From patchwork Sat Apr 22 13:03:23 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Weiwei Li X-Patchwork-Id: 13220995 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from lists.gnu.org (lists.gnu.org [209.51.188.17]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id B3562C7618E for ; Sat, 22 Apr 2023 13:06:12 +0000 (UTC) Received: from localhost ([::1] helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1pqCuq-0007vU-7v; Sat, 22 Apr 2023 09:04:36 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1pqCuh-0007nE-Sc; Sat, 22 Apr 2023 09:04:27 -0400 Received: from smtp80.cstnet.cn ([159.226.251.80] helo=cstnet.cn) by eggs.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1pqCud-0004Un-LB; Sat, 22 Apr 2023 09:04:27 -0400 Received: from localhost.localdomain (unknown [180.165.241.15]) by APP-01 (Coremail) with SMTP id qwCowAAHTJxI20NkLKGxCA--.21573S3; Sat, 22 Apr 2023 21:04:10 +0800 (CST) From: Weiwei Li To: qemu-riscv@nongnu.org, qemu-devel@nongnu.org Cc: palmer@dabbelt.com, alistair.francis@wdc.com, bin.meng@windriver.com, dbarboza@ventanamicro.com, zhiwei_liu@linux.alibaba.com, richard.henderson@linaro.org, wangjunqiang@iscas.ac.cn, lazyparser@gmail.com, Weiwei Li Subject: [PATCH v4 1/7] target/riscv: Update pmp_get_tlb_size() Date: Sat, 22 Apr 2023 21:03:23 +0800 Message-Id: <20230422130329.23555-2-liweiwei@iscas.ac.cn> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20230422130329.23555-1-liweiwei@iscas.ac.cn> References: <20230422130329.23555-1-liweiwei@iscas.ac.cn> MIME-Version: 1.0 X-CM-TRANSID: qwCowAAHTJxI20NkLKGxCA--.21573S3 X-Coremail-Antispam: 1UD129KBjvJXoWxtrW7Aw4UJw43KrWfKry5CFg_yoW7Ar4rpr WxCrW7GrZ7K39xJ3W3JF4DXF15Aw4fKr4UCa97WFZYka15G3yrAr1qkrWa9ry8GayDurWY 9FWqyFn8CF4UXaUanT9S1TB71UUUUUUqnTZGkaVYY2UrUUUUjbIjqfuFe4nvWSU5nxnvy2 9KBjDU0xBIdaVrnRJUUUBE14x267AKxVW5JVWrJwAFc2x0x2IEx4CE42xK8VAvwI8IcIk0 rVWrJVCq3wAFIxvE14AKwVWUJVWUGwA2048vs2IY020E87I2jVAFwI0_Jr4l82xGYIkIc2 x26xkF7I0E14v26r4j6ryUM28lY4IEw2IIxxk0rwA2F7IY1VAKz4vEj48ve4kI8wA2z4x0 Y4vE2Ix0cI8IcVAFwI0_Ar0_tr1l84ACjcxK6xIIjxv20xvEc7CjxVAFwI0_Gr1j6F4UJw A2z4x0Y4vEx4A2jsIE14v26rxl6s0DM28EF7xvwVC2z280aVCY1x0267AKxVW0oVCq3wAS 0I0E0xvYzxvE52x082IY62kv0487Mc02F40EFcxC0VAKzVAqx4xG6I80ewAv7VC0I7IYx2 IY67AKxVWUJVWUGwAv7VC2z280aVAFwI0_Jr0_Gr1lOx8S6xCaFVCjc4AY6r1j6r4UM4x0 Y48IcxkI7VAKI48JM4x0x7Aq67IIx4CEVc8vx2IErcIFxwACI402YVCY1x02628vn2kIc2 xKxwCF04k20xvY0x0EwIxGrwCFx2IqxVCFs4IE7xkEbVWUJVW8JwC20s026c02F40E14v2 6r1j6r18MI8I3I0E7480Y4vE14v26r106r1rMI8E67AF67kF1VAFwI0_Jw0_GFylIxkGc2 Ij64vIr41lIxAIcVC0I7IYx2IY67AKxVWUJVWUCwCI42IY6xIIjxv20xvEc7CjxVAFwI0_ Gr0_Cr1lIxAIcVCF04k26cxKx2IYs7xG6r1j6r1xMIIF0xvEx4A2jsIE14v26r1j6r4UMI IF0xvEx4A2jsIEc7CjxVAFwI0_Gr0_Gr1UYxBIdaVFxhVjvjDU0xZFpf9x0JU2_M3UUUUU = X-Originating-IP: [180.165.241.15] X-CM-SenderInfo: 5olzvxxzhlqxpvfd2hldfou0/ Received-SPF: pass client-ip=159.226.251.80; envelope-from=liweiwei@iscas.ac.cn; helo=cstnet.cn X-Spam_score_int: -18 X-Spam_score: -1.9 X-Spam_bar: - X-Spam_report: (-1.9 / 5.0 requ) BAYES_00=-1.9, RCVD_IN_MSPIKE_H2=-0.001, SPF_HELO_PASS=-0.001, SPF_PASS=-0.001, T_SCC_BODY_TEXT_LINE=-0.01 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: , Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org PMP entries before the matched PMP entry (including the matched PMP entry) may only cover partial of the TLB page, which may make different regions in that page allow different RWX privs, such as for PMP0 (0x80000008~0x8000000F, R) and PMP1 (0x80001000~0x80001FFF, RWX) write access to 0x80000000 will match PMP1. However we cannot cache the translation result in the TLB since this will make the write access to 0x80000008 bypass the check of PMP0. So we should check all of them instead of the matched PMP entry in pmp_get_tlb_size() and set the tlb_size to 1 in this case. Set tlb_size to TARGET_PAGE_SIZE if PMP is not support or there is no PMP rules. Signed-off-by: Weiwei Li Signed-off-by: Junqiang Wang Reviewed-by: LIU Zhiwei --- target/riscv/cpu_helper.c | 7 ++--- target/riscv/pmp.c | 64 ++++++++++++++++++++++++++++++--------- target/riscv/pmp.h | 3 +- 3 files changed, 52 insertions(+), 22 deletions(-) diff --git a/target/riscv/cpu_helper.c b/target/riscv/cpu_helper.c index 433ea529b0..075fc0538a 100644 --- a/target/riscv/cpu_helper.c +++ b/target/riscv/cpu_helper.c @@ -703,11 +703,8 @@ static int get_physical_address_pmp(CPURISCVState *env, int *prot, } *prot = pmp_priv_to_page_prot(pmp_priv); - if ((tlb_size != NULL) && pmp_index != MAX_RISCV_PMPS) { - target_ulong tlb_sa = addr & ~(TARGET_PAGE_SIZE - 1); - target_ulong tlb_ea = tlb_sa + TARGET_PAGE_SIZE - 1; - - *tlb_size = pmp_get_tlb_size(env, pmp_index, tlb_sa, tlb_ea); + if (tlb_size != NULL) { + *tlb_size = pmp_get_tlb_size(env, addr); } return TRANSLATE_SUCCESS; diff --git a/target/riscv/pmp.c b/target/riscv/pmp.c index 1f5aca42e8..ad20a319c1 100644 --- a/target/riscv/pmp.c +++ b/target/riscv/pmp.c @@ -601,28 +601,62 @@ target_ulong mseccfg_csr_read(CPURISCVState *env) } /* - * Calculate the TLB size if the start address or the end address of - * PMP entry is presented in the TLB page. + * Calculate the TLB size. If the PMP rules may make different regions in + * the TLB page of 'addr' allow different RWX privs, set the size to 1 + * (to make the translation result uncached in the TLB and only be used for + * a single translation). Set the size to TARGET_PAGE_SIZE otherwise. */ -target_ulong pmp_get_tlb_size(CPURISCVState *env, int pmp_index, - target_ulong tlb_sa, target_ulong tlb_ea) +target_ulong pmp_get_tlb_size(CPURISCVState *env, target_ulong addr) { - target_ulong pmp_sa = env->pmp_state.addr[pmp_index].sa; - target_ulong pmp_ea = env->pmp_state.addr[pmp_index].ea; + target_ulong pmp_sa; + target_ulong pmp_ea; + target_ulong tlb_sa = addr & ~(TARGET_PAGE_SIZE - 1); + target_ulong tlb_ea = tlb_sa + TARGET_PAGE_SIZE - 1; + int i; - if (pmp_sa <= tlb_sa && pmp_ea >= tlb_ea) { + /* + * If PMP is not supported or there is no PMP rule, which means the allowed + * RWX privs of the page will not affected by PMP or PMP will provide the + * same option (disallow accesses or allow default RWX privs) for all + * addresses, set the size to TARGET_PAGE_SIZE. + */ + if (!riscv_cpu_cfg(env)->pmp || !pmp_get_num_rules(env)) { return TARGET_PAGE_SIZE; - } else { + } + + for (i = 0; i < MAX_RISCV_PMPS; i++) { + if (pmp_get_a_field(env->pmp_state.pmp[i].cfg_reg) == PMP_AMATCH_OFF) { + continue; + } + + pmp_sa = env->pmp_state.addr[i].sa; + pmp_ea = env->pmp_state.addr[i].ea; + /* - * At this point we have a tlb_size that is the smallest possible size - * That fits within a TARGET_PAGE_SIZE and the PMP region. - * - * If the size is less then TARGET_PAGE_SIZE we drop the size to 1. - * This means the result isn't cached in the TLB and is only used for - * a single translation. + * Only the first PMP entry that covers (whole or partial of) the TLB + * page really matters: + * If it can cover the whole page, set the size to TARGET_PAGE_SIZE. + * The following PMP entries have lower priority and will not affect + * the allowed RWX privs of the page. + * If it only cover partial of the TLB page, set the size to 1 since + * the allowed RWX privs for the covered region may be different from + * other region of the page. */ - return 1; + if (pmp_sa <= tlb_sa && pmp_ea >= tlb_ea) { + return TARGET_PAGE_SIZE; + } else if ((pmp_sa >= tlb_sa && pmp_sa <= tlb_ea) || + (pmp_ea >= tlb_sa && pmp_ea <= tlb_ea)) { + return 1; + } } + + /* + * If no PMP entry covers any region of the TLB page, similar to the above + * case that there is no PMP rule, PMP will provide the same option + * (disallow accesses or allow default RWX privs) for the whole page, + * set the size to TARGET_PAGE_SIZE. + */ + return TARGET_PAGE_SIZE; } /* diff --git a/target/riscv/pmp.h b/target/riscv/pmp.h index b296ea1fc6..0a7e24750b 100644 --- a/target/riscv/pmp.h +++ b/target/riscv/pmp.h @@ -76,8 +76,7 @@ int pmp_hart_has_privs(CPURISCVState *env, target_ulong addr, target_ulong size, pmp_priv_t privs, pmp_priv_t *allowed_privs, target_ulong mode); -target_ulong pmp_get_tlb_size(CPURISCVState *env, int pmp_index, - target_ulong tlb_sa, target_ulong tlb_ea); +target_ulong pmp_get_tlb_size(CPURISCVState *env, target_ulong addr); void pmp_update_rule_addr(CPURISCVState *env, uint32_t pmp_index); void pmp_update_rule_nums(CPURISCVState *env); uint32_t pmp_get_num_rules(CPURISCVState *env); From patchwork Sat Apr 22 13:03:24 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Weiwei Li X-Patchwork-Id: 13220993 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from lists.gnu.org (lists.gnu.org [209.51.188.17]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 3B10FC7618E for ; Sat, 22 Apr 2023 13:06:09 +0000 (UTC) Received: from localhost ([::1] helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1pqCuj-0007oL-Iy; Sat, 22 Apr 2023 09:04:29 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1pqCuh-0007mr-JZ; Sat, 22 Apr 2023 09:04:27 -0400 Received: from smtp80.cstnet.cn ([159.226.251.80] helo=cstnet.cn) by eggs.