mirror of https://github.com/xemu-project/xemu.git
target/arm: Remove unused allocation_tag_mem() argument
The allocation_tag_mem() function takes an argument tag_size, but it never uses it. Remove the argument. In mte_probe_int() in particular this also lets us delete the code computing the value we were passing in. Signed-off-by: Peter Maydell <peter.maydell@linaro.org> Reviewed-by: Richard Henderson <richard.henderson@linaro.org> Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
This commit is contained in:
Peter Maydell
parent
3039b090f2
commit
0b5ad31d2a
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@ -57,7 +57,6 @@ static int choose_nonexcluded_tag(int tag, int offset, uint16_t exclude)
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* @ptr_access: the access to use for the virtual address
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* @ptr_size: the number of bytes in the normal memory access
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* @tag_access: the access to use for the tag memory
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* @tag_size: the number of bytes in the tag memory access
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* @ra: the return address for exception handling
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*
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* Our tag memory is formatted as a sequence of little-endian nibbles.
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@ -69,15 +68,12 @@ static int choose_nonexcluded_tag(int tag, int offset, uint16_t exclude)
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* a pointer to the corresponding tag byte. Exit with exception if the
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* virtual address is not accessible for @ptr_access.
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*
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* The @ptr_size and @tag_size values may not have an obvious relation
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* due to the alignment of @ptr, and the number of tag checks required.
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*
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* If there is no tag storage corresponding to @ptr, return NULL.
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*/
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static uint8_t *allocation_tag_mem(CPUARMState *env, int ptr_mmu_idx,
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uint64_t ptr, MMUAccessType ptr_access,
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int ptr_size, MMUAccessType tag_access,
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int tag_size, uintptr_t ra)
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uintptr_t ra)
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{
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#ifdef CONFIG_USER_ONLY
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uint64_t clean_ptr = useronly_clean_ptr(ptr);
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@ -275,7 +271,7 @@ uint64_t HELPER(ldg)(CPUARMState *env, uint64_t ptr, uint64_t xt)
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/* Trap if accessing an invalid page. */
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mem = allocation_tag_mem(env, mmu_idx, ptr, MMU_DATA_LOAD, 1,
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MMU_DATA_LOAD, 1, GETPC());
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MMU_DATA_LOAD, GETPC());
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/* Load if page supports tags. */
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if (mem) {
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@ -329,7 +325,7 @@ static inline void do_stg(CPUARMState *env, uint64_t ptr, uint64_t xt,
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/* Trap if accessing an invalid page. */
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mem = allocation_tag_mem(env, mmu_idx, ptr, MMU_DATA_STORE, TAG_GRANULE,
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MMU_DATA_STORE, 1, ra);
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MMU_DATA_STORE, ra);
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/* Store if page supports tags. */
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if (mem) {
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@ -372,10 +368,10 @@ static inline void do_st2g(CPUARMState *env, uint64_t ptr, uint64_t xt,
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if (ptr & TAG_GRANULE) {
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/* Two stores unaligned mod TAG_GRANULE*2 -- modify two bytes. */
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mem1 = allocation_tag_mem(env, mmu_idx, ptr, MMU_DATA_STORE,
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TAG_GRANULE, MMU_DATA_STORE, 1, ra);
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TAG_GRANULE, MMU_DATA_STORE, ra);
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mem2 = allocation_tag_mem(env, mmu_idx, ptr + TAG_GRANULE,
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MMU_DATA_STORE, TAG_GRANULE,
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MMU_DATA_STORE, 1, ra);
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MMU_DATA_STORE, ra);
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/* Store if page(s) support tags. */
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if (mem1) {
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@ -387,7 +383,7 @@ static inline void do_st2g(CPUARMState *env, uint64_t ptr, uint64_t xt,
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} else {
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/* Two stores aligned mod TAG_GRANULE*2 -- modify one byte. */
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mem1 = allocation_tag_mem(env, mmu_idx, ptr, MMU_DATA_STORE,
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2 * TAG_GRANULE, MMU_DATA_STORE, 1, ra);
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2 * TAG_GRANULE, MMU_DATA_STORE, ra);
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if (mem1) {
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tag |= tag << 4;
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qatomic_set(mem1, tag);
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@ -435,8 +431,7 @@ uint64_t HELPER(ldgm)(CPUARMState *env, uint64_t ptr)
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/* Trap if accessing an invalid page. */
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tag_mem = allocation_tag_mem(env, mmu_idx, ptr, MMU_DATA_LOAD,
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gm_bs_bytes, MMU_DATA_LOAD,
