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[34.92.144.28]) by smtp.gmail.com with ESMTPSA id r26sm6329902pfq.75.2020.05.03.03.10.58 (version=TLS1_2 cipher=ECDHE-ECDSA-AES128-GCM-SHA256 bits=128/128); Sun, 03 May 2020 03:11:00 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=sender:from:to:cc:subject:date:message-id:in-reply-to:references; bh=gyT3JhnhdKIwjs4eYU6gfUngC8pztPgbzgNj2PrTZlY=; b=jZIYgEC7kr/51giyb8xCI/mSLGApQvDdOqMOGD5gsnjT+mENC7dMJId9flHPxE4s4o kJRhXXOipkoeQj0VWhTV81qN5bFvRucnlwMUbXwb6wwQ+tPrajZraP6fXIxcAuswNpxb ZATykodV49+rovoEuYWYL7VobgARIeckZizZ8BbyDhc3ci92WBDf8BuyzqHkBDHMwRFF VMP8QwRjkePHI1KdWJiPtCEZquGNstADNd6SmE61Z+1uRzoVxwJd/0tD6VeJ2DBFEj5M 3emKiNU6qnT41JHNVTV3SxEUw7TP61WqHIQS63oDUzM8gz1LI7eWd/hF+DF8KbCmIlIA 8r2A== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:sender:from:to:cc:subject:date:message-id :in-reply-to:references; bh=gyT3JhnhdKIwjs4eYU6gfUngC8pztPgbzgNj2PrTZlY=; b=BJPs9JBBhV9CSYzettVUtRjYE+mkkTyefPpNro0aDbTAsUv2roQ79zG6TNZkcgmlN0 q9pOaY9Qa6fd3y1rVOAZWgZaxTKsV216Q5XpncwiREyULWqNXjwYxiYANdPlDC6QLbJo x+ZHEH1tCZSjJcag1SIrb9y0k4YBNKTPTKsF3Z5wzA6wImwXoFq8cUZbH1gL3lvnomzr Q8BqigQqL7HX/qYImbyghVS3Q6U2MX9TGvk+YPUxQes4suu1f2uIe5na2xLwwvJfshV6 mvn3ZrbUJaYT8YIM2g723a0YAz0eEw7pEouououx8gKupMLOdhQFslZIVKslkYzeFESZ pLrQ== X-Gm-Message-State: AGi0PuZKwFOSExZirwx5GZPHwyf6xT+oo7FWtdlXOsstagJ/Shd4BTli uS1BaEpeDJllfZ1rwebyPEM= X-Google-Smtp-Source: APiQypKxPXXZvoHV52Oia9QLEogfOAw/k6eKuH+DgiGfNz1tSiPiyunzoqLR9ttUryaTqlw2R6EcHw== X-Received: by 2002:a17:90a:a893:: with SMTP id h19mr10517185pjq.138.1588500660783; Sun, 03 May 2020 03:11:00 -0700 (PDT) From: Huacai Chen To: Paolo Bonzini , Thomas Bogendoerfer Subject: [PATCH V3 05/14] KVM: MIPS: Use lddir/ldpte instructions to lookup gpa_mm.pgd Date: Sun, 3 May 2020 18:05:58 +0800 Message-Id: <1588500367-1056-6-git-send-email-chenhc@lemote.com> X-Mailer: git-send-email 2.7.0 In-Reply-To: <1588500367-1056-1-git-send-email-chenhc@lemote.com> References: <1588500367-1056-1-git-send-email-chenhc@lemote.com> 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::1043; envelope-from=chenhuacai@gmail.com; helo=mail-pj1-x1043.google.com X-detected-operating-system: by eggs.gnu.org: No matching host in p0f cache. That's all we know. X-Spam_score_int: -16 X-Spam_score: -1.7 X-Spam_bar: - X-Spam_report: (-1.7 / 5.0 requ) BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_EF=-0.1, FREEMAIL_FORGED_FROMDOMAIN=0.001, FREEMAIL_FROM=0.001, HEADER_FROM_DIFFERENT_DOMAINS=0.249, RCVD_IN_DNSWL_NONE=-0.0001, SPF_PASS=-0.001, URIBL_BLOCKED=0.001 autolearn=_AUTOLEARN X-Spam_action: no action 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: kvm@vger.kernel.org, Huacai Chen , =?UTF-8?q?Philippe=20Mathieu-Daud=C3=A9?