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1pqCud-0004Up-Cp; Sat, 22 Apr 2023 09:04:27 -0400 Received: from localhost.localdomain (unknown [180.165.241.15]) by APP-01 (Coremail) with SMTP id qwCowAAHTJxI20NkLKGxCA--.21573S4; Sat, 22 Apr 2023 21:04:10 +0800 (CST) From: Weiwei Li To: qemu-riscv@nongnu.org, qemu-devel@nongnu.org Cc: palmer@dabbelt.com, alistair.francis@wdc.com, bin.meng@windriver.com, dbarboza@ventanamicro.com, zhiwei_liu@linux.alibaba.com, richard.henderson@linaro.org, wangjunqiang@iscas.ac.cn, lazyparser@gmail.com, Weiwei Li Subject: [PATCH v4 2/7] target/riscv: Move pmp_get_tlb_size apart from get_physical_address_pmp Date: Sat, 22 Apr 2023 21:03:24 +0800 Message-Id: <20230422130329.23555-3-liweiwei@iscas.ac.cn> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20230422130329.23555-1-liweiwei@iscas.ac.cn> References: <20230422130329.23555-1-liweiwei@iscas.ac.cn> MIME-Version: 1.0 X-CM-TRANSID: qwCowAAHTJxI20NkLKGxCA--.21573S4 X-Coremail-Antispam: 1UD129KBjvJXoWxAF48KFWkJw18uF1DGr1Dtrb_yoW5GFy5pr Z3Crs7Wa1kKFZa9ayIvr1UAFW5CFnrtrWUW3WkGwsY9Fs0q345C3Wq934agFs7GrWkZws0 kw4qyFy8CF15XFUanT9S1TB71UUUUUUqnTZGkaVYY2UrUUUUjbIjqfuFe4nvWSU5nxnvy2 9KBjDU0xBIdaVrnRJUUUBE14x267AKxVWrJVCq3wAFc2x0x2IEx4CE42xK8VAvwI8IcIk0 rVWrJVCq3wAFIxvE14AKwVWUJVWUGwA2048vs2IY020E87I2jVAFwI0_Jryl82xGYIkIc2 x26xkF7I0E14v26ryj6s0DM28lY4IEw2IIxxk0rwA2F7IY1VAKz4vEj48ve4kI8wA2z4x0 Y4vE2Ix0cI8IcVAFwI0_Ar0_tr1l84ACjcxK6xIIjxv20xvEc7CjxVAFwI0_Gr1j6F4UJw A2z4x0Y4vEx4A2jsIE14v26rxl6s0DM28EF7xvwVC2z280aVCY1x0267AKxVW0oVCq3wAS 0I0E0xvYzxvE52x082IY62kv0487Mc02F40EFcxC0VAKzVAqx4xG6I80ewAv7VC0I7IYx2 IY67AKxVWUJVWUGwAv7VC2z280aVAFwI0_Jr0_Gr1lOx8S6xCaFVCjc4AY6r1j6r4UM4x0 Y48IcxkI7VAKI48JM4x0x7Aq67IIx4CEVc8vx2IErcIFxwACI402YVCY1x02628vn2kIc2 xKxwCF04k20xvY0x0EwIxGrwCFx2IqxVCFs4IE7xkEbVWUJVW8JwC20s026c02F40E14v2 6r1j6r18MI8I3I0E7480Y4vE14v26r106r1rMI8E67AF67kF1VAFwI0_Jw0_GFylIxkGc2 Ij64vIr41lIxAIcVC0I7IYx2IY67AKxVWUJVWUCwCI42IY6xIIjxv20xvEc7CjxVAFwI0_ Gr0_Cr1lIxAIcVCF04k26cxKx2IYs7xG6r1j6r1xMIIF0xvEx4A2jsIE14v26r1j6r4UMI IF0xvEx4A2jsIEc7CjxVAFwI0_Gr0_Gr1UYxBIdaVFxhVjvjDU0xZFpf9x0JUHbyAUUUUU = X-Originating-IP: [180.165.241.15] X-CM-SenderInfo: 5olzvxxzhlqxpvfd2hldfou0/ Received-SPF: pass client-ip=159.226.251.80; envelope-from=liweiwei@iscas.ac.cn; helo=cstnet.cn X-Spam_score_int: -18 X-Spam_score: -1.9 X-Spam_bar: - X-Spam_report: (-1.9 / 5.0 requ) BAYES_00=-1.9, RCVD_IN_MSPIKE_H2=-0.001, SPF_HELO_PASS=-0.001, SPF_PASS=-0.001, T_SCC_BODY_TEXT_LINE=-0.01 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: , Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org pmp_get_tlb_size can be separated from get_physical_address_pmp and is only needed when ret == TRANSLATE_SUCCESS. Signed-off-by: Weiwei Li Signed-off-by: Junqiang Wang Reviewed-by: LIU Zhiwei --- target/riscv/cpu_helper.c | 16 ++++++---------- 1 file changed, 6 insertions(+), 10 deletions(-) diff --git a/target/riscv/cpu_helper.c b/target/riscv/cpu_helper.c index 075fc0538a..83c9699a6d 100644 --- a/target/riscv/cpu_helper.c +++ b/target/riscv/cpu_helper.c @@ -676,14 +676,11 @@ void riscv_cpu_set_mode(CPURISCVState *env, target_ulong newpriv) * * @env: CPURISCVState * @prot: The returned protection attributes - * @tlb_size: TLB page size containing addr. It could be modified after PMP - * permission checking. NULL if not set TLB page for addr. * @addr: The physical address to be checked permission * @access_type: The type of MMU access * @mode: Indicates current privilege level. */ -static int get_physical_address_pmp(CPURISCVState *env, int *prot, - target_ulong *tlb_size, hwaddr addr, +static int get_physical_address_pmp(CPURISCVState *env, int *prot, hwaddr addr, int size, MMUAccessType access_type, int mode) { @@ -703,9 +700,6 @@ static int get_physical_address_pmp(CPURISCVState *env, int *prot, } *prot = pmp_priv_to_page_prot(pmp_priv); - if (tlb_size != NULL) { - *tlb_size = pmp_get_tlb_size(env, addr); - } return TRANSLATE_SUCCESS; } @@ -905,7 +899,7 @@ restart: } int pmp_prot; - int pmp_ret = get_physical_address_pmp(env, &pmp_prot, NULL, pte_addr, + int pmp_ret = get_physical_address_pmp(env, &pmp_prot, pte_addr, sizeof(target_ulong), MMU_DATA_LOAD, PRV_S); if (pmp_ret != TRANSLATE_SUCCESS) { @@ -1300,8 +1294,9 @@ bool riscv_cpu_tlb_fill(CPUState *cs, vaddr address, int size, prot &= prot2; if (ret == TRANSLATE_SUCCESS) { - ret = get_physical_address_pmp(env, &prot_pmp, &tlb_size, pa, + ret = get_physical_address_pmp(env, &prot_pmp, pa, size, access_type, mode); + tlb_size = pmp_get_tlb_size(env, pa); qemu_log_mask(CPU_LOG_MMU, "%s PMP address=" HWADDR_FMT_plx " ret %d prot" @@ -1333,8 +1328,9 @@ bool riscv_cpu_tlb_fill(CPUState *cs, vaddr address, int size, __func__, address, ret, pa, prot); if (ret == TRANSLATE_SUCCESS) { - ret = get_physical_address_pmp(env, &prot_pmp, &tlb_size, pa, + ret = get_physical_address_pmp(env, &prot_pmp, pa, size, access_type, mode); + tlb_size = pmp_get_tlb_size(env, pa); qemu_log_mask(CPU_LOG_MMU, "%s PMP address=" HWADDR_FMT_plx " ret %d prot" From patchwork Sat Apr 22 13:03:25 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Weiwei Li X-Patchwork-Id: 13220989 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from lists.gnu.org (lists.gnu.org [209.51.188.17]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id AA4ACC6FD18 for ; Sat, 22 Apr 2023 13:05:29 +0000 (UTC) Received: from localhost ([::1] helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1pqCuj-0007nk-Hy; Sat, 22 Apr 2023 09:04:29 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1pqCug-0007mc-6Z; Sat, 22 Apr 2023 09:04:26 -0400 Received: from smtp80.cstnet.cn ([159.226.251.80] helo=cstnet.cn) by eggs.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1pqCud-0004Ut-By; Sat, 22 Apr 2023 09:04:25 -0400 Received: from localhost.localdomain (unknown [180.165.241.15]) by APP-01 (Coremail) with SMTP id qwCowAAHTJxI20NkLKGxCA--.21573S5; Sat, 22 Apr 2023 21:04:11 +0800 (CST) From: Weiwei Li To: qemu-riscv@nongnu.org, qemu-devel@nongnu.org Cc: palmer@dabbelt.com, alistair.francis@wdc.com, bin.meng@windriver.com, dbarboza@ventanamicro.com, zhiwei_liu@linux.alibaba.com, richard.henderson@linaro.org, wangjunqiang@iscas.ac.cn, lazyparser@gmail.com, Weiwei Li Subject: [PATCH v4 3/7] target/riscv: Flush TLB when pmpaddr is updated Date: Sat, 22 Apr 2023 21:03:25 +0800 Message-Id: <20230422130329.23555-4-liweiwei@iscas.ac.cn> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20230422130329.23555-1-liweiwei@iscas.ac.cn> References: <20230422130329.23555-1-liweiwei@iscas.ac.cn> MIME-Version: 1.0 X-CM-TRANSID: qwCowAAHTJxI20NkLKGxCA--.21573S5 X-Coremail-Antispam: 1UD129KBjvdXoW7WryUKFy7XF4UtFy3ZFWUJwb_yoWfWwc_GF Z2qF4kW34UXa4F9Fy8AFs5Gw10krykGanI9a97Jrs3Ca45Kr4fX3ZaqaykJ34YkFZxWrn3 ZrnrJr43CrsxWjkaLaAFLSUrUUUUUb8apTn2vfkv8UJUUUU8Yxn0WfASr-VFAUDa7-sFnT 9fnUUIcSsGvfJTRUUUb6AFF20E14v26rWj6s0DM7CY07I20VC2zVCF04k26cxKx2IYs7xG 6rWj6s0DM7CIcVAFz4kK6r1j6r18M28IrcIa0xkI8VA2jI8067AKxVWUWwA2048vs2IY02 0Ec7CjxVAFwI0_Xr0E3s1l8cAvFVAK0II2c7xJM28CjxkF64kEwVA0rcxSw2x7M28EF7xv wVC0I7IYx2IY67AKxVW7JVWDJwA2z4x0Y4vE2Ix0cI8IcVCY1x0267AKxVW8Jr0_Cr1UM2 8EF7xvwVC2z280aVAFwI0_GcCE3s1l84ACjcxK6I8E87Iv6xkF7I0E14v26rxl6s0DM2AI xVAIcxkEcVAq07x20xvEncxIr21l5I8CrVACY4xI64kE6c02F40Ex7xfMcIj6xIIjxv20x vE14v26r1j6r18McIj6I8E87Iv67AKxVWUJVW8JwAm72CE4IkC6x0Yz7v_Jr0_Gr1lF7xv r2IYc2Ij64vIr41lF7I21c0EjII2zVCS5cI20VAGYxC7M4IIrI8v6xkF7I0E8cxan2IY04 v7MxAIw28IcxkI7VAKI48JMxC20s026xCaFVCjc4AY6r1j6r4UMI8I3I0E5I8CrVAFwI0_ Jr0_Jr4lx2IqxVCjr7xvwVAFwI0_JrI_JrWlx4CE17CEb7AF67AKxVWUtVW8ZwCIc40Y0x 0EwIxGrwCI42IY6xIIjxv20xvE14v26r1j6r1xMIIF0xvE2Ix0cI8IcVCY1x0267AKxVW8 JVWxJwCI42IY6xAIw20EY4v20xvaj40_Jr0_JF4lIxAIcVC2z280aVAFwI0_Jr0_Gr1lIx AIcVC2z280aVCY1x0267AKxVW8JVW8JrUvcSsGvfC2KfnxnUUI43ZEXa7VUbJ73DUUUUU= = X-Originating-IP: [180.165.241.15] X-CM-SenderInfo: 5olzvxxzhlqxpvfd2hldfou0/ Received-SPF: pass client-ip=159.226.251.80; envelope-from=liweiwei@iscas.ac.cn; helo=cstnet.cn X-Spam_score_int: -18 X-Spam_score: -1.9 X-Spam_bar: - X-Spam_report: (-1.9 / 5.0 requ) BAYES_00=-1.9, RCVD_IN_MSPIKE_H2=-0.001, SPF_HELO_PASS=-0.001, SPF_PASS=-0.001, T_SCC_BODY_TEXT_LINE=-0.01 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: , Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org TLB should be flushed not only for pmpcfg csr changes, but also for pmpaddr csr changes. Signed-off-by: Weiwei Li Signed-off-by: Junqiang Wang Reviewed-by: Alistair Francis Reviewed-by: LIU Zhiwei --- target/riscv/pmp.c | 1 + 1 file changed, 1 insertion(+) diff --git a/target/riscv/pmp.c b/target/riscv/pmp.c index ad20a319c1..9ae3bfea22 100644 --- a/target/riscv/pmp.c +++ b/target/riscv/pmp.c @@ -537,6 +537,7 @@ void pmpaddr_csr_write(CPURISCVState *env, uint32_t addr_index, if (!pmp_is_locked(env, addr_index)) { env->pmp_state.pmp[addr_index].addr_reg = val; pmp_update_rule(env, addr_index); + tlb_flush(env_cpu(env)); } else { qemu_log_mask(LOG_GUEST_ERROR, "ignoring pmpaddr write - locked\n"); From patchwork Sat Apr 22 13:03:26 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Weiwei Li X-Patchwork-Id: 13220990 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from lists.gnu.org (lists.gnu.org [209.51.188.17]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 0CFC9C6FD18 for ; Sat, 22 Apr 2023 13:05:33 +0000 (UTC) Received: from localhost ([::1] helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1pqCuq-0007wU-U7; Sat, 22 Apr 2023 09:04:36 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1pqCui-0007o0-Tq; Sat, 22 Apr 2023 09:04:28 -0400 Received: from smtp80.cstnet.cn ([159.226.251.80] helo=cstnet.cn) by eggs.