From: Zhou Wang <wangzhou1@hisilicon.com> virt inclusion category: bugfix bugzilla: https://gitee.com/openeuler/kernel/issues/IC7KH5 ------------------------------------------------------------------------ This provides a mechanism for querying whether IPIV are available in this hypervisor. Add some SMCCC compatible hypercalls for PV SGI: PV_SGI_FEATURES: 0xC6000090 PV_SGI_ENABLE: 0xC6000091 ipiv_enable is a global variable, indicating whether the hardware supports IPIV. enable_ipiv_from_vmm indicates whether the VMM (such as QEMU) enables IPIV through ioctl. enable_ipiv_from_guest indicates whether the guest OS enables IPIV through the SMCCC interface. Signed-off-by: Zhou Wang <wangzhou1@hisilicon.com> Signed-off-by: Jinqian Yang <yangjinqian1@huawei.com> --- arch/arm64/kvm/hisilicon/hisi_virt.c | 18 ++++++++++++++++++ arch/arm64/kvm/hisilicon/hisi_virt.h | 7 +++++++ arch/arm64/kvm/hypercalls.c | 24 ++++++++++++++++++++++++ drivers/irqchip/irq-gic-v3-its.c | 16 +++++----------- include/linux/arm-smccc.h | 15 +++++++++++++++ include/linux/irqchip/arm-gic-v4.h | 1 + 6 files changed, 70 insertions(+), 11 deletions(-) diff --git a/arch/arm64/kvm/hisilicon/hisi_virt.c b/arch/arm64/kvm/hisilicon/hisi_virt.c index b527f2113599..54e5ecf85697 100644 --- a/arch/arm64/kvm/hisilicon/hisi_virt.c +++ b/arch/arm64/kvm/hisilicon/hisi_virt.c @@ -193,6 +193,24 @@ bool hisi_ipiv_supported(void) return true; } +extern struct static_key_false ipiv_enable; + +bool hisi_ipiv_supported_per_vm(struct kvm_vcpu *vcpu) +{ + if (!static_branch_unlikely(&ipiv_enable)) + return false; + + if (!vcpu->kvm->arch.vgic.its_vm.enable_ipiv_from_vmm) + return false; + + return true; +} + +void hisi_ipiv_enable_per_vm(struct kvm_vcpu *vcpu) +{ + vcpu->kvm->arch.vgic.its_vm.enable_ipiv_from_guest = true; +} + void ipiv_gicd_init(void) { gic_dist_enable_ipiv(); diff --git a/arch/arm64/kvm/hisilicon/hisi_virt.h b/arch/arm64/kvm/hisilicon/hisi_virt.h index 2101fc3023a8..db4c8ef347f1 100644 --- a/arch/arm64/kvm/hisilicon/hisi_virt.h +++ b/arch/arm64/kvm/hisilicon/hisi_virt.h @@ -81,6 +81,8 @@ bool hisi_ncsnp_supported(void); bool hisi_dvmbm_supported(void); #ifdef CONFIG_ARM64_HISI_IPIV bool hisi_ipiv_supported(void); +bool hisi_ipiv_supported_per_vm(struct kvm_vcpu *vcpu); +void hisi_ipiv_enable_per_vm(struct kvm_vcpu *vcpu); void ipiv_gicd_init(void); #endif /* CONFIG_ARM64_HISI_IPIV */ void kvm_get_pg_cfg(void); @@ -107,6 +109,11 @@ static inline bool hisi_ipiv_supported(void) { return false; } +static bool hisi_ipiv_supported_per_vm(struct kvm_vcpu *vcpu) +{ + return false; +} +static void