public-mirrors/linux
1
0
Fork 0
mirror of git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git synced 2025-08-05 16:54:27 +00:00
Code Issues Projects Releases Packages Wiki Activity Actions
1381147 commits 2 branches 894 tags 3.6 GiB
Commit graph

6 commits

Author SHA1 Message Date
Bibo Mao
46ecfb68dd LoongArch: KVM: Add stat information with kernel irqchip 
Move stat information about kernel irqchip from VM to vCPU, since all
vm exiting events should be vCPU relative. And also add entry with
structure kvm_vcpu_stats_desc[], so that it can display with directory
/sys/kernel/debug/kvm.

Signed-off-by: Bibo Mao <maobibo@loongson.cn>
Signed-off-by: Huacai Chen <chenhuacai@loongson.cn>
 2025-07-21 09:26:32 +08:00
Yulong Han
8b2d01fec8 LoongArch: KVM: Fix multiple typos of KVM code 
Fix multiple typos inside arch/loongarch/kvm.

Cc: stable@vger.kernel.org
Reviewed-by: Yuli Wang <wangyuli@uniontech.com>
Reviewed-by: Bibo Mao <maobibo@loongson.cn>
Signed-off-by: Yulong Han <wheatfox17@icloud.com>
Signed-off-by: Huacai Chen <chenhuacai@loongson.cn>
 2025-04-26 09:58:13 +08:00
Huacai Chen
7f71507851 LoongArch: KVM: Protect kvm_io_bus_{read,write}() with SRCU 
When we enable lockdep we get such a warning:

 =============================
 WARNING: suspicious RCU usage
 6.12.0-rc7+ #1891 Tainted: G        W
 -----------------------------
 arch/loongarch/kvm/../../../virt/kvm/kvm_main.c:5945 suspicious rcu_dereference_check() usage!
 other info that might help us debug this:
 rcu_scheduler_active = 2, debug_locks = 1
 1 lock held by qemu-system-loo/948:
  #0: 90000001184a00a8 (&vcpu->mutex){+.+.}-{4:4}, at: kvm_vcpu_ioctl+0xf4/0xe20 [kvm]
 stack backtrace:
 CPU: 2 UID: 0 PID: 948 Comm: qemu-system-loo Tainted: G        W          6.12.0-rc7+ #1891
 Tainted: [W]=WARN
 Hardware name: Loongson Loongson-3A5000-7A1000-1w-CRB/Loongson-LS3A5000-7A1000-1w-CRB, BIOS vUDK2018-LoongArch-V2.0.0-prebeta9 10/21/2022
 Stack : 0000000000000089 9000000005a0db9c 90000000071519c8 900000012c578000
         900000012c57b940 0000000000000000 900000012c57b948 9000000007e53788
         900000000815bcc8 900000000815bcc0 900000012c57b7b0 0000000000000001
         0000000000000001 4b031894b9d6b725 0000000005dec000 9000000100427b00
         00000000000003d2 0000000000000001 000000000000002d 0000000000000003
         0000000000000030 00000000000003b4 0000000005dec000 0000000000000000
         900000000806d000 9000000007e53788 00000000000000b4 0000000000000004
         0000000000000004 0000000000000000 0000000000000000 9000000107baf600
         9000000008916000 9000000007e53788 9000000005924778 000000001fe001e5
         00000000000000b0 0000000000000007 0000000000000000 0000000000071c1d
         ...
 Call Trace:
 [<9000000005924778>] show_stack+0x38/0x180
 [<90000000071519c4>] dump_stack_lvl+0x94/0xe4
 [<90000000059eb754>] lockdep_rcu_suspicious+0x194/0x240
 [<ffff80000221f47c>] kvm_io_bus_read+0x19c/0x1e0 [kvm]
 [<ffff800002225118>] kvm_emu_mmio_read+0xd8/0x440 [kvm]
 [<ffff8000022254bc>] kvm_handle_read_fault+0x3c/0xe0 [kvm]
 [<ffff80000222b3c8>] kvm_handle_exit+0x228/0x480 [kvm]

Fix it by protecting kvm_io_bus_{read,write}() with SRCU.

Cc: stable@vger.kernel.org
Reviewed-by: Bibo Mao <maobibo@loongson.cn>
Signed-off-by: Huacai Chen <chenhuacai@loongson.cn>
 2024-12-03 19:49:28 +08:00
Xianglai Li
8e3054261b LoongArch: KVM: Add IPI user mode read and write function 
Implement the communication interface between the user mode programs
and the kernel in IPI interrupt controller simulation, which is used
to obtain or send the simulation data of the interrupt controller in
the user mode process, and is also used in VM migration or VM saving
and restoration.

Signed-off-by: Min Zhou <zhoumin@loongson.cn>
Signed-off-by: Tianrui Zhao <zhaotianrui@loongson.cn>
Signed-off-by: Xianglai Li <lixianglai@loongson.cn>
Signed-off-by: Huacai Chen <chenhuacai@loongson.cn>
 2024-11-13 16:18:27 +08:00
Xianglai Li
daee2f9cae LoongArch: KVM: Add IPI read and write function 
Add implementation of IPI interrupt controller's address space read and
write function simulation.

Signed-off-by: Min Zhou <zhoumin@loongson.cn>
Signed-off-by: Tianrui Zhao <zhaotianrui@loongson.cn>
Signed-off-by: Xianglai Li <lixianglai@loongson.cn>
Signed-off-by: Huacai Chen <chenhuacai@loongson.cn>
 2024-11-13 16:18:27 +08:00
Xianglai Li
c532de5a67 LoongArch: KVM: Add IPI device support 
Add device model for IPI interrupt controller, implement basic create &
destroy interfaces, and register device model to kvm device table.

Signed-off-by: Tianrui Zhao <zhaotianrui@loongson.cn>
Signed-off-by: Xianglai Li <lixianglai@loongson.cn>
Signed-off-by: Huacai Chen <chenhuacai@loongson.cn>
 2024-11-13 16:18:27 +08:00