On Tue, Jun 20, 2023 at 6:44 PM Andrew Jones ajones@ventanamicro.com wrote:
On Tue, Jun 20, 2023 at 06:05:59PM +0800, Haibo Xu wrote:
On Fri, Jun 9, 2023 at 9:35 PM Andrew Jones ajones@ventanamicro.com wrote:
On Fri, Jun 09, 2023 at 10:12:18AM +0800, Haibo Xu wrote:
+static struct vcpu_reg_list aia_config = {
.sublists = {BASE_SUBLIST,AIA_REGS_SUBLIST,{0},},+};
+static struct vcpu_reg_list fp_f_d_config = {
.sublists = {BASE_SUBLIST,FP_F_REGS_SUBLIST,FP_D_REGS_SUBLIST,{0},},+};
+struct vcpu_reg_list *vcpu_configs[] = {
&zicbo_config,&aia_config,&fp_f_d_config,+};
+int vcpu_configs_n = ARRAY_SIZE(vcpu_configs);
2.34.1
I see we have a bit of a problem with the configs for riscv. Since we don't disable anything we're not testing, then for any test that is missing, for example, the f and d registers, we'll get output like "There are 66 new registers. Consider adding them to the blessed reg list with the following lines:" and then a dump of all the f and d registers. The test doesn't fail, but it's messy and confusing. Ideally we'd disable all registers of all sublists not in the config, probably by starting by disabling everything and then only reenabling the ones in the config.
Anything that can't be disabled is either a KVM bug, i.e. we should be able to disable it, because we can't expect every host to have it, or it needs to be in the base register sublist (meaning every host will always have it).
HI Andrew,
I found several multi-letters ISA EXT(AIA/SSTC etc) were not allowed to be disabled. Is it a bug? shall we fix it？
Extensions that a guest could use (regardless of whether or not the host described it in the guest's isa string), because the instructions or CSR accesses don't trap, can't truly be disabled. So, it's not a bug to prohibit disabling them and indeed the test cases should actually ensure disabling them fails.
So these kinds of ISA_EXT_* regs should be in the base reg list, right?
Thanks, Haibo
Thanks, drew