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https://git.kernel.org/pub/scm/linux/kernel/git/chenhuacai/linux-loongson
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d0d81e03e6
Userspace will soon be able to change the value of MIDR_EL1. Prepare by loading VPIDR_EL2 with the guest value for non-nested VMs. Since VPIDR_EL2 is set for any VM, get rid of the NV-specific cleanup of reloading the hardware value on vcpu_put(). And for nVHE, load the hardware value before switching to the host. Link: https://lore.kernel.org/r/20250225005401.679536-4-oliver.upton@linux.dev Signed-off-by: Oliver Upton <oliver.upton@linux.dev>
38 lines
878 B
C
38 lines
878 B
C
// SPDX-License-Identifier: GPL-2.0-only
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/*
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* Copyright (C) 2012-2015 - ARM Ltd
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* Author: Marc Zyngier <marc.zyngier@arm.com>
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*/
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#include <hyp/sysreg-sr.h>
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#include <linux/compiler.h>
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#include <linux/kvm_host.h>
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#include <asm/kprobes.h>
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#include <asm/kvm_asm.h>
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#include <asm/kvm_emulate.h>
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#include <asm/kvm_hyp.h>
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/*
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* Non-VHE: Both host and guest must save everything.
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*/
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void __sysreg_save_state_nvhe(struct kvm_cpu_context *ctxt)
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{
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__sysreg_save_el1_state(ctxt);
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__sysreg_save_common_state(ctxt);
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__sysreg_save_user_state(ctxt);
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__sysreg_save_el2_return_state(ctxt);
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}
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void __sysreg_restore_state_nvhe(struct kvm_cpu_context *ctxt)
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{
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u64 midr = ctxt_midr_el1(ctxt);
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__sysreg_restore_el1_state(ctxt, midr, ctxt_sys_reg(ctxt, MPIDR_EL1));
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__sysreg_restore_common_state(ctxt);
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__sysreg_restore_user_state(ctxt);
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__sysreg_restore_el2_return_state(ctxt);
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}
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