From: Jingyi Wang <wangjingyi11@huawei.com>
To: <kvm@vger.kernel.org>, <kvmarm@lists.cs.columbia.edu>,
<linux-arm-kernel@lists.infradead.org>
Cc: <will@kernel.org>, <catalin.marinas@arm.com>, <maz@kernel.org>,
<james.morse@arm.com>, <julien.thierry.kdev@gmail.com>,
<suzuki.poulose@arm.com>, <wanghaibin.wang@huawei.com>,
<yezengruan@huawei.com>, <shameerali.kolothum.thodi@huawei.com>,
<fanhenglong@huawei.com>, <wangjingyi11@huawei.com>,
<prime.zeng@hisilicon.com>
Subject: [RFC PATCH 1/4] arm64: cpufeature: TWED support detection
Date: Tue, 29 Sep 2020 17:17:24 +0800 [thread overview]
Message-ID: <20200929091727.8692-2-wangjingyi11@huawei.com> (raw)
In-Reply-To: <20200929091727.8692-1-wangjingyi11@huawei.com>
From: Zengruan Ye <yezengruan@huawei.com>
TWE Delay is an optional feature in ARMv8.6 Extentions. This patch
detect this feature.
Signed-off-by: Zengruan Ye <yezengruan@huawei.com>
Signed-off-by: Jingyi Wang <wangjingyi11@huawei.com>
---
arch/arm64/Kconfig | 10 ++++++++++
arch/arm64/include/asm/cpucaps.h | 3 ++-
arch/arm64/kernel/cpufeature.c | 12 ++++++++++++
3 files changed, 24 insertions(+), 1 deletion(-)
diff --git a/arch/arm64/Kconfig b/arch/arm64/Kconfig
index 6d232837cbee..fe66f4fc5f49 100644
--- a/arch/arm64/Kconfig
+++ b/arch/arm64/Kconfig
@@ -1666,6 +1666,16 @@ config ARCH_RANDOM
endmenu
+menu "ARMv8.6 architectural features"
+
+config ARM64_TWED
+ bool "Enable suppot for delayed trapping of WFE"
+ default y
+ help
+ Delayed Trapping of WFE (part of the ARMv8.6 Extensions)
+
+endmenu
+
config ARM64_SVE
bool "ARM Scalable Vector Extension support"
default y
diff --git a/arch/arm64/include/asm/cpucaps.h b/arch/arm64/include/asm/cpucaps.h
index 07b643a70710..7b8f018d142b 100644
--- a/arch/arm64/include/asm/cpucaps.h
+++ b/arch/arm64/include/asm/cpucaps.h
@@ -64,7 +64,8 @@
#define ARM64_BTI 54
#define ARM64_HAS_ARMv8_4_TTL 55
#define ARM64_HAS_TLB_RANGE 56
+#define ARM64_HAS_TWED 57
-#define ARM64_NCAPS 57
+#define ARM64_NCAPS 58
#endif /* __ASM_CPUCAPS_H */
diff --git a/arch/arm64/kernel/cpufeature.c b/arch/arm64/kernel/cpufeature.c
index 6424584be01e..d042d32a1144 100644
--- a/arch/arm64/kernel/cpufeature.c
+++ b/arch/arm64/kernel/cpufeature.c
@@ -2120,6 +2120,18 @@ static const struct arm64_cpu_capabilities arm64_features[] = {
.min_field_value = ID_AA64PFR1_BT_BTI,
.sign = FTR_UNSIGNED,
},
+#endif
+#ifdef CONFIG_ARM64_TWED
+ {
+ .desc = "Delayed Trapping of WFE",
+ .capability = ARM64_HAS_TWED,
+ .type = ARM64_CPUCAP_SYSTEM_FEATURE,
+ .matches = has_cpuid_feature,
+ .sys_reg = SYS_ID_AA64MMFR1_EL1,
+ .field_pos = ID_AA64MMFR1_TWED_SHIFT,
+ .sign = FTR_UNSIGNED,
+ .min_field_value = 1,
+ },
#endif
{},
};
--
2.19.1
WARNING: multiple messages have this Message-ID (diff)
From: Jingyi Wang <wangjingyi11@huawei.com>
To: <kvm@vger.kernel.org>, <kvmarm@lists.cs.columbia.edu>,
<linux-arm-kernel@lists.infradead.org>
Cc: catalin.marinas@arm.com, fanhenglong@huawei.com,
prime.zeng@hisilicon.com, maz@kernel.org, will@kernel.org
Subject: [RFC PATCH 1/4] arm64: cpufeature: TWED support detection
Date: Tue, 29 Sep 2020 17:17:24 +0800 [thread overview]
Message-ID: <20200929091727.8692-2-wangjingyi11@huawei.com> (raw)
In-Reply-To: <20200929091727.8692-1-wangjingyi11@huawei.com>
From: Zengruan Ye <yezengruan@huawei.com>
TWE Delay is an optional feature in ARMv8.6 Extentions. This patch
detect this feature.
Signed-off-by: Zengruan Ye <yezengruan@huawei.com>
Signed-off-by: Jingyi Wang <wangjingyi11@huawei.com>
---
arch/arm64/Kconfig | 10 ++++++++++
arch/arm64/include/asm/cpucaps.h | 3 ++-
arch/arm64/kernel/cpufeature.c | 12 ++++++++++++
3 files changed, 24 insertions(+), 1 deletion(-)
diff --git a/arch/arm64/Kconfig b/arch/arm64/Kconfig
index 6d232837cbee..fe66f4fc5f49 100644
--- a/arch/arm64/Kconfig
+++ b/arch/arm64/Kconfig
@@ -1666,6 +1666,16 @@ config ARCH_RANDOM
endmenu
+menu "ARMv8.6 architectural features"
+
+config ARM64_TWED
+ bool "Enable suppot for delayed trapping of WFE"
+ default y
+ help
+ Delayed Trapping of WFE (part of the ARMv8.6 Extensions)
+
+endmenu
+
config ARM64_SVE
bool "ARM Scalable Vector Extension support"
default y
diff --git a/arch/arm64/include/asm/cpucaps.h b/arch/arm64/include/asm/cpucaps.h
index 07b643a70710..7b8f018d142b 100644
--- a/arch/arm64/include/asm/cpucaps.h
+++ b/arch/arm64/include/asm/cpucaps.h
@@ -64,7 +64,8 @@
#define ARM64_BTI 54
#define ARM64_HAS_ARMv8_4_TTL 55
#define ARM64_HAS_TLB_RANGE 56
+#define ARM64_HAS_TWED 57
-#define ARM64_NCAPS 57
+#define ARM64_NCAPS 58
#endif /* __ASM_CPUCAPS_H */
diff --git a/arch/arm64/kernel/cpufeature.c b/arch/arm64/kernel/cpufeature.c
index 6424584be01e..d042d32a1144 100644
--- a/arch/arm64/kernel/cpufeature.c
+++ b/arch/arm64/kernel/cpufeature.c
@@ -2120,6 +2120,18 @@ static const struct arm64_cpu_capabilities arm64_features[] = {
.min_field_value = ID_AA64PFR1_BT_BTI,
.sign = FTR_UNSIGNED,
},
+#endif
+#ifdef CONFIG_ARM64_TWED
+ {
+ .desc = "Delayed Trapping of WFE",
+ .capability = ARM64_HAS_TWED,
+ .type = ARM64_CPUCAP_SYSTEM_FEATURE,
+ .matches = has_cpuid_feature,
+ .sys_reg = SYS_ID_AA64MMFR1_EL1,
+ .field_pos = ID_AA64MMFR1_TWED_SHIFT,
+ .sign = FTR_UNSIGNED,
+ .min_field_value = 1,
+ },
#endif
{},
};
--
2.19.1
_______________________________________________
kvmarm mailing list
kvmarm@lists.cs.columbia.edu
https://lists.cs.columbia.edu/mailman/listinfo/kvmarm
WARNING: multiple messages have this Message-ID (diff)
From: Jingyi Wang <wangjingyi11@huawei.com>
To: <kvm@vger.kernel.org>, <kvmarm@lists.cs.columbia.edu>,
<linux-arm-kernel@lists.infradead.org>
Cc: suzuki.poulose@arm.com, catalin.marinas@arm.com,
wangjingyi11@huawei.com, shameerali.kolothum.thodi@huawei.com,
yezengruan@huawei.com, fanhenglong@huawei.com,
james.morse@arm.com, prime.zeng@hisilicon.com, maz@kernel.org,
wanghaibin.wang@huawei.com, will@kernel.org,
julien.thierry.kdev@gmail.com
Subject: [RFC PATCH 1/4] arm64: cpufeature: TWED support detection
Date: Tue, 29 Sep 2020 17:17:24 +0800 [thread overview]
Message-ID: <20200929091727.8692-2-wangjingyi11@huawei.com> (raw)
In-Reply-To: <20200929091727.8692-1-wangjingyi11@huawei.com>
From: Zengruan Ye <yezengruan@huawei.com>
TWE Delay is an optional feature in ARMv8.6 Extentions. This patch
detect this feature.
Signed-off-by: Zengruan Ye <yezengruan@huawei.com>
Signed-off-by: Jingyi Wang <wangjingyi11@huawei.com>
---
arch/arm64/Kconfig | 10 ++++++++++
arch/arm64/include/asm/cpucaps.h | 3 ++-
arch/arm64/kernel/cpufeature.c | 12 ++++++++++++
3 files changed, 24 insertions(+), 1 deletion(-)
diff --git a/arch/arm64/Kconfig b/arch/arm64/Kconfig
index 6d232837cbee..fe66f4fc5f49 100644
--- a/arch/arm64/Kconfig
+++ b/arch/arm64/Kconfig
@@ -1666,6 +1666,16 @@ config ARCH_RANDOM
endmenu
+menu "ARMv8.6 architectural features"
+
+config ARM64_TWED
+ bool "Enable suppot for delayed trapping of WFE"
+ default y
+ help
+ Delayed Trapping of WFE (part of the ARMv8.6 Extensions)
+
+endmenu
+
config ARM64_SVE
bool "ARM Scalable Vector Extension support"
default y
diff --git a/arch/arm64/include/asm/cpucaps.h b/arch/arm64/include/asm/cpucaps.h
index 07b643a70710..7b8f018d142b 100644
--- a/arch/arm64/include/asm/cpucaps.h
+++ b/arch/arm64/include/asm/cpucaps.h
@@ -64,7 +64,8 @@
#define ARM64_BTI 54
#define ARM64_HAS_ARMv8_4_TTL 55
#define ARM64_HAS_TLB_RANGE 56
+#define ARM64_HAS_TWED 57
-#define ARM64_NCAPS 57
+#define ARM64_NCAPS 58
#endif /* __ASM_CPUCAPS_H */
diff --git a/arch/arm64/kernel/cpufeature.c b/arch/arm64/kernel/cpufeature.c
index 6424584be01e..d042d32a1144 100644
--- a/arch/arm64/kernel/cpufeature.c
+++ b/arch/arm64/kernel/cpufeature.c
@@ -2120,6 +2120,18 @@ static const struct arm64_cpu_capabilities arm64_features[] = {
.min_field_value = ID_AA64PFR1_BT_BTI,
.sign = FTR_UNSIGNED,
},
+#endif
+#ifdef CONFIG_ARM64_TWED
+ {
+ .desc = "Delayed Trapping of WFE",
+ .capability = ARM64_HAS_TWED,
+ .type = ARM64_CPUCAP_SYSTEM_FEATURE,
+ .matches = has_cpuid_feature,
+ .sys_reg = SYS_ID_AA64MMFR1_EL1,
+ .field_pos = ID_AA64MMFR1_TWED_SHIFT,
+ .sign = FTR_UNSIGNED,
+ .min_field_value = 1,
+ },
#endif
{},
};
--
2.19.1
_______________________________________________
linux-arm-kernel mailing list
linux-arm-kernel@lists.infradead.org
http://lists.infradead.org/mailman/listinfo/linux-arm-kernel
next prev parent reply other threads:[~2020-09-29 9:18 UTC|newest]
Thread overview: 33+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-09-29 9:17 [RFC PATCH 0/4] Add support for ARMv8.6 TWED feature Jingyi Wang
2020-09-29 9:17 ` Jingyi Wang
2020-09-29 9:17 ` Jingyi Wang
2020-09-29 9:17 ` Jingyi Wang [this message]
2020-09-29 9:17 ` [RFC PATCH 1/4] arm64: cpufeature: TWED support detection Jingyi Wang
2020-09-29 9:17 ` Jingyi Wang
2020-09-29 9:17 ` [RFC PATCH 2/4] KVM: arm64: Make use of TWED feature Jingyi Wang
2020-09-29 9:17 ` Jingyi Wang
2020-09-29 9:17 ` Jingyi Wang
2020-09-29 9:17 ` [RFC PATCH 3/4] KVM: arm64: Use dynamic TWE Delay value Jingyi Wang
2020-09-29 9:17 ` Jingyi Wang
2020-09-29 9:17 ` Jingyi Wang
2020-09-29 9:17 ` [RFC PATCH 4/4] KVM: arm64: Add trace for TWED update Jingyi Wang
2020-09-29 9:17 ` Jingyi Wang
2020-09-29 9:17 ` Jingyi Wang
2020-09-29 10:50 ` [RFC PATCH 0/4] Add support for ARMv8.6 TWED feature Marc Zyngier
2020-09-29 10:50 ` Marc Zyngier
2020-09-29 10:50 ` Marc Zyngier
2020-09-30 1:21 ` Jingyi Wang
2020-09-30 1:21 ` Jingyi Wang
2020-09-30 1:21 ` Jingyi Wang
2020-11-13 7:54 ` Jingyi Wang
2020-11-13 7:54 ` Jingyi Wang
2020-11-13 7:54 ` Jingyi Wang
2020-11-24 3:19 ` Jingyi Wang
2020-11-24 3:19 ` Jingyi Wang
2020-11-24 3:19 ` Jingyi Wang
2020-11-24 11:02 ` Marc Zyngier
2020-11-24 11:02 ` Marc Zyngier
2020-11-24 11:02 ` Marc Zyngier
2020-11-26 2:31 ` Jingyi Wang
2020-11-26 2:31 ` Jingyi Wang
2020-11-26 2:31 ` Jingyi Wang
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