From: Deepak Gupta <debug@rivosinc.com> To: paul.walmsley@sifive.com, rick.p.edgecombe@intel.com, broonie@kernel.org, Szabolcs.Nagy@arm.com, kito.cheng@sifive.com, keescook@chromium.org, ajones@ventanamicro.com, conor.dooley@microchip.com, cleger@rivosinc.com, atishp@atishpatra.org, alex@ghiti.fr, bjorn@rivosinc.com, alexghiti@rivosinc.com, samuel.holland@sifive.com, conor@kernel.org Cc: linux-doc@vger.kernel.org, linux-riscv@lists.infradead.org, linux-kernel@vger.kernel.org, devicetree@vger.kernel.org, linux-mm@kvack.org, linux-arch@vger.kernel.org, linux-kselftest@vger.kernel.org, corbet@lwn.net, palmer@dabbelt.com, aou@eecs.berkeley.edu, robh+dt@kernel.org, krzysztof.kozlowski+dt@linaro.org, oleg@redhat.com, akpm@linux-foundation.org, arnd@arndb.de, ebiederm@xmission.com, Liam.Howlett@oracle.com, vbabka@suse.cz, lstoakes@gmail.com, shuah@kernel.org, brauner@kernel.org, debug@rivosinc.com, andy.chiu@sifive.com, jerry.shih@sifive.com, hankuan.chen@sifive.com, greentime.hu@sifive.com, evan@rivosinc.com, xiao.w.wang@intel.com, charlie@rivosinc.com, apatel@ventanamicro.com, mchitale@ventanamicro.com, dbarboza@ventanamicro.com, sameo@rivosinc.com, shikemeng@huaweicloud.com, willy@infradead.org, vincent.chen@sifive.com, guoren@kernel.org, samitolvanen@google.com, songshuaishuai@tinylab.org, gerg@kernel.org, heiko@sntech.de, bhe@redhat.com, jeeheng.sia@starfivetech.com, cyy@cyyself.name, maskray@google.com, ancientmodern4@gmail.com, mathis.salmen@matsal.de, cuiyunhui@bytedance.com, bgray@linux.ibm.com, mpe@ellerman.id.au, baruch@tkos.co.il, alx@kernel.org, david@redhat.com, catalin.marinas@arm.com, revest@chromium.org, josh@joshtriplett.org, shr@devkernel.io, deller@gmx.de, omosnace@redhat.com, ojeda@kernel.org, jhubbard@nvidia.com Subject: [PATCH v3 12/29] riscv mmu: teach pte_mkwrite to manufacture shadow stack PTEs Date: Wed, 3 Apr 2024 16:35:00 -0700 [thread overview] Message-ID: <20240403234054.2020347-13-debug@rivosinc.com> (raw) In-Reply-To: <20240403234054.2020347-1-debug@rivosinc.com> pte_mkwrite creates PTEs with WRITE encodings for underlying arch. Underlying arch can have two types of writeable mappings. One that can be written using regular store instructions. Another one that can only be written using specialized store instructions (like shadow stack stores). pte_mkwrite can select write PTE encoding based on VMA range (i.e. VM_SHADOW_STACK) Signed-off-by: Deepak Gupta <debug@rivosinc.com> --- arch/riscv/include/asm/pgtable.h | 7 +++++++ arch/riscv/mm/pgtable.c | 21 +++++++++++++++++++++ 2 files changed, 28 insertions(+) diff --git a/arch/riscv/include/asm/pgtable.h b/arch/riscv/include/asm/pgtable.h index 6362407f1e83..9b837239d3e8 100644 --- a/arch/riscv/include/asm/pgtable.h +++ b/arch/riscv/include/asm/pgtable.h @@ -403,6 +403,10 @@ static inline pte_t pte_wrprotect(pte_t pte) /* static inline pte_t pte_mkread(pte_t pte) */ +struct vm_area_struct; +pte_t pte_mkwrite(pte_t pte, struct vm_area_struct *vma); +#define pte_mkwrite pte_mkwrite + static inline pte_t pte_mkwrite_novma(pte_t pte) { return __pte(pte_val(pte) | _PAGE_WRITE); @@ -694,6 +698,9 @@ static inline pmd_t pmd_mkyoung(pmd_t pmd) return pte_pmd(pte_mkyoung(pmd_pte(pmd))); } +pmd_t pmd_mkwrite(pmd_t pmd, struct vm_area_struct *vma); +#define pmd_mkwrite pmd_mkwrite + static inline pmd_t pmd_mkwrite_novma(pmd_t pmd) { return pte_pmd(pte_mkwrite_novma(pmd_pte(pmd))); diff --git a/arch/riscv/mm/pgtable.c b/arch/riscv/mm/pgtable.c index ef887efcb679..c84ae2e0424d 100644 --- a/arch/riscv/mm/pgtable.c +++ b/arch/riscv/mm/pgtable.c @@ -142,3 +142,24 @@ pmd_t pmdp_collapse_flush(struct vm_area_struct *vma, return pmd; } #endif /* CONFIG_TRANSPARENT_HUGEPAGE */ + +pte_t pte_mkwrite(pte_t pte, struct vm_area_struct *vma) +{ + if (vma_is_shadow_stack(vma->vm_flags)) + return pte_mkwrite_shstk(pte); + + pte = pte_mkwrite_novma(pte); + + return pte; +} + +pmd_t pmd_mkwrite(pmd_t pmd, struct vm_area_struct *vma) +{ + if (vma_is_shadow_stack(vma->vm_flags)) + return pmd_mkwrite_shstk(pmd); + + pmd = pmd_mkwrite_novma(pmd); + + return pmd; +} + -- 2.43.2
WARNING: multiple messages have this Message-ID (diff)
From: Deepak Gupta <debug@rivosinc.com> To: paul.walmsley@sifive.com, rick.p.edgecombe@intel.com, broonie@kernel.org, Szabolcs.Nagy@arm.com, kito.cheng@sifive.com, keