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author | Vladimir Murzin <vladimir.murzin@arm.com> | 2016-09-12 15:49:17 +0100 |
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committer | Christoffer Dall <christoffer.dall@linaro.org> | 2016-09-22 13:21:46 +0200 |
commit | 19f0ece4395470b24826fc090de2795ecc9cf4a0 (patch) | |
tree | ec62fc662e145c0d904757d61c6b9ca139b94da3 /arch/arm64/kvm | |
parent | b5525ce898eb5cbbd0359d745e23a5516377fa64 (diff) | |
download | linux-stable-19f0ece4395470b24826fc090de2795ecc9cf4a0.tar.gz linux-stable-19f0ece4395470b24826fc090de2795ecc9cf4a0.tar.bz2 linux-stable-19f0ece4395470b24826fc090de2795ecc9cf4a0.zip |
arm64: KVM: Move vgic-v3 save/restore to virt/kvm/arm/hyp
So we can reuse the code under arch/arm
Signed-off-by: Vladimir Murzin <vladimir.murzin@arm.com>
Acked-by: Marc Zyngier <marc.zyngier@arm.com>
Signed-off-by: Christoffer Dall <christoffer.dall@linaro.org>
Diffstat (limited to 'arch/arm64/kvm')
-rw-r--r-- | arch/arm64/kvm/hyp/Makefile | 2 | ||||
-rw-r--r-- | arch/arm64/kvm/hyp/vgic-v3-sr.c | 328 |
2 files changed, 1 insertions, 329 deletions
diff --git a/arch/arm64/kvm/hyp/Makefile b/arch/arm64/kvm/hyp/Makefile index 0c85febcc1eb..aaf42ae8d8c3 100644 --- a/arch/arm64/kvm/hyp/Makefile +++ b/arch/arm64/kvm/hyp/Makefile @@ -5,9 +5,9 @@ KVM=../../../../virt/kvm obj-$(CONFIG_KVM_ARM_HOST) += $(KVM)/arm/hyp/vgic-v2-sr.o +obj-$(CONFIG_KVM_ARM_HOST) += $(KVM)/arm/hyp/vgic-v3-sr.o obj-$(CONFIG_KVM_ARM_HOST) += $(KVM)/arm/hyp/timer-sr.o -obj-$(CONFIG_KVM_ARM_HOST) += vgic-v3-sr.o obj-$(CONFIG_KVM_ARM_HOST) += sysreg-sr.o obj-$(CONFIG_KVM_ARM_HOST) += debug-sr.o obj-$(CONFIG_KVM_ARM_HOST) += entry.o diff --git a/arch/arm64/kvm/hyp/vgic-v3-sr.c b/arch/arm64/kvm/hyp/vgic-v3-sr.c deleted file mode 100644 index 3947095cc0a1..000000000000 --- a/arch/arm64/kvm/hyp/vgic-v3-sr.c +++ /dev/null @@ -1,328 +0,0 @@ -/* - * 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_hyp.h> - -#define vtr_to_max_lr_idx(v) ((v) & 0xf) -#define vtr_to_nr_pri_bits(v) (((u32)(v) >> 29) + 1) - -static u64 __hyp_text __gic_v3_get_lr(unsigned int lr) -{ - switch (lr & 0xf) { - case 0: - return read_gicreg(ICH_LR0_EL2); - case 1: - return read_gicreg(ICH_LR1_EL2); - case 2: - return read_gicreg(ICH_LR2_EL2); - case 3: - return read_gicreg(ICH_LR3_EL2); - case 4: - return read_gicreg(ICH_LR4_EL2); - case 5: - return read_gicreg(ICH_LR5_EL2); - case 6: - return read_gicreg(ICH_LR6_EL2); - case 7: - return read_gicreg(ICH_LR7_EL2); - case 8: - return read_gicreg(ICH_LR8_EL2); - case 9: - return read_gicreg(ICH_LR9_EL2); - case 10: - return read_gicreg(ICH_LR10_EL2); - case 11: - return read_gicreg(ICH_LR11_EL2); - case 12: - return read_gicreg(ICH_LR12_EL2); - case 13: - return read_gicreg(ICH_LR13_EL2); - case 14: - return read_gicreg(ICH_LR14_EL2); - case 15: - return read_gicreg(ICH_LR15_EL2); - } - - unreachable(); -} - -static void __hyp_text __gic_v3_set_lr(u64 val, int lr) -{ - switch (lr & 0xf) { - case 0: - write_gicreg(val, ICH_LR0_EL2); - break; - case 1: - write_gicreg(val, ICH_LR1_EL2); - break; - case 2: - write_gicreg(val, ICH_LR2_EL2); - break; - case 3: - write_gicreg(val, ICH_LR3_EL2); - break; - case 4: - write_gicreg(val, ICH_LR4_EL2); - break; - case 5: - write_gicreg(val, ICH_LR5_EL2); - break; - case 6: - write_gicreg(val, ICH_LR6_EL2); - break; - case 7: - write_gicreg(val, ICH_LR7_EL2); - break; - case 8: - write_gicreg(val, ICH_LR8_EL2); - break; - case 9: - write_gicreg(val, ICH_LR9_EL2); - break; - case 10: - write_gicreg(val, ICH_LR10_EL2); - break; - case 11: - write_gicreg(val, ICH_LR11_EL2); - break; - case 12: - write_gicreg(val, ICH_LR12_EL2); - break; - case 13: - write_gicreg(val, ICH_LR13_EL2); - break; - case 14: - write_gicreg(val, ICH_LR14_EL2); - break; - case 15: - write_gicreg(val, ICH_LR15_EL2); - break; - } -} - -static void __hyp_text save_maint_int_state(struct kvm_vcpu *vcpu, int nr_lr) -{ - struct vgic_v3_cpu_if *cpu_if = &vcpu->arch.vgic_cpu.vgic_v3; - int i; - bool expect_mi; - - expect_mi = !!