hisi_ipiv_enable_per_vm(struct kvm_vcpu *vcpu) {} static inline void ipiv_gicd_init(void) {} #endif /* CONFIG_ARM64_HISI_IPIV */ static inline void kvm_get_pg_cfg(void) {} diff --git a/arch/arm64/kvm/hypercalls.c b/arch/arm64/kvm/hypercalls.c index 4c9fc5df5142..58839f9391ed 100644 --- a/arch/arm64/kvm/hypercalls.c +++ b/arch/arm64/kvm/hypercalls.c @@ -9,6 +9,10 @@ #include <kvm/arm_hypercalls.h> #include <kvm/arm_psci.h> +#ifdef CONFIG_ARM64_HISI_IPIV +#include "hisilicon/hisi_virt.h" +#endif + #define KVM_ARM_SMCCC_STD_FEATURES \ GENMASK(KVM_REG_ARM_STD_BMAP_BIT_COUNT - 1, 0) #define KVM_ARM_SMCCC_STD_HYP_FEATURES \ @@ -75,6 +79,10 @@ static bool kvm_smccc_default_allowed(u32 func_id) */ case ARM_SMCCC_VERSION_FUNC_ID: case ARM_SMCCC_ARCH_FEATURES_FUNC_ID: +#ifdef CONFIG_ARM64_HISI_IPIV + case ARM_SMCCC_VENDOR_PV_SGI_FEATURES: + case ARM_SMCCC_VENDOR_PV_SGI_ENABLE: +#endif return true; default: /* PSCI 0.2 and up is in the 0:0x1f range */ @@ -363,6 +371,22 @@ int kvm_smccc_call_handler(struct kvm_vcpu *vcpu) val[0] = SMCCC_RET_SUCCESS; break; #endif /* CONFIG_PARAVIRT_SCHED */ +#ifdef CONFIG_ARM64_HISI_IPIV + case ARM_SMCCC_VENDOR_PV_SGI_FEATURES: + if (hisi_ipiv_supported_per_vm(vcpu)) + val[0] = SMCCC_RET_SUCCESS; + else + val[0] = SMCCC_RET_NOT_SUPPORTED; + break; + case ARM_SMCCC_VENDOR_PV_SGI_ENABLE: + if (hisi_ipiv_supported_per_vm(vcpu)) { + hisi_ipiv_enable_per_vm(vcpu); + val[0] = SMCCC_RET_SUCCESS; + } else { + val[0] = SMCCC_RET_NOT_SUPPORTED; + } + break; +#endif case ARM_SMCCC_VENDOR_HYP_CALL_UID_FUNC_ID: val[0] = ARM_SMCCC_VENDOR_HYP_UID_KVM_REG_0; val[1] = ARM_SMCCC_VENDOR_HYP_UID_KVM_REG_1; diff --git a/drivers/irqchip/irq-gic-v3-its.c b/drivers/irqchip/irq-gic-v3-its.c index 21d4e990249e..81a039b25989 100644 --- a/drivers/irqchip/irq-gic-v3-its.c +++ b/drivers/irqchip/irq-gic-v3-its.c @@ -388,10 +388,6 @@ static int alloc_devid_from_rsv_pools(struct rsv_devid_pool **devid_pool, #define gic_data_rdist_rd_base() (gic_data_rdist()->rd_base) #define gic_data_rdist_vlpi_base() (gic_data_rdist_rd_base() + SZ_128K) -#ifdef CONFIG_ARM64_HISI_IPIV -extern struct static_key_false ipiv_enable; -#endif - #ifdef CONFIG_VIRT_PLAT_DEV /* * Currently we only build *one* devid pool. @@ -4610,8 +4606,7 @@ static void its_vpe_4_1_schedule(struct its_vpe *vpe, u64 ipiv_val = 0; u32 nr_vpes; - if (static_branch_unlikely(&ipiv_enable) && - vm->nassgireq) { + if (vm->nassgireq && vm->enable_ipiv_from_guest) { /* wait gicr_ipiv_busy */ WARN_ON_ONCE(readl_relaxed_poll_timeout_atomic(vlpi_base + GICR_IPIV_ST, ipiv_val, !