From: Marc Zyngier <marc.zyngier@arm.com> To: Christoffer Dall <christoffer.dall@linaro.org> Cc: "Alex Bennée" <alex.bennee@linaro.org>, "Steve Capper" <Steve.Capper@linaro.org>, "Ard Biesheuvel" <ard.biesheuvel@linaro.org>, "Mark Rutland" <mark.rutland@arm.com>, "Catalin Marinas" <catalin.marinas@arm.com>, linux-arm-kernel@lists.infradead.org, kvm@vger.kernel.org, kvmarm@lists.cs.columbia.edu Subject: [PATCH v3 05/22] arm64: KVM: Implement vgic-v3 save/restore Date: Mon, 7 Dec 2015 10:53:21 +0000 [thread overview] Message-ID: <1449485618-9443-6-git-send-email-marc.zyngier@arm.com> (raw) In-Reply-To: <1449485618-9443-1-git-send-email-marc.zyngier@arm.com> Implement the vgic-v3 save restore as a direct translation of the assembly code version. Signed-off-by: Marc Zyngier <marc.zyngier@arm.com> --- arch/arm64/kvm/hyp/Makefile | 1 + arch/arm64/kvm/hyp/hyp.h | 3 + arch/arm64/kvm/hyp/vgic-v3-sr.c | 226 ++++++++++++++++++++++++++++++++++++++++ 3 files changed, 230 insertions(+) create mode 100644 arch/arm64/kvm/hyp/vgic-v3-sr.c diff --git a/arch/arm64/kvm/hyp/Makefile b/arch/arm64/kvm/hyp/Makefile index d8d5968..d1e38ce 100644 --- a/arch/arm64/kvm/hyp/Makefile +++ b/arch/arm64/kvm/hyp/Makefile @@ -3,3 +3,4 @@ # obj-$(CONFIG_KVM_ARM_HOST) += vgic-v2-sr.o +obj-$(CONFIG_KVM_ARM_HOST) += vgic-v3-sr.o diff --git a/arch/arm64/kvm/hyp/hyp.h b/arch/arm64/kvm/hyp/hyp.h index ac63553..5759f9f 100644 --- a/arch/arm64/kvm/hyp/hyp.h +++ b/arch/arm64/kvm/hyp/hyp.h @@ -32,5 +32,8 @@ void __vgic_v2_save_state(struct kvm_vcpu *vcpu); void __vgic_v2_restore_state(struct kvm_vcpu *vcpu); +void __vgic_v3_save_state(struct kvm_vcpu *vcpu); +void __vgic_v3_restore_state(struct kvm_vcpu *vcpu); + #endif /* __ARM64_KVM_HYP_H__ */ diff --git a/arch/arm64/kvm/hyp/vgic-v3-sr.c b/arch/arm64/kvm/hyp/vgic-v3-sr.c new file mode 100644 index 0000000..78d05f3 --- /dev/null +++ b/arch/arm64/kvm/hyp/vgic-v3-sr.c @@ -0,0 +1,226 @@ +/* + * Copyright (C) 2012-2015 - ARM Ltd + * Author: Marc Zyngier <marc.zyngier@arm.com> + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 as + * published by the Free Software Foundation. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program. If not, see <http://www.gnu.org/licenses/>. + */ + +#include <linux/compiler.h> +#include <linux/irqchip/arm-gic-v3.h> +#include <linux/kvm_host.h> + +#include <asm/kvm_mmu.h> + +#include "hyp.h" + +#define vtr_to_max_lr_idx(v) ((v) & 0xf) +#define vtr_to_nr_pri_bits(v) (((u32)(v) >> 29) + 1) + +#define read_gicreg(r) \ + ({ \ + u64 reg; \ + asm volatile("mrs_s %0, " __stringify(r) : "=r" (reg)); \ + reg; \ + }) + +#define write_gicreg(v,r) \ + do { \ + u64 __val = (v); \ + asm volatile("msr_s " __stringify(r) ", %0" : : "r" (__val));\ + } while (0) + +/* vcpu is already in the HYP VA space */ +void __hyp_text __vgic_v3_save_state(struct kvm_vcpu *vcpu) +{ + struct vgic_v3_cpu_if *cpu_if = &vcpu->arch.vgic_cpu.vgic_v3; + u64 val; + u32 max_lr_idx, nr_pri_bits; + + /* + * Make sure stores to the GIC via the memory mapped interface + * are now visible to the system register interface. + */ + dsb(st); + + cpu_if->vgic_vmcr = read_gicreg(ICH_VMCR_EL2); + cpu_if->vgic_misr = read_gicreg(ICH_MISR_EL2); + cpu_if->vgic_eisr = read_gicreg(ICH_EISR_EL2); + cpu_if->vgic_elrsr = read_gicreg(ICH_ELSR_EL2); + + write_gicreg(0, ICH_HCR_EL2); + val = read_gicreg(ICH_VTR_EL2); + max_lr_idx = vtr_to_max_lr_idx(val); + nr_pri_bits = vtr_to_nr_pri_bits(val); + + switch (max_lr_idx) { + case 15: + cpu_if->vgic_lr[VGIC_V3_LR_INDEX(15)] = read_gicreg(ICH_LR15_EL2); + case 14: + cpu_if->vgic_lr[VGIC_V3_LR_INDEX(14)] = read_gicreg(ICH_LR14_EL2); + case 13: + cpu_if->vgic_lr[VGIC_V3_LR_INDEX(13)] = read_gicreg(ICH_LR13_EL2); + case 12: + cpu_if->vgic_lr[VGIC_V3_LR_INDEX(12)] = read_gicreg(ICH_LR12_EL2); + case 11: + cpu_if->vgic_lr[VGIC_V3_LR_INDEX(11)] = read_gicreg(ICH_LR11_EL2); + case 10: + cpu_if->vgic_lr[VGIC_V3_LR_INDEX(10)] = read_gicreg(ICH_LR10_EL2); + case 9: + cpu_if->vgic_lr[VGIC_V3_LR_INDEX(9)] = read_gicreg(ICH_LR9_EL2); + case 8: + cpu_if->vgic_lr[VGIC_V3_LR_INDEX(8)] = read_gicreg(ICH_LR8_EL2); + case 7: + cpu_if->vgic_lr[VGIC_V3_LR_INDEX(7)] = read_gicreg(ICH_LR7_EL2); + case 6: + cpu_if->vgic_lr[VGIC_V3_LR_INDEX(6)] = read_gicreg(ICH_LR6_EL2); + case 5: + cpu_if->vgic_lr[VGIC_V3_LR_INDEX(5)] = read_gicreg(ICH_LR5_EL2); + case 4: + cpu_if->vgic_lr[VGIC_V3_LR_INDEX(4)] = read_gicreg(ICH_LR4_EL2); + case 3: + cpu_if->vgic_lr[VGIC_V3_LR_INDEX(3)] = read_gicreg(ICH_LR3_EL2); + case 2: + cpu_if->vgic_lr[VGIC_V3_LR_INDEX(2)] = read_gicreg(ICH_LR2_EL2); + case 1: + cpu_if->vgic_lr[VGIC_V3_LR_INDEX(1)] = read_gicreg(ICH_LR1_EL2); + case 0: + cpu_if->vgic_lr[VGIC_V3_LR_INDEX(0)] = read_gicreg(ICH_LR0_EL2); + } + + switch (nr_pri_bits) { + case 7: + cpu_if->vgic_ap0r[3] = read_gicreg(ICH_AP0R3_EL2); + cpu_if->vgic_ap0r[2] = read_gicreg(ICH_AP0R2_EL2); + case 6: + cpu_if->vgic_ap0r[1] = read_gicreg(ICH_AP0R1_EL2); + default: + cpu_if->vgic_ap0r[0] = read_gicreg(ICH_AP0R0_EL2); + } + + switch (nr_pri_bits) { + case 7: + cpu_if->vgic_ap1r[3] = read_gicreg(ICH_AP1R3_EL2); + cpu_if->vgic_ap1r[2] = read_gicreg(ICH_AP1R2_EL2); + case 6: + cpu_if->vgic_ap1r[1] = read_gicreg(ICH_AP1R1_EL2); + default: + cpu_if->vgic_ap1r[0] = read_gicreg(ICH_AP1R0_EL2); + } + + val = read_gicreg(ICC_SRE_EL2); + write_gicreg(val | ICC_SRE_EL2_ENABLE, ICC_SRE_EL2); + isb(); /* Make sure ENABLE is set at EL2 before setting SRE