From: Marc Zyngier <maz@kernel.org> To: kvmarm@lists.linux.dev, kvm@vger.kernel.org, linux-arm-kernel@lists.infradead.org Cc: James Morse <james.morse@arm.com>, Suzuki K Poulose <suzuki.poulose@arm.com>, Oliver Upton <oliver.upton@linux.dev>, Zenghui Yu <yuzenghui@huawei.com>, Ricardo Koller <ricarkol@google.com>, Simon Veith <sveith@amazon.de>, Reiji Watanabe <reijiw@google.com>, Colton Lewis <coltonlewis@google.com>, Joey Gouly <joey.gouly@arm.com>, dwmw2@infradead.org Subject: [PATCH v2 04/19] arm64: Add HAS_ECV_CNTPOFF capability Date: Mon, 13 Mar 2023 12:48:22 +0000 [thread overview] Message-ID: <20230313124837.2264882-5-maz@kernel.org> (raw) In-Reply-To: <20230313124837.2264882-1-maz@kernel.org> Add the probing code for the FEAT_ECV variant that implements CNTPOFF_EL2. Why it is optional is a mystery, but let's try and detect it. Reviewed-by: Reiji Watanabe <reijiw@google.com> Signed-off-by: Marc Zyngier <maz@kernel.org> --- arch/arm64/kernel/cpufeature.c | 11 +++++++++++ arch/arm64/tools/cpucaps | 1 + 2 files changed, 12 insertions(+) diff --git a/arch/arm64/kernel/cpufeature.c b/arch/arm64/kernel/cpufeature.c index 2e3e55139777..c331c49a7d19 100644 --- a/arch/arm64/kernel/cpufeature.c +++ b/arch/arm64/kernel/cpufeature.c @@ -2223,6 +2223,17 @@ static const struct arm64_cpu_capabilities arm64_features[] = { .sign = FTR_UNSIGNED, .min_field_value = 1, }, + { + .desc = "Enhanced Counter Virtualization (CNTPOFF)", + .capability = ARM64_HAS_ECV_CNTPOFF, + .type = ARM64_CPUCAP_SYSTEM_FEATURE, + .matches = has_cpuid_feature, + .sys_reg = SYS_ID_AA64MMFR0_EL1, + .field_pos = ID_AA64MMFR0_EL1_ECV_SHIFT, + .field_width = 4, + .sign = FTR_UNSIGNED, + .min_field_value = ID_AA64MMFR0_EL1_ECV_CNTPOFF, + }, #ifdef CONFIG_ARM64_PAN { .desc = "Privileged Access Never", diff --git a/arch/arm64/tools/cpucaps b/arch/arm64/tools/cpucaps index 37b1340e9646..40ba95472594 100644 --- a/arch/arm64/tools/cpucaps +++ b/arch/arm64/tools/cpucaps @@ -23,6 +23,7 @@ HAS_DCPOP HAS_DIT HAS_E0PD HAS_ECV +HAS_ECV_CNTPOFF HAS_EPAN HAS_GENERIC_AUTH HAS_GENERIC_AUTH_ARCH_QARMA3 -- 2.34.1
WARNING: multiple messages have this Message-ID (diff)
From: Marc Zyngier <maz@kernel.org> To: kvmarm@lists.linux.dev, kvm@vger.kernel.org, linux-arm-kernel@lists.infradead.org Cc: James Morse <james.morse@arm.com>, Suzuki K Poulose <suzuki.poulose@arm.com>, Oliver Upton <oliver.upton@linux.dev>, Zenghui Yu <yuzenghui@huawei.com>, Ricardo Koller <ricarkol@google.com>, Simon Veith <sveith@amazon.de>, Reiji Watanabe <reijiw@google.com>, Colton Lewis <coltonlewis@google.com>, Joey Gouly <joey.gouly@arm.com>, dwmw2@infradead.org Subject: [PATCH v2 04/19] arm64: Add HAS_ECV_CNTPOFF capability Date: Mon, 13 Mar 2023 12:48:22 +0000 [thread overview] Message-ID: <20230313124837.2264882-5-maz@kernel.org> (raw) In-Reply-To: <20230313124837.2264882-1-maz@kernel.org> Add the probing code for the FEAT_ECV variant that implements CNTPOFF_EL2. Why it is optional is a mystery, but let's try and detect it. Reviewed-by: Reiji Watanabe <reijiw@google.com> Signed-off-by: Marc Zyngier <maz@kernel.org> --- arch/arm64/kernel/cpufeature.c | 11 +++++++++++ arch/arm64/tools/cpucaps | 1 + 2 files changed, 12 insertions(+) diff --git a/arch/arm64/kernel/cpufeature.c b/arch/arm64/kernel/cpufeature.c index 2e3e55139777..c331c49a7d19 100644 --- a/arch/arm64/kernel/cpufeature.c +++ b/arch/arm64/kernel/cpufeature.c @@ -2223,6 +2223,17 @@ static const struct arm64_cpu_capabilities arm64_features[] = { .sign = FTR_UNSIGNED, .min_field_value = 1, }, + { + .desc = "Enhanced Counter Virtualization (CNTPOFF)", + .capability = ARM64_HAS_ECV_CNTPOFF, + .type = ARM64_CPUCAP_SYSTEM_FEATURE, + .matches = has_cpuid_feature, + .sys_reg = SYS_ID_AA64MMFR0_EL1, + .field_pos = ID_AA64MMFR0_EL1_ECV_SHIFT, + .field_width = 