From: Tianrui Zhao <zhaotianrui@loongson.cn>
To: Paolo Bonzini <pbonzini@redhat.com>
Cc: Huacai Chen <chenhuacai@kernel.org>,
WANG Xuerui <kernel@xen0n.name>,
Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
loongarch@lists.linux.dev, linux-kernel@vger.kernel.org,
kvm@vger.kernel.org, Jens Axboe <axboe@kernel.dk>,
Mark Brown <broonie@kernel.org>,
Alex Deucher <alexander.deucher@amd.com>,
Oliver Upton <oliver.upton@linux.dev>,
maobibo@loongson.cn, Xi Ruoyao <xry111@xry111.site>
Subject: [PATCH v4 26/29] LoongArch: KVM: Implement kvm exception vector
Date: Tue, 21 Mar 2023 11:56:48 +0800 [thread overview]
Message-ID: <20230321035651.598505-27-zhaotianrui@loongson.cn> (raw)
In-Reply-To: <20230321035651.598505-1-zhaotianrui@loongson.cn>
Implement kvm exception vector, using _kvm_fault_tables array to save
the handle function pointer and it is used when vcpu handle exit.
Signed-off-by: Tianrui Zhao <zhaotianrui@loongson.cn>
---
arch/loongarch/kvm/exit.c | 48 +++++++++++++++++++++++++++++++++++++++
1 file changed, 48 insertions(+)
diff --git a/arch/loongarch/kvm/exit.c b/arch/loongarch/kvm/exit.c
index fc2152e09..1f95189f6 100644
--- a/arch/loongarch/kvm/exit.c
+++ b/arch/loongarch/kvm/exit.c
@@ -651,3 +651,51 @@ static int _kvm_handle_fpu_disabled(struct kvm_vcpu *vcpu)
kvm_own_fpu(vcpu);
return RESUME_GUEST;
}
+
+/*
+ * Loongarch KVM callback handling for not implemented guest exiting
+ */
+static int _kvm_fault_ni(struct kvm_vcpu *vcpu)
+{
+ unsigned long estat, badv;
+ unsigned int exccode, inst;
+
+ /*
+ * Fetch the instruction.
+ */
+ badv = vcpu->arch.badv;
+ estat = vcpu->arch.host_estat;
+ exccode = (estat & CSR_ESTAT_EXC) >> CSR_ESTAT_EXC_SHIFT;
+ inst = vcpu->arch.badi;
+ kvm_err("Exccode: %d PC=%#lx inst=0x%08x BadVaddr=%#lx estat=%#llx\n",
+ exccode, vcpu->arch.pc, inst, badv, read_gcsr_estat());
+ kvm_arch_vcpu_dump_regs(vcpu);
+ vcpu->run->exit_reason = KVM_EXIT_INTERNAL_ERROR;
+
+ return RESUME_HOST;
+}
+
+static exit_handle_fn _kvm_fault_tables[EXCCODE_INT_START] = {
+ [EXCCODE_TLBL] = _kvm_handle_read_fault,
+ [EXCCODE_TLBI] = _kvm_handle_read_fault,
+ [EXCCODE_TLBNR] = _kvm_handle_read_fault,
+ [EXCCODE_TLBNX] = _kvm_handle_read_fault,
+ [EXCCODE_TLBS] = _kvm_handle_write_fault,
+ [EXCCODE_TLBM] = _kvm_handle_write_fault,
+ [EXCCODE_FPDIS] = _kvm_handle_fpu_disabled,
+ [EXCCODE_GSPR] = _kvm_handle_gspr,
+};
+
+int _kvm_handle_fault(struct kvm_vcpu *vcpu, int fault)
+{
+ return _kvm_fault_tables[fault](vcpu);
+}
+
+void _kvm_init_fault(void)
+{
+ int i;
+
+ for (i = 0; i < EXCCODE_INT_START; i++)
+ if (!_kvm_fault_tables[i])
+ _kvm_fault_tables[i] = _kvm_fault_ni;
+}
--
2.31.1
next prev parent reply other threads:[~2023-03-21 3:58 UTC|newest]
Thread overview: 34+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-03-21 3:56 [PATCH v4 00/29] Add KVM LoongArch support Tianrui Zhao
2023-03-21 3:56 ` [PATCH v4 01/29] LoongArch: KVM: Add kvm related header files Tianrui Zhao
