[Backport]: RISC-V: KVM: Add SBI system suspend support#276
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mainline inclusion from mainline-6.10-rc1 commit 9752fed category: feature bugzilla: RVCK-Project#262 -------------------------------- Originally, the use of kvm->lock in SBI_EXT_HSM_HART_START also avoids the simultaneous updates to the reset context of target VCPU. Since this lock has been replace with vcpu->mp_state_lock, and this new lock also protects the vcpu->mp_state. We have to add a separate lock for vcpu->reset_cntx. Signed-off-by: Yong-Xuan Wang <yongxuan.wang@sifive.com> Reviewed-by: Anup Patel <anup@brainfault.org> Link: https://lore.kernel.org/r/20240417074528.16506-3-yongxuan.wang@sifive.com Signed-off-by: Anup Patel <anup@brainfault.org> Signed-off-by: Wang Yechao <wang.yechao255@zte.com.cn>
mainline inclusion from mainline-6.14-rc1 commit 023c151 category: feature bugzilla: RVCK-Project#262 -------------------------------- Implement a KVM SBI SUSP extension handler. The handler only validates the system suspend entry criteria and prepares for resuming in the appropriate state at the resume_addr (as specified by the SBI spec), but then it forwards the call to the VMM where any system suspend behavior may be implemented. Since VMM support is needed, KVM disables the extension by default. Signed-off-by: Andrew Jones <ajones@ventanamicro.com> Reviewed-by: Anup Patel <anup@brainfault.org> Link: https://lore.kernel.org/r/20241017074538.18867-5-ajones@ventanamicro.com Signed-off-by: Anup Patel <anup@brainfault.org> Signed-off-by: Wang Yechao <wang.yechao255@zte.com.cn>
mainline inclusion from mainline-6.14-rc1 commit cc57f6c category: feature bugzilla: RVCK-Project#262 -------------------------------- KVM supports SBI SUSP, so add it to the get-reg-list test. Signed-off-by: Andrew Jones <ajones@ventanamicro.com> Reviewed-by: Anup Patel <anup@brainfault.org> Link: https://lore.kernel.org/r/20241017074538.18867-6-ajones@ventanamicro.com Signed-off-by: Anup Patel <anup@brainfault.org> Signed-off-by: Wang Yechao <wang.yechao255@zte.com.cn>
mainline inclusion from mainline-6.14-rc5 commit 351e02b category: feature bugzilla: RVCK-Project#262 -------------------------------- The spec says sleep_type is 32 bits wide and "In case the data is defined as 32bit wide, higher privilege software must ensure that it only uses 32 bit data." Mask off upper bits of sleep_type before using it. Fixes: 023c151 ("RISC-V: KVM: Add SBI system suspend support") Signed-off-by: Andrew Jones <ajones@ventanamicro.com> Reviewed-by: Anup Patel <anup@brainfault.org> Link: https://lore.kernel.org/r/20250217084506.18763-12-ajones@ventanamicro.com Signed-off-by: Anup Patel <anup@brainfault.org> Signed-off-by: Wang Yechao <wang.yechao255@zte.com.cn>
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开始测试 log: https://github.com/RVCK-Project/rvck/actions/runs/26020840802 参数解析结果
测试完成 详细结果:
Kunit Test Result[08:00:49] Testing complete. Ran 457 tests: passed: 445, skipped: 12
Kernel Build Result
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issues: #262 SBI SUSP支持部分
合入L0如下补丁，使得kvm虚拟机支持SBI SUSPEND，能够支持系统挂起操作。
测试：
get-reg-list测试用例执行成功