Add the support code for CPU specific system registers. Not much here yet. Reviewed-by: Christopher Covington <c...@codeaurora.org> Signed-off-by: Marc Zyngier <marc.zyng...@arm.com> --- arch/arm64/kvm/sys_regs_generic_v8.c | 85 ++++++++++++++++++++++++++++++++++++ 1 file changed, 85 insertions(+) create mode 100644 arch/arm64/kvm/sys_regs_generic_v8.c
diff --git a/arch/arm64/kvm/sys_regs_generic_v8.c b/arch/arm64/kvm/sys_regs_generic_v8.c new file mode 100644 index 0000000..d4e8039 --- /dev/null +++ b/arch/arm64/kvm/sys_regs_generic_v8.c @@ -0,0 +1,85 @@ +/* + * Copyright (C) 2012,2013 - ARM Ltd + * Author: Marc Zyngier <marc.zyng...@arm.com> + * + * Based on arch/arm/kvm/coproc_a15.c: + * Copyright (C) 2012 - Virtual Open Systems and Columbia University + * Authors: Rusty Russell <ru...@rustcorp.au> + * Christoffer Dall <c.d...@virtualopensystems.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/kvm_host.h> +#include <asm/cputype.h> +#include <asm/kvm_arm.h> +#include <asm/kvm_asm.h> +#include <asm/kvm_host.h> +#include <asm/kvm_emulate.h> +#include <asm/kvm_coproc.h> +#include <linux/init.h> + +#include "sys_regs.h" + +static bool access_actlr(struct kvm_vcpu *vcpu, + const struct sys_reg_params *p, + const struct sys_reg_desc *r) +{ + if (p->is_write) + return ignore_write(vcpu, p); + + *vcpu_reg(vcpu, p->Rt) = vcpu_sys_reg(vcpu, ACTLR_EL1); + return true; +} + +static void reset_actlr(struct kvm_vcpu *vcpu, const struct sys_reg_desc *r) +{ + u64 actlr; + + asm volatile("mrs %0, actlr_el1\n" : "=r" (actlr)); + vcpu_sys_reg(vcpu, ACTLR_EL1) = actlr; +} + +/* + * Implementation specific sys-reg registers. + * Important: Must be sorted ascending by Op0, Op1, CRn, CRm, Op2 + */ +static const struct sys_reg_desc genericv8_sys_regs[] = { + /* ACTLR_EL1 */ + { Op0(0b11), Op1(0b000), CRn(0b0001), CRm(0b0000), Op2(0b001), + access_actlr, reset_actlr, ACTLR_EL1 }, +}; + +static struct kvm_sys_reg_target_table genericv8_target_table = { + .table64 = { + .table = genericv8_sys_regs, + .num = ARRAY_SIZE(genericv8_sys_regs), + }, +}; + +static int __init sys_reg_genericv8_init(void) +{ + unsigned int i; + + for (i = 1; i < ARRAY_SIZE(genericv8_sys_regs); i++) + BUG_ON(cmp_sys_reg(&genericv8_sys_regs[i-1], + &genericv8_sys_regs[i]) >= 0); + + kvm_register_target_sys_reg_table(KVM_ARM_TARGET_AEM_V8, + &genericv8_target_table); + kvm_register_target_sys_reg_table(KVM_ARM_TARGET_FOUNDATION_V8, + &genericv8_target_table); + kvm_register_target_sys_reg_table(KVM_ARM_TARGET_CORTEX_A57, + &genericv8_target_table); + return 0; +} +late_initcall(sys_reg_genericv8_init); -- 1.8.1.4 -- To unsubscribe from this list: send the line "unsubscribe kvm" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
