diff options
Diffstat (limited to 'arch/arm64/kvm/hyp/s2-setup.c')
-rw-r--r-- | arch/arm64/kvm/hyp/s2-setup.c | 90 |
1 files changed, 0 insertions, 90 deletions
diff --git a/arch/arm64/kvm/hyp/s2-setup.c b/arch/arm64/kvm/hyp/s2-setup.c deleted file mode 100644 index 603e1ee83e89..000000000000 --- a/arch/arm64/kvm/hyp/s2-setup.c +++ /dev/null @@ -1,90 +0,0 @@ -/* - * Copyright (C) 2016 - 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/types.h> -#include <asm/kvm_arm.h> -#include <asm/kvm_asm.h> -#include <asm/kvm_hyp.h> - -u32 __hyp_text __init_stage2_translation(void) -{ - u64 val = VTCR_EL2_FLAGS; - u64 parange; - u64 tmp; - - /* - * Read the PARange bits from ID_AA64MMFR0_EL1 and set the PS - * bits in VTCR_EL2. Amusingly, the PARange is 4 bits, while - * PS is only 3. Fortunately, bit 19 is RES0 in VTCR_EL2... - */ - parange = read_sysreg(id_aa64mmfr0_el1) & 7; - if (parange > ID_AA64MMFR0_PARANGE_MAX) - parange = ID_AA64MMFR0_PARANGE_MAX; - val |= parange << 16; - - /* Compute the actual PARange... */ - switch (parange) { - case 0: - parange = 32; - break; - case 1: - parange = 36; - break; - case 2: - parange = 40; - break; - case 3: - parange = 42; - break; - case 4: - parange = 44; - break; - case 5: - default: - parange = 48; - break; - } - - /* - * ... and clamp it to 40 bits, unless we have some braindead - * HW that implements less than that. In all cases, we'll - * return that value for the rest of the kernel to decide what - * to do. - */ - val |= 64 - (parange > 40 ? 40 : parange); - - /* - * Check the availability of Hardware Access Flag / Dirty Bit - * Management in ID_AA64MMFR1_EL1 and enable the feature in VTCR_EL2. - */ - tmp = (read_sysreg(id_aa64mmfr1_el1) >> ID_AA64MMFR1_HADBS_SHIFT) & 0xf; - if (tmp) - val |= VTCR_EL2_HA; - - /* - * Read the VMIDBits bits from ID_AA64MMFR1_EL1 and set the VS - * bit in VTCR_EL2. - */ - tmp = (read_sysreg(id_aa64mmfr1_el1) >> ID_AA64MMFR1_VMIDBITS_SHIFT) & 0xf; - val |= (tmp == ID_AA64MMFR1_VMIDBITS_16) ? - VTCR_EL2_VS_16BIT : - VTCR_EL2_VS_8BIT; - - write_sysreg(val, vtcr_el2); - - return parange; -} |