Re: [PATCH V11 10/10] arm/arm64: KVM: add guest SEA support

Hi James, On 2017/3/22 19:14, James Morse wrote: > Hi Wang Xiongfeng, > > On 22/03/17 02:46, Xiongfeng Wang wrote: >>> Guests are a special case as QEMU may never access the faulty memory >>> itself, so >>> it won't receive the 'late' signal. It looks like ARM/arm64 KVM lacks >>> support >>>

Re: [PATCH V11 10/10] arm/arm64: KVM: add guest SEA support

Hi James, On 2017/3/22 19:14, James Morse wrote: > Hi Wang Xiongfeng, > > On 22/03/17 02:46, Xiongfeng Wang wrote: >>> Guests are a special case as QEMU may never access the faulty memory >>> itself, so >>> it won't receive the 'late' signal. It looks like ARM/arm64 KVM lacks >>> support >>>

Re: [PATCH V11 10/10] arm/arm64: KVM: add guest SEA support

Hi Wang Xiongfeng, On 22/03/17 02:46, Xiongfeng Wang wrote: >> Guests are a special case as QEMU may never access the faulty memory itself, >> so >> it won't receive the 'late' signal. It looks like ARM/arm64 KVM lacks support >> for KVM_PFN_ERR_HWPOISON which sends SIGBUS from KVM's

Re: [PATCH V11 10/10] arm/arm64: KVM: add guest SEA support

Hi Wang Xiongfeng, On 22/03/17 02:46, Xiongfeng Wang wrote: >> Guests are a special case as QEMU may never access the faulty memory itself, >> so >> it won't receive the 'late' signal. It looks like ARM/arm64 KVM lacks support >> for KVM_PFN_ERR_HWPOISON which sends SIGBUS from KVM's

Re: [PATCH V11 10/10] arm/arm64: KVM: add guest SEA support

Hi James, > Guests are a special case as QEMU may never access the faulty memory itself, > so > it won't receive the 'late' signal. It looks like ARM/arm64 KVM lacks support > for KVM_PFN_ERR_HWPOISON which sends SIGBUS from KVM's fault-handling code. I > have patches to add support for this

Re: [PATCH V11 10/10] arm/arm64: KVM: add guest SEA support

Hi James, > Guests are a special case as QEMU may never access the faulty memory itself, > so > it won't receive the 'late' signal. It looks like ARM/arm64 KVM lacks support > for KVM_PFN_ERR_HWPOISON which sends SIGBUS from KVM's fault-handling code. I > have patches to add support for this

Re: [PATCH V11 10/10] arm/arm64: KVM: add guest SEA support

Hello James, On 3/6/2017 3:28 AM, James Morse wrote: On 28/02/17 19:43, Baicar, Tyler wrote: On 2/24/2017 3:42 AM, James Morse wrote: On 21/02/17 21:22, Tyler Baicar wrote: Currently external aborts are unsupported by the guest abort handling. Add handling for SEAs so that the host kernel

Re: [PATCH V11 10/10] arm/arm64: KVM: add guest SEA support

Hello James, On 3/6/2017 3:28 AM, James Morse wrote: On 28/02/17 19:43, Baicar, Tyler wrote: On 2/24/2017 3:42 AM, James Morse wrote: On 21/02/17 21:22, Tyler Baicar wrote: Currently external aborts are unsupported by the guest abort handling. Add handling for SEAs so that the host kernel

Re: [PATCH V11 10/10] arm/arm64: KVM: add guest SEA support

Hi Tyler, On 28/02/17 19:43, Baicar, Tyler wrote: > On 2/24/2017 3:42 AM, James Morse wrote: >> On 21/02/17 21:22, Tyler Baicar wrote: >>> Currently external aborts are unsupported by the guest abort >>> handling. Add handling for SEAs so that the host kernel reports >>> SEAs which occur in the

Re: [PATCH V11 10/10] arm/arm64: KVM: add guest SEA support

Hi Tyler, On 28/02/17 19:43, Baicar, Tyler wrote: > On 2/24/2017 3:42 AM, James Morse wrote: >> On 21/02/17 21:22, Tyler Baicar wrote: >>> Currently external aborts are unsupported by the guest abort >>> handling. Add handling for SEAs so that the host kernel reports >>> SEAs which occur in the

Re: [PATCH V11 10/10] arm/arm64: KVM: add guest SEA support

Hi Marc, On 2017/3/2 17:39, Marc Zyngier wrote: > On 01/03/17 02:31, Xiongfeng Wang wrote: > > [lot of things] > >> If an SEA is injected into guest OS, the guest OS will jump to the SEA >> exception entry when the context switched to guest OS. And the CPSR and >> FAR_EL1 are recovered