(cpu_if->vgic_hcr & ICH_HCR_UIE); - - for (i = 0; i < nr_lr; i++) { - if (!(vcpu->arch.vgic_cpu.live_lrs & (1UL << i))) - continue; - - expect_mi |= (!(cpu_if->vgic_lr[i] & ICH_LR_HW) && - (cpu_if->vgic_lr[i] & ICH_LR_EOI)); - } - - if (expect_mi) { - cpu_if->vgic_misr = read_gicreg(ICH_MISR_EL2); - - if (cpu_if->vgic_misr & ICH_MISR_EOI) - cpu_if->vgic_eisr = read_gicreg(ICH_EISR_EL2); - else - cpu_if->vgic_eisr = 0; - } else { - cpu_if->vgic_misr = 0; - cpu_if->vgic_eisr = 0; - } -} - -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; - - /* - * Make sure stores to the GIC via the memory mapped interface - * are now visible to the system register interface. - */ - if (!cpu_if->vgic_sre) - dsb(st); - - cpu_if->vgic_vmcr = read_gicreg(ICH_VMCR_EL2); - - if (vcpu->arch.vgic_cpu.live_lrs) { - int i; - u32 max_lr_idx, nr_pri_bits; - - 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); - - save_maint_int_state(vcpu, max_lr_idx + 1); - - for (i = 0; i <= max_lr_idx; i++) { - if (!(vcpu->arch.vgic_cpu.live_lrs & (1UL << i))) - continue; - - if (cpu_if->vgic_elrsr & (1 << i)) - cpu_if->vgic_lr[i] &= ~ICH_LR_STATE; - else - cpu_if->vgic_lr[i] = __gic_v3_get_lr(i); - - __gic_v3_set_lr(0, i); - } - - 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); - } - - vcpu->arch.vgic_cpu.live_lrs = 0; - } else { - cpu_if->vgic_misr = 0; - cpu_if->vgic_eisr = 0; - cpu_if->vgic_elrsr = 0xffff; - cpu_if->vgic_ap0r[0] = 0; - cpu_if->vgic_ap0r[1] = 0; - cpu_if->vgic_ap0r[2] = 0; - cpu_if->vgic_ap0r[3] = 0; - cpu_if->vgic_ap1r[0] = 0; - cpu_if->vgic_ap1r[1] = 0; - cpu_if->vgic_ap1r[2] = 0; - cpu_if->vgic_ap1r[3] = 0; - } - - val = read_gicreg(ICC_SRE_EL2); - write_gicreg(val | ICC_SRE_EL2_ENABLE, ICC_SRE_EL2); - - if (!cpu_if->vgic_sre) { - /* Make sure ENABLE is set at EL2 before setting SRE at EL1 */ - isb(); - 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; - u16 live_lrs = 0; - int i; - - /* - * 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. - */ - if (!cpu_if->vgic_sre) { - write_gicreg(0, ICC_SRE_EL1); - isb(); - } - - val = read_gicreg(ICH_VTR_EL2); - max_lr_idx = vtr_to_max_lr_idx(val); - nr_pri_bits = vtr_to_nr_pri_bits(val); - - for (i = 0; i <= max_lr_idx; i++) { - if (cpu_if->vgic_lr[i] & ICH_LR_STATE) - live_lrs |= (1 << i); - } - - write_gicreg(cpu_if->vgic_vmcr, ICH_VMCR_EL2); - - if (live_lrs) { - write_gicreg(cpu_if->vgic_hcr, ICH_HCR_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 (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); - } - - for (i = 0; i <= max_lr_idx; i++) { - if (!(live_lrs & (1 << i))) - continue; - - __gic_v3_set_lr(cpu_if->vgic_lr[i], i); - } - } - - /* - * Ensures that the above will have reached the - * (re)distributors. This ensure the guest will read the - * correct values from the memory-mapped interface. - */ - if (!cpu_if->vgic_sre) { - isb(); - dsb(sy); - } - vcpu->arch.vgic_cpu.live_lrs = live_lrs; - - /* - * Prevent the guest from touching the GIC system registers if - * SRE isn't enabled for GICv3 emulation. - */ - write_gicreg(read_gicreg(ICC_SRE_EL2) & ~ICC_SRE_EL2_ENABLE, - ICC_SRE_EL2); -} - -void __hyp_text __vgic_v3_init_lrs(void) -{ - int max_lr_idx = vtr_to_max_lr_idx(read_gicreg(ICH_VTR_EL2)); - int i; - - for (i = 0; i <= max_lr_idx; i++) - __gic_v3_set_lr(0, i); -} - -u64 __hyp_text __vgic_v3_get_ich_vtr_el2(void) -{ - return read_gicreg(ICH_VTR_EL2); -} |