Hi Marc, On 7/12/23 16:57, Marc Zyngier wrote: > As people are getting tired of seeing the full NV series, I've > extracted some of the easy stuff which I'm targeting for 6.6. > > This implements the so called "trap forwarding" infrastructure, which > gets used when we take a trap from an L2 guest and that the L1 guest > wants to see the trap for itself. > > Most of the series is pretty boring stuff, mostly a long list of > encodings which are mapped to a set of trap bits. I swear they are > correct. Sort of. > > The interesting bit is around how we compute the trap result, which is > pretty complex due to the layers of crap the architecture has piled > over the years (a single op can be trapped by multiple coarse grained > trap bits, or a fine grained trap bit, which may itself be conditioned > by another control bit -- madness). > > This also results in some rework of both the FGT stuff (for which I > carry a patch from Mark) and newly introduced the HCRX support. > > With that (and the rest of the NV series[1]), FGT gets exposed to guests > and the trapping seems to work as expected. > > [1] https://git.kernel.org/pub/scm/linux/kernel/git/maz/arm-platforms.git/log/?h=kvm-arm64/nv-6.6-WIP I have not received patches 10-27 and I do not see them on lore archive https://lore.kernel.org/all/20230712145810.3864793-1-maz@xxxxxxxxxx/#r Thanks Eric > > Marc Zyngier (26): > arm64: Add missing VA CMO encodings > arm64: Add missing ERX*_EL1 encodings > arm64: Add missing DC ZVA/GVA/GZVA encodings > arm64: Add TLBI operation encodings > arm64: Add AT operation encodings > arm64: Add debug registers affected by HDFGxTR_EL2 > arm64: Add missing BRB/CFP/DVP/CPP instructions > arm64: Fix HFGxTR_EL2 field naming > arm64: Add HDFGRTR_EL2 and HDFGWTR_EL2 layouts > KVM: arm64: Correctly handle ACCDATA_EL1 traps > KVM: arm64: Add missing HCR_EL2 trap bits > KVM: arm64: nv: Add FGT registers > KVM: arm64: Restructure FGT register switching > KVM: arm64: nv: Add trap forwarding infrastructure > KVM: arm64: nv: Add trap forwarding for HCR_EL2 > KVM: arm64: nv: Expose FEAT_EVT to nested guests > KVM: arm64: nv: Add trap forwarding for MDCR_EL2 > KVM: arm64: nv: Add trap forwarding for CNTHCTL_EL2 > KVM: arm64: nv: Add trap forwarding for HFGxTR_EL2 > KVM: arm64: nv: Add trap forwarding for HFGITR_EL2 > KVM: arm64: nv: Add trap forwarding for HDFGxTR_EL2 > KVM: arm64: nv: Add SVC trap forwarding > KVM: arm64: nv: Add switching support for HFGxTR/HDFGxTR > KVM: arm64: nv: Expose FGT to nested guests > KVM: arm64: Move HCRX_EL2 switch to load/put on VHE systems > KVM: arm64: nv: Add support for HCRX_EL2 > > Mark Brown (1): > arm64: Add feature detection for fine grained traps > > arch/arm64/include/asm/kvm_arm.h | 50 + > arch/arm64/include/asm/kvm_host.h | 7 + > arch/arm64/include/asm/kvm_nested.h | 2 + > arch/arm64/include/asm/sysreg.h | 270 +++- > arch/arm64/kernel/cpufeature.c | 11 + > arch/arm64/kvm/arm.c | 4 + > arch/arm64/kvm/emulate-nested.c | 1703 +++++++++++++++++++++++ > arch/arm64/kvm/handle_exit.c | 12 + > arch/arm64/kvm/hyp/include/hyp/switch.h | 126 +- > arch/arm64/kvm/nested.c | 11 +- > arch/arm64/kvm/sys_regs.c | 15 + > arch/arm64/kvm/trace_arm.h | 19 + > arch/arm64/tools/cpucaps | 1 + > arch/arm64/tools/sysreg | 141 +- > 14 files changed, 2326 insertions(+), 46 deletions(-) >
