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charset="utf-8" Content-Transfer-Encoding: quoted-printable Received-SPF: pass (zohomail.com: domain of gnu.org designates 209.51.188.17 as permitted sender) client-ip=209.51.188.17; envelope-from=qemu-devel-bounces+importer=patchew.org@nongnu.org; helo=lists.gnu.org; Received-SPF: pass client-ip=2607:f8b0:4864:20::430; envelope-from=richard.henderson@linaro.org; helo=mail-pf1-x430.google.com X-Spam_score_int: -20 X-Spam_score: -2.1 X-Spam_bar: -- X-Spam_report: (-2.1 / 5.0 requ) BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, RCVD_IN_DNSWL_NONE=-0.0001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001 autolearn=ham autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "Qemu-devel" Errors-To: qemu-devel-bounces+importer=patchew.org@nongnu.org X-ZohoMail-DKIM: pass (identity @linaro.org) X-ZM-MESSAGEID: 1666751401752100002 Use a constant target data allocation size for all pages. This will be necessary to reduce overhead of page tracking. Since TARGET_PAGE_DATA_SIZE is now required, we can use this to omit data tracking for targets that don't require it. Reviewed-by: Alex Benn=C3=A9e Signed-off-by: Richard Henderson --- include/exec/cpu-all.h | 9 ++++----- target/arm/cpu.h | 8 ++++++++ target/arm/internals.h | 4 ---- accel/tcg/translate-all.c | 8 ++++++-- target/arm/mte_helper.c | 3 +-- 5 files changed, 19 insertions(+), 13 deletions(-) diff --git a/include/exec/cpu-all.h b/include/exec/cpu-all.h index 16b7df41bf..854adc4ac2 100644 --- a/include/exec/cpu-all.h +++ b/include/exec/cpu-all.h @@ -281,19 +281,18 @@ void page_reset_target_data(target_ulong start, targe= t_ulong end); int page_check_range(target_ulong start, target_ulong len, int flags); =20 /** - * page_alloc_target_data(address, size) + * page_alloc_target_data(address) * @address: guest virtual address - * @size: size of data to allocate * - * Allocate @size bytes of out-of-band data to associate with the - * guest page at @address. If the page is not mapped, NULL will + * Allocate TARGET_PAGE_DATA_SIZE bytes of out-of-band data to associate + * with the guest page at @address. If the page is not mapped, NULL will * be returned. If there is existing data associated with @address, * no new memory will be allocated. * * The memory will be freed when the guest page is deallocated, * e.g. with the munmap system call. */ -void *page_alloc_target_data(target_ulong address, size_t size); +void *page_alloc_target_data(target_ulong address); =20 /** * page_get_target_data(address) diff --git a/target/arm/cpu.h b/target/arm/cpu.h index 64fc03214c..db9ec6a038 100644 --- a/target/arm/cpu.h +++ b/target/arm/cpu.h @@ -3410,6 +3410,14 @@ extern const uint64_t pred_esz_masks[5]; #define PAGE_MTE PAGE_TARGET_2 #define PAGE_TARGET_STICKY PAGE_MTE =20 +/* We associate one allocation tag per 16 bytes, the minimum. */ +#define LOG2_TAG_GRANULE 4 +#define TAG_GRANULE (1 << LOG2_TAG_GRANULE) + +#ifdef CONFIG_USER_ONLY +#define TARGET_PAGE_DATA_SIZE (TARGET_PAGE_SIZE >> (LOG2_TAG_GRANULE + 1)) +#endif + #ifdef TARGET_TAGGED_ADDRESSES /** * cpu_untagged_addr: diff --git a/target/arm/internals.h b/target/arm/internals.h index c3c3920ded..b26c9ca17b 100644 --- a/target/arm/internals.h +++ b/target/arm/internals.h @@ -1164,10 +1164,6 @@ void arm_log_exception(CPUState *cs); */ #define GMID_EL1_BS 6 =20 -/* We associate one allocation tag per 16 bytes, the minimum. */ -#define LOG2_TAG_GRANULE 4 -#define TAG_GRANULE (1 << LOG2_TAG_GRANULE) - /* * SVE predicates are 1/8 the size of SVE vectors, and cannot use * the same simd_desc() encoding due to restrictions on size. diff --git a/accel/tcg/translate-all.c b/accel/tcg/translate-all.c index 4ed75a13e1..64a2601f9f 100644 --- a/accel/tcg/translate-all.c +++ b/accel/tcg/translate-all.c @@ -2271,6 +2271,7 @@ void page_set_flags(target_ulong start, target_ulong = end, int flags) =20 void page_reset_target_data(target_ulong start, target_ulong end) { +#ifdef TARGET_PAGE_DATA_SIZE target_ulong addr, len; =20 /* @@ -2293,15 +2294,17 @@ void page_reset_target_data(target_ulong start, tar= get_ulong end) g_free(p->target_data); p->target_data =3D NULL; } +#endif } =20 +#ifdef TARGET_PAGE_DATA_SIZE void *page_get_target_data(target_ulong address) { PageDesc *p =3D page_find(address >> TARGET_PAGE_BITS); return p ? p->target_data : NULL; } =20 -void *page_alloc_target_data(target_ulong address, size_t size) +void *page_alloc_target_data(target_ulong address) { PageDesc *p =3D page_find(address >> TARGET_PAGE_BITS); void *ret =3D NULL; @@ -2309,11 +2312,12 @@ void *page_alloc_target_data(target_ulong address, = size_t size) if (p->flags & PAGE_VALID) { ret =3D p->target_data; if (!ret) { - p->target_data =3D ret =3D g_malloc0(size); + p->target_data =3D ret =3D g_malloc0(TARGET_PAGE_DATA_SIZE); } } return ret; } +#endif /* TARGET_PAGE_DATA_SIZE */ =20 int page_check_range(target_ulong start, target_ulong len, int flags) { diff --git a/target/arm/mte_helper.c b/target/arm/mte_helper.c index e85208339e..a9c5fc2cb2 100644 --- a/target/arm/mte_helper.c +++ b/target/arm/mte_helper.c @@ -96,8 +96,7 @@ static uint8_t *allocation_tag_mem(CPUARMState *env, int = ptr_mmu_idx, =20 tags =3D page_get_target_data(clean_ptr); if (tags =3D=3D NULL) { - size_t alloc_size =3D TARGET_PAGE_SIZE >> (LOG2_TAG_GRANULE + 1); - tags =3D page_alloc_target_data(clean_ptr, alloc_size); + tags =3D page_alloc_target_data(clean_ptr); assert(tags !=3D NULL); } =20 --=20 2.34.1