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1pqCud-0004Uw-Kw; Sat, 22 Apr 2023 09:04:28 -0400 Received: from localhost.localdomain (unknown [180.165.241.15]) by APP-01 (Coremail) with SMTP id qwCowAAHTJxI20NkLKGxCA--.21573S6; Sat, 22 Apr 2023 21:04:11 +0800 (CST) From: Weiwei Li To: qemu-riscv@nongnu.org, qemu-devel@nongnu.org Cc: palmer@dabbelt.com, alistair.francis@wdc.com, bin.meng@windriver.com, dbarboza@ventanamicro.com, zhiwei_liu@linux.alibaba.com, richard.henderson@linaro.org, wangjunqiang@iscas.ac.cn, lazyparser@gmail.com, Weiwei Li Subject: [PATCH v4 4/7] target/riscv: Flush TLB only when pmpcfg/pmpaddr really changes Date: Sat, 22 Apr 2023 21:03:26 +0800 Message-Id: <20230422130329.23555-5-liweiwei@iscas.ac.cn> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20230422130329.23555-1-liweiwei@iscas.ac.cn> References: <20230422130329.23555-1-liweiwei@iscas.ac.cn> MIME-Version: 1.0 X-CM-TRANSID: qwCowAAHTJxI20NkLKGxCA--.21573S6 X-Coremail-Antispam: 1UD129KBjvJXoWxGFWUCF48uFy7trykuFWUXFb_yoW5Cr47pr WSkFyIgrW5tasFgayfJF1UXF15Cw1rKryxKrWDCF1F9F43ur48CF1qg3sFkr1DGayxZrWY vayUZr1UXF42vFJanT9S1TB71UUUUUUqnTZGkaVYY2UrUUUUjbIjqfuFe4nvWSU5nxnvy2 9KBjDU0xBIdaVrnRJUUUPF14x267AKxVWrJVCq3wAFc2x0x2IEx4CE42xK8VAvwI8IcIk0 rVWrJVCq3wAFIxvE14AKwVWUJVWUGwA2048vs2IY020E87I2jVAFwI0_JF0E3s1l82xGYI kIc2x26xkF7I0E14v26ryj6s0DM28lY4IEw2IIxxk0rwA2F7IY1VAKz4vEj48ve4kI8wA2 z4x0Y4vE2Ix0cI8IcVAFwI0_Ar0_tr1l84ACjcxK6xIIjxv20xvEc7CjxVAFwI0_Gr1j6F 4UJwA2z4x0Y4vEx4A2jsIE14v26rxl6s0DM28EF7xvwVC2z280aVCY1x0267AKxVW0oVCq 3wAS0I0E0xvYzxvE52x082IY62kv0487Mc02F40EFcxC0VAKzVAqx4xG6I80ewAv7VC0I7 IYx2IY67AKxVWUJVWUGwAv7VC2z280aVAFwI0_Jr0_Gr1lOx8S6xCaFVCjc4AY6r1j6r4U M4x0Y48IcxkI7VAKI48JM4x0x7Aq67IIx4CEVc8vx2IErcIFxwACI402YVCY1x02628vn2 kIc2xKxwCF04k20xvY0x0EwIxGrwCFx2IqxVCFs4IE7xkEbVWUJVW8JwC20s026c02F40E 14v26r1j6r18MI8I3I0E7480Y4vE14v26r106r1rMI8E67AF67kF1VAFwI0_Jw0_GFylIx kGc2Ij64vIr41lIxAIcVC0I7IYx2IY67AKxVWUJVWUCwCI42IY6xIIjxv20xvEc7CjxVAF wI0_Cr0_Gr1UMIIF0xvE42xK8VAvwI8IcIk0rVWUJVWUCwCI42IY6I8E87Iv67AKxVWUJV W8JwCI42IY6I8E87Iv6xkF7I0E14v26r4j6r4UJbIYCTnIWIevJa73UjIFyTuYvjfUOBTY UUUUU X-Originating-IP: [180.165.241.15] X-CM-SenderInfo: 5olzvxxzhlqxpvfd2hldfou0/ Received-SPF: pass client-ip=159.226.251.80; envelope-from=liweiwei@iscas.ac.cn; helo=cstnet.cn X-Spam_score_int: -18 X-Spam_score: -1.9 X-Spam_bar: - X-Spam_report: (-1.9 / 5.0 requ) BAYES_00=-1.9, RCVD_IN_MSPIKE_H2=-0.001, SPF_HELO_PASS=-0.001, SPF_PASS=-0.001, T_SCC_BODY_TEXT_LINE=-0.01 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: , Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org TLB needn't be flushed when pmpcfg/pmpaddr don't changes. Signed-off-by: Weiwei Li Signed-off-by: Junqiang Wang Reviewed-by: Alistair Francis Reviewed-by: LIU Zhiwei --- target/riscv/pmp.c | 24 ++++++++++++++++-------- 1 file changed, 16 insertions(+), 8 deletions(-) diff --git a/target/riscv/pmp.c b/target/riscv/pmp.c index 9ae3bfea22..0cef9e3e1d 100644 --- a/target/riscv/pmp.c +++ b/target/riscv/pmp.c @@ -26,7 +26,7 @@ #include "trace.h" #include "exec/exec-all.h" -static void pmp_write_cfg(CPURISCVState *env, uint32_t addr_index, +static bool pmp_write_cfg(CPURISCVState *env, uint32_t addr_index, uint8_t val); static uint8_t pmp_read_cfg(CPURISCVState *env, uint32_t addr_index); static void pmp_update_rule(CPURISCVState *env, uint32_t pmp_index); @@ -83,7 +83,7 @@ static inline uint8_t pmp_read_cfg(CPURISCVState *env, uint32_t pmp_index) * Accessor to set the cfg reg for a specific PMP/HART * Bounds checks and relevant lock bit. */ -static void pmp_write_cfg(CPURISCVState *env, uint32_t pmp_index, uint8_t val) +static bool pmp_write_cfg(CPURISCVState *env, uint32_t pmp_index, uint8_t val) { if (pmp_index < MAX_RISCV_PMPS) { bool locked = true; @@ -119,14 +119,17 @@ static void pmp_write_cfg(CPURISCVState *env, uint32_t pmp_index, uint8_t val) if (locked) { qemu_log_mask(LOG_GUEST_ERROR, "ignoring pmpcfg write - locked\n"); - } else { + } else if (env->pmp_state.pmp[pmp_index].cfg_reg != val) { env->pmp_state.pmp[pmp_index].cfg_reg = val; pmp_update_rule(env, pmp_index); + return true; } } else { qemu_log_mask(LOG_GUEST_ERROR, "ignoring pmpcfg write - out of bounds\n"); } + + return false; } static void pmp_decode_napot(target_ulong a, target_ulong *sa, @@ -477,16 +480,19 @@ void