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a1c66842f1
The same code is used twice and SBI reset sets only two variables. Reviewed-by: Andrew Jones <ajones@ventanamicro.com> Signed-off-by: Radim Krčmář <rkrcmar@ventanamicro.com> Link: https://lore.kernel.org/r/20250403112522.1566629-5-rkrcmar@ventanamicro.com Signed-off-by: Anup Patel <anup@brainfault.org>
66 lines
1.5 KiB
C
66 lines
1.5 KiB
C
// SPDX-License-Identifier: GPL-2.0
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/*
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* Copyright (c) 2024 Ventana Micro Systems Inc.
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*/
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#include <linux/kvm_host.h>
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#include <linux/wordpart.h>
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#include <asm/kvm_vcpu_sbi.h>
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#include <asm/sbi.h>
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static int kvm_sbi_ext_susp_handler(struct kvm_vcpu *vcpu, struct kvm_run *run,
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struct kvm_vcpu_sbi_return *retdata)
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{
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struct kvm_cpu_context *cp = &vcpu->arch.guest_context;
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unsigned long funcid = cp->a6;
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unsigned long hva, i;
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struct kvm_vcpu *tmp;
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switch (funcid) {
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case SBI_EXT_SUSP_SYSTEM_SUSPEND:
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if (lower_32_bits(cp->a0) != SBI_SUSP_SLEEP_TYPE_SUSPEND_TO_RAM) {
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retdata->err_val = SBI_ERR_INVALID_PARAM;
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return 0;
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}
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if (!(cp->sstatus & SR_SPP)) {
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retdata->err_val = SBI_ERR_FAILURE;
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return 0;
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}
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hva = kvm_vcpu_gfn_to_hva_prot(vcpu, cp->a1 >> PAGE_SHIFT, NULL);
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if (kvm_is_error_hva(hva)) {
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retdata->err_val = SBI_ERR_INVALID_ADDRESS;
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return 0;
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}
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kvm_for_each_vcpu(i, tmp, vcpu->kvm) {
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if (tmp == vcpu)
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continue;
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if (!kvm_riscv_vcpu_stopped(tmp)) {
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retdata->err_val = SBI_ERR_DENIED;
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return 0;
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}
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}
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kvm_riscv_vcpu_sbi_request_reset(vcpu, cp->a1, cp->a2);
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/* userspace provides the suspend implementation */
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kvm_riscv_vcpu_sbi_forward(vcpu, run);
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retdata->uexit = true;
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break;
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default:
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retdata->err_val = SBI_ERR_NOT_SUPPORTED;
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break;
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}
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return 0;
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}
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const struct kvm_vcpu_sbi_extension vcpu_sbi_ext_susp = {
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.extid_start = SBI_EXT_SUSP,
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.extid_end = SBI_EXT_SUSP,
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.default_disabled = true,
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.handler = kvm_sbi_ext_susp_handler,
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};
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