From patchwork Wed Jun 5 13:14:56 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Sudeep Holla X-Patchwork-Id: 802392 Received: from foss.arm.com (foss.arm.com [217.140.110.172]) by smtp.subspace.kernel.org (Postfix) with ESMTP id DC21419D880 for ; Wed, 5 Jun 2024 13:15:03 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=217.140.110.172 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1717593307; cv=none; b=On5Owekie4unE9OdO2gLMc7ww7scevw6IG8FPyzkI8PGVZIPvnXxq184rMvdRtxfDO6Evksg1k84e8WETH+kbCG9dkSwsSXgzsQlsHEYLYfTRaQYSjw1RT1t/ppPofy9WHHq47W+RCBSkWcvm/LGtoP0nTxW47lnTVMfMSkiKJ4= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1717593307; c=relaxed/simple; bh=OtOS56ZD7EAxz4tl7uFkwAbLTAOpYrzzQCRflPkYO2c=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=bBtnKIB+7rTfwKmnOwPdHUP3PII/wBK2I5HVft3JQYD6Us5zKHwOds5CmbSm8WkQO5KD2wXcsRRa6cIHKrCnBg7DtyK6H0KVaojxkKr/Gyk4uNHO2tgdqIwTdVF16A/OuVsT/uL4CrXX9zY0rIDjODcTt6xvqjyN1aQFVYJ6sOA= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=arm.com; spf=pass smtp.mailfrom=arm.com; arc=none smtp.client-ip=217.140.110.172 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=arm.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=arm.com Received: from usa-sjc-imap-foss1.foss.arm.com (unknown [10.121.207.14]) by usa-sjc-mx-foss1.foss.arm.com (Postfix) with ESMTP id B1679DA7; Wed, 5 Jun 2024 06:15:27 -0700 (PDT) Received: from usa.arm.com (e103737-lin.cambridge.arm.com [10.1.197.49]) by usa-sjc-imap-foss1.foss.arm.com (Postfix) with ESMTPA id 5737E3F792; Wed, 5 Jun 2024 06:15:02 -0700 (PDT) From: Sudeep Holla To: linux-acpi@vger.kernel.org, linux-arm-kernel@lists.infradead.org Cc: Sudeep Holla , Catalin Marinas , Will Deacon , Lorenzo Pieralisi , Hanjun Guo Subject: [PATCH 1/3] ACPI: arm64: Sort entries alphabetically Date: Wed, 5 Jun 2024 14:14:56 +0100 Message-ID: <20240605131458.3341095-2-sudeep.holla@arm.com> X-Mailer: git-send-email 2.45.2 In-Reply-To: <20240605131458.3341095-1-sudeep.holla@arm.com> References: <20240605131458.3341095-1-sudeep.holla@arm.com> Precedence: bulk X-Mailing-List: linux-acpi@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Sort the entries in the Makefile alphabetically. Signed-off-by: Sudeep Holla --- drivers/acpi/arm64/Makefile | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/drivers/acpi/arm64/Makefile b/drivers/acpi/arm64/Makefile index 726944648c9b..7d7fd6512bca 100644 --- a/drivers/acpi/arm64/Makefile +++ b/drivers/acpi/arm64/Makefile @@ -1,8 +1,8 @@ # SPDX-License-Identifier: GPL-2.0-only obj-$(CONFIG_ACPI_AGDI) += agdi.o -obj-$(CONFIG_ACPI_IORT) += iort.o -obj-$(CONFIG_ACPI_GTDT) += gtdt.o obj-$(CONFIG_ACPI_APMT) += apmt.o +obj-$(CONFIG_ACPI_GTDT) += gtdt.o +obj-$(CONFIG_ACPI_IORT) += iort.o obj-$(CONFIG_ARM_AMBA) += amba.o obj-y += dma.o init.o obj-y += thermal_cpufreq.o From patchwork Wed Jun 5 13:14:57 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Sudeep Holla X-Patchwork-Id: 801671 Received: from foss.arm.com (foss.arm.com [217.140.110.172]) by smtp.subspace.kernel.org (Postfix) with ESMTP id 1D0B6195398 for ; Wed, 5 Jun 2024 13:15:04 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=217.140.110.172 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1717593306; cv=none; b=hBpDJ8CxYFbqOsuWxpYz9ytWw++Un/G/kE2jB24YFOYKrHcCEyfk4PBbQ0/eMmWSrcD50L266SezjCJbJQ4J1Hoo6Wsbziw5AWdjUR3NqKl5aq7oDebrIBGTYpOmrZsXA2MezcPk5BpVGS1F66i+mN0IrgNTA1dDn8R8lhGXrQg= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1717593306; c=relaxed/simple; bh=142wZHmhE6JHoNfDIx8Ya5UC8dYp9/ml6HPYR2HM7uM=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=gQSJn++A9JZ1K/AQImiXRBoZtFwFi6WfwrxSFccTy1AIyC2fpyxZSw685rNTwAcNomwFn0pdcNIY+TxKZaWKpBZp0GLdwAJ1F4DC8q0wOU6mFdImAw2+wACDfmO36G4aqB50oLJjc5DGRhk0xjwf7ADLrgj1h0M2MfkjV81ngWA= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=arm.com; spf=pass smtp.mailfrom=arm.com; arc=none smtp.client-ip=217.140.110.172 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=arm.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=arm.com Received: from usa-sjc-imap-foss1.foss.arm.com (unknown [10.121.207.14]) by usa-sjc-mx-foss1.foss.arm.com (Postfix) with ESMTP id DDFCC1063; Wed, 5 Jun 2024 06:15:28 -0700 (PDT) Received: from usa.arm.com (e103737-lin.cambridge.arm.com [10.1.197.49]) by usa-sjc-imap-foss1.foss.arm.com (Postfix) with ESMTPA id 8D6A83F792; Wed, 5 Jun 2024 06:15:03 -0700 (PDT) From: Sudeep Holla To: linux-acpi@vger.kernel.org, linux-arm-kernel@lists.infradead.org Cc: Sudeep Holla , Catalin Marinas , Will Deacon , Lorenzo Pieralisi , Hanjun Guo Subject: [PATCH 2/3] arm64: cpuidle: Move ACPI specific code into drivers/acpi/arm64/ Date: Wed, 5 Jun 2024 14:14:57 +0100 Message-ID: <20240605131458.3341095-3-sudeep.holla@arm.com> X-Mailer: git-send-email 2.45.2 In-Reply-To: <20240605131458.3341095-1-sudeep.holla@arm.com> References: <20240605131458.3341095-1-sudeep.holla@arm.com> Precedence: bulk X-Mailing-List: linux-acpi@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 The ACPI cpuidle LPI FFH code can be moved out of arm64 arch code as it just uses SMCCC. Move all the ACPI cpuidle LPI FFH code into drivers/acpi/arm64/cpuidle.c Signed-off-by: Sudeep Holla Acked-by: Catalin Marinas --- arch/arm64/kernel/Makefile | 1 - drivers/acpi/arm64/Makefile | 1 + {arch/arm64/kernel => drivers/acpi/arm64}/cpuidle.c | 4 ---- 3 files changed, 1 insertion(+), 5 deletions(-) rename {arch/arm64/kernel => drivers/acpi/arm64}/cpuidle.c (97%) diff --git a/arch/arm64/kernel/Makefile b/arch/arm64/kernel/Makefile index 763824963ed1..2b112f3b7510 100644 --- a/arch/arm64/kernel/Makefile +++ b/arch/arm64/kernel/Makefile @@ -46,7 +46,6 @@ obj-$(CONFIG_PERF_EVENTS) += perf_regs.o perf_callchain.o obj-$(CONFIG_HARDLOCKUP_DETECTOR_PERF) += watchdog_hld.o obj-$(CONFIG_HAVE_HW_BREAKPOINT) += hw_breakpoint.o obj-$(CONFIG_CPU_PM) += sleep.o suspend.o -obj-$(CONFIG_CPU_IDLE) += cpuidle.o obj-$(CONFIG_JUMP_LABEL) += jump_label.o obj-$(CONFIG_KGDB) += kgdb.o obj-$(CONFIG_EFI) += efi.o efi-rt-wrapper.o diff --git a/drivers/acpi/arm64/Makefile b/drivers/acpi/arm64/Makefile index 7d7fd6512bca..2efee23f00b4 100644 --- a/drivers/acpi/arm64/Makefile +++ b/drivers/acpi/arm64/Makefile @@ -3,6 +3,7 @@ obj-$(CONFIG_ACPI_AGDI) += agdi.o obj-$(CONFIG_ACPI_APMT) += apmt.o obj-$(CONFIG_ACPI_GTDT) += gtdt.o obj-$(CONFIG_ACPI_IORT) += iort.o +obj-$(CONFIG_ACPI_PROCESSOR_IDLE) += cpuidle.o obj-$(CONFIG_ARM_AMBA) += amba.o obj-y += dma.o init.o obj-y += thermal_cpufreq.o diff --git a/arch/arm64/kernel/cpuidle.c b/drivers/acpi/arm64/cpuidle.c similarity index 97% rename from arch/arm64/kernel/cpuidle.c rename to drivers/acpi/arm64/cpuidle.c index f372295207fb..801f9c450142 100644 --- a/arch/arm64/kernel/cpuidle.c +++ b/drivers/acpi/arm64/cpuidle.c @@ -10,9 +10,6 @@ #include #include #include - -#ifdef CONFIG_ACPI_PROCESSOR_IDLE - #include #define ARM64_LPI_IS_RETENTION_STATE(arch_flags) (!(arch_flags)) @@ -71,4 +68,3 @@ __cpuidle int acpi_processor_ffh_lpi_enter(struct acpi_lpi_state *lpi) return CPU_PM_CPU_IDLE_ENTER_PARAM_RCU(psci_cpu_suspend_enter, lpi->index, state); } -#endif From patchwork Wed Jun 5 13:14:58 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Sudeep Holla X-Patchwork-Id: 801670 Received: from foss.arm.com (foss.arm.com [217.140.110.172]) by smtp.subspace.kernel.org (Postfix) with ESMTP id 48ED71953AA for ; Wed, 5 Jun 2024 13:15:06 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=217.140.110.172 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1717593308; cv=none; b=RvIfVPaRA+s6pYVnaB4jSa+tYTEKCFq1oh9sj8hza7TyjUyxPUqBzOJ78bNF0/pk0HAxtekRGBvlgHYvKPBrTBrpoBEcypHwxPk2ib0GTjA05G3TmwT6nkedvK64u7qO0ndLfpYD8y+oOUN/nmsLoWecviS/fJAmG9rJ7obm7+s= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1717593308; c=relaxed/simple; bh=joMoORbPGZ+FE478qXZj7EbaFTY/+D0XxUw2m5hgyu0=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=jXx71uI1SMbawniHa5L1aXu5c+Rnrnfm0NXmlAUMQL4zuib0Jq7xXRGMVK1akA5Xh/uduh/ZQX9QrLbpLyByODZA5Is3ku9IsTJOduelLlzezAGnlMxcfulThtc0q1EkPkv9ypAjpTLJikRHeTCnOrv9QbXpZQKjZKvyiJcaixI= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=arm.com; spf=pass smtp.mailfrom=arm.com; arc=none smtp.client-ip=217.140.110.172 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=arm.