at EL1 */ + write_gicreg(1, ICC_SRE_EL1); +} + +void __hyp_text __vgic_v3_restore_state(struct kvm_vcpu *vcpu) +{ + struct vgic_v3_cpu_if *cpu_if = &vcpu->arch.vgic_cpu.vgic_v3; + u64 val; + u32 max_lr_idx, nr_pri_bits; + + /* + * VFIQEn is RES1 if ICC_SRE_EL1.SRE is 1. This causes a + * Group0 interrupt (as generated in GICv2 mode) to be + * delivered as a FIQ to the guest, with potentially fatal + * consequences. So we must make sure that ICC_SRE_EL1 has + * been actually programmed with the value we want before + * starting to mess with the rest of the GIC. + */ + write_gicreg(cpu_if->vgic_sre, ICC_SRE_EL1); + isb(); + + write_gicreg(cpu_if->vgic_hcr, ICH_HCR_EL2); + write_gicreg(cpu_if->vgic_vmcr, ICH_VMCR_EL2); + + val = read_gicreg(ICH_VTR_EL2); + max_lr_idx = vtr_to_max_lr_idx(val); + nr_pri_bits = vtr_to_nr_pri_bits(val); + + switch (nr_pri_bits) { + case 7: + write_gicreg(cpu_if->vgic_ap1r[3], ICH_AP1R3_EL2); + write_gicreg(cpu_if->vgic_ap1r[2], ICH_AP1R2_EL2); + case 6: + write_gicreg(cpu_if->vgic_ap1r[1], ICH_AP1R1_EL2); + default: + write_gicreg(cpu_if->vgic_ap1r[0], ICH_AP1R0_EL2); + } + + switch (nr_pri_bits) { + case 7: + write_gicreg(cpu_if->vgic_ap0r[3], ICH_AP0R3_EL2); + write_gicreg(cpu_if->vgic_ap0r[2], ICH_AP0R2_EL2); + case 6: + write_gicreg(cpu_if->vgic_ap0r[1], ICH_AP0R1_EL2); + default: + write_gicreg(cpu_if->vgic_ap0r[0], ICH_AP0R0_EL2); + } + + switch (max_lr_idx) { + case 15: + write_gicreg(cpu_if->vgic_lr[VGIC_V3_LR_INDEX(15)], ICH_LR15_EL2); + case 14: + write_gicreg(cpu_if->vgic_lr[VGIC_V3_LR_INDEX(14)], ICH_LR14_EL2); + case 13: + write_gicreg(cpu_if->vgic_lr[VGIC_V3_LR_INDEX(13)], ICH_LR13_EL2); + case 12: + write_gicreg(cpu_if->vgic_lr[VGIC_V3_LR_INDEX(12)], ICH_LR12_EL2); + case 11: + write_gicreg(cpu_if->vgic_lr[VGIC_V3_LR_INDEX(11)], ICH_LR11_EL2); + case 10: + write_gicreg(cpu_if->vgic_lr[VGIC_V3_LR_INDEX(10)], ICH_LR10_EL2); + case 9: + write_gicreg(cpu_if->vgic_lr[VGIC_V3_LR_INDEX(9)], ICH_LR9_EL2); + case 8: + write_gicreg(cpu_if->vgic_lr[VGIC_V3_LR_INDEX(8)], ICH_LR8_EL2); + case 7: + write_gicreg(cpu_if->vgic_lr[VGIC_V3_LR_INDEX(7)], ICH_LR7_EL2); + case 6: + write_gicreg(cpu_if->vgic_lr[VGIC_V3_LR_INDEX(6)], ICH_LR6_EL2); + case 5: + write_gicreg(cpu_if->vgic_lr[VGIC_V3_LR_INDEX(5)], ICH_LR5_EL2); + case 4: + write_gicreg(cpu_if->vgic_lr[VGIC_V3_LR_INDEX(4)], ICH_LR4_EL2); + case 3: + write_gicreg(cpu_if->vgic_lr[VGIC_V3_LR_INDEX(3)], ICH_LR3_EL2); + case 2: + write_gicreg(cpu_if->vgic_lr[VGIC_V3_LR_INDEX(2)], ICH_LR2_EL2); + case 1: + write_gicreg(cpu_if->vgic_lr[VGIC_V3_LR_INDEX(1)], ICH_LR1_EL2); + case 0: + write_gicreg(cpu_if->vgic_lr[VGIC_V3_LR_INDEX(0)], ICH_LR0_EL2); + } + + /* + * Ensures that the above will