(ipiv_val & GICR_IPIV_ST_IPIV_BUSY), 1, 500)); @@ -4681,8 +4676,7 @@ static void its_vpe_4_1_deschedule(struct its_vpe *vpe, } #ifdef CONFIG_ARM64_HISI_IPIV - if (static_branch_unlikely(&ipiv_enable) && - vm->nassgireq) { + if (vm->nassgireq && vm->enable_ipiv_from_guest) { /* wait gicr_ipiv_busy */ WARN_ON_ONCE(readl_relaxed_poll_timeout_atomic(vlpi_base + GICR_IPIV_ST, val, !(val & GICR_IPIV_ST_IPIV_BUSY), 1, 500)); @@ -5095,7 +5089,7 @@ static void its_vpe_irq_domain_free(struct irq_domain *domain, its_lpi_free(vm->db_bitmap, vm->db_lpi_base, vm->nr_db_lpis); its_free_prop_table(vm->vprop_page); #ifdef CONFIG_ARM64_HISI_IPIV - if (static_branch_unlikely(&ipiv_enable)) { + if (vm->enable_ipiv_from_vmm) { free_pages((unsigned long)page_address(vm->vpeid_page), get_order(nr_irqs * 2)); } @@ -5142,7 +5136,7 @@ static int its_vpe_irq_domain_alloc(struct irq_domain *domain, unsigned int virq if (gic_rdists->has_rvpeid) { irqchip = &its_vpe_4_1_irq_chip; #ifdef CONFIG_ARM64_HISI_IPIV - if (static_branch_unlikely(&ipiv_enable)) { + if (vm->enable_ipiv_from_vmm) { /* * The vpeid's size is 2 bytes, so we need to allocate 2 * * (num of vcpus). nr_irqs is equal to the number of vCPUs. @@ -5165,7 +5159,7 @@ static int its_vpe_irq_domain_alloc(struct irq_domain *domain, unsigned int virq if (err) break; #ifdef CONFIG_ARM64_HISI_IPIV - if (static_branch_unlikely(&ipiv_enable)) { + if (vm->enable_ipiv_from_vmm) { vpeid_entry = (u16 *)vpeid_table_va + i; *vpeid_entry = vm->vpes[i]->vpe_id; } diff --git a/include/linux/arm-smccc.h b/include/linux/arm-smccc.h index 9aba48160352..26ca4fe621c9 100644 --- a/include/linux/arm-smccc.h +++ b/include/linux/arm-smccc.h @@ -572,5 +572,20 @@ asmlinkage void __arm_smccc_hvc(unsigned long a0, unsigned long a1, 0x92) #endif /* CONFIG_PARAVIRT_SCHED */ +#ifdef CONFIG_ARM64_HISI_IPIV +/* HiSilicon paravirtualised sgi calls */ +#define ARM_SMCCC_VENDOR_PV_SGI_FEATURES \ + ARM_SMCCC_CALL_VAL(ARM_SMCCC_FAST_CALL, \ + ARM_SMCCC_SMC_64, \ + ARM_SMCCC_OWNER_VENDOR_HYP, \ + 0x90) + +#define ARM_SMCCC_VENDOR_PV_SGI_ENABLE \ + ARM_SMCCC_CALL_VAL(ARM_SMCCC_FAST_CALL, \ + ARM_SMCCC_SMC_64, \ + ARM_SMCCC_OWNER_VENDOR_HYP, \ + 0x91) +#endif /* CONFIG_ARM64_HISI_IPIV */ + #endif /*__ASSEMBLY__*/ #endif /*__LINUX_ARM_SMCCC_H*/ diff --git a/include/linux/irqchip/arm-gic-v4.h b/include/linux/irqchip/arm-gic-v4.h index 8743741e7a52..93d629db519e 100644 --- a/include/linux/irqchip/arm-gic-v4.h +++ b/include/linux/irqchip/arm-gic-v4.h @@ -38,6 +38,7 @@ struct its_vm { KABI_EXTEND(struct page *vpeid_page) KABI_EXTEND(bool nassgireq) bool enable_ipiv_from_vmm; + bool enable_ipiv_from_guest; #endif }; -- 2.33.0