Re: [PATCH] target/i386: Export RFDS bit to guests

2024-03-20 Thread Paolo Bonzini
Queued, thanks. Paolo

Re: [PATCH] target/i386: Export RFDS bit to guests

2024-03-19 Thread Pawan Gupta
On Wed, Mar 20, 2024 at 08:23:39AM +0800, Xiaoyao Li wrote: > On 3/19/2024 11:08 PM, Pawan Gupta wrote: > > On Tue, Mar 19, 2024 at 12:22:08PM +0800, Xiaoyao Li wrote: > > > On 3/13/2024 10:53 PM, Pawan Gupta wrote: > > > > Register File Data Sampling (RFDS) is a CPU side-channel vulnerability > >

Re: [PATCH] target/i386: Export RFDS bit to guests

2024-03-19 Thread Xiaoyao Li
On 3/19/2024 11:08 PM, Pawan Gupta wrote: On Tue, Mar 19, 2024 at 12:22:08PM +0800, Xiaoyao Li wrote: On 3/13/2024 10:53 PM, Pawan Gupta wrote: Register File Data Sampling (RFDS) is a CPU side-channel vulnerability that may expose stale register value. CPUs that set RFDS_NO bit in MSR

Re: [PATCH] target/i386: Export RFDS bit to guests

2024-03-19 Thread Pawan Gupta
On Tue, Mar 19, 2024 at 12:22:08PM +0800, Xiaoyao Li wrote: > On 3/13/2024 10:53 PM, Pawan Gupta wrote: > > Register File Data Sampling (RFDS) is a CPU side-channel vulnerability > > that may expose stale register value. CPUs that set RFDS_NO bit in MSR > > IA32_ARCH_CAPABILITIES indicate that

Re: [PATCH] target/i386: Export RFDS bit to guests

2024-03-18 Thread Xiaoyao Li
On 3/13/2024 10:53 PM, Pawan Gupta wrote: Register File Data Sampling (RFDS) is a CPU side-channel vulnerability that may expose stale register value. CPUs that set RFDS_NO bit in MSR IA32_ARCH_CAPABILITIES indicate that they are not vulnerable to RFDS. Similarly, RFDS_CLEAR indicates that CPU

Re: [PATCH] target/i386: Export RFDS bit to guests

2024-03-17 Thread Pawan Gupta
On Fri, Mar 15, 2024 at 03:50:18PM +0800, Zhao Liu wrote: > > Make RFDS_CLEAR and RFDS_NO bits available to guests. > > Are these two bits going to be supported by microcode updates to > existing products? RFDS_CLEAR is supported by the microcode update that is needed to mitigate RFDS. RFDS_NO

Re: [PATCH] target/i386: Export RFDS bit to guests

2024-03-15 Thread Zhao Liu
Hi Pawan, On Wed, Mar 13, 2024 at 07:53:23AM -0700, Pawan Gupta wrote: > Date: Wed, 13 Mar 2024 07:53:23 -0700 > From: Pawan Gupta > Subject: [PATCH] target/i386: Export RFDS bit to guests > > Register File Data Sampling (RFDS) is a CPU side-channel vulnerability > tha

[PATCH] target/i386: Export RFDS bit to guests

2024-03-13 Thread Pawan Gupta
Register File Data Sampling (RFDS) is a CPU side-channel vulnerability that may expose stale register value. CPUs that set RFDS_NO bit in MSR IA32_ARCH_CAPABILITIES indicate that they are not vulnerable to RFDS. Similarly, RFDS_CLEAR indicates that CPU is affected by RFDS, and has the microcode to