4, + .sign = FTR_UNSIGNED, + .min_field_value = ID_AA64MMFR0_EL1_ECV_CNTPOFF, + }, #ifdef CONFIG_ARM64_PAN { .desc = "Privileged Access Never", diff --git a/arch/arm64/tools/cpucaps b/arch/arm64/tools/cpucaps index 37b1340e9646..40ba95472594 100644 --- a/arch/arm64/tools/cpucaps +++ b/arch/arm64/tools/cpucaps @@ -23,6 +23,7 @@ HAS_DCPOP HAS_DIT HAS_E0PD HAS_ECV +HAS_ECV_CNTPOFF HAS_EPAN HAS_GENERIC_AUTH HAS_GENERIC_AUTH_ARCH_QARMA3 -- 2.34.1 _______________________________________________ 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:[~2023-03-13 12:49 UTC|newest] Thread overview: 46+ messages / expand[flat|nested] mbox.gz Atom feed top 2023-03-13 12:48 [PATCH v2 00/19] KVM: arm64: Rework timer offsetting for fun and profit Marc Zyngier 2023-03-13 12:48 ` Marc Zyngier 2023-03-13 12:48 ` [PATCH v2 01/19] KVM: arm64: timers: Convert per-vcpu virtual offset to a global value Marc Zyngier 2023-03-13 12:48 ` Marc Zyngier 2023-03-13 12:48 ` [PATCH v2 02/19] KVM: arm64: timers: Use a per-vcpu, per-timer accumulator for fractional ns Marc Zyngier 2023-03-13 12:48 ` Marc Zyngier 2023-03-13 12:48 ` [PATCH v2 03/19] arm64: Add CNTPOFF_EL2 register definition Marc Zyngier 2023-03-13 12:48 ` Marc Zyngier 2023-03-13 12:48 ` Marc Zyngier [this message] 2023-03-13 12:48 ` [PATCH v2 04/19] arm64: Add HAS_ECV_CNTPOFF capability Marc Zyngier 2023-03-13 12:48 ` [PATCH v2 05/19] KVM: arm64: timers: Use CNTPOFF_EL2 to offset the physical timer Marc Zyngier 2023-03-13 12:48 ` Marc Zyngier 2023-03-13 12:48 ` [PATCH v2 06/19] KVM: arm64: timers: Allow physical offset without CNTPOFF_EL2 Marc Zyngier 2023-03-13 12:48 ` Marc Zyngier 2023-03-13 16:43 ` Marc Zyngier 2023-03-13 16:43 ` Marc Zyngier 2023-03-13 12:48 ` [PATCH v2 07/19] KVM: arm64: Expose {un,}lock_all_vcpus() to the reset of KVM Marc Zyngier 2023-03-13 12:48 ` Marc Zyngier 2023-03-13 12:48 ` [PATCH v2 08/19] KVM: arm64: timers: Allow userspace to set the global counter offset Marc Zyngier 2023-03-13 12:48 ` Marc Zyngier 2023-03-13 12:48 ` [PATCH v2 09/19] KVM: arm64: timers: Allow save/restoring of the physical timer Marc Zyngier 2023-03-13 12:48 ` Marc Zyngier 2023-03-13 12:48 ` [PATCH v2 10/19] KVM: arm64: timers: Rationalise per-vcpu timer init Marc Zyngier 2023-03-13 12:48 ` Marc Zyngier 2023-03-13 12:48 ` [PATCH v2 11/19] KVM: arm64: timers: Abstract per-timer IRQ access Marc Zyngier 2023-03-13 12:48 ` Marc Zyngier 2023-03-13 12:48 ` [PATCH v2 12/19] KVM: arm64: timers: Move the timer IRQs into arch_timer_vm_data Marc Zyngier 2023-03-13 12:48 ` Marc Zyngier 2023-03-13 12:48 ` [PATCH v2 13/19] KVM: arm64: Abstract the number of valid timers per vcpu Marc Zyngier 2023-03-13 12:48 ` Marc Zyngier 2023-03-13 12:48 ` [PATCH v2 14/19] KVM: arm64: Document KVM_ARM_SET_CNT_OFFSETS and co Marc Zyngier 2023-03-13 12:48 ` Marc Zyngier 2023-03-13 12:48 ` [PATCH v2 15/19] KVM: arm64: nv: timers: Add a per-timer, per-vcpu offset Marc Zyngier 2023-03-13 12:48 ` Marc Zyngier 2023-03-13 12:48 ` [PATCH v2 16/19] KVM: arm64: nv: timers: Support hyp timer emulation Marc Zyngier 2023-03-13 12:48 ` Marc Zyngier 2023-03-13 12:48 ` [PATCH v2 17/19] KVM: arm64: selftests: Add physical timer registers to the sysreg list Marc Zyngier 2023-03-13 12:48 ` Marc Zyngier 2023-03-13 12:48 ` [PATCH v2 18/19] KVM: arm64: selftests: Augment existing timer test to handle variable offset Marc Zyngier 2023-03-13 12:48 ` Marc Zyngier 2023-03-13 12:48 ` [PATCH v2 19/19] KVM: arm64: selftests: Deal with spurious timer interrupts Marc Zyngier 2023-03-13 12:48 ` Marc Zyngier 2023-03-23 22:19 ` [PATCH v2 00/19] KVM: arm64: Rework timer offsetting for fun and profit Colton Lewis 2023-03-23 22:19 ` Colton Lewis 2023-03-23 22:54 ` Marc Zyngier 2023-03-23 22:54 ` Marc Zyngier
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