Re: [PATCH V11 10/10] arm/arm64: KVM: add guest SEA support

Hi Marc, On 2017/3/2 17:39, Marc Zyngier wrote: > On 01/03/17 02:31, Xiongfeng Wang wrote: > > [lot of things] > >> If an SEA is injected into guest OS, the guest OS will jump to the SEA >> exception entry when the context switched to guest OS. And the CPSR and >> FAR_EL1 are recovered

Re: [PATCH V11 10/10] arm/arm64: KVM: add guest SEA support

Hi James, > Hi Wang Xiongfeng, > > On 25/02/17 07:15, Xiongfeng Wang wrote: >> On 2017/2/22 5:22, Tyler Baicar wrote: >>> Currently external aborts are unsupported by the guest abort >>> handling. Add handling for SEAs so that the host kernel reports >>> SEAs which occur in the guest kernel. >

Re: [PATCH V11 10/10] arm/arm64: KVM: add guest SEA support

Hi James, > Hi Wang Xiongfeng, > > On 25/02/17 07:15, Xiongfeng Wang wrote: >> On 2017/2/22 5:22, Tyler Baicar wrote: >>> Currently external aborts are unsupported by the guest abort >>> handling. Add handling for SEAs so that the host kernel reports >>> SEAs which occur in the guest kernel. >

Re: [PATCH V11 10/10] arm/arm64: KVM: add guest SEA support

On 01/03/17 02:31, Xiongfeng Wang wrote: [lot of things] > If an SEA is injected into guest OS, the guest OS will jump to the SEA > exception entry when the context switched to guest OS. And the CPSR and > FAR_EL1 are recovered according to the content of vcpu. Then the guest > OS can signal a

Re: [PATCH V11 10/10] arm/arm64: KVM: add guest SEA support

On 01/03/17 02:31, Xiongfeng Wang wrote: [lot of things] > If an SEA is injected into guest OS, the guest OS will jump to the SEA > exception entry when the context switched to guest OS. And the CPSR and > FAR_EL1 are recovered according to the content of vcpu. Then the guest > OS can signal a

Re: [PATCH V11 10/10] arm/arm64: KVM: add guest SEA support

Hi James, On 2017/2/28 21:21, James Morse wrote: > Hi, > > On 28/02/17 06:25, Xiongfeng Wang wrote: >> On 2017/2/27 21:58, James Morse wrote: >>> On 25/02/17 07:15, Xiongfeng Wang wrote: Can we inject an sea into the guest, so that the guest can kill the application which causes the

Re: [PATCH V11 10/10] arm/arm64: KVM: add guest SEA support

Hi James, On 2017/2/28 21:21, James Morse wrote: > Hi, > > On 28/02/17 06:25, Xiongfeng Wang wrote: >> On 2017/2/27 21:58, James Morse wrote: >>> On 25/02/17 07:15, Xiongfeng Wang wrote: Can we inject an sea into the guest, so that the guest can kill the application which causes the

Re: [PATCH V11 10/10] arm/arm64: KVM: add guest SEA support

Hello James, On 2/24/2017 3:42 AM, James Morse wrote: On 21/02/17 21:22, Tyler Baicar wrote: Currently external aborts are unsupported by the guest abort handling. Add handling for SEAs so that the host kernel reports SEAs which occur in the guest kernel. diff --git

Re: [PATCH V11 10/10] arm/arm64: KVM: add guest SEA support

Hello James, On 2/24/2017 3:42 AM, James Morse wrote: On 21/02/17 21:22, Tyler Baicar wrote: Currently external aborts are unsupported by the guest abort handling. Add handling for SEAs so that the host kernel reports SEAs which occur in the guest kernel. diff --git

Re: [PATCH V11 10/10] arm/arm64: KVM: add guest SEA support

Hi, On 28/02/17 06:25, Xiongfeng Wang wrote: > On 2017/2/27 21:58, James Morse wrote: >> On 25/02/17 07:15, Xiongfeng Wang wrote: >>> Can we inject an sea into the guest, so that the guest can kill the >>> application which causes the error if the guest won't be terminated >>> later. I'm not sure

Re: [PATCH V11 10/10] arm/arm64: KVM: add guest SEA support

Hi, On 28/02/17 06:25, Xiongfeng Wang wrote: > On 2017/2/27 21:58, James Morse wrote: >> On 25/02/17 07:15, Xiongfeng Wang wrote: >>> Can we inject an sea into the guest, so that the guest can kill the >>> application which causes the error if the guest won't be terminated >>> later. I'm not sure

Re: [PATCH V11 10/10] arm/arm64: KVM: add guest SEA support

Hi James, On 2017/2/27 21:58, James Morse wrote: > Hi Wang Xiongfeng, > > On 25/02/17 07:15, Xiongfeng Wang wrote: >> On 2017/2/22 5:22, Tyler Baicar wrote: >>> Currently external aborts are unsupported by the guest abort >>> handling. Add handling for SEAs so that the host kernel reports >>>

