From nobody Sat Jul 25 04:30:47 2026 Received: from cstnet.cn (smtp81.cstnet.cn [159.226.251.81]) (using TLSv1.2 with cipher DHE-RSA-AES256-SHA (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id E845E19DF62; Sat, 18 Jul 2026 03:52:49 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=159.226.251.81 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1784346773; cv=none; b=XG70rMi0RbCH/ag6zYy/UJicpysH6nTTNe/Fxnq/82agaJQJfVbYcydO5FavldE69yUFREs/1U54p5nd5s0+hL75juI5WVl+14L38rITyQLgZJPTKs6vF9plvSckn8lUTM6m3RQG7CRKQnN81KPv8qY92q0J36rsQ5pK+THr4FI= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1784346773; c=relaxed/simple; bh=mtlWN7Atvf6Ij1VPpIjDYwDwrIgIE5UvmVOkiMBGwfc=; h=From:To:Cc:Subject:Date:Message-ID:MIME-Version; b=W9K1Yjh/04j21xvcIpKyv04+DdjzIPxB891+5O2HppbTqhQkID+k9F3vQ1ngP+1a9bfOzSkaGqCslf3XonR0t96wtg+PTnB7cwmb8SYlFp0pLhGNliFfVcM9pV6raqcjg1t8MHLS9JZpx5Oa/CPVDVHh1XFSkWk7B1sXzYezl5o= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=iscas.ac.cn; spf=pass smtp.mailfrom=iscas.ac.cn; arc=none smtp.client-ip=159.226.251.81 Authentication-Results: smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=iscas.ac.cn Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=iscas.ac.cn Received: from localhost.localdomain (unknown [111.196.245.140]) by APP-03 (Coremail) with SMTP id rQCowACnc0GE+Fpq398tAA--.37353S2; Sat, 18 Jul 2026 11:52:36 +0800 (CST) From: Pengpeng Hou To: Anup Patel , Atish Patra Cc: Pengpeng Hou , Paul Walmsley , Palmer Dabbelt , Albert Ou , Alexandre Ghiti , Paolo Bonzini , Yifei Jiang , kvm@vger.kernel.org, kvm-riscv@lists.infradead.org, linux-riscv@lists.infradead.org, linux-kernel@vger.kernel.org Subject: [PATCH] RISC-V: KVM: Allow memslots ending at the GPA limit Date: Sat, 18 Jul 2026 11:52:36 +0800 Message-ID: <20260718033646.002.31dc89f2-caplitmus-rv@iscas.ac.cn> X-Mailer: git-send-email 2.50.1 Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable X-CM-TRANSID: rQCowACnc0GE+Fpq398tAA--.37353S2 X-Coremail-Antispam: 1UD129KBjvdXoWruryDtFW8Xr4DAw48WFy8Xwb_yoWkXrg_WF n7Ga97XFWDAF4xuasxKw4Sk3yxX395GFnrArZrZry8G3sYvF4Sk3ySvws8X345Ar43WF1Y y34kArW3tr42vjkaLaAFLSUrUUUUjb8apTn2vfkv8UJUUUU8Yxn0WfASr-VFAUDa7-sFnT 9fnUUIcSsGvfJTRUUUba8FF20E14v26r4j6ryUM7CY07I20VC2zVCF04k26cxKx2IYs7xG 6rWj6s0DM7CIcVAFz4kK6r1j6r18M28lY4IEw2IIxxk0rwA2F7IY1VAKz4vEj48ve4kI8w A2z4x0Y4vE2Ix0cI8IcVAFwI0_Gr0_Xr1l84ACjcxK6xIIjxv20xvEc7CjxVAFwI0_Gr0_ Cr1l84ACjcxK6I8E87Iv67AKxVW8Jr0_Cr1UM28EF7xvwVC2z280aVCY1x0267AKxVW8Jr 0_Cr1UM2AIxVAIcxkEcVAq07x20xvEncxIr21l5I8CrVACY4xI64kE6c02F40Ex7xfMcIj 6xIIjxv20xvE14v26r106r15McIj6I8E87Iv67AKxVWUJVW8JwAm72CE4IkC6x0Yz7v_Jr 0_Gr1lF7xvr2IYc2Ij64vIr41lF7I21c0EjII2zVCS5cI20VAGYxC7M4IIrI8v6xkF7I0E 8cxan2IY04v7MxkF7I0En4kS14v26r1q6r43MxAIw28IcxkI7VAKI48JMxC20s026xCaFV Cjc4AY6r1j6r4UMI8I3I0E5I8CrVAFwI0_Jr0_Jr4lx2IqxVCjr7xvwVAFwI0_JrI_JrWl x4CE17CEb7AF67AKxVWUtVW8ZwCIc40Y0x0EwIxGrwCI42IY6xIIjxv20xvE14v26r1j6r 1xMIIF0xvE2Ix0cI8IcVCY1x0267AKxVW8JVWxJwCI42IY6xAIw20EY4v20xvaj40_Jr0_ JF4lIxAIcVC2z280aVAFwI0_Jr0_Gr1lIxAIcVC2z280aVCY1x0267AKxVW8JVW8JrUvcS sGvfC2KfnxnUUI43ZEXa7VU13ku3UUUUU== X-CM-SenderInfo: pshqw1xhqjqxpvfd2hldfou0/ Content-Type: text/plain; charset="utf-8" KVM memslots describe half-open ranges [base_gfn, base_gfn + npages). A slot ending exactly at the guest physical-address limit has its final page below that limit and is valid. The current greater-than-or-equal comparison rejects a valid boundary case. Use a strict greater-than comparison, matching equivalent KVM architecture checks. Fixes: 9d05c1fee837 ("RISC-V: KVM: Implement stage2 page table programming") Signed-off-by: Pengpeng Hou --- arch/riscv/kvm/mmu.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/arch/riscv/kvm/mmu.c b/arch/riscv/kvm/mmu.c index 082f9b2617338..d3c0c699adb60 100644 --- a/arch/riscv/kvm/mmu.c +++ b/arch/riscv/kvm/mmu.c @@ -184,7 +184,7 @@ int kvm_arch_prepare_memory_region(struct kvm *kvm, * Prevent userspace from creating a memory region outside of the GPA * space addressable by the KVM guest GPA space. */ - if ((new->base_gfn + new->npages) >=3D + if ((new->base_gfn + new->npages) > kvm_riscv_gstage_gpa_size(kvm->arch.pgd_levels) >> PAGE_SHIFT) return -EFAULT; =20 --=20 2.43.0