= , Jiaxun Yang , qemu-devel@nongnu.org, Aleksandar Markovic , Fuxin Zhang , Huacai Chen , linux-mips@vger.kernel.org Errors-To: qemu-devel-bounces+importer=patchew.org@nongnu.org Sender: "Qemu-devel" X-ZohoMail-DKIM: fail (Header signature does not verify) Content-Transfer-Encoding: quoted-printable MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Loongson-3 can use lddir/ldpte instuctions to accelerate page table walking, so use them to lookup gpa_mm.pgd. Signed-off-by: Huacai Chen Co-developed-by: Jiaxun Yang Reviewed-by: Aleksandar Markovic --- arch/mips/kvm/entry.c | 19 ++++++++++++++++++- 1 file changed, 18 insertions(+), 1 deletion(-) diff --git a/arch/mips/kvm/entry.c b/arch/mips/kvm/entry.c index 16e1c93..fd71694 100644 --- a/arch/mips/kvm/entry.c +++ b/arch/mips/kvm/entry.c @@ -56,6 +56,7 @@ #define C0_BADVADDR 8, 0 #define C0_BADINSTR 8, 1 #define C0_BADINSTRP 8, 2 +#define C0_PGD 9, 7 #define C0_ENTRYHI 10, 0 #define C0_GUESTCTL1 10, 4 #define C0_STATUS 12, 0 @@ -307,7 +308,10 @@ static void *kvm_mips_build_enter_guest(void *addr) =20 #ifdef CONFIG_KVM_MIPS_VZ /* Save normal linux process pgd (VZ guarantees pgd_reg is set) */ - UASM_i_MFC0(&p, K0, c0_kscratch(), pgd_reg); + if (cpu_has_ldpte) + UASM_i_MFC0(&p, K0, C0_PWBASE); + else + UASM_i_MFC0(&p, K0, c0_kscratch(), pgd_reg); UASM_i_SW(&p, K0, offsetof(struct kvm_vcpu_arch, host_pgd), K1); =20 /* @@ -469,8 +473,10 @@ void *kvm_mips_build_tlb_refill_exception(void *addr, = void *handler) u32 *p =3D addr; struct uasm_label labels[2]; struct uasm_reloc relocs[2]; +#ifndef CONFIG_CPU_LOONGSON64 struct uasm_label *l =3D labels; struct uasm_reloc *r =3D relocs; +#endif =20 memset(labels, 0, sizeof(labels)); memset(relocs, 0, sizeof(relocs)); @@ -490,6 +496,16 @@ void *kvm_mips_build_tlb_refill_exception(void *addr, = void *handler) */ preempt_disable(); =20 +#ifdef CONFIG_CPU_LOONGSON64 + UASM_i_MFC0(&p, K1, C0_PGD); + uasm_i_lddir(&p, K0, K1, 3); /* global page dir */ +#ifndef __PAGETABLE_PMD_FOLDED + uasm_i_lddir(&p, K1, K0, 1); /* middle page dir */ +#endif + uasm_i_ldpte(&p, K1, 0); /* even */ + uasm_i_ldpte(&p, K1, 1); /* odd */ + uasm_i_tlbwr(&p); +#else /* * Now for the actual refill bit. A lot of this can be common with the * Linux TLB refill handler, however we don't need to handle so many @@ -512,6 +528,7 @@ void *kvm_mips_build_tlb_refill_exception(void *addr, v= oid *handler) build_get_ptep(&p, K0, K1); build_update_entries(&p, K0, K1); build_tlb_write_entry(&p, &l, &r, tlb_random); +#endif =20 preempt_enable(); =20 --=20 2.7.0