Re: [PATCH 08/10] target/ppc: Restrict KVM-specific field from ArchCPU

[Cédric Le Goater]

Hello Philippe

On 4/5/23 18:04, Philippe Mathieu-Daudé wrote:
> The 'kvm_sw_tlb' field shouldn't be accessed when KVM is not available.
>
> Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org>
> ---
>   target/ppc/cpu.h        | 2 ++
>   target/ppc/mmu_common.c | 4 ++++
>   2 files changed, 6 insertions(+)
>
> diff --git a/target/ppc/cpu.h b/target/ppc/cpu.h
> index 557d736dab..0ec3957397 100644
> --- a/target/ppc/cpu.h
> +++ b/target/ppc/cpu.h
> @@ -1148,7 +1148,9 @@ struct CPUArchState {
>       int tlb_type;    /* Type of TLB we're dealing with */
>       ppc_tlb_t tlb;   /* TLB is optional. Allocate them only if needed */
>       bool tlb_dirty;  /* Set to non-zero when modifying TLB */

'tlb_dirty' was part of the same commit 93dd5e852c ("kvm: ppc: booke206:
use MMU API"). So we might as well include it in the #ifdef section.

Thanks,

C.

> +#ifdef CONFIG_KVM
>       bool kvm_sw_tlb; /* non-zero if KVM SW TLB API is active */
> +#endif /* CONFIG_KVM */
>       uint32_t tlb_need_flush; /* Delayed flush needed */
>   #define TLB_NEED_LOCAL_FLUSH   0x1
>   #define TLB_NEED_GLOBAL_FLUSH  0x2
> diff --git a/target/ppc/mmu_common.c b/target/ppc/mmu_common.c
> index 7235a4befe..21843c69f6 100644
> --- a/target/ppc/mmu_common.c
> +++ b/target/ppc/mmu_common.c
> @@ -917,10 +917,12 @@ static void mmubooke_dump_mmu(CPUPPCState *env)
>       ppcemb_tlb_t *entry;
>       int i;
>   
> +#ifdef CONFIG_KVM
>       if (kvm_enabled() && !env->kvm_sw_tlb) {
>           qemu_printf("Cannot access KVM TLB\n");
>           return;
>       }
> +#endif
>   
>       qemu_printf("\nTLB:\n");
>       qemu_printf("Effective          Physical           Size PID   Prot     "
> @@ -1008,10 +1010,12 @@ static void mmubooke206_dump_mmu(CPUPPCState *env)
>       int offset = 0;
>       int i;
>   
> +#ifdef CONFIG_KVM
>       if (kvm_enabled() && !env->kvm_sw_tlb) {
>           qemu_printf("Cannot access KVM TLB\n");
>           return;
>       }
> +#endif
>   
>       for (i = 0; i < BOOKE206_MAX_TLBN; i++) {
>           int size = booke206_tlb_size(env, i);