diff options
Diffstat (limited to 'drivers/firmware')
| -rw-r--r-- | drivers/firmware/dmi_scan.c | 1 | ||||
| -rw-r--r-- | drivers/firmware/psci/psci.c | 2 | ||||
| -rw-r--r-- | drivers/firmware/smccc/Makefile | 2 | ||||
| -rw-r--r-- | drivers/firmware/smccc/kvm_guest.c | 50 | ||||
| -rw-r--r-- | drivers/firmware/smccc/smccc.c | 1 | ||||
| -rw-r--r-- | drivers/firmware/xilinx/zynqmp.c | 114 |
6 files changed, 169 insertions, 1 deletions
diff --git a/drivers/firmware/dmi_scan.c b/drivers/firmware/dmi_scan.c index d51ca0428bb8..f191a1f901ac 100644 --- a/drivers/firmware/dmi_scan.c +++ b/drivers/firmware/dmi_scan.c @@ -166,6 +166,7 @@ static int __init dmi_checksum(const u8 *buf, u8 len) static const char *dmi_ident[DMI_STRING_MAX]; static LIST_HEAD(dmi_devices); int dmi_available; +EXPORT_SYMBOL_GPL(dmi_available); /* * Save a DMI string diff --git a/drivers/firmware/psci/psci.c b/drivers/firmware/psci/psci.c index 64344e84bd63..f5bd0dcbbb1c 100644 --- a/drivers/firmware/psci/psci.c +++ b/drivers/firmware/psci/psci.c @@ -23,6 +23,7 @@ #include <asm/cpuidle.h> #include <asm/cputype.h> +#include <asm/hypervisor.h> #include <asm/system_misc.h> #include <asm/smp_plat.h> #include <asm/suspend.h> @@ -501,6 +502,7 @@ static int __init psci_probe(void) psci_init_cpu_suspend(); psci_init_system_suspend(); psci_init_system_reset2(); + kvm_init_hyp_services(); } return 0; diff --git a/drivers/firmware/smccc/Makefile b/drivers/firmware/smccc/Makefile index 72ab84042832..40d19144a860 100644 --- a/drivers/firmware/smccc/Makefile +++ b/drivers/firmware/smccc/Makefile @@ -1,4 +1,4 @@ # SPDX-License-Identifier: GPL-2.0 # -obj-$(CONFIG_HAVE_ARM_SMCCC_DISCOVERY) += smccc.o +obj-$(CONFIG_HAVE_ARM_SMCCC_DISCOVERY) += smccc.o kvm_guest.o obj-$(CONFIG_ARM_SMCCC_SOC_ID) += soc_id.o diff --git a/drivers/firmware/smccc/kvm_guest.c b/drivers/firmware/smccc/kvm_guest.c new file mode 100644 index 000000000000..2d3e866decaa --- /dev/null +++ b/drivers/firmware/smccc/kvm_guest.c @@ -0,0 +1,50 @@ +// SPDX-License-Identifier: GPL-2.0 + +#define pr_fmt(fmt) "smccc: KVM: " fmt + +#include <linux/arm-smccc.h> +#include <linux/bitmap.h> +#include <linux/kernel.h> +#include <linux/string.h> + +#include <asm/hypervisor.h> + +static DECLARE_BITMAP(__kvm_arm_hyp_services, ARM_SMCCC_KVM_NUM_FUNCS) __ro_after_init = { }; + +void __init kvm_init_hyp_services(void) +{ + struct arm_smccc_res res; + u32 val[4]; + + if (arm_smccc_1_1_get_conduit() != SMCCC_CONDUIT_HVC) + return; + + arm_smccc_1_1_invoke(ARM_SMCCC_VENDOR_HYP_CALL_UID_FUNC_ID, &res); + if (res.a0 != ARM_SMCCC_VENDOR_HYP_UID_KVM_REG_0 || + res.a1 != ARM_SMCCC_VENDOR_HYP_UID_KVM_REG_1 || + res.a2 != ARM_SMCCC_VENDOR_HYP_UID_KVM_REG_2 || + res.a3 != ARM_SMCCC_VENDOR_HYP_UID_KVM_REG_3) + return; + + memset(&res, 0, sizeof(res)); + arm_smccc_1_1_invoke(ARM_SMCCC_VENDOR_HYP_KVM_FEATURES_FUNC_ID, &res); + + val[0] = lower_32_bits(res.a0); + val[1] = lower_32_bits(res.a1); + val[2] = lower_32_bits(res.a2); + val[3] = lower_32_bits(res.a3); + + bitmap_from_arr32(__kvm_arm_hyp_services, val, ARM_SMCCC_KVM_NUM_FUNCS); + + pr_info("hypervisor services detected (0x%08lx 0x%08lx 0x%08lx 0x%08lx)\n", + res.a3, res.a2, res.a1, res.a0); +} + +bool kvm_arm_hyp_service_available(u32 func_id) +{ + if (func_id >= ARM_SMCCC_KVM_NUM_FUNCS) + return false; + + return test_bit(func_id, __kvm_arm_hyp_services); +} +EXPORT_SYMBOL_GPL(kvm_arm_hyp_service_available); diff --git a/drivers/firmware/smccc/smccc.c b/drivers/firmware/smccc/smccc.c index d52bfc5ed5e4..028f81d702cc 100644 --- a/drivers/firmware/smccc/smccc.c +++ b/drivers/firmware/smccc/smccc.c @@ -8,6 +8,7 @@ #include <linux/cache.h> #include <linux/init.h> #include <linux/arm-smccc.h> +#include <linux/kernel.h> #include <asm/archrandom.h> static u32 smccc_version = ARM_SMCCC_VERSION_1_0; diff --git a/drivers/firmware/xilinx/zynqmp.c b/drivers/firmware/xilinx/zynqmp.c index 83082e2f2e44..15b138326ecc 100644 --- a/drivers/firmware/xilinx/zynqmp.c +++ b/drivers/firmware/xilinx/zynqmp.c @@ -812,6 +812,120 @@ int zynqmp_pm_fpga_get_status(u32 *value) EXPORT_SYMBOL_GPL(zynqmp_pm_fpga_get_status); /** + * zynqmp_pm_pinctrl_request - Request Pin from firmware + * @pin: Pin number to request + * + * This function requests pin from firmware. + * + * Return: Returns status, either success or error+reason. + */ +int zynqmp_pm_pinctrl_request(const u32 pin) +{ + return zynqmp_pm_invoke_fn(PM_PINCTRL_REQUEST, pin, 0, 0, 0, NULL); +} +EXPORT_SYMBOL_GPL(zynqmp_pm_pinctrl_request); + +/** + * zynqmp_pm_pinctrl_release - Inform firmware that Pin control is released + * @pin: Pin number to release + * + * This function release pin from firmware. + * + * Return: Returns status, either success or error+reason. + */ +int zynqmp_pm_pinctrl_release(const u32 pin) +{ + return zynqmp_pm_invoke_fn(PM_PINCTRL_RELEASE, pin, 0, 0, 0, NULL); +} +EXPORT_SYMBOL_GPL(zynqmp_pm_pinctrl_release); + +/** + * zynqmp_pm_pinctrl_get_function - Read function id set for the given pin + * @pin: Pin number + * @id: Buffer to store function ID + * + * This function provides the function currently set for the given pin. + * + * Return: Returns status, either success or error+reason + */ +int zynqmp_pm_pinctrl_get_function(const u32 pin, u32 *id) +{ + u32 ret_payload[PAYLOAD_ARG_CNT]; + int ret; + + if (!id) + return -EINVAL; + + ret = zynqmp_pm_invoke_fn(PM_PINCTRL_GET_FUNCTION, pin, 0, + 0, 0, ret_payload); + *id = ret_payload[1]; + + return ret; +} +EXPORT_SYMBOL_GPL(zynqmp_pm_pinctrl_get_function); + +/** + * zynqmp_pm_pinctrl_set_function - Set requested function for the pin + * @pin: Pin number + * @id: Function ID to set + * + * This function sets requested function for the given pin. + * + * Return: Returns status, either success or error+reason. + */ +int zynqmp_pm_pinctrl_set_function(const u32 pin, const u32 id) +{ + return zynqmp_pm_invoke_fn(PM_PINCTRL_SET_FUNCTION, pin, id, + 0, 0, NULL); +} +EXPORT_SYMBOL_GPL(zynqmp_pm_pinctrl_set_function); + +/** + * zynqmp_pm_pinctrl_get_config - Get configuration parameter for the pin + * @pin: Pin number + * @param: Parameter to get + * @value: Buffer to store parameter value + * + * This function gets requested configuration parameter for the given pin. + * + * Return: Returns status, either success or error+reason. + */ +int zynqmp_pm_pinctrl_get_config(const u32 pin, const u32 param, + u32 *value) +{ + u32 ret_payload[PAYLOAD_ARG_CNT]; + int ret; + + if (!value) + return -EINVAL; + + ret = zynqmp_pm_invoke_fn(PM_PINCTRL_CONFIG_PARAM_GET, pin, param, + 0, 0, ret_payload); + *value = ret_payload[1]; + + return ret; +} +EXPORT_SYMBOL_GPL(zynqmp_pm_pinctrl_get_config); + +/** + * zynqmp_pm_pinctrl_set_config - Set configuration parameter for the pin + * @pin: Pin number + * @param: Parameter to set + * @value: Parameter value to set + * + * This function sets requested configuration parameter for the given pin. + * + * Return: Returns status, either success or error+reason. + */ +int zynqmp_pm_pinctrl_set_config(const u32 pin, const u32 param, + u32 value) +{ + return zynqmp_pm_invoke_fn(PM_PINCTRL_CONFIG_PARAM_SET, pin, + param, value, 0, NULL); +} +EXPORT_SYMBOL_GPL(zynqmp_pm_pinctrl_set_config); + +/** * zynqmp_pm_init_finalize() - PM call to inform firmware that the caller * master has initialized its own power management * |