pmpcfg_csr_write(CPURISCVState *env, uint32_t reg_index, int i; uint8_t cfg_val; int pmpcfg_nums = 2 << riscv_cpu_mxl(env); + bool modified = false; trace_pmpcfg_csr_write(env->mhartid, reg_index, val); for (i = 0; i < pmpcfg_nums; i++) { cfg_val = (val >> 8 * i) & 0xff; - pmp_write_cfg(env, (reg_index * 4) + i, cfg_val); + modified |= pmp_write_cfg(env, (reg_index * 4) + i, cfg_val); } /* If PMP permission of any addr has been changed, flush TLB pages. */ - tlb_flush(env_cpu(env)); + if (modified) { + tlb_flush(env_cpu(env)); + } } @@ -535,9 +541,11 @@ void pmpaddr_csr_write(CPURISCVState *env, uint32_t addr_index, } if (!pmp_is_locked(env, addr_index)) { - env->pmp_state.pmp[addr_index].addr_reg = val; - pmp_update_rule(env, addr_index); - tlb_flush(env_cpu(env)); + if (env->pmp_state.pmp[addr_index].addr_reg != val) { + env->pmp_state.pmp[addr_index].addr_reg = val; + pmp_update_rule(env, addr_index); + tlb_flush(env_cpu(env)); + } } else { qemu_log_mask(LOG_GUEST_ERROR, "ignoring pmpaddr write - locked\n"); From patchwork Sat Apr 22 13:03:27 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Weiwei Li X-Patchwork-Id: 13220991 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from lists.gnu.org (lists.gnu.org [209.51.188.17]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 945C6C7618E for ; Sat, 22 Apr 2023 13:05:49 +0000 (UTC) Received: from localhost ([::1] helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1pqCun-0007qM-0r; Sat, 22 Apr 2023 09:04:33 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1pqCuh-0007n2-PG; Sat, 22 Apr 2023 09:04:27 -0400 Received: from smtp80.cstnet.cn ([159.226.251.80] helo=cstnet.cn) by eggs.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1pqCud-0004VF-EU; Sat, 22 Apr 2023 09:04:27 -0400 Received: from localhost.localdomain (unknown [180.165.241.15]) by APP-01 (Coremail) with SMTP id qwCowAAHTJxI20NkLKGxCA--.21573S7; Sat, 22 Apr 2023 21:04:12 +0800 (CST) From: Weiwei Li To: qemu-riscv@nongnu.org, qemu-devel@nongnu.org Cc: palmer@dabbelt.com, alistair.francis@wdc.com, bin.meng@windriver.com, dbarboza@ventanamicro.com, zhiwei_liu@linux.alibaba.com, richard.henderson@linaro.org, wangjunqiang@iscas.ac.cn, lazyparser@gmail.com, Weiwei Li Subject: [PATCH v4 5/7] accel/tcg: Uncache the host address for instruction fetch when tlb size < 1 Date: Sat, 22 Apr 2023 21:03:27 +0800 Message-Id: <20230422130329.23555-6-liweiwei@iscas.ac.cn> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20230422130329.23555-1-liweiwei@iscas.ac.cn> References: <20230422130329.23555-1-liweiwei@iscas.ac.cn> MIME-Version: 1.0 X-CM-TRANSID: qwCowAAHTJxI20NkLKGxCA--.21573S7 X-Coremail-Antispam: 1UD129KBjvdXoWrZr1xGw4UXw1xKr4ruryUWrg_yoWkKwb_ua 4xJrykXw1rtF92gr45J3WakryrC347CF4YgryxK34fAa4YywsrKas7KrnxGw1UWa95Wry7 Ca4DJw18Ar1j9jkaLaAFLSUrUUUUUb8apTn2vfkv8UJUUUU8Yxn0WfASr-VFAUDa7-sFnT 9fnUUIcSsGvfJTRUUUbDAFF20E14v26rWj6s0DM7CY07I20VC2zVCF04k26cxKx2IYs7xG 6rWj6s0DM7CIcVAFz4kK6r1j6r18M28IrcIa0xkI8VA2jI8067AKxVWUAVCq3wA2048vs2 IY020Ec7CjxVAFwI0_Xr0E3s1l8cAvFVAK0II2c7xJM28CjxkF64kEwVA0rcxSw2x7M28E F7xvwVC0I7IYx2IY67AKxVW7JVWDJwA2z4x0Y4vE2Ix0cI8IcVCY1x0267AKxVW8Jr0_Cr 1UM28EF7xvwVC2z280aVAFwI0_GcCE3s1l84ACjcxK6I8E87Iv6xkF7I0E14v26rxl6s0D M2AIxVAIcxkEcVAq07x20xvEncxIr21l5I8CrVACY4xI64kE6c02F40Ex7xfMcIj6xIIjx v20xvE14v26r1j6r18McIj6I8E87Iv67AKxVWUJVW8JwAm72CE4IkC6x0Yz7v_Jr0_Gr1l F7xvr2IYc2Ij64vIr41lF7I21c0EjII2zVCS5cI20VAGYxC7M4IIrI8v6xkF7I0E8cxan2 IY04v7MxAIw28IcxkI7VAKI48JMxC20s026xCaFVCjc4AY6r1j6r4UMI8I3I0E5I8CrVAF wI0_Jr0_Jr4lx2IqxVCjr7xvwVAFwI0_JrI_JrWlx4CE17CEb7AF67AKxVWUtVW8ZwCIc4 0Y0x0EwIxGrwCI42IY6xIIjxv20xvE14v26r1I6r4UMIIF0xvE2Ix0cI8IcVCY1x0267AK xVWxJVW8Jr1lIxAIcVCF04k26cxKx2IYs7xG6r1j6r1xMIIF0xvEx4A2jsIE14v26r1j6r 4UMIIF0xvEx4A2jsIEc7CjxVAFwI0_Gr0_Gr1UYxBIdaVFxhVjvjDU0xZFpf9x0JUQSdkU UUUU= X-Originating-IP: [180.165.241.15] X-CM-SenderInfo: 5olzvxxzhlqxpvfd2hldfou0/ Received-SPF: pass client-ip=159.226.251.80; envelope-from=liweiwei@iscas.ac.cn; helo=cstnet.cn X-Spam_score_int: -18 X-Spam_score: -1.9 X-Spam_bar: - X-Spam_report: (-1.9 / 5.0 requ) BAYES_00=-1.9, RCVD_IN_MSPIKE_H2=-0.001, SPF_HELO_PASS=-0.001, SPF_PASS=-0.001, T_SCC_BODY_TEXT_LINE=-0.01 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: , Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org When PMP entry overlap part of the page, we'll set the tlb_size to 1, which will make the address in tlb entry set with TLB_INVALID_MASK, and the next access will again go through tlb_fill.However, this way will not work in tb_gen_code() => get_page_addr_code_hostp(): the TLB host address will be cached, and the following