Guo Ren
2023-09-19 5:43 ` Leonardo Bras
2023-09-10 8:29 ` [PATCH V11 12/17] RISC-V: paravirt: pvqspinlock: Add nopvspin kernel parameter guoren
2023-09-15 6:05 ` Leonardo Bras
2023-09-17 15:03 ` Guo Ren
2023-09-19 5:44 ` Leonardo Bras
2023-09-10 8:29 ` [PATCH V11 13/17] RISC-V: paravirt: pvqspinlock: Add SBI implementation guoren
2023-09-15 6:23 ` Leonardo Bras
2023-09-17 15:06 ` Guo Ren
2023-09-19 5:45 ` Leonardo Bras
2023-09-10 8:29 ` [PATCH V11 14/17] RISC-V: paravirt: pvqspinlock: Add kconfig entry guoren
2023-09-15 6:25 ` Leonardo Bras
2023-09-10 8:29 ` [PATCH V11 15/17] RISC-V: paravirt: pvqspinlock: Add trace point for pv_kick/wait guoren
2023-09-15 6:33 ` Leonardo Bras
2023-09-10 8:29 ` guoren [this message]
2023-09-15 6:46 ` [PATCH V11 16/17] RISC-V: paravirt: pvqspinlock: KVM: Add paravirt qspinlock skeleton Leonardo Bras
2023-09-10 8:29 ` [PATCH V11 17/17] RISC-V: paravirt: pvqspinlock: KVM: Implement kvm_sbi_ext_pvlock_kick_cpu() guoren
2023-09-15 6:52 ` Leonardo Bras
2023-09-10 8:58 ` [PATCH V11 00/17] riscv: Add Native/Paravirt qspinlock support Conor Dooley
2023-09-10 9:16 ` Guo Ren
2023-09-10 9:20 ` Guo Ren
2023-09-10 9:31 ` Conor Dooley
2023-09-10 9:49 ` Guo Ren
2023-09-10 19:45 ` Conor Dooley
2023-09-11 3:36 ` Guo Ren
2023-09-11 12:52 ` Conor Dooley
2023-09-12 1:33 ` Guo Ren
2023-09-12 8:07 ` Conor Dooley
2023-09-12 10:58 ` Guo Ren
2023-11-06 20:42 ` Leonardo Bras
2023-11-12 4:23 ` Guo Ren
2023-11-13 10:19 ` Leonardo Bras Soares Passos
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