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KVM: riscv: selftests: Fix ISA_EXT register handling in get-reg-list 

Same set of ISA_EXT registers are not present on all host because
ISA_EXT registers are visible to the KVM user space based on the
ISA extensions available on the host. Also, disabling an ISA
extension using corresponding ISA_EXT register does not affect
the visibility of the ISA_EXT register itself.

Based on the above, we should filter-out all ISA_EXT registers.

Fixes: 477069398e ("KVM: riscv: selftests: Add get-reg-list test")
Signed-off-by: Anup Patel <apatel@ventanamicro.com>
Reviewed-by: Andrew Jones <ajones@ventanamicro.com>
Signed-off-by: Anup Patel <anup@brainfault.org>
This commit is contained in:
Anup Patel 2023-09-18 14:29:19 +05:30 committed by Anup Patel
parent 17f71a2a34
commit ba1af6e2e0
1 changed files with 22 additions and 15 deletions
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37
tools/testing/selftests/kvm/riscv/get-reg-list.c
View File

@ -14,17 +14,33 @@
bool filter_reg(__u64 reg)
{
/*
* Some ISA extensions are optional and not present on all host,
* but they can't be disabled through ISA_EXT registers when present.
* So, to make life easy, just filtering out these kind of registers.
*/
switch (reg & ~REG_MASK) {
/*
* Same set of ISA_EXT registers are not present on all host because
* ISA_EXT registers are visible to the KVM user space based on the
* ISA extensions available on the host. Also, disabling an ISA
* extension using corresponding ISA_EXT register does not affect
* the visibility of the ISA_EXT register itself.
*
* Based on above, we should filter-out all ISA_EXT registers.
*/
case KVM_REG_RISCV_ISA_EXT | KVM_RISCV_ISA_EXT_A:
case KVM_REG_RISCV_ISA_EXT | KVM_RISCV_ISA_EXT_C:
case KVM_REG_RISCV_ISA_EXT | KVM_RISCV_ISA_EXT_D:
case KVM_REG_RISCV_ISA_EXT | KVM_RISCV_ISA_EXT_F:
case KVM_REG_RISCV_ISA_EXT | KVM_RISCV_ISA_EXT_H:
case KVM_REG_RISCV_ISA_EXT | KVM_RISCV_ISA_EXT_I:
case KVM_REG_RISCV_ISA_EXT | KVM_RISCV_ISA_EXT_M:
case KVM_REG_RISCV_ISA_EXT | KVM_RISCV_ISA_EXT_SVPBMT:
case KVM_REG_RISCV_ISA_EXT | KVM_RISCV_ISA_EXT_SSTC:
case KVM_REG_RISCV_ISA_EXT | KVM_RISCV_ISA_EXT_SVINVAL:
case KVM_REG_RISCV_ISA_EXT | KVM_RISCV_ISA_EXT_ZIHINTPAUSE:
case KVM_REG_RISCV_ISA_EXT | KVM_RISCV_ISA_EXT_ZICBOM:
case KVM_REG_RISCV_ISA_EXT | KVM_RISCV_ISA_EXT_ZICBOZ:
case KVM_REG_RISCV_ISA_EXT | KVM_RISCV_ISA_EXT_ZBB:
case KVM_REG_RISCV_ISA_EXT | KVM_RISCV_ISA_EXT_SSAIA:
case KVM_REG_RISCV_ISA_EXT | KVM_RISCV_ISA_EXT_V:
case KVM_REG_RISCV_ISA_EXT | KVM_RISCV_ISA_EXT_SVNAPOT:
case KVM_REG_RISCV_ISA_EXT | KVM_RISCV_ISA_EXT_ZBA:
case KVM_REG_RISCV_ISA_EXT | KVM_RISCV_ISA_EXT_ZBS:
case KVM_REG_RISCV_ISA_EXT | KVM_RISCV_ISA_EXT_ZICNTR:
@ -50,12 +66,7 @@ static inline bool vcpu_has_ext(struct kvm_vcpu *vcpu, int ext)
unsigned long value;
ret = __vcpu_get_reg(vcpu, RISCV_ISA_EXT_REG(ext), &value);
if (ret) {
printf("Failed to get ext %d", ext);
return false;
}
return !!value;
return (ret) ? false : !!value;
}
void finalize_vcpu(struct kvm_vcpu *vcpu, struct vcpu_reg_list *c)
@ -506,10 +517,6 @@ static __u64 base_regs[] = {
KVM_REG_RISCV | KVM_REG_SIZE_U64 | KVM_REG_RISCV_TIMER | KVM_REG_RISCV_TIMER_REG(time),
KVM_REG_RISCV | KVM_REG_SIZE_U64 | KVM_REG_RISCV_TIMER | KVM_REG_RISCV_TIMER_REG(compare),
KVM_REG_RISCV | KVM_REG_SIZE_U64 | KVM_REG_RISCV_TIMER | KVM_REG_RISCV_TIMER_REG(state),
KVM_REG_RISCV | KVM_REG_SIZE_ULONG | KVM_REG_RISCV_ISA_EXT | KVM_RISCV_ISA_EXT_A,
KVM_REG_RISCV | KVM_REG_SIZE_ULONG | KVM_REG_RISCV_ISA_EXT | KVM_RISCV_ISA_EXT_C,
KVM_REG_RISCV | KVM_REG_SIZE_ULONG | KVM_REG_RISCV_ISA_EXT | KVM_RISCV_ISA_EXT_I,
KVM_REG_RISCV | KVM_REG_SIZE_ULONG | KVM_REG_RISCV_ISA_EXT | KVM_RISCV_ISA_EXT_M,
KVM_REG_RISCV | KVM_REG_SIZE_ULONG | KVM_REG_RISCV_SBI_EXT | KVM_REG_RISCV_SBI_SINGLE | KVM_RISCV_SBI_EXT_V01,
KVM_REG_RISCV | KVM_REG_SIZE_ULONG | KVM_REG_RISCV_SBI_EXT | KVM_REG_RISCV_SBI_SINGLE | KVM_RISCV_SBI_EXT_TIME,
KVM_REG_RISCV | KVM_REG_SIZE_ULONG | KVM_REG_RISCV_SBI_EXT | KVM_REG_RISCV_SBI_SINGLE | KVM_RISCV_SBI_EXT_IPI,