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=arm.com Received: from usa-sjc-imap-foss1.foss.arm.com (unknown [10.121.207.14]) by usa-sjc-mx-foss1.foss.arm.com (Postfix) with ESMTP id 16E701474; Wed, 5 Jun 2024 06:15:30 -0700 (PDT) Received: from usa.arm.com (e103737-lin.cambridge.arm.com [10.1.197.49]) by usa-sjc-imap-foss1.foss.arm.com (Postfix) with ESMTPA id BA82C3F792; Wed, 5 Jun 2024 06:15:04 -0700 (PDT) From: Sudeep Holla To: linux-acpi@vger.kernel.org, linux-arm-kernel@lists.infradead.org Cc: Sudeep Holla , Catalin Marinas , Will Deacon , Lorenzo Pieralisi , Hanjun Guo Subject: [PATCH 3/3] arm64: FFH: Move ACPI specific code into drivers/acpi/arm64/ Date: Wed, 5 Jun 2024 14:14:58 +0100 Message-ID: <20240605131458.3341095-4-sudeep.holla@arm.com> X-Mailer: git-send-email 2.45.2 In-Reply-To: <20240605131458.3341095-1-sudeep.holla@arm.com> References: <20240605131458.3341095-1-sudeep.holla@arm.com> Precedence: bulk X-Mailing-List: linux-acpi@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 The ACPI FFH Opregion code can be moved out of arm64 arch code as it just uses SMCCC. Move all the ACPI FFH Opregion code into drivers/acpi/arm64/ffh.c Signed-off-by: Sudeep Holla --- arch/arm64/kernel/acpi.c | 105 ----------------------------------- drivers/acpi/arm64/Makefile | 1 + drivers/acpi/arm64/ffh.c | 107 ++++++++++++++++++++++++++++++++++++ 3 files changed, 108 insertions(+), 105 deletions(-) create mode 100644 drivers/acpi/arm64/ffh.c diff --git a/arch/arm64/kernel/acpi.c b/arch/arm64/kernel/acpi.c index e0e7b93c16cc..fd1917336d3a 100644 --- a/arch/arm64/kernel/acpi.c +++ b/arch/arm64/kernel/acpi.c @@ -422,108 +422,3 @@ void arch_reserve_mem_area(acpi_physical_address addr, size_t size) { memblock_mark_nomap(addr, size); } - -#ifdef CONFIG_ACPI_FFH -/* - * Implements ARM64 specific callbacks to support ACPI FFH Operation Region as - * specified in https://developer.arm.com/docs/den0048/latest - */ -struct acpi_ffh_data { - struct acpi_ffh_info info; - void (*invoke_ffh_fn)(unsigned long a0, unsigned long a1, - unsigned long a2, unsigned long a3, - unsigned long a4, unsigned long a5, - unsigned long a6, unsigned long a7, - struct arm_smccc_res *args, - struct arm_smccc_quirk *res); - void (*invoke_ffh64_fn)(const struct arm_smccc_1_2_regs *args, - struct arm_smccc_1_2_regs *res); -}; - -int acpi_ffh_address_space_arch_setup(void *handler_ctxt, void **region_ctxt) -{ - enum arm_smccc_conduit conduit; - struct acpi_ffh_data *ffh_ctxt; - - if (arm_smccc_get_version() < ARM_SMCCC_VERSION_1_2) - return -EOPNOTSUPP; - - conduit = arm_smccc_1_1_get_conduit(); - if (conduit == SMCCC_CONDUIT_NONE) { - pr_err("%s: invalid SMCCC conduit\n", __func__); - return -EOPNOTSUPP; - } - - ffh_ctxt = kzalloc(sizeof(*ffh_ctxt), GFP_KERNEL); - if (!ffh_ctxt) - return -ENOMEM; - - if (conduit == SMCCC_CONDUIT_SMC) { - ffh_ctxt->invoke_ffh_fn = __arm_smccc_smc; - ffh_ctxt->invoke_ffh64_fn = arm_smccc_1_2_smc; - } else { - ffh_ctxt->invoke_ffh_fn = __arm_smccc_hvc; - ffh_ctxt->invoke_ffh64_fn = arm_smccc_1_2_hvc; - } - - memcpy(ffh_ctxt, handler_ctxt, sizeof(ffh_ctxt->info)); - - *region_ctxt = ffh_ctxt; - return AE_OK; -} - -static bool acpi_ffh_smccc_owner_allowed(u32 fid) -{ - int owner = ARM_SMCCC_OWNER_NUM(fid); - - if (owner == ARM_SMCCC_OWNER_STANDARD || - owner == ARM_SMCCC_OWNER_SIP || owner == ARM_SMCCC_OWNER_OEM) - return true; - - return false; -} - -int acpi_ffh_address_space_arch_handler(acpi_integer *value, void *region_context) -{ - int ret = 0; - struct acpi_ffh_data *ffh_ctxt = region_context; - - if (ffh_ctxt->info.offset == 0) { - /* SMC/HVC 32bit call */ - struct arm_smccc_res res; - u32 a[8] = { 0 }, *ptr = (u32 *)value; - - if (!ARM_SMCCC_IS_FAST_CALL(*ptr) || ARM_SMCCC_IS_64(*ptr) || - !acpi_ffh_smccc_owner_allowed(*ptr) || - ffh_ctxt->info.length > 32) { - ret = AE_ERROR; - } else { - int idx, len = ffh_ctxt->info.length >> 2; - - for (idx = 0; idx < len; idx++) - a[idx] = *(ptr + idx); - - ffh_ctxt->invoke_ffh_fn(a[0], a[1], a[2], a[3], a[4], - a[5], a[6], a[7], &res, NULL); - memcpy(value, &res, sizeof(res)); - } - - } else if (ffh_ctxt->info.offset == 1) { - /* SMC/HVC 64bit call */ - struct arm_smccc_1_2_regs *r = (struct arm_smccc_1_2_regs *)value; - - if (!ARM_SMCCC_IS_FAST_CALL(r->a0) || !ARM_SMCCC_IS_64(r->a0) || - !acpi_ffh_smccc_owner_allowed(r->a0) || - ffh_ctxt->info.length > sizeof(*r)) { - ret = AE_ERROR; - } else { - ffh_ctxt->invoke_ffh64_fn(r, r); - memcpy(value, r, ffh_ctxt->info.length); - } - } else { - ret = AE_ERROR; - } - - return ret; -} -#endif /* CONFIG_ACPI_FFH */ diff --git a/drivers/acpi/arm64/Makefile b/drivers/acpi/arm64/Makefile index 2efee23f00b4..05ecde9eaabe 100644 --- a/drivers/acpi/arm64/Makefile +++ b/drivers/acpi/arm64/Makefile @@ -1,6 +1,7 @@ # SPDX-License-Identifier: GPL-2.0-only obj-$(CONFIG_ACPI_AGDI) += agdi.o obj-$(CONFIG_ACPI_APMT) += apmt.o +obj-$(CONFIG_ACPI_FFH) += ffh.o obj-$(CONFIG_ACPI_GTDT) += gtdt.o obj-$(CONFIG_ACPI_IORT) += iort.o obj-$(CONFIG_ACPI_PROCESSOR_IDLE) += cpuidle.o diff --git a/drivers/acpi/arm64/ffh.c b/drivers/acpi/arm64/ffh.c new file mode 100644 index 000000000000..877edc6557e9 --- /dev/null +++ b/drivers/acpi/arm64/ffh.c @@ -0,0 +1,107 @@ +// SPDX-License-Identifier: GPL-2.0-only +#include +#include +#include + +/* + * Implements ARM64 specific callbacks to