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https://github.com/AuxXxilium/linux_dsm_epyc7002.git
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1bbd805498
Not saving PAR_EL1 is an unfortunate oversight. If the guest performs an AT* operation and gets scheduled out before reading the result of the translation from PAREL1, it could become corrupted by another guest or the host. Saving this register is made slightly more complicated as KVM also uses it on the permission fault handling path, leading to an ugly "stash and restore" sequence. Fortunately, this is already a slow path so we don't really care. Also, Linux doesn't do any AT* operation, so Linux guests are not impacted by this bug. Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
108 lines
4.8 KiB
C
108 lines
4.8 KiB
C
/*
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* Copyright (C) 2012,2013 - ARM Ltd
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* Author: Marc Zyngier <marc.zyngier@arm.com>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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#ifndef __ARM_KVM_ASM_H__
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#define __ARM_KVM_ASM_H__
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/*
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* 0 is reserved as an invalid value.
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* Order *must* be kept in sync with the hyp switch code.
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*/
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#define MPIDR_EL1 1 /* MultiProcessor Affinity Register */
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#define CSSELR_EL1 2 /* Cache Size Selection Register */
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#define SCTLR_EL1 3 /* System Control Register */
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#define ACTLR_EL1 4 /* Auxilliary Control Register */
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#define CPACR_EL1 5 /* Coprocessor Access Control */
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#define TTBR0_EL1 6 /* Translation Table Base Register 0 */
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#define TTBR1_EL1 7 /* Translation Table Base Register 1 */
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#define TCR_EL1 8 /* Translation Control Register */
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#define ESR_EL1 9 /* Exception Syndrome Register */
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#define AFSR0_EL1 10 /* Auxilary Fault Status Register 0 */
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#define AFSR1_EL1 11 /* Auxilary Fault Status Register 1 */
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#define FAR_EL1 12 /* Fault Address Register */
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#define MAIR_EL1 13 /* Memory Attribute Indirection Register */
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#define VBAR_EL1 14 /* Vector Base Address Register */
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#define CONTEXTIDR_EL1 15 /* Context ID Register */
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#define TPIDR_EL0 16 /* Thread ID, User R/W */
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#define TPIDRRO_EL0 17 /* Thread ID, User R/O */
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#define TPIDR_EL1 18 /* Thread ID, Privileged */
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#define AMAIR_EL1 19 /* Aux Memory Attribute Indirection Register */
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#define CNTKCTL_EL1 20 /* Timer Control Register (EL1) */
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#define PAR_EL1 21 /* Physical Address Register */
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/* 32bit specific registers. Keep them at the end of the range */
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#define DACR32_EL2 22 /* Domain Access Control Register */
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#define IFSR32_EL2 23 /* Instruction Fault Status Register */
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#define FPEXC32_EL2 24 /* Floating-Point Exception Control Register */
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#define DBGVCR32_EL2 25 /* Debug Vector Catch Register */
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#define TEECR32_EL1 26 /* ThumbEE Configuration Register */
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#define TEEHBR32_EL1 27 /* ThumbEE Handler Base Register */
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#define NR_SYS_REGS 28
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/* 32bit mapping */
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#define c0_MPIDR (MPIDR_EL1 * 2) /* MultiProcessor ID Register */
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#define c0_CSSELR (CSSELR_EL1 * 2)/* Cache Size Selection Register */
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#define c1_SCTLR (SCTLR_EL1 * 2) /* System Control Register */
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#define c1_ACTLR (ACTLR_EL1 * 2) /* Auxiliary Control Register */
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#define c1_CPACR (CPACR_EL1 * 2) /* Coprocessor Access Control */
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#define c2_TTBR0 (TTBR0_EL1 * 2) /* Translation Table Base Register 0 */
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#define c2_TTBR0_high (c2_TTBR0 + 1) /* TTBR0 top 32 bits */
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#define c2_TTBR1 (TTBR1_EL1 * 2) /* Translation Table Base Register 1 */
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#define c2_TTBR1_high (c2_TTBR1 + 1) /* TTBR1 top 32 bits */
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#define c2_TTBCR (TCR_EL1 * 2) /* Translation Table Base Control R. */
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#define c3_DACR (DACR32_EL2 * 2)/* Domain Access Control Register */
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#define c5_DFSR (ESR_EL1 * 2) /* Data Fault Status Register */
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#define c5_IFSR (IFSR32_EL2 * 2)/* Instruction Fault Status Register */
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#define c5_ADFSR (AFSR0_EL1 * 2) /* Auxiliary Data Fault Status R */
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#define c5_AIFSR (AFSR1_EL1 * 2) /* Auxiliary Instr Fault Status R */
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#define c6_DFAR (FAR_EL1 * 2) /* Data Fault Address Register */
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#define c6_IFAR (c6_DFAR + 1) /* Instruction Fault Address Register */
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#define c7_PAR (PAR_EL1 * 2) /* Physical Address Register */
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#define c7_PAR_high (c7_PAR + 1) /* PAR top 32 bits */
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#define c10_PRRR (MAIR_EL1 * 2) /* Primary Region Remap Register */
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#define c10_NMRR (c10_PRRR + 1) /* Normal Memory Remap Register */
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#define c12_VBAR (VBAR_EL1 * 2) /* Vector Base Address Register */
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#define c13_CID (CONTEXTIDR_EL1 * 2) /* Context ID Register */
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#define c13_TID_URW (TPIDR_EL0 * 2) /* Thread ID, User R/W */
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#define c13_TID_URO (TPIDRRO_EL0 * 2)/* Thread ID, User R/O */
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#define c13_TID_PRIV (TPIDR_EL1 * 2) /* Thread ID, Privileged */
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#define c10_AMAIR (AMAIR_EL1 * 2) /* Aux Memory Attr Indirection Reg */
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#define c14_CNTKCTL (CNTKCTL_EL1 * 2) /* Timer Control Register (PL1) */
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#define NR_CP15_REGS (NR_SYS_REGS * 2)
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#define ARM_EXCEPTION_IRQ 0
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#define ARM_EXCEPTION_TRAP 1
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#ifndef __ASSEMBLY__
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struct kvm;
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struct kvm_vcpu;
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extern char __kvm_hyp_init[];
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extern char __kvm_hyp_init_end[];
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extern char __kvm_hyp_vector[];
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extern char __kvm_hyp_code_start[];
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extern char __kvm_hyp_code_end[];
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extern void __kvm_flush_vm_context(void);
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extern void __kvm_tlb_flush_vmid_ipa(struct kvm *kvm, phys_addr_t ipa);
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extern int __kvm_vcpu_run(struct kvm_vcpu *vcpu);
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#endif
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#endif /* __ARM_KVM_ASM_H__ */
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