Re: [PATCH V11 10/10] arm/arm64: KVM: add guest SEA support

Hi James, On 2017/2/27 21:58, James Morse wrote: > Hi Wang Xiongfeng, > > On 25/02/17 07:15, Xiongfeng Wang wrote: >> On 2017/2/22 5:22, Tyler Baicar wrote: >>> Currently external aborts are unsupported by the guest abort >>> handling. Add handling for SEAs so that the host kernel reports >>>

Re: [PATCH V11 10/10] arm/arm64: KVM: add guest SEA support

Hi Wang Xiongfeng, On 25/02/17 07:15, Xiongfeng Wang wrote: > On 2017/2/22 5:22, Tyler Baicar wrote: >> Currently external aborts are unsupported by the guest abort >> handling. Add handling for SEAs so that the host kernel reports >> SEAs which occur in the guest kernel. >> diff --git

Re: [PATCH V11 10/10] arm/arm64: KVM: add guest SEA support

Hi Wang Xiongfeng, On 25/02/17 07:15, Xiongfeng Wang wrote: > On 2017/2/22 5:22, Tyler Baicar wrote: >> Currently external aborts are unsupported by the guest abort >> handling. Add handling for SEAs so that the host kernel reports >> SEAs which occur in the guest kernel. >> diff --git

Re: [PATCH V11 10/10] arm/arm64: KVM: add guest SEA support

@@ -1444,8 +1445,21 @@ int kvm_handle_guest_abort(struct kvm_vcpu *vcpu, struct kvm_run *run) /* Check the stage-2 fault is trans. fault or write fault */ fault_status = kvm_vcpu_trap_get_fault_type(vcpu); - if (fault_status != FSC_FAULT && fault_status != FSC_PERM && -

Re: [PATCH V11 10/10] arm/arm64: KVM: add guest SEA support

@@ -1444,8 +1445,21 @@ int kvm_handle_guest_abort(struct kvm_vcpu *vcpu, struct kvm_run *run) /* Check the stage-2 fault is trans. fault or write fault */ fault_status = kvm_vcpu_trap_get_fault_type(vcpu); - if (fault_status != FSC_FAULT && fault_status != FSC_PERM && -

Re: [PATCH V11 10/10] arm/arm64: KVM: add guest SEA support

Hi Tyler, On 2017/2/22 5:22, Tyler Baicar wrote: > Currently external aborts are unsupported by the guest abort > handling. Add handling for SEAs so that the host kernel reports > SEAs which occur in the guest kernel. > > Signed-off-by: Tyler Baicar > --- >

Re: [PATCH V11 10/10] arm/arm64: KVM: add guest SEA support

Hi Tyler, On 2017/2/22 5:22, Tyler Baicar wrote: > Currently external aborts are unsupported by the guest abort > handling. Add handling for SEAs so that the host kernel reports > SEAs which occur in the guest kernel. > > Signed-off-by: Tyler Baicar > --- > arch/arm/include/asm/kvm_arm.h

Re: [PATCH V11 10/10] arm/arm64: KVM: add guest SEA support

Hi Tyler, On 21/02/17 21:22, Tyler Baicar wrote: > Currently external aborts are unsupported by the guest abort > handling. Add handling for SEAs so that the host kernel reports > SEAs which occur in the guest kernel. > diff --git a/arch/arm/include/asm/kvm_arm.h b/arch/arm/include/asm/kvm_arm.h

Re: [PATCH V11 10/10] arm/arm64: KVM: add guest SEA support

Hi Tyler, On 21/02/17 21:22, Tyler Baicar wrote: > Currently external aborts are unsupported by the guest abort > handling. Add handling for SEAs so that the host kernel reports > SEAs which occur in the guest kernel. > diff --git a/arch/arm/include/asm/kvm_arm.h b/arch/arm/include/asm/kvm_arm.h

[PATCH V11 10/10] arm/arm64: KVM: add guest SEA support

Currently external aborts are unsupported by the guest abort handling. Add handling for SEAs so that the host kernel reports SEAs which occur in the guest kernel. Signed-off-by: Tyler Baicar --- arch/arm/include/asm/kvm_arm.h | 1 +

[PATCH V11 10/10] arm/arm64: KVM: add guest SEA support

Currently external aborts are unsupported by the guest abort handling. Add handling for SEAs so that the host kernel reports SEAs which occur in the guest kernel. Signed-off-by: Tyler Baicar --- arch/arm/include/asm/kvm_arm.h | 1 + arch/arm/include/asm/system_misc.h | 5 +