have reached the + * (re)distributors. This ensure the guest will read the + * correct values from the memory-mapped interface. + */ + isb(); + dsb(sy); + + /* + * Prevent the guest from touching the GIC system registers if + * SRE isn't enabled for GICv3 emulation. + */ + if (!cpu_if->vgic_sre) { + write_gicreg(read_gicreg(ICC_SRE_EL2) & ~ICC_SRE_EL2_ENABLE, + ICC_SRE_EL2); + } +} + +u64 __hyp_text __vgic_v3_read_ich_vtr_el2(void) +{ + return read_gicreg(ICH_VTR_EL2); +} -- 2.1.4
WARNING: multiple messages have this Message-ID (diff)
From: marc.zyngier@arm.com (Marc Zyngier) To: linux-arm-kernel@lists.infradead.org Subject: [PATCH v3 05/22] arm64: KVM: Implement vgic-v3 save/restore Date: Mon, 7 Dec 2015 10:53:21 +0000 [thread overview] Message-ID: <1449485618-9443-6-git-send-email-marc.zyngier@arm.com> (raw) In-Reply-To: <1449485618-9443-1-git-send-email-marc.zyngier@arm.com> Implement the vgic-v3 save restore as a direct translation of the assembly code version. Signed-off-by: Marc Zyngier <marc.zyngier@arm.com> --- arch/arm64/kvm/hyp/Makefile | 1 + arch/arm64/kvm/hyp/hyp.h | 3 + arch/arm64/kvm/hyp/vgic-v3-sr.c | 226 ++++++++++++++++++++++++++++++++++++++++ 3 files changed, 230 insertions(+) create mode 100644 arch/arm64/kvm/hyp/vgic-v3-sr.c diff --git a/arch/arm64/kvm/hyp/Makefile b/arch/arm64/kvm/hyp/Makefile index d8d5968..d1e38ce 100644 --- a/arch/arm64/kvm/hyp/Makefile +++ b/arch/arm64/kvm/hyp/Makefile @@ -3,3 +3,4 @@ # obj-$(CONFIG_KVM_ARM_HOST) += vgic-v2-sr.o +obj-$(CONFIG_KVM_ARM_HOST) += vgic-v3-sr.o diff --git a/arch/arm64/kvm/hyp/hyp.h b/arch/arm64/kvm/hyp/hyp.h index ac63553..5759f9f 100644 --- a/arch/arm64/kvm/hyp/hyp.h +++ b/arch/arm64/kvm/hyp/hyp.h @@ -32,5 +32,8 @@ void __vgic_v2_save_state(struct kvm_vcpu *vcpu); void __vgic_v2_restore_state(struct kvm_vcpu *vcpu); +void __vgic_v3_save_state(struct kvm_vcpu *vcpu); +void __vgic_v3_restore_state(struct kvm_vcpu *vcpu); + #endif /* __ARM64_KVM_HYP_H__ */ diff --git a/arch/arm64/kvm/hyp/vgic-v3-sr.c b/arch/arm64/kvm/hyp/vgic-v3-sr.c new file mode 100644 index 0000000..78d05f3 --- /dev/null +++ b/arch/arm64/kvm/hyp/vgic-v3-sr.c @@ -0,0 +1,226 @@ +/* + * Copyright (C) 2012-2015 - ARM Ltd + * Author: Marc Zyngier <marc.zyngier@arm.com> + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 as + * published by the Free Software Foundation. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program. If not, see <http://www.gnu.org/licenses/>. + */ + +#include <linux/compiler.h> +#include <linux/irqchip/arm-gic-v3.h> +#include <linux/kvm_host.h> + +#include <asm/kvm_mmu.h> + +#include "hyp.h" + +#define vtr_to_max_lr_idx(v) ((v) & 0xf) +#define vtr_to_nr_pri_bits(v) (((u32)(v) >> 29) + 1) + +#define read_gicreg(r) \ + ({ \ + u64 reg; \ + asm volatile("mrs_s %0, " __stringify(r) : "=r" (reg)); \ + reg; \ + }) + +#define write_gicreg(v,r) \ + do { \ + u64 __val = (v); \ + asm volatile("msr_s " __stringify(r) ", %0" : : "r" (__val));\ + } while (0) + +/* vcpu is already in the HYP VA space */ +void __hyp_text __vgic_v3_save_state(struct kvm_vcpu *vcpu) +{ + struct vgic_v3_cpu_if *cpu_if = &vcpu->arch.vgic_cpu.vgic_v3; + u64 val; + u32 max_lr_idx, nr_pri_bits; + + /* + * Make sure stores to the GIC via the memory mapped interface + * are now visible to the system register interface. + */ + dsb(st); + + cpu_if->vgic_vmcr = read_gicreg(ICH_VMCR_EL2); + cpu_if->vgic_misr = read_gicreg(ICH_MISR_EL2); + cpu_if->vgic_eisr = read_gicreg(ICH_EISR_EL2); + cpu_if->vgic_elrsr = read_gicreg(ICH_ELSR_EL2); + + write_gicreg(0, ICH_HCR_EL2); + val = read_gicreg(ICH_VTR_EL2); + max_lr_idx = vtr_to_max_lr_idx(val); + nr_pri_bits = vtr_to_nr_pri_bits(val); + + switch (max_lr_idx) { + case 15: + cpu_if->vgic_lr[VGIC_V3_LR_INDEX(15)] = read_gicreg(ICH_LR15_EL2); + case 14: + cpu_if->vgic_lr[VGIC_V3_LR_INDEX(14)] = read_gicreg(ICH_LR14_EL2); + case 13: + cpu_if->vgic_lr[VGIC_V3_LR_INDEX(13)] = read_gicreg(ICH_LR13_EL2); + case 12: + cpu_if->vgic_lr[VGIC_V3_LR_INDEX(12)] = read_gicreg(ICH_LR12_EL2); + case 11: + cpu_if->vgic_lr[VGIC_V3_LR_INDEX(11)] = read_gicreg(ICH_LR11_EL2); + case 10: + cpu_if->vgic_lr[VGIC_V3_LR_INDEX(10)] = read_gicreg(ICH_LR10_EL2); + case 9: + cpu_if->vgic_lr[VGIC_V3_LR_INDEX(9)] = read_gicreg(ICH_LR9_EL2); + case 8: + cpu_if->vgic_lr[VGIC_V3_LR_INDEX(8)] = read_gicreg(ICH_LR8_EL2); + case 7: + cpu_if->vgic_lr[VGIC_V3_LR_INDEX(7)] = read_gicreg(ICH_LR7_EL2); + case 6: + cpu_if->vgic_lr[VGIC_V3_LR_INDEX(6)] = read_gicreg(ICH_LR6_EL2); + case 5: + cpu_if->vgic_lr[VGIC_V3_LR_INDEX(5)] = read_gicreg(ICH_LR5_EL2); + case 4: + cpu_if->vgic_lr[VGIC_V3_LR_INDEX(4)] = read_gicreg(ICH_LR4_EL2); + case 3: + cpu_if->vgic_lr[VGIC_V3_LR_INDEX(3)] = read_gicreg(ICH_LR3_EL2); + case 2: + cpu_if->vgic_lr[VGIC_V3_LR_INDEX(2)] = read_gicreg(ICH_LR2_EL2); + case 1: + cpu_if->vgic_lr[VGIC_V3_LR_INDEX(1)] = read_gicreg(ICH_LR1_EL2); + case 0: + cpu_if->vgic_lr[VGIC_V3_LR_INDEX(0)] = read_gicreg(ICH_LR0_EL2); + } + + switch (nr_pri_bits) { + case 7: + cpu_if->vgic_ap0r[3] = read_gicreg(ICH_AP0R3_EL2); + cpu_if->vgic_ap0r[2] = read_gicreg(ICH_AP0R2_EL2); + case 6: + cpu_if->vgic_ap0r[1] = read_gicreg(ICH_AP0R1_EL2); + default: + cpu_if->vgic_ap0r[0] = read_gicreg(ICH_AP0R0_EL2); + } + + switch (nr_pri_bits) { + case 7: + cpu_if->vgic_ap1r[3] = read_gicreg(ICH_AP1R3_EL2); + cpu_if->vgic_ap1r[2] = read_gicreg(ICH_AP1R2_EL2); + case 6: + cpu_if->vgic_ap1r[1] = read_gicreg(ICH_AP1R1_EL2); + default: + cpu_if->vgic_ap1r[0] = read_gicreg(ICH_AP1R0_EL2); + } + + val = read_gicreg(ICC_SRE_EL2); + write_gicreg(val | ICC_SRE_EL2_ENABLE, ICC_SRE_EL2); + isb(); /* Make sure ENABLE is set at EL2 before setting SRE at EL1 */ + write_gicreg(1, ICC_SRE_EL1); +} + +void __hyp_text __vgic_v3_restore_state(struct kvm_vcpu *vcpu) +{ + struct vgic_v3_cpu_if *cpu_if = &vcpu->arch.vgic_cpu.vgic_v3; + u64 val; + u32 max_lr_idx, nr_pri_bits; + + /* + * VFIQEn is RES1 if ICC_SRE_EL1.SRE is 1. This causes a + * Group0 interrupt (as generated in GICv2 mode) to be + * delivered as a FIQ to the guest, with potentially fatal + * consequences. So we must make sure that ICC_SRE_EL1 has + * been actually programmed with the value we want before + * starting to mess with the rest of the GIC. + */ + write_gicreg(cpu_if->vgic_sre, ICC_SRE_EL1); + isb(); + + write_gicreg(cpu_if->vgic_hcr, ICH_HCR_EL2); + write_gicreg(cpu_if->vgic_vmcr, ICH_VMCR_EL2); + + val = read_gicreg(ICH_VTR_EL2); + max_lr_idx = vtr_to_max_lr_idx(val); + nr_pri_bits = vtr_to_nr_pri_bits(val); + + switch (nr_pri_bits) { + case 7: + write_gicreg(cpu_if->vgic_ap1r[3], ICH_AP1R3_EL2); + write_gicreg(cpu_if->vgic_ap1r[2], ICH_AP1R2_EL2); + case 6: + write_gicreg(cpu_if->vgic_ap1r[1], ICH_AP1R1_EL2); + default: + write_gicreg(cpu_if->vgic_ap1r[0], ICH_AP1R0_EL2); + } + + switch (nr_pri_bits) { + case 7: + write_gicreg(cpu_if->vgic_ap0r[3], ICH_AP0R3_EL2); + write_gicreg(cpu_if->vgic_ap0r[2], ICH_AP0R2_EL2); + case 6: + write_gicreg(cpu_if->vgic_ap0r[1], ICH_AP0R1_EL2); + default: + write_gicreg(cpu_if->vgic_ap0r[0], ICH_AP0R0_EL2); + } + + switch (max_lr_idx) { + case 15: + write_gicreg(cpu_if->vgic_lr[VGIC_V3_LR_INDEX(15)], ICH_LR15_EL2); + case 14: + write_gicreg(cpu_if->vgic_lr[VGIC_V3_LR_INDEX(14)], ICH_LR14_EL2); + case 13: + write_gicreg(cpu_if->vgic_lr[VGIC_V3_LR_INDEX(13)], ICH_LR13_EL2); + case 12: + write_gicreg(cpu_if->vgic_lr[VGIC_V3_LR_INDEX(12)], ICH_LR12_EL2); + case 11: + write_gicreg(cpu_if->vgic_lr[VGIC_V3_LR_INDEX(11)], ICH_LR11_EL2); + case 10: + write_gicreg(cpu_if->vgic_lr[VGIC_V3_LR_INDEX(10)], ICH_LR10_EL2); + case 9: + write_gicreg(cpu_if->vgic_lr[VGIC_V3_LR_INDEX(9)], ICH_LR9_EL2); + case 8: + write_gicreg(cpu_if->vgic_lr[VGIC_V3_LR_INDEX(8)], ICH_LR8_EL2); + case 7: + write_gicreg(cpu_if->vgic_lr[VGIC_V3_LR_INDEX(7)], ICH_LR7_EL2); + case 6: + write_gicreg(cpu_if->vgic_lr[VGIC_V3_LR_INDEX(6)], ICH_LR6_EL2); + case 5: + write_gicreg(cpu_if->vgic_lr[VGIC_V3_LR_INDEX(5)], ICH_LR5_EL2); + case 4: + write_gicreg(cpu_if->vgic_lr[VGIC_V3_LR_INDEX(4)], ICH_LR4_EL2); + case 3: + write_gicreg(cpu_if->vgic_lr[VGIC_V3_LR_INDEX(3)], ICH_LR3_EL2); + case 2: + write_gicreg(cpu_if->vgic_lr[VGIC_V3_LR_INDEX(2)], ICH_LR2_EL2); + case 