diff options
author | Paolo Bonzini | 2019-07-11 15:14:16 +0200 |
---|---|---|
committer | Paolo Bonzini | 2019-07-11 15:14:16 +0200 |
commit | a45ff5994c9cde41af627c46abb9f32beae68943 (patch) | |
tree | b726cc506ed1b01484f183ab2679cdd618e1e9b1 /arch/arm/include/asm/kvm_host.h | |
parent | Documentation: virtual: Add toctree hooks (diff) | |
parent | KVM: arm/arm64: Initialise host's MPIDRs by reading the actual register (diff) | |
download | kernel-qcow2-linux-a45ff5994c9cde41af627c46abb9f32beae68943.tar.gz kernel-qcow2-linux-a45ff5994c9cde41af627c46abb9f32beae68943.tar.xz kernel-qcow2-linux-a45ff5994c9cde41af627c46abb9f32beae68943.zip |
Merge tag 'kvm-arm-for-5.3' of git://git.kernel.org/pub/scm/linux/kernel/git/kvmarm/kvmarm into HEAD
KVM/arm updates for 5.3
- Add support for chained PMU counters in guests
- Improve SError handling
- Handle Neoverse N1 erratum #1349291
- Allow side-channel mitigation status to be migrated
- Standardise most AArch64 system register accesses to msr_s/mrs_s
- Fix host MPIDR corruption on 32bit
Diffstat (limited to 'arch/arm/include/asm/kvm_host.h')
-rw-r--r-- | arch/arm/include/asm/kvm_host.h | 32 |
1 files changed, 12 insertions, 20 deletions
diff --git a/arch/arm/include/asm/kvm_host.h b/arch/arm/include/asm/kvm_host.h index 075e1921fdd9..8a37c8e89777 100644 --- a/arch/arm/include/asm/kvm_host.h +++ b/arch/arm/include/asm/kvm_host.h @@ -1,19 +1,7 @@ +/* SPDX-License-Identifier: GPL-2.0-only */ /* * Copyright (C) 2012 - Virtual Open Systems and Columbia University * Author: Christoffer Dall <c.dall@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, write to the Free Software - * Foundation, 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. */ #ifndef __ARM_KVM_HOST_H__ @@ -27,7 +15,6 @@ #include <asm/kvm_asm.h> #include <asm/kvm_mmio.h> #include <asm/fpstate.h> -#include <asm/smp_plat.h> #include <kvm/arm_arch_timer.h> #define __KVM_HAVE_ARCH_INTC_INITIALIZED @@ -159,11 +146,10 @@ struct kvm_host_data { typedef struct kvm_host_data kvm_host_data_t; -static inline void kvm_init_host_cpu_context(struct kvm_cpu_context *cpu_ctxt, - int cpu) +static inline void kvm_init_host_cpu_context(struct kvm_cpu_context *cpu_ctxt) { /* The host's MPIDR is immutable, so let's set it up at boot time */ - cpu_ctxt->cp15[c0_MPIDR] = cpu_logical_map(cpu); + cpu_ctxt->cp15[c0_MPIDR] = read_cpuid_mpidr(); } struct vcpu_reset_state { @@ -374,7 +360,11 @@ static inline void kvm_vcpu_pmu_restore_host(struct kvm_vcpu *vcpu) {} static inline void kvm_arm_vhe_guest_enter(void) {} static inline void kvm_arm_vhe_guest_exit(void) {} -static inline bool kvm_arm_harden_branch_predictor(void) +#define KVM_BP_HARDEN_UNKNOWN -1 +#define KVM_BP_HARDEN_WA_NEEDED 0 +#define KVM_BP_HARDEN_NOT_REQUIRED 1 + +static inline int kvm_arm_harden_branch_predictor(void) { switch(read_cpuid_part()) { #ifdef CONFIG_HARDEN_BRANCH_PREDICTOR @@ -382,10 +372,12 @@ static inline bool kvm_arm_harden_branch_predictor(void) case ARM_CPU_PART_CORTEX_A12: case ARM_CPU_PART_CORTEX_A15: case ARM_CPU_PART_CORTEX_A17: - return true; + return KVM_BP_HARDEN_WA_NEEDED; #endif + case ARM_CPU_PART_CORTEX_A7: + return KVM_BP_HARDEN_NOT_REQUIRED; default: - return false; + return KVM_BP_HARDEN_UNKNOWN; } } |