Message ID | 20240226143630.33643-37-jiangshanlai@gmail.com (mailing list archive) |
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State | New, archived |
Headers | show
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Peter Anvin" <hpa@zytor.com> Subject: [RFC PATCH 36/73] KVM: x86/PVM: Handle KVM hypercall Date: Mon, 26 Feb 2024 22:35:53 +0800 Message-Id: <20240226143630.33643-37-jiangshanlai@gmail.com> X-Mailer: git-send-email 2.19.1.6.gb485710b In-Reply-To: <20240226143630.33643-1-jiangshanlai@gmail.com> References: <20240226143630.33643-1-jiangshanlai@gmail.com> Precedence: bulk X-Mailing-List: kvm@vger.kernel.org List-Id: <kvm.vger.kernel.org> List-Subscribe: <mailto:kvm+subscribe@vger.kernel.org> List-Unsubscribe: <mailto:kvm+unsubscribe@vger.kernel.org> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit |
Series |
KVM: x86/PVM: Introduce a new hypervisor
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diff --git a/arch/x86/kvm/pvm/pvm.c b/arch/x86/kvm/pvm/pvm.c index a2602d9828a5..242c355fda8f 100644 --- a/arch/x86/kvm/pvm/pvm.c +++ b/arch/x86/kvm/pvm/pvm.c @@ -1221,6 +1221,18 @@ static int handle_synthetic_instruction_return_supervisor(struct kvm_vcpu *vcpu) return 1; } +static int handle_kvm_hypercall(struct kvm_vcpu *vcpu) +{ + int r; + + // In PVM, r10 is the replacement for rcx in hypercall + kvm_rcx_write(vcpu, kvm_r10_read(vcpu)); + r = kvm_emulate_hypercall_noskip(vcpu); + kvm_r10_write(vcpu, kvm_rcx_read(vcpu)); + + return r; +} + static int handle_exit_syscall(struct kvm_vcpu *vcpu) { struct vcpu_pvm *pvm = to_pvm(vcpu); @@ -1233,7 +1245,8 @@ static int handle_exit_syscall(struct kvm_vcpu *vcpu) return handle_synthetic_instruction_return_user(vcpu); if (rip == pvm->msr_rets_rip_plus2) return handle_synthetic_instruction_return_supervisor(vcpu); - return 1; + + return handle_kvm_hypercall(vcpu); } static int handle_exit_debug(struct kvm_vcpu *vcpu)