!4773 Add loongarch kernel kvm support (236cb940) · Commits · EulixOS / Software / Kernel

Documentation/virt/kvm/api.rst

+61 −9

Original line number	Diff line number	Diff line
		@@ -416,6 +416,13 @@ Reads the general purpose registers from the vcpu.
		__u64 pc;
		};

		/* LoongArch */
		struct kvm_regs {
		/* out (KVM_GET_REGS) / in (KVM_SET_REGS) */
		unsigned long gpr[32];
		unsigned long pc;
		};


		4.12 KVM_SET_REGS
		-----------------
		@@ -506,7 +513,7 @@ translation mode.
		------------------

		:Capability: basic
		:Architectures: x86, ppc, mips, riscv
		:Architectures: x86, ppc, mips, riscv, loongarch
		:Type: vcpu ioctl
		:Parameters: struct kvm_interrupt (in)
		:Returns: 0 on success, negative on failure.
		@@ -592,6 +599,14 @@ b) KVM_INTERRUPT_UNSET

		This is an asynchronous vcpu ioctl and can be invoked from any thread.

		LOONGARCH:
		^^^^^^^^^^

		Queues an external interrupt to be injected into the virtual CPU. A negative
		interrupt number dequeues the interrupt.

		This is an asynchronous vcpu ioctl and can be invoked from any thread.


		4.17 KVM_DEBUG_GUEST
		--------------------
		@@ -737,7 +752,7 @@ signal mask.
		----------------

		:Capability: basic
		:Architectures: x86
		:Architectures: x86, loongarch
		:Type: vcpu ioctl
		:Parameters: struct kvm_fpu (out)
		:Returns: 0 on success, -1 on error
		@@ -746,7 +761,7 @@ Reads the floating point state from the vcpu.

		::

		/* for KVM_GET_FPU and KVM_SET_FPU */
		/* x86: for KVM_GET_FPU and KVM_SET_FPU */
		struct kvm_fpu {
		__u8 fpr[8][16];
		__u16 fcw;
		@@ -761,12 +776,21 @@ Reads the floating point state from the vcpu.
		__u32 pad2;
		};

		/* LoongArch: for KVM_GET_FPU and KVM_SET_FPU */
		struct kvm_fpu {
		__u32 fcsr;
		__u64 fcc;
		struct kvm_fpureg {
		__u64 val64[4];
		}fpr[32];
		};


		4.23 KVM_SET_FPU
		----------------

		:Capability: basic
		:Architectures: x86
		:Architectures: x86, loongarch
		:Type: vcpu ioctl
		:Parameters: struct kvm_fpu (in)
		:Returns: 0 on success, -1 on error
		@@ -775,7 +799,7 @@ Writes the floating point state to the vcpu.

		::

		/* for KVM_GET_FPU and KVM_SET_FPU */
		/* x86: for KVM_GET_FPU and KVM_SET_FPU */
		struct kvm_fpu {
		__u8 fpr[8][16];
		__u16 fcw;
		@@ -790,6 +814,15 @@ Writes the floating point state to the vcpu.
		__u32 pad2;
		};

		/* LoongArch: for KVM_GET_FPU and KVM_SET_FPU */
		struct kvm_fpu {
		__u32 fcsr;
		__u64 fcc;
		struct kvm_fpureg {
		__u64 val64[4];
		}fpr[32];
		};


		4.24 KVM_CREATE_IRQCHIP
		-----------------------
		@@ -1387,7 +1420,7 @@ documentation when it pops into existence).
		-------------------

		:Capability: KVM_CAP_ENABLE_CAP
		:Architectures: mips, ppc, s390, x86
		:Architectures: mips, ppc, s390, x86, loongarch
		:Type: vcpu ioctl
		:Parameters: struct kvm_enable_cap (in)
		:Returns: 0 on success; -1 on error
		@@ -1442,7 +1475,7 @@ for vm-wide capabilities.
		---------------------

		:Capability: KVM_CAP_MP_STATE
		:Architectures: x86, s390, arm64, riscv
		:Architectures: x86, s390, arm64, riscv, loongarch
		:Type: vcpu ioctl
		:Parameters: struct kvm_mp_state (out)
		:Returns: 0 on success; -1 on error
		@@ -1460,7 +1493,7 @@ Possible values are:

		========================== ===============================================
		KVM_MP_STATE_RUNNABLE the vcpu is currently running
		[x86,arm64,riscv]
		[x86,arm64,riscv,loongarch]
		KVM_MP_STATE_UNINITIALIZED the vcpu is an application processor (AP)
		which has not yet received an INIT signal [x86]
		KVM_MP_STATE_INIT_RECEIVED the vcpu has received an INIT signal, and is
		@@ -1516,11 +1549,14 @@ For riscv:
		The only states that are valid are KVM_MP_STATE_STOPPED and
		KVM_MP_STATE_RUNNABLE which reflect if the vcpu is paused or not.