instructions can use this host address directly which may lead to the bypass of PMP related check. Resolves: https://gitlab.com/qemu-project/qemu/-/issues/1542. Signed-off-by: Weiwei Li Signed-off-by: Junqiang Wang Reviewed-by: LIU Zhiwei Reviewed-by: Richard Henderson --- accel/tcg/cputlb.c | 5 +++++ 1 file changed, 5 insertions(+) diff --git a/accel/tcg/cputlb.c b/accel/tcg/cputlb.c index e984a98dc4..efa0cb67c9 100644 --- a/accel/tcg/cputlb.c +++ b/accel/tcg/cputlb.c @@ -1696,6 +1696,11 @@ tb_page_addr_t get_page_addr_code_hostp(CPUArchState *env, target_ulong addr, if (p == NULL) { return -1; } + + if (full->lg_page_size < TARGET_PAGE_BITS) { + return -1; + } + if (hostp) { *hostp = p; } From patchwork Sat Apr 22 13:03:28 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Weiwei Li X-Patchwork-Id: 13220994 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from lists.gnu.org (lists.gnu.org [209.51.188.17]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id D1A89C77B76 for ; Sat, 22 Apr 2023 13:06:09 +0000 (UTC) Received: from localhost ([::1] helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1pqCuq-0007wE-Qr; Sat, 22 Apr 2023 09:04:36 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1pqCui-0007o1-Uc; Sat, 22 Apr 2023 09:04:28 -0400 Received: from smtp80.cstnet.cn ([159.226.251.80] helo=cstnet.cn) by eggs.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1pqCud-0004VA-N6; Sat, 22 Apr 2023 09:04:28 -0400 Received: from localhost.localdomain (unknown [180.165.241.15]) by APP-01 (Coremail) with SMTP id qwCowAAHTJxI20NkLKGxCA--.21573S8; Sat, 22 Apr 2023 21:04:13 +0800 (CST) From: Weiwei Li To: qemu-riscv@nongnu.org, qemu-devel@nongnu.org Cc: palmer@dabbelt.com, alistair.francis@wdc.com, bin.meng@windriver.com, dbarboza@ventanamicro.com, zhiwei_liu@linux.alibaba.com, richard.henderson@linaro.org, wangjunqiang@iscas.ac.cn, lazyparser@gmail.com, Weiwei Li Subject: [PATCH v4 6/7] target/riscv: Make the short cut really work in pmp_hart_has_privs Date: Sat, 22 Apr 2023 21:03:28 +0800 Message-Id: <20230422130329.23555-7-liweiwei@iscas.ac.cn> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20230422130329.23555-1-liweiwei@iscas.ac.cn> References: <20230422130329.23555-1-liweiwei@iscas.ac.cn> MIME-Version: 1.0 X-CM-TRANSID: qwCowAAHTJxI20NkLKGxCA--.21573S8 X-Coremail-Antispam: 1UD129KBjvdXoWrAr1UXFW5AryrXw4kAF1UZFb_yoWxXrX_GF WIqF48W34qq3W0vFyUAF98XF1UWrykWrn09FsxKr43KFyUurW3Z34vgFykGryj939rWr93 uwn7ArW7GrnI9jkaLaAFLSUrUUUUUb8apTn2vfkv8UJUUUU8Yxn0WfASr-VFAUDa7-sFnT 9fnUUIcSsGvfJTRUUUbDAFF20E14v26rWj6s0DM7CY07I20VC2zVCF04k26cxKx2IYs7xG 6rWj6s0DM7CIcVAFz4kK6r1j6r18M28IrcIa0xkI8VA2jI8067AKxVWUAVCq3wA2048vs2 IY020Ec7CjxVAFwI0_Xr0E3s1l8cAvFVAK0II2c7xJM28CjxkF64kEwVA0rcxSw2x7M28E F7xvwVC0I7IYx2IY67AKxVWDJVCq3wA2z4x0Y4vE2Ix0cI8IcVCY1x0267AKxVW8Jr0_Cr 1UM28EF7xvwVC2z280aVAFwI0_GcCE3s1l84ACjcxK6I8E87Iv6xkF7I0E14v26rxl6s0D M2AIxVAIcxkEcVAq07x20xvEncxIr21l5I8CrVACY4xI64kE6c02F40Ex7xfMcIj6xIIjx v20xvE14v26r1j6r18McIj6I8E87Iv67AKxVWUJVW8JwAm72CE4IkC6x0Yz7v_Jr0_Gr1l F7xvr2IYc2Ij64vIr41lF7I21c0EjII2zVCS5cI20VAGYxC7M4IIrI8v6xkF7I0E8cxan2 IY04v7MxAIw28IcxkI7VAKI48JMxC20s026xCaFVCjc4AY6r1j6r4UMI8I3I0E5I8CrVAF wI0_Jr0_Jr4lx2IqxVCjr7xvwVAFwI0_JrI_JrWlx4CE17CEb7AF67AKxVWUtVW8ZwCIc4 0Y0x0EwIxGrwCI42IY6xIIjxv20xvE14v26r1I6r4UMIIF0xvE2Ix0cI8IcVCY1x0267AK xVWxJVW8Jr1lIxAIcVCF04k26cxKx2IYs7xG6r1j6r1xMIIF0xvEx4A2jsIE14v26r1j6r 4UMIIF0xvEx4A2jsIEc7CjxVAFwI0_Gr0_Gr1UYxBIdaVFxhVjvjDU0xZFpf9x0JUQSdkU UUUU= X-Originating-IP: [180.165.241.15] X-CM-SenderInfo: 5olzvxxzhlqxpvfd2hldfou0/ Received-SPF: pass client-ip=159.226.251.80; envelope-from=liweiwei@iscas.ac.cn; helo=cstnet.cn X-Spam_score_int: -18 X-Spam_score: -1.9 X-Spam_bar: - X-Spam_report: (-1.9 / 5.0 requ) BAYES_00=-1.9, RCVD_IN_MSPIKE_H2=-0.001, SPF_HELO_PASS=-0.001, SPF_PASS=-0.001, T_SCC_BODY_TEXT_LINE=-0.01 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: , Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Return the result directly for short cut, since we needn't do the following check on the PMP entries if there is no PMP rules. Signed-off-by: Weiwei Li Signed-off-by: Junqiang Wang --- target/riscv/pmp.c | 1 + 1 file changed, 1 insertion(+) diff --git a/target/riscv/pmp.c b/target/riscv/pmp.c index 0cef9e3e1d..b0f1b0a715 100644 --- a/target/riscv/pmp.c +++ b/target/riscv/pmp.c @@ -319,6 +319,7 @@ int pmp_hart_has_privs(CPURISCVState *env, target_ulong addr, allowed_privs, mode)) { ret = MAX_RISCV_PMPS; } + return ret; } if (size == 0) { From patchwork Sat Apr 22 13:03:29 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Weiwei Li X-Patchwork-Id: 13220996 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from lists.gnu.org (lists.gnu.org [209.51.188.17]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id CD9C7C6FD18 for ; Sat, 22 Apr 2023 13:06:37 +0000 (UTC) Received: from localhost ([::1] helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1pqCur-0007yA-Ld; Sat, 22 Apr 2023 09:04:37 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1pqCui-0007nz-Ta; Sat, 22 Apr 2023 09:04:28 -0400 Received: from smtp80.cstnet.cn ([159.226.251.80] helo=cstnet.cn) by eggs.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1pqCud-0004VD-Ld; Sat, 22 Apr 2023 09:04:28 -0400 Received: from localhost.localdomain (unknown [180.165.241.15]) by APP-01 (Coremail) with SMTP id qwCowAAHTJxI20NkLKGxCA--.21573S9; Sat, 22 Apr 2023 21:04:13 +0800 (CST) From: Weiwei Li To: qemu-riscv@nongnu.org, qemu-devel@nongnu.org Cc: palmer@dabbelt.com, alistair.francis@wdc.com, bin.meng@windriver.com, dbarboza@ventanamicro.com, zhiwei_liu@linux.alibaba.com, richard.henderson@linaro.org, wangjunqiang@iscas.ac.cn, lazyparser@gmail.com, Weiwei Li Subject: [PATCH v4 7/7] target/riscv: Separate pmp_update_rule() in pmpcfg_csr_write Date: Sat, 22 Apr 2023 21:03:29 +0800 Message-Id: <20230422130329.23555-8-liweiwei@iscas.ac.cn> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20230422130329.23555-1-liweiwei@iscas.ac.cn> References: <20230422130329.23555-1-liweiwei@iscas.ac.cn> MIME-Version: 1.0 X-CM-TRANSID: qwCowAAHTJxI20NkLKGxCA--.21573S9 X-Coremail-Antispam: 1UD129KBjvJXoW7Kr1fWw45KF1DZF48Aw18Zrb_yoW8WFWUpr WxCFWIgr45t34qg34fJF1Uurs8Ca1rKFn2qw4kAF1F9a1rua4rCF1qg3sF9F45GaySvrWY 9a4UZr4UZF40vFJanT9S1TB71UUUUUUqnTZGkaVYY2UrUUUUjbIjqfuFe4nvWSU5nxnvy2 9KBjDU0xBIdaVrnRJUUUPF14x267AKxVWrJVCq3wAFc2x0x2IEx4CE42xK8VAvwI8IcIk0 rVWrJVCq3wAFIxvE14AKwVWUJVWUGwA2048vs2IY020E87I2jVAFwI0_JF0E3s1l82xGYI kIc2x26xkF7I0E14v26ryj6s0DM28lY4IEw2IIxxk0rwA2F7IY1VAKz4vEj48ve4kI8wA2 z4x0Y4vE2Ix0cI8IcVAFwI0_tr0E3s1l84ACjcxK6xIIjxv20xvEc7CjxVAFwI0_Gr1j6F 4UJwA2z4x0Y4vEx4A2jsIE14v26rxl6s0DM28EF7xvwVC2z280aVCY1x0267AKxVW0oVCq 3wAS0I0E0xvYzxvE52x082IY62kv0487Mc02F40EFcxC0VAKzVAqx4xG6I80ewAv7VC0I7 IYx2IY67AKxVWUJVWUGwAv7VC2z280aVAFwI0_Jr0_Gr1lOx8S6xCaFVCjc4AY6r1j6r4U M4x0Y48IcxkI7VAKI48JM4x0x7Aq67IIx4CEVc8vx2IErcIFxwACI402YVCY1x02628vn2 kIc2xKxwCF04k20xvY0x0EwIxGrwCFx2IqxVCFs4IE7xkEbVWUJVW8JwC20s026c02F40E 14v26r1j6r18MI8I3I0E7480Y4vE14v26r106r1rMI8E67AF67kF1VAFwI0_Jw0_GFylIx kGc2Ij64vIr41lIxAIcVC0I7IYx2IY67AKxVWUCVW8JwCI42IY6xIIjxv20xvEc7CjxVAF wI0_Cr0_Gr1UMIIF0xvE42xK8VAvwI8IcIk0rVWUJVWUCwCI42IY6I8E87Iv67AKxVWUJV W8JwCI42IY6I8E87Iv6xkF7I0E14v26r4j6r4UJbIYCTnIWIevJa73UjIFyTuYvjfUOBTY UUUUU X-Originating-IP: [180.165.241.15] X-CM-SenderInfo: 5olzvxxzhlqxpvfd2hldfou0/ Received-SPF: pass client-ip=159.226.251.80; envelope-from=liweiwei@iscas.ac.cn; helo=cstnet.cn X-Spam_score_int: -18 X-Spam_score: -1.9 X-Spam_bar: - X-Spam_report: (-1.9 / 5.0 requ) BAYES_00=-1.9, RCVD_IN_MSPIKE_H2=-0.001, SPF_HELO_PASS=-0.001, SPF_PASS=-0.001, T_SCC_BODY_TEXT_LINE=-0.01 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: , Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Use pmp_update_rule_addr() and pmp_update_rule_nums() separately to update rule nums only once for each pmpcfg_csr_write. Then we can also move tlb_flush into pmp_update_rule_nums(). Signed-off-by: Weiwei Li Signed-off-by: Junqiang Wang --- target/riscv/pmp.c | 7 ++++--- 1 file changed, 4 insertions(+), 3 deletions(-) diff --git a/target/riscv/pmp.c b/target/riscv/pmp.c index b0f1b0a715..5b765a9807 100644 --- a/target/riscv/pmp.c +++ b/target/riscv/pmp.c @@ -121,7 +121,7 @@ static bool pmp_write_cfg(CPURISCVState *env, uint32_t pmp_index, uint8_t val) qemu_log_mask(LOG_GUEST_ERROR, "ignoring pmpcfg write - locked\n"); } else if (env->pmp_state.pmp[pmp_index].cfg_reg != val) { env->pmp_state.pmp[pmp_index].cfg_reg = val; - pmp_update_rule(env, pmp_index); + pmp_update_rule_addr(env, pmp_index); return true; } } else { @@ -207,6 +207,8 @@ void pmp_update_rule_nums(CPURISCVState *env) env->pmp_state.num_rules++; } } + + tlb_flush(env_cpu(env)); } /* @@ -492,7 +494,7 @@ void pmpcfg_csr_write(CPURISCVState *env, uint32_t reg_index, /* If PMP permission of any addr has been changed, flush TLB pages. */ if (modified) { - tlb_flush(env_cpu(env)); + pmp_update_rule_nums(env); } } @@ -545,7 +547,6 @@ void pmpaddr_csr_write(CPURISCVState *env, uint32_t addr_index, if (env->pmp_state.pmp[addr_index].addr_reg != val) { env->pmp_state.pmp[addr_index].addr_reg = val; pmp_update_rule(env, addr_index); - tlb_flush(env_cpu(env)); } } else { qemu_log_mask(LOG_GUEST_ERROR,