Jonathan Gray <j...@jsg.id.au> writes:
> On Wed, Apr 26, 2023 at 07:39:38AM +0200, Anton Lindqvist wrote: >> On Mon, Apr 24, 2023 at 10:53:57AM -0600, Dave Voutila wrote: >> > CVSROOT: /cvs >> > Module name: src >> > Changes by: d...@cvs.openbsd.org 2023/04/24 10:53:57 >> > >> > Modified files: >> > sys/arch/amd64/amd64: vmm.c >> > >> > Log message: >> > vmm(4): allow guests to enable and use supervisor IBT. >> > >> > Why should hosts have all the fun? Conditionally unmask the cpuid >> > bits for IBT and allow r/w access to the supervisor CET msr. >> > >> > Will need revisiting when we introduce usage of userland CET msr. >> > >> > ok marlkin@ >> >> Running on older hardware where CET is not enumerated causes guests to >> panic in cpu_fix_msrs() during RDMSR 0x6a2. > > vcpu_reset_regs_vmx() also has: > > if (rcr4() | CR4_CET) > vmx_setmsrbrw(vcpu, MSR_S_CET); > Thanks!