		On LoongArch, only the KVM_MP_STATE_RUNNABLE state is used to reflect
		whether the vcpu is runnable.

		4.39 KVM_SET_MP_STATE
		---------------------

		:Capability: KVM_CAP_MP_STATE
		:Architectures: x86, s390, arm64, riscv
		:Architectures: x86, s390, arm64, riscv, loongarch
		:Type: vcpu ioctl
		:Parameters: struct kvm_mp_state (in)
		:Returns: 0 on success; -1 on error
		@@ -1538,6 +1574,9 @@ For arm64/riscv:
		The only states that are valid are KVM_MP_STATE_STOPPED and
		KVM_MP_STATE_RUNNABLE which reflect if the vcpu should be paused or not.

		On LoongArch, only the KVM_MP_STATE_RUNNABLE state is used to reflect
		whether the vcpu is runnable.

		4.40 KVM_SET_IDENTITY_MAP_ADDR
		------------------------------

		@@ -2841,6 +2880,19 @@ Following are the RISC-V D-extension registers:
		0x8020 0000 0600 0020 fcsr Floating point control and status register
		======================= ========= =============================================

		LoongArch registers are mapped using the lower 32 bits. The upper 16 bits of
		that is the register group type.

		LoongArch csr registers are used to control guest cpu or get status of guest
		cpu, and they have the following id bit patterns::

		0x9030 0000 0001 00 <reg:5> <sel:3> (64-bit)

		LoongArch KVM control registers are used to implement some new defined functions
		such as set vcpu counter or reset vcpu, and they have the following id bit patterns::

		0x9030 0000 0002 <reg:16>


		4.69 KVM_GET_ONE_REG
		--------------------

MAINTAINERS

+12 −0

Original line number	Diff line number	Diff line
		@@ -11521,6 +11521,18 @@ F: include/kvm/arm_*
		F: tools/testing/selftests/kvm/*/aarch64/
		F: tools/testing/selftests/kvm/aarch64/

		KERNEL VIRTUAL MACHINE FOR LOONGARCH (KVM/LoongArch)
		M: Tianrui Zhao <zhaotianrui@loongson.cn>
		M: Bibo Mao <maobibo@loongson.cn>
		M: Huacai Chen <chenhuacai@kernel.org>
		L: kvm@vger.kernel.org
		L: loongarch@lists.linux.dev
		S: Maintained
		T: git git://git.kernel.org/pub/scm/virt/kvm/kvm.git
		F: arch/loongarch/include/asm/kvm*
		F: arch/loongarch/include/uapi/asm/kvm*
		F: arch/loongarch/kvm/

		KERNEL VIRTUAL MACHINE FOR MIPS (KVM/mips)
		M: Huacai Chen <chenhuacai@kernel.org>
		L: linux-mips@vger.kernel.org

arch/loongarch/Kbuild

+2 −0

Original line number	Diff line number	Diff line
		@@ -3,5 +3,7 @@ obj-y += mm/
		obj-y += net/
		obj-y += vdso/

		obj-$(CONFIG_KVM) += kvm/

		# for cleaning
		subdir- += boot

arch/loongarch/Kconfig

+6 −0

Original line number	Diff line number	Diff line
		@@ -131,6 +131,7 @@ config LOONGARCH
		select HAVE_KPROBES
		select HAVE_KPROBES_ON_FTRACE
		select HAVE_KRETPROBES
		select HAVE_KVM
		select HAVE_MOD_ARCH_SPECIFIC
		select HAVE_NMI
		select HAVE_PCI
		@@ -266,6 +267,9 @@ config AS_HAS_LASX_EXTENSION
		config AS_HAS_LBT_EXTENSION
		def_bool $(as-instr,movscr2gr \$a0$(comma)\$scr0)

		config AS_HAS_LVZ_EXTENSION
		def_bool $(as-instr,hvcl 0)

		menu "Kernel type and options"

		source "kernel/Kconfig.hz"
		@@ -680,3 +684,5 @@ source "kernel/power/Kconfig"
		source "drivers/acpi/Kconfig"

		endmenu

		source "arch/loongarch/kvm/Kconfig"

arch/loongarch/configs/loongson3_defconfig

+2 −0

Original line number	Diff line number	Diff line
		@@ -70,6 +70,8 @@ CONFIG_EFI_ZBOOT=y
		CONFIG_EFI_GENERIC_STUB_INITRD_CMDLINE_LOADER=y
		CONFIG_EFI_CAPSULE_LOADER=m
		CONFIG_EFI_TEST=m
		CONFIG_VIRTUALIZATION=y
		CONFIG_KVM=m
		CONFIG_JUMP_LABEL=y
		CONFIG_MODULES=y
		CONFIG_MODULE_FORCE_LOAD=y