On Wed May 8, 2024 at 10:15 AM AEST, BALATON Zoltan wrote:
> The ppc_hash32_pp_prot() function in mmu-hash32.c is the same as
> pp_check() in mmu_common.c, merge these to remove duplicated code.
> Define the common function in internal.h as static lnline otherwise
> exporting the function from mmu-hash32.c would stop the compiler
> inlining it which results in slightly lower performance.
Reviewed-by: Nicholas Piggin <npig...@gmail.com>
>
> Signed-off-by: BALATON Zoltan <bala...@eik.bme.hu>
> ---
> target/ppc/internal.h | 35 ++++++++++++++++++++++++++++++++
> target/ppc/mmu-hash32.c | 45 -----------------------------------------
> target/ppc/mmu_common.c | 44 ++--------------------------------------
> 3 files changed, 37 insertions(+), 87 deletions(-)
>
> diff --git a/target/ppc/internal.h b/target/ppc/internal.h
> index 4a90dd2584..46176c4711 100644
> --- a/target/ppc/internal.h
> +++ b/target/ppc/internal.h
> @@ -256,6 +256,41 @@ static inline int prot_for_access_type(MMUAccessType
> access_type)
> #ifndef CONFIG_USER_ONLY
>
> /* PowerPC MMU emulation */
> +static inline int ppc_hash32_pp_prot(int key, int pp, int nx)
> +{
> + int prot;
> +
> + if (key == 0) {
> + switch (pp) {
> + case 0x0:
> + case 0x1:
> + case 0x2:
> + prot = PAGE_READ | PAGE_WRITE;
> + break;
> + case 0x3:
> + prot = PAGE_READ;
> + break;
> + default:
> + g_assert_not_reached();
> + }
> + } else {
> + switch (pp) {
> + case 0x0:
> + prot = 0;
> + break;
> + case 0x1:
> + case 0x3:
> + prot = PAGE_READ;
> + break;
> + case 0x2:
> + prot = PAGE_READ | PAGE_WRITE;
> + break;
> + default:
> + g_assert_not_reached();
> + }
> + }
> + return nx ? prot : prot | PAGE_EXEC;
> +}
>
> bool ppc_xlate(PowerPCCPU *cpu, vaddr eaddr, MMUAccessType access_type,
> hwaddr *raddrp, int *psizep, int *protp,
> diff --git a/target/ppc/mmu-hash32.c b/target/ppc/mmu-hash32.c
> index 6dfedab11d..960751a50e 100644
> --- a/target/ppc/mmu-hash32.c
> +++ b/target/ppc/mmu-hash32.c
> @@ -43,51 +43,6 @@ struct mmu_ctx_hash32 {
> int key; /* Access key */
> };
>
> -static int ppc_hash32_pp_prot(int key, int pp, int nx)
> -{
> - int prot;
> -
> - if (key == 0) {
> - switch (pp) {
> - case 0x0:
> - case 0x1:
> - case 0x2:
> - prot = PAGE_READ | PAGE_WRITE;
> - break;
> -
> - case 0x3:
> - prot = PAGE_READ;
> - break;
> -
> - default:
> - abort();
> - }
> - } else {
> - switch (pp) {
> - case 0x0:
> - prot = 0;
> - break;
> -
> - case 0x1:
> - case 0x3:
> - prot = PAGE_READ;
> - break;
> -
> - case 0x2:
> - prot = PAGE_READ | PAGE_WRITE;
> - break;
> -
> - default:
> - abort();
> - }
> - }
> - if (nx == 0) {
> - prot |= PAGE_EXEC;
> - }
> -
> - return prot;
> -}
> -
> static int ppc_hash32_pte_prot(int mmu_idx,
> target_ulong sr, ppc_hash_pte32_t pte)
> {
> diff --git a/target/ppc/mmu_common.c b/target/ppc/mmu_common.c
> index d92c9607b8..87cac12d68 100644
> --- a/target/ppc/mmu_common.c
> +++ b/target/ppc/mmu_common.c
> @@ -76,44 +76,6 @@ void ppc_store_sdr1(CPUPPCState *env, target_ulong value)
>
> /*****************************************************************************/
> /* PowerPC MMU emulation */
>
> -static int pp_check(int key, int pp, int nx)
> -{
> - int access;
> -
> - /* Compute access rights */
> - access = 0;
> - if (key == 0) {
> - switch (pp) {
> - case 0x0:
> - case 0x1:
> - case 0x2:
> - access |= PAGE_WRITE;
> - /* fall through */
> - case 0x3:
> - access |= PAGE_READ;
> - break;
> - }
> - } else {
> - switch (pp) {
> - case 0x0:
> - access = 0;
> - break;
> - case 0x1:
> - case 0x3:
> - access = PAGE_READ;
> - break;
> - case 0x2:
> - access = PAGE_READ | PAGE_WRITE;
> - break;
> - }
> - }
> - if (nx == 0) {
> - access |= PAGE_EXEC;
> - }
> -
> - return access;
> -}
> -
> static int check_prot(int prot, MMUAccessType access_type)
> {
> return prot & prot_for_access_type(access_type) ? 0 : -2;
> @@ -141,7 +103,7 @@ static int ppc6xx_tlb_pte_check(mmu_ctx_t *ctx,
> target_ulong pte0,
> MMUAccessType access_type)
> {
> target_ulong ptem, mmask;
> - int access, ret, pteh, ptev, pp;
> + int ret, pteh, ptev, pp;
>
> ret = -1;
> /* Check validity and table match */
> @@ -160,11 +122,9 @@ static int ppc6xx_tlb_pte_check(mmu_ctx_t *ctx,
> target_ulong pte0,
> return -3;
> }
> }
> - /* Compute access rights */
> - access = pp_check(ctx->key, pp, ctx->nx);
> /* Keep the matching PTE information */
> ctx->raddr = pte1;
> - ctx->prot = access;
> + ctx->prot = ppc_hash32_pp_prot(ctx->key, pp, ctx->nx);
> ret = check_prot(ctx->prot, access_type);
> if (ret == 0) {
> /* Access granted */
