On Wed, Jun 28, 2023 at 06:30:27PM -0300, Daniel Henrique Barboza wrote: > Let's add KVM user properties for the multi-letter extensions that KVM > currently supports: zicbom, zicboz, zihintpause, zbb, ssaia, sstc, > svinval and svpbmt. > > As with MISA extensions, we're using the KVMCPUConfig type to hold > information about the state of each extension. However, multi-letter > extensions have more cases to cover than MISA extensions, so we're > adding an extra 'supported' flag as well. This flag will reflect if a > given extension is supported by KVM, i.e. KVM knows how to handle it. > This is determined during KVM extension discovery in > kvm_riscv_init_multiext_cfg(), where we test for EINVAL errors. Any > other error different from EINVAL will cause an abort. > > The use of the 'user_set' is similar to what we already do with MISA > extensions: the flag set only if the user is changing the extension > state. > > The 'supported' flag will be used later on to make an exception for > users that are disabling multi-letter extensions that are unknown to > KVM. > > Signed-off-by: Daniel Henrique Barboza <dbarb...@ventanamicro.com> > --- > target/riscv/cpu.c | 8 +++ > target/riscv/kvm.c | 119 +++++++++++++++++++++++++++++++++++++++++++++ > 2 files changed, 127 insertions(+) >
Reviewed-by: Andrew Jones <ajo...@ventanamicro.com>