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gm_bs_bytes / (2 * TAG_GRANULE), ra);
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gm_bs_bytes, MMU_DATA_LOAD, ra);
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/* The tag is squashed to zero if the page does not support tags. */
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if (!tag_mem) {
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@ -495,8 +490,7 @@ void HELPER(stgm)(CPUARMState *env, uint64_t ptr, uint64_t val)
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/* Trap if accessing an invalid page. */
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tag_mem = allocation_tag_mem(env, mmu_idx, ptr, MMU_DATA_STORE,
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gm_bs_bytes, MMU_DATA_LOAD,
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gm_bs_bytes / (2 * TAG_GRANULE), ra);
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gm_bs_bytes, MMU_DATA_LOAD, ra);
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/*
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* Tag store only happens if the page support tags,
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@ -552,7 +546,7 @@ void HELPER(stzgm_tags)(CPUARMState *env, uint64_t ptr, uint64_t val)
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ptr &= -dcz_bytes;
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mem = allocation_tag_mem(env, mmu_idx, ptr, MMU_DATA_STORE, dcz_bytes,
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MMU_DATA_STORE, tag_bytes, ra);
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MMU_DATA_STORE, ra);
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if (mem) {
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int tag_pair = (val & 0xf) * 0x11;
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memset(mem, tag_pair, tag_bytes);
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@ -732,8 +726,7 @@ static int mte_probe_int(CPUARMState *env, uint32_t desc, uint64_t ptr,
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int mmu_idx, ptr_tag, bit55;
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uint64_t ptr_last, prev_page, next_page;
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uint64_t tag_first, tag_last;
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uint64_t tag_byte_first, tag_byte_last;
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uint32_t sizem1, tag_count, tag_size, n, c;
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uint32_t sizem1, tag_count, n, c;
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uint8_t *mem1, *mem2;
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MMUAccessType type;
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@ -763,19 +756,14 @@ static int mte_probe_int(CPUARMState *env, uint32_t desc, uint64_t ptr,
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tag_last = QEMU_ALIGN_DOWN(ptr_last, TAG_GRANULE);
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tag_count = ((tag_last - tag_first) / TAG_GRANULE) + 1;
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/* Round the bounds to twice the tag granule, and compute the bytes. */
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tag_byte_first = QEMU_ALIGN_DOWN(ptr, 2 * TAG_GRANULE);
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tag_byte_last = QEMU_ALIGN_DOWN(ptr_last, 2 * TAG_GRANULE);
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/* Locate the page boundaries. */
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prev_page = ptr & TARGET_PAGE_MASK;
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next_page = prev_page + TARGET_PAGE_SIZE;
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if (likely(tag_last - prev_page < TARGET_PAGE_SIZE)) {
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/* Memory access stays on one page. */
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tag_size = ((tag_byte_last - tag_byte_first) / (2 * TAG_GRANULE)) + 1;
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mem1 = allocation_tag_mem(env, mmu_idx, ptr, type, sizem1 + 1,
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MMU_DATA_LOAD, tag_size, ra);
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MMU_DATA_LOAD, ra);
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if (!mem1) {
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return 1;
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}
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@ -783,14 +771,12 @@ static int mte_probe_int(CPUARMState *env, uint32_t desc, uint64_t ptr,
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n = checkN(mem1, ptr & TAG_GRANULE, ptr_tag, tag_count);
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} else {
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/* Memory access crosses to next page. */
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tag_size = (next_page - tag_byte_first) / (2 * TAG_GRANULE);
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mem1 = allocation_tag_mem(env, mmu_idx, ptr, type, next_page - ptr,
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MMU_DATA_LOAD, tag_size, ra);
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MMU_DATA_LOAD, ra);
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tag_size = ((tag_byte_last - next_page) / (2 * TAG_GRANULE)) + 1;
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mem2 = allocation_tag_mem(env, mmu_idx, next_page, type,
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ptr_last - next_page + 1,
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MMU_DATA_LOAD, tag_size, ra);
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MMU_DATA_LOAD, ra);
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/*
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* Perform all of the comparisons.
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@ -918,7 +904,7 @@ uint64_t HELPER(mte_check_zva)(CPUARMState *env, uint32_t desc, uint64_t ptr)
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mmu_idx = FIELD_EX32(desc, MTEDESC, MIDX);
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(void) probe_write(env, ptr, 1, mmu_idx, ra);
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mem = allocation_tag_mem(env, mmu_idx, align_ptr, MMU_DATA_STORE,
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dcz_bytes, MMU_DATA_LOAD, tag_bytes, ra);
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dcz_bytes, MMU_DATA_LOAD, ra);
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if (!mem) {
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goto done;
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}
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