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Message-Id: <20231102155111.28821-8-guang.zeng@intel.com>
Date: Thu, 2 Nov 2023 23:51:10 +0800
From: Zeng Guang <guang.zeng@...el.com>
To: Sean Christopherson <seanjc@...gle.com>,
Paolo Bonzini <pbonzini@...hat.com>,
Shuah Khan <shuah@...nel.org>, Marc Zyngier <maz@...nel.org>,
Oliver Upton <oliver.upton@...ux.dev>,
James Morse <james.morse@....com>,
Suzuki K Poulose <suzuki.poulose@....com>,
Zenghui Yu <yuzenghui@...wei.com>,
Anup Patel <anup@...infault.org>,
Atish Patra <atishp@...shpatra.org>,
David Hildenbrand <david@...hat.com>
Cc: kvm@...r.kernel.org, linux-kselftest@...r.kernel.org,
linux-kernel@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
kvmarm@...ts.linux.dev, kvm-riscv@...ts.infradead.org,
linux-riscv@...ts.infradead.org, Zeng Guang <guang.zeng@...el.com>
Subject: [RFC PATCH v1 7/8] KVM: selftests: x86: Support vcpu run in user mode
Introduce vcpu_setup_user_mode() to support vcpu run in user mode.
Signed-off-by: Zeng Guang <guang.zeng@...el.com>
---
.../selftests/kvm/include/x86_64/processor.h | 1 +
.../selftests/kvm/lib/x86_64/processor.c | 19 +++++++++++++++++++
2 files changed, 20 insertions(+)
diff --git a/tools/testing/selftests/kvm/include/x86_64/processor.h b/tools/testing/selftests/kvm/include/x86_64/processor.h
index 9c8224c80664..2534bdf8aa71 100644
--- a/tools/testing/selftests/kvm/include/x86_64/processor.h
+++ b/tools/testing/selftests/kvm/include/x86_64/processor.h
@@ -800,6 +800,7 @@ static inline void cpu_relax(void)
struct kvm_x86_state *vcpu_save_state(struct kvm_vcpu *vcpu);
void vcpu_load_state(struct kvm_vcpu *vcpu, struct kvm_x86_state *state);
void kvm_x86_state_cleanup(struct kvm_x86_state *state);
+void vcpu_setup_user_mode(struct kvm_vcpu *vcpu, void *guest_code);
const struct kvm_msr_list *kvm_get_msr_index_list(void);
const struct kvm_msr_list *kvm_get_feature_msr_index_list(void);
diff --git a/tools/testing/selftests/kvm/lib/x86_64/processor.c b/tools/testing/selftests/kvm/lib/x86_64/processor.c
index 7647c3755ca2..c84292b35f2d 100644
--- a/tools/testing/selftests/kvm/lib/x86_64/processor.c
+++ b/tools/testing/selftests/kvm/lib/x86_64/processor.c
@@ -1071,6 +1071,25 @@ void vcpu_load_state(struct kvm_vcpu *vcpu, struct kvm_x86_state *state)
vcpu_nested_state_set(vcpu, &state->nested);
}
+void vcpu_setup_user_mode(struct kvm_vcpu *vcpu, void *guest_code)
+{
+ struct kvm_sregs sregs;
+ struct kvm_regs regs;
+ struct kvm_vm *vm = vcpu->vm;
+
+ vcpu_sregs_get(vcpu, &sregs);
+ kvm_seg_set_code_64bit(vm, USER_CODE_SELECTOR, &sregs.cs);
+ kvm_seg_set_data_64bit(vm, USER_DATA_SELECTOR, &sregs.ds);
+ kvm_seg_set_data_64bit(vm, USER_DATA_SELECTOR, &sregs.es);
+ kvm_seg_set_data_64bit(vm, USER_DATA_SELECTOR, &sregs.ss);
+ vcpu_sregs_set(vcpu, &sregs);
+
+ vcpu_regs_get(vcpu, ®s);
+ regs.rsp = vcpu->stack_vaddr - (DEFAULT_STACK_PGS >> 1) * getpagesize();
+ regs.rip = (unsigned long) guest_code;
+ vcpu_regs_set(vcpu, ®s);
+}
+
void kvm_x86_state_cleanup(struct kvm_x86_state *state)
{
free(state->xsave);
--
2.21.3
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