From: Will Deacon <will@kernel.org>
To: Marc Zyngier <maz@kernel.org>
Cc: linux-arm-kernel@lists.infradead.org,
linux-kernel@vger.kernel.org, Mark Rutland <mark.rutland@arm.com>,
Daniel Lezcano <daniel.lezcano@linaro.org>,
Thomas Gleixner <tglx@linutronix.de>,
Peter Shier <pshier@google.com>,
Raghavendra Rao Ananta <rananta@google.com>,
Ricardo Koller <ricarkol@google.com>,
Oliver Upton <oupton@google.com>,
Catalin Marinas <catalin.marinas@arm.com>,
Linus Walleij <linus.walleij@linaro.org>,
kernel-team@android.com
Subject: Re: [PATCH v3 14/17] arm64: Add a capability for FEAT_ECV
Date: Mon, 11 Oct 2021 11:57:24 +0100 [thread overview]
Message-ID: <20211011105723.GC4009@willie-the-truck> (raw)
In-Reply-To: <20211011105629.GB4009@willie-the-truck>
On Mon, Oct 11, 2021 at 11:56:29AM +0100, Will Deacon wrote:
> On Sun, Oct 10, 2021 at 12:43:03PM +0100, Marc Zyngier wrote:
> > Add a new capability to detect the Enhanced Counter Virtualization
> > feature (FEAT_ECV).
> >
> > Reviewed-by: Oliver Upton <oupton@google.com>
> > Signed-off-by: Marc Zyngier <maz@kernel.org>
> > ---
> > arch/arm64/kernel/cpufeature.c | 10 ++++++++++
> > arch/arm64/tools/cpucaps | 1 +
> > 2 files changed, 11 insertions(+)
> >
> > diff --git a/arch/arm64/kernel/cpufeature.c b/arch/arm64/kernel/cpufeature.c
> > index f8a3067d10c6..26b11ce8fff6 100644
> > --- a/arch/arm64/kernel/cpufeature.c
> > +++ b/arch/arm64/kernel/cpufeature.c
> > @@ -1926,6 +1926,16 @@ static const struct arm64_cpu_capabilities arm64_features[] = {
> > .sign = FTR_UNSIGNED,
> > .min_field_value = 1,
> > },
> > + {
> > + .desc = "Enhanced Counter Virtualization",
> > + .capability = ARM64_HAS_ECV,
> > + .type = ARM64_CPUCAP_SYSTEM_FEATURE,
> > + .matches = has_cpuid_feature,
> > + .sys_reg = SYS_ID_AA64MMFR0_EL1,
> > + .field_pos = ID_AA64MMFR0_ECV_SHIFT,
> > + .sign = FTR_UNSIGNED,
> > + .min_field_value = 1,
> > + },
> > #ifdef CONFIG_ARM64_PAN
> > {
> > .desc = "Privileged Access Never",
> > diff --git a/arch/arm64/tools/cpucaps b/arch/arm64/tools/cpucaps
> > index 49305c2e6dfd..7a7c58acd8f0 100644
> > --- a/arch/arm64/tools/cpucaps
> > +++ b/arch/arm64/tools/cpucaps
> > @@ -18,6 +18,7 @@ HAS_CRC32
> > HAS_DCPODP
> > HAS_DCPOP
> > HAS_E0PD
> > +HAS_ECV
> > HAS_EPAN
> > HAS_GENERIC_AUTH
> > HAS_GENERIC_AUTH_ARCH
>
> We should also make the ECV field FTR_VISIBLE.
... like you do in the last patch!
So:
Acked-by: Will Deacon <will@kernel.org>
for this one.
Will
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next prev parent reply other threads:[~2021-10-11 10:59 UTC|newest]
Thread overview: 32+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-10-10 11:42 [PATCH v3 00/17] clocksource/arm_arch_timer: Add basic ARMv8.6 support Marc Zyngier
2021-10-10 11:42 ` [PATCH v3 01/17] clocksource/arm_arch_timer: Add build-time guards for unhandled register accesses Marc Zyngier
2021-10-10 11:42 ` [PATCH v3 02/17] clocksource/arm_arch_timer: Drop CNT*_TVAL read accessors Marc Zyngier
2021-10-10 11:42 ` [PATCH v3 03/17] clocksource/arm_arch_timer: Extend write side of timer register accessors to u64 Marc Zyngier
2021-10-10 11:42 ` [PATCH v3 04/17] clocksource/arm_arch_timer: Move system register timer programming over to CVAL Marc Zyngier
2021-10-10 11:42 ` [PATCH v3 05/17] clocksource/arm_arch_timer: Move drop _tval from erratum function names Marc Zyngier
2021-10-10 11:42 ` [PATCH v3 06/17] clocksource/arm_arch_timer: Fix MMIO base address vs callback ordering issue Marc Zyngier
2021-10-10 11:42 ` [PATCH v3 07/17] clocksource/arm_arch_timer: Move MMIO timer programming over to CVAL Marc Zyngier
2021-10-10 11:42 ` [PATCH v3 08/17] clocksource/arm_arch_timer: Advertise 56bit timer to the core code Marc Zyngier
2021-10-10 11:42 ` [PATCH v3 09/17] clocksource/arm_arch_timer: Work around broken CVAL implementations Marc Zyngier
2021-10-10 11:42 ` [PATCH v3 10/17] clocksource/arm_arch_timer: Remove any trace of the TVAL programming interface Marc Zyngier
2021-10-10 11:43 ` [PATCH v3 11/17] clocksource/arm_arch_timer: Drop unnecessary ISB on CVAL programming Marc Zyngier
2021-10-10 11:43 ` [PATCH v3 12/17] clocksource/arm_arch_timer: Fix masking for high freq counters Marc Zyngier
2021-10-10 11:43 ` [PATCH v3 13/17] clocksource/arch_arm_timer: Move workaround synchronisation around Marc Zyngier
2021-10-10 11:43 ` [PATCH v3 14/17] arm64: Add a capability for FEAT_ECV Marc Zyngier
2021-10-11 10:56 ` Will Deacon
2021-10-11 10:57 ` Will Deacon [this message]
2021-10-10 11:43 ` [PATCH v3 15/17] arm64: Add CNT{P, V}CTSS_EL0 alternatives to cnt{p, v}ct_el0 Marc Zyngier
2021-10-11 10:33 ` [PATCH v3 15/17] arm64: Add CNT{P,V}CTSS_EL0 alternatives to cnt{p,v}ct_el0 Will Deacon
2021-10-10 11:43 ` [PATCH v3 16/17] arm64: Add handling of CNTVCTSS traps Marc Zyngier
2021-10-11 10:54 ` Will Deacon
2021-10-10 11:43 ` [PATCH v3 17/17] arm64: Add HWCAP for self-synchronising virtual counter Marc Zyngier
2021-10-11 11:00 ` Will Deacon
2021-10-11 11:02 ` [PATCH v3 00/17] clocksource/arm_arch_timer: Add basic ARMv8.6 support Will Deacon
2021-10-11 13:39 ` Marc Zyngier
2021-10-16 21:59 ` Daniel Lezcano
2021-10-17 9:57 ` Marc Zyngier
2021-10-18 7:51 ` Daniel Lezcano
2021-10-19 8:00 ` Marc Zyngier
2021-10-19 8:04 ` Daniel Lezcano
2021-10-19 11:09 ` Will Deacon
2021-10-19 11:10 ` Daniel Lezcano
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