Re: [RFC v1 12/26] x86/tdx: Handle in-kernel MMIO

2021-04-01 Thread Dave Hansen
On 4/1/21 3:26 PM, Sean Christopherson wrote: > On Thu, Apr 01, 2021, Dave Hansen wrote: >> On 2/5/21 3:38 PM, Kuppuswamy Sathyanarayanan wrote: >>> From: "Kirill A. Shutemov" >>> >>> Handle #VE due to MMIO operations. MMIO triggers #VE with EPT_VIOLATION >>> exit reason. >>> >>> For now we only h

Re: [RFC v1 12/26] x86/tdx: Handle in-kernel MMIO

2021-04-01 Thread Sean Christopherson
On Thu, Apr 01, 2021, Dave Hansen wrote: > On 2/5/21 3:38 PM, Kuppuswamy Sathyanarayanan wrote: > > From: "Kirill A. Shutemov" > > > > Handle #VE due to MMIO operations. MMIO triggers #VE with EPT_VIOLATION > > exit reason. > > > > For now we only handle subset of instruction that kernel uses fo

Re: [RFC v1 12/26] x86/tdx: Handle in-kernel MMIO

2021-04-01 Thread Dave Hansen
On 2/5/21 3:38 PM, Kuppuswamy Sathyanarayanan wrote: > From: "Kirill A. Shutemov" > > Handle #VE due to MMIO operations. MMIO triggers #VE with EPT_VIOLATION > exit reason. > > For now we only handle subset of instruction that kernel uses for MMIO > oerations. User-space access triggers SIGBUS.

[RFC v1 12/26] x86/tdx: Handle in-kernel MMIO

2021-02-05 Thread Kuppuswamy Sathyanarayanan
From: "Kirill A. Shutemov" Handle #VE due to MMIO operations. MMIO triggers #VE with EPT_VIOLATION exit reason. For now we only handle subset of instruction that kernel uses for MMIO oerations. User-space access triggers SIGBUS. Signed-off-by: Kirill A. Shutemov Reviewed-by: Andi Kleen Signed