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Wed, 25 Sep 2019 11:46:12 -0700 (PDT) From: Richard Henderson To: qemu-devel@nongnu.org Subject: [PULL 15/16] cputlb: Pass retaddr to tb_invalidate_phys_page_fast Date: Wed, 25 Sep 2019 11:45:47 -0700 Message-Id: <20190925184548.30673-16-richard.henderson@linaro.org> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20190925184548.30673-1-richard.henderson@linaro.org> References: <20190925184548.30673-1-richard.henderson@linaro.org> MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: quoted-printable X-detected-operating-system: by eggs.gnu.org: Genre and OS details not recognized. X-Received-From: 2607:f8b0:4864:20::442 X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: peter.maydell@linaro.org Errors-To: qemu-devel-bounces+importer=patchew.org@nongnu.org Sender: "Qemu-devel" X-ZohoMail-DKIM: pass (identity @linaro.org) Rather than rely on cpu->mem_io_pc, pass retaddr down directly. Within tb_invalidate_phys_page_range__locked, the is_cpu_write_access parameter is non-zero exactly when retaddr would be non-zero, so that is a simple replacement. Recognize that current_tb_not_found is true only when mem_io_pc (and now retaddr) are also non-zero, so remove a redundant test. Reviewed-by: Alex Benn=C3=A9e Reviewed-by: David Hildenbrand Signed-off-by: Richard Henderson --- accel/tcg/translate-all.h | 3 ++- accel/tcg/cputlb.c | 6 +----- accel/tcg/translate-all.c | 39 +++++++++++++++++++-------------------- 3 files changed, 22 insertions(+), 26 deletions(-) diff --git a/accel/tcg/translate-all.h b/accel/tcg/translate-all.h index 31f2117188..135c1ea96a 100644 --- a/accel/tcg/translate-all.h +++ b/accel/tcg/translate-all.h @@ -27,7 +27,8 @@ struct page_collection *page_collection_lock(tb_page_addr= _t start, tb_page_addr_t end); void page_collection_unlock(struct page_collection *set); void tb_invalidate_phys_page_fast(struct page_collection *pages, - tb_page_addr_t start, int len); + tb_page_addr_t start, int len, + uintptr_t retaddr); void tb_invalidate_phys_page_range(tb_page_addr_t start, tb_page_addr_t en= d); void tb_check_watchpoint(CPUState *cpu); =20 diff --git a/accel/tcg/cputlb.c b/accel/tcg/cputlb.c index 4b24811ce7..defc8d5929 100644 --- a/accel/tcg/cputlb.c +++ b/accel/tcg/cputlb.c @@ -1094,11 +1094,7 @@ static void notdirty_write(CPUState *cpu, vaddr mem_= vaddr, unsigned size, if (!cpu_physical_memory_get_dirty_flag(ram_addr, DIRTY_MEMORY_CODE)) { struct page_collection *pages =3D page_collection_lock(ram_addr, ram_addr + size); - - /* We require mem_io_pc in tb_invalidate_phys_page_range. */ - cpu->mem_io_pc =3D retaddr; - - tb_invalidate_phys_page_fast(pages, ram_addr, size); + tb_invalidate_phys_page_fast(pages, ram_addr, size, retaddr); page_collection_unlock(pages); } =20 diff --git a/accel/tcg/translate-all.c b/accel/tcg/translate-all.c index de4b697163..db77fb221b 100644 --- a/accel/tcg/translate-all.c +++ b/accel/tcg/translate-all.c @@ -1889,7 +1889,7 @@ static void tb_invalidate_phys_page_range__locked(struct page_collection *pages, PageDesc *p, tb_page_addr_t start, tb_page_addr_t end, - int is_cpu_write_access) + uintptr_t retaddr) { TranslationBlock *tb; tb_page_addr_t tb_start, tb_end; @@ -1897,9 +1897,9 @@ tb_invalidate_phys_page_range__locked(struct page_col= lection *pages, #ifdef TARGET_HAS_PRECISE_SMC CPUState *cpu =3D current_cpu; CPUArchState *env =3D NULL; - int current_tb_not_found =3D is_cpu_write_access; + bool current_tb_not_found =3D retaddr !=3D 0; + bool current_tb_modified =3D false; TranslationBlock *current_tb =3D NULL; - int current_tb_modified =3D 0; target_ulong current_pc =3D 0; target_ulong current_cs_base =3D 0; uint32_t current_flags =3D 0; @@ -1931,24 +1931,21 @@ tb_invalidate_phys_page_range__locked(struct page_c= ollection *pages, if (!(tb_end <=3D start || tb_start >=3D end)) { #ifdef TARGET_HAS_PRECISE_SMC if (current_tb_not_found) { - current_tb_not_found =3D 0; - current_tb =3D NULL; - if (cpu->mem_io_pc) { - /* now we have a real cpu fault */ - current_tb =3D tcg_tb_lookup(cpu->mem_io_pc); - } + current_tb_not_found =3D false; + /* now we have a real cpu fault */ + current_tb =3D tcg_tb_lookup(retaddr); } if (current_tb =3D=3D tb && (tb_cflags(current_tb) & CF_COUNT_MASK) !=3D 1) { - /* If we are modifying the current TB, we must stop - its execution. We could be more precise by checking - that the modification is after the current PC, but it - would require a specialized function to partially - restore the CPU state */ - - current_tb_modified =3D 1; - cpu_restore_state_from_tb(cpu, current_tb, - cpu->mem_io_pc, true); + /* + * If we are modifying the current TB, we must stop + * its execution. We could be more precise by checking + * that the modification is after the current PC, but it + * would require a specialized function to partially + * restore the CPU state. + */ + current_tb_modified =3D true; + cpu_restore_state_from_tb(cpu, current_tb, retaddr, true); cpu_get_tb_cpu_state(env, ¤t_pc, ¤t_cs_base, ¤t_flags); } @@ -2042,7 +2039,8 @@ void tb_invalidate_phys_range(target_ulong start, tar= get_ulong end) * Call with all @pages in the range [@start, @start + len[ locked. */ void tb_invalidate_phys_page_fast(struct page_collection *pages, - tb_page_addr_t start, int len) + tb_page_addr_t start, int len, + uintptr_t retaddr) { PageDesc *p; =20 @@ -2069,7 +2067,8 @@ void tb_invalidate_phys_page_fast(struct page_collect= ion *pages, } } else { do_invalidate: - tb_invalidate_phys_page_range__locked(pages, p, start, start + len= , 1); + tb_invalidate_phys_page_range__locked(pages, p, start, start + len, + retaddr); } } #else --=20 2.17.1