2023-03-21 3:56 ` [PATCH v4 02/29] LoongArch: KVM: Implement kvm module related interface Tianrui Zhao
2023-03-21 3:56 ` [PATCH v4 03/29] LoongArch: KVM: Implement kvm hardware enable, disable interface Tianrui Zhao
2023-03-21 3:56 ` [PATCH v4 04/29] LoongArch: KVM: Implement VM related functions Tianrui Zhao
2023-03-21 3:56 ` [PATCH v4 05/29] LoongArch: KVM: Add vcpu related header files Tianrui Zhao
2023-03-21 12:30 ` Xi Ruoyao
2023-03-22 1:34 ` Tianrui Zhao
2023-03-21 3:56 ` [PATCH v4 06/29] LoongArch: KVM: Implement vcpu create and destroy interface Tianrui Zhao
2023-03-21 3:56 ` [PATCH v4 07/29] LoongArch: KVM: Implement vcpu run interface Tianrui Zhao
2023-03-21 3:56 ` [PATCH v4 08/29] LoongArch: KVM: Implement vcpu handle exit interface Tianrui Zhao
2023-03-21 3:56 ` [PATCH v4 09/29] LoongArch: KVM: Implement vcpu get, vcpu set registers Tianrui Zhao
2023-03-21 3:56 ` [PATCH v4 10/29] LoongArch: KVM: Implement vcpu ENABLE_CAP ioctl interface Tianrui Zhao
2023-03-21 3:56 ` [PATCH v4 11/29] LoongArch: KVM: Implement fpu related operations for vcpu Tianrui Zhao
2023-03-21 3:56 ` [PATCH v4 12/29] LoongArch: KVM: Implement vcpu interrupt operations Tianrui Zhao
2023-03-21 3:56 ` [PATCH v4 13/29] LoongArch: KVM: Implement misc vcpu related interfaces Tianrui Zhao
2023-03-21 3:56 ` [PATCH v4 14/29] LoongArch: KVM: Implement vcpu load and vcpu put operations Tianrui Zhao
2023-03-21 3:56 ` [PATCH v4 15/29] LoongArch: KVM: Implement vcpu status description Tianrui Zhao
2023-03-21 3:56 ` [PATCH v4 16/29] LoongArch: KVM: Implement update VM id function Tianrui Zhao
2023-03-21 3:56 ` [PATCH v4 17/29] LoongArch: KVM: Implement virtual machine tlb operations Tianrui Zhao
2023-03-21 3:56 ` [PATCH v4 18/29] LoongArch: KVM: Implement vcpu timer operations Tianrui Zhao
2023-03-21 3:56 ` [PATCH v4 19/29] LoongArch: KVM: Implement kvm mmu operations Tianrui Zhao
2023-03-21 3:56 ` [PATCH v4 20/29] LoongArch: KVM: Implement handle csr excption Tianrui Zhao
2023-03-21 3:56 ` [PATCH v4 21/29] LoongArch: KVM: Implement handle iocsr exception Tianrui Zhao
2023-03-21 3:56 ` [PATCH v4 22/29] LoongArch: KVM: Implement handle idle exception Tianrui Zhao
2023-03-21 3:56 ` [PATCH v4 23/29] LoongArch: KVM: Implement handle gspr exception Tianrui Zhao
2023-03-21 3:56 ` [PATCH v4 24/29] LoongArch: KVM: Implement handle mmio exception Tianrui Zhao
2023-03-21 3:56 ` [PATCH v4 25/29] LoongArch: KVM: Implement handle fpu exception Tianrui Zhao
2023-03-21 3:56 ` Tianrui Zhao [this message]
2023-03-21 3:56 ` [PATCH v4 27/29] LoongArch: KVM: Implement vcpu world switch Tianrui Zhao
2023-03-21 8:07 ` kernel test robot
2023-03-21 3:56 ` [PATCH v4 28/29] LoongArch: KVM: Implement probe virtualization when loongarch cpu init Tianrui Zhao
2023-03-21 3:56 ` [PATCH v4 29/29] LoongArch: KVM: Enable kvm config and add the makefile Tianrui Zhao
2023-03-21 8:48 ` kernel test robot
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