1: + write_gicreg(cpu_if->vgic_lr[VGIC_V3_LR_INDEX(1)], ICH_LR1_EL2); + case 0: + write_gicreg(cpu_if->vgic_lr[VGIC_V3_LR_INDEX(0)], ICH_LR0_EL2); + } + + /* + * Ensures that the above will have reached the + * (re)distributors. This ensure the guest will read the + * correct values from the memory-mapped interface. + */ + isb(); + dsb(sy); + + /* + * Prevent the guest from touching the GIC system registers if + * SRE isn't enabled for GICv3 emulation. + */ + if (!cpu_if->vgic_sre) { + write_gicreg(read_gicreg(ICC_SRE_EL2) & ~ICC_SRE_EL2_ENABLE, + ICC_SRE_EL2); + } +} + +u64 __hyp_text __vgic_v3_read_ich_vtr_el2(void) +{ + return read_gicreg(ICH_VTR_EL2); +} -- 2.1.4
next prev parent reply other threads:[~2015-12-07 10:53 UTC|newest] Thread overview: 95+ messages / expand[flat|nested] mbox.gz Atom feed top 2015-12-07 10:53 [PATCH v3 00/22] arm64: KVM: Rewriting the world switch in C Marc Zyngier 2015-12-07 10:53 ` Marc Zyngier 2015-12-07 10:53 ` [PATCH v3 01/22] arm64: Add macros to read/write system registers Marc Zyngier 2015-12-07 10:53 ` Marc Zyngier 2015-12-07 17:35 ` Catalin Marinas 2015-12-07 17:35 ` Catalin Marinas 2015-12-07 17:45 ` Mark Rutland 2015-12-07 17:45 ` Mark Rutland 2015-12-07 17:51 ` Marc Zyngier 2015-12-07 17:51 ` Marc Zyngier 2015-12-07 10:53 ` [PATCH v3 02/22] arm64: KVM: Add a HYP-specific header file Marc Zyngier 2015-12-07 10:53 ` Marc Zyngier 2015-12-11 21:19 ` Christoffer Dall 2015-12-11 21:19 ` Christoffer Dall 2015-12-07 10:53 ` [PATCH v3 03/22] arm64: KVM: Implement vgic-v2 save/restore Marc Zyngier 2015-12-07 10:53 ` Marc Zyngier 2015-12-11 20:55 ` Christoffer Dall 2015-12-11 20:55 ` Christoffer Dall 2015-12-07 10:53 ` [PATCH v3 04/22] KVM: arm/arm64: vgic-v3: Make the LR indexing macro public Marc Zyngier 2015-12-07 10:53 ` Marc Zyngier 2015-12-11 20:57 ` Christoffer Dall 2015-12-11 20:57 ` Christoffer Dall 2015-12-07 10:53 ` Marc Zyngier [this message] 2015-12-07 10:53 ` [PATCH v3 05/22] arm64: KVM: Implement vgic-v3 save/restore Marc Zyngier 2015-12-07 16:40 ` Mario Smarduch 2015-12-07 16:40 ` Mario Smarduch 2015-12-07 16:52 ` Marc Zyngier 2015-12-07 16:52 ` Marc Zyngier 2015-12-07 17:18 ` Mario Smarduch 2015-12-07 17:18 ` Mario Smarduch 2015-12-07 17:37 ` Marc Zyngier 2015-12-07 17:37 ` Marc Zyngier 2015-12-07 18:05 ` Mario Smarduch 2015-12-07 18:05 ` Mario Smarduch 2015-12-07 18:20 ` Marc Zyngier 2015-12-07 18:20 ` Marc Zyngier 2015-12-08 2:14 ` Mario Smarduch 2015-12-08 2:14 ` Mario Smarduch 2015-12-08 8:19 ` Marc Zyngier 2015-12-08 8:19 ` Marc Zyngier 2015-12-08 8:19 ` Marc Zyngier 2015-12-11 21:04 ` Christoffer Dall 2015-12-11 21:04 ` Christoffer Dall 2015-12-07 10:53 ` [PATCH v3 