support ACPI FFH Operation Region as + * specified in https://developer.arm.com/docs/den0048/latest + */ +struct acpi_ffh_data { + struct acpi_ffh_info info; + void (*invoke_ffh_fn)(unsigned long a0, unsigned long a1, + unsigned long a2, unsigned long a3, + unsigned long a4, unsigned long a5, + unsigned long a6, unsigned long a7, + struct arm_smccc_res *args, + struct arm_smccc_quirk *res); + void (*invoke_ffh64_fn)(const struct arm_smccc_1_2_regs *args, + struct arm_smccc_1_2_regs *res); +}; + +int acpi_ffh_address_space_arch_setup(void *handler_ctxt, void **region_ctxt) +{ + enum arm_smccc_conduit conduit; + struct acpi_ffh_data *ffh_ctxt; + + if (arm_smccc_get_version() < ARM_SMCCC_VERSION_1_2) + return -EOPNOTSUPP; + + conduit = arm_smccc_1_1_get_conduit(); + if (conduit == SMCCC_CONDUIT_NONE) { + pr_err("%s: invalid SMCCC conduit\n", __func__); + return -EOPNOTSUPP; + } + + ffh_ctxt = kzalloc(sizeof(*ffh_ctxt), GFP_KERNEL); + if (!ffh_ctxt) + return -ENOMEM; + + if (conduit == SMCCC_CONDUIT_SMC) { + ffh_ctxt->invoke_ffh_fn = __arm_smccc_smc; + ffh_ctxt->invoke_ffh64_fn = arm_smccc_1_2_smc; + } else { + ffh_ctxt->invoke_ffh_fn = __arm_smccc_hvc; + ffh_ctxt->invoke_ffh64_fn = arm_smccc_1_2_hvc; + } + + memcpy(ffh_ctxt, handler_ctxt, sizeof(ffh_ctxt->info)); + + *region_ctxt = ffh_ctxt; + return AE_OK; +} + +static bool acpi_ffh_smccc_owner_allowed(u32 fid) +{ + int owner = ARM_SMCCC_OWNER_NUM(fid); + + if (owner == ARM_SMCCC_OWNER_STANDARD || + owner == ARM_SMCCC_OWNER_SIP || owner == ARM_SMCCC_OWNER_OEM) + return true; + + return false; +} + +int acpi_ffh_address_space_arch_handler(acpi_integer *value, void *region_context) +{ + int ret = 0; + struct acpi_ffh_data *ffh_ctxt = region_context; + + if (ffh_ctxt->info.offset == 0) { + /* SMC/HVC 32bit call */ + struct arm_smccc_res res; + u32 a[8] = { 0 }, *ptr = (u32 *)value; + + if (!ARM_SMCCC_IS_FAST_CALL(*ptr) || ARM_SMCCC_IS_64(*ptr) || + !acpi_ffh_smccc_owner_allowed(*ptr) || + ffh_ctxt->info.length > 32) { + ret = AE_ERROR; + } else { + int idx, len = ffh_ctxt->info.length >> 2; + + for (idx = 0; idx < len; idx++) + a[idx] = *(ptr + idx); + + ffh_ctxt->invoke_ffh_fn(a[0], a[1], a[2], a[3], a[4], + a[5], a[6], a[7], &res, NULL); + memcpy(value, &res, sizeof(res)); + } + + } else if (ffh_ctxt->info.offset == 1) { + /* SMC/HVC 64bit call */ + struct arm_smccc_1_2_regs *r = (struct arm_smccc_1_2_regs *)value; + + if (!ARM_SMCCC_IS_FAST_CALL(r->a0) || !ARM_SMCCC_IS_64(r->a0) || + !acpi_ffh_smccc_owner_allowed(r->a0) || + ffh_ctxt->info.length > sizeof(*r)) { + ret = AE_ERROR; + } else { + ffh_ctxt->invoke_ffh64_fn(r, r); + memcpy(value, r, ffh_ctxt->info.length); + } + } else { + ret = AE_ERROR; + } + + return ret; +}