linux-kernel - Re: [PATCH v6 1/6] firmware/psci: Add definitions for PSCI v1.3 specification

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Message-ID: <AA34E63F-98CD-4A63-B92F-47ACB12417B1@oracle.com>
Date: Wed, 23 Oct 2024 15:31:10 +0000
From: Miguel Luis <miguel.luis@...cle.com>
To: David Woodhouse <dwmw2@...radead.org>
CC: Paolo Bonzini <pbonzini@...hat.com>, Jonathan Corbet <corbet@....net>,
        Marc Zyngier <maz@...nel.org>, Oliver Upton <oliver.upton@...ux.dev>,
        James
 Morse <james.morse@....com>,
        Suzuki K Poulose <suzuki.poulose@....com>,
        Zenghui Yu <yuzenghui@...wei.com>,
        Catalin Marinas <catalin.marinas@....com>,
        Will Deacon <will@...nel.org>, Mark Rutland <mark.rutland@....com>,
        Lorenzo
 Pieralisi <lpieralisi@...nel.org>,
        "Rafael J. Wysocki" <rafael@...nel.org>, Pavel Machek <pavel@....cz>,
        Len Brown <len.brown@...el.com>, Shuah Khan
	<shuah@...nel.org>,
        David Woodhouse <dwmw@...zon.co.uk>,
        "kvm@...r.kernel.org" <kvm@...r.kernel.org>,
        "linux-doc@...r.kernel.org"
	<linux-doc@...r.kernel.org>,
        "linux-kernel@...r.kernel.org"
	<linux-kernel@...r.kernel.org>,
        "linux-arm-kernel@...ts.infradead.org"
	<linux-arm-kernel@...ts.infradead.org>,
        "kvmarm@...ts.linux.dev"
	<kvmarm@...ts.linux.dev>,
        "linux-pm@...r.kernel.org"
	<linux-pm@...r.kernel.org>,
        "linux-kselftest@...r.kernel.org"
	<linux-kselftest@...r.kernel.org>,
        Francesco Lavra
	<francescolavra.fl@...il.com>
Subject: Re: [PATCH v6 1/6] firmware/psci: Add definitions for PSCI v1.3
 specification



> On 19 Oct 2024, at 17:15, David Woodhouse <dwmw2@...radead.org> wrote:
> 
> From: David Woodhouse <dwmw@...zon.co.uk>
> 
> The v1.3 PSCI spec (https://developer.arm.com/documentation/den0022) adds
> the SYSTEM_OFF2 function. Add definitions for it and its hibernation type
> parameter.
> 
> Signed-off-by: David Woodhouse <dwmw@...zon.co.uk>
> ---
> include/uapi/linux/psci.h | 5 +++++
> 1 file changed, 5 insertions(+)
> 
> diff --git a/include/uapi/linux/psci.h b/include/uapi/linux/psci.h
> index 42a40ad3fb62..81759ff385e6 100644
> --- a/include/uapi/linux/psci.h
> +++ b/include/uapi/linux/psci.h
> @@ -59,6 +59,7 @@
> #define PSCI_1_1_FN_SYSTEM_RESET2 PSCI_0_2_FN(18)
> #define PSCI_1_1_FN_MEM_PROTECT PSCI_0_2_FN(19)
> #define PSCI_1_1_FN_MEM_PROTECT_CHECK_RANGE PSCI_0_2_FN(20)
> +#define PSCI_1_3_FN_SYSTEM_OFF2 PSCI_0_2_FN(21)
> 
> #define PSCI_1_0_FN64_CPU_DEFAULT_SUSPEND PSCI_0_2_FN64(12)
> #define PSCI_1_0_FN64_NODE_HW_STATE PSCI_0_2_FN64(13)
> @@ -68,6 +69,7 @@
> 
> #define PSCI_1_1_FN64_SYSTEM_RESET2 PSCI_0_2_FN64(18)
> #define PSCI_1_1_FN64_MEM_PROTECT_CHECK_RANGE PSCI_0_2_FN64(20)
> +#define PSCI_1_3_FN64_SYSTEM_OFF2 PSCI_0_2_FN64(21)
> 
> /* PSCI v0.2 power state encoding for CPU_SUSPEND function */
> #define PSCI_0_2_POWER_STATE_ID_MASK 0xffff
> @@ -100,6 +102,9 @@
> #define PSCI_1_1_RESET_TYPE_SYSTEM_WARM_RESET 0
> #define PSCI_1_1_RESET_TYPE_VENDOR_START 0x80000000U
> 
> +/* PSCI v1.3 hibernate type for SYSTEM_OFF2 */
> +#define PSCI_1_3_OFF_TYPE_HIBERNATE_OFF BIT(0)
> +

Reviewed-by: Miguel Luis <miguel.luis@...cle.com>

> /* PSCI version decoding (independent of PSCI version) */
> #define PSCI_VERSION_MAJOR_SHIFT 16
> #define PSCI_VERSION_MINOR_MASK \
> -- 
> 2.44.0
>