06/22] arm64: KVM: Implement timer save/restore Marc Zyngier 2015-12-07 10:53 ` Marc Zyngier 2015-12-08 2:18 ` Mario Smarduch 2015-12-08 2:18 ` Mario Smarduch 2015-12-08 10:02 ` Marc Zyngier 2015-12-08 10:02 ` Marc Zyngier 2015-12-11 21:20 ` Christoffer Dall 2015-12-11 21:20 ` Christoffer Dall 2015-12-07 10:53 ` [PATCH v3 07/22] arm64: KVM: Implement system register save/restore Marc Zyngier 2015-12-07 10:53 ` Marc Zyngier 2015-12-11 3:24 ` Mario Smarduch 2015-12-11 3:24 ` Mario Smarduch 2015-12-11 18:29 ` Marc Zyngier 2015-12-11 18:29 ` Marc Zyngier 2015-12-13 4:56 ` Mario Smarduch 2015-12-13 4:56 ` Mario Smarduch 2015-12-07 10:53 ` [PATCH v3 08/22] arm64: KVM: Implement 32bit " Marc Zyngier 2015-12-07 10:53 ` Marc Zyngier 2015-12-07 10:53 ` [PATCH v3 09/22] arm64: KVM: Implement debug save/restore Marc Zyngier 2015-12-07 10:53 ` Marc Zyngier 2015-12-07 10:53 ` [PATCH v3 10/22] arm64: KVM: Implement guest entry Marc Zyngier 2015-12-07 10:53 ` Marc Zyngier 2015-12-14 11:06 ` Christoffer Dall 2015-12-14 11:06 ` Christoffer Dall 2015-12-07 10:53 ` [PATCH v3 11/22] arm64: KVM: Add patchable function selector Marc Zyngier 2015-12-07 10:53 ` Marc Zyngier 2015-12-11 21:21 ` Christoffer Dall 2015-12-11 21:21 ` Christoffer Dall 2015-12-07 10:53 ` [PATCH v3 12/22] arm64: KVM: Implement the core world switch Marc Zyngier 2015-12-07 10:53 ` Marc Zyngier 2015-12-07 10:53 ` [PATCH v3 13/22] arm64: KVM: Implement fpsimd save/restore Marc Zyngier 2015-12-07 10:53 ` Marc Zyngier 2015-12-07 10:53 ` [PATCH v3 14/22] arm64: KVM: Implement TLB handling Marc Zyngier 2015-12-07 10:53 ` Marc Zyngier 2015-12-07 10:53 ` [PATCH v3 15/22] arm64: KVM: HYP mode entry points Marc Zyngier 2015-12-07 10:53 ` Marc Zyngier 2015-12-07 10:53 ` [PATCH v3 16/22] arm64: KVM: Add panic handling Marc Zyngier 2015-12-07 10:53 ` Marc Zyngier 2015-12-07 10:53 ` [PATCH v3 17/22] arm64: KVM: Add compatibility aliases Marc Zyngier 2015-12-07 10:53 ` Marc Zyngier 2015-12-07 10:53 ` [PATCH v3 18/22] arm64: KVM: Map the kernel RO section into HYP Marc Zyngier 2015-12-07 10:53 ` Marc Zyngier 2015-12-07 10:53 ` [PATCH v3 19/22] arm64: KVM: Move away from the assembly version of the world switch Marc Zyngier 2015-12-07 10:53 ` Marc Zyngier 2015-12-07 10:53 ` [PATCH v3 20/22] arm64: KVM: Turn system register numbers to an enum Marc Zyngier 2015-12-07 10:53 ` Marc Zyngier 2015-12-07 10:53 ` [PATCH v3 21/22] arm64: KVM: Cleanup asm-offset.c Marc Zyngier 2015-12-07 10:53 ` Marc Zyngier 2015-12-07 10:53 ` [PATCH v3 22/22] arm64: KVM: Remove weak attributes Marc Zyngier 2015-12-07 10:53 ` Marc Zyngier 2015-12-14 11:07 ` Christoffer Dall 2015-12-14 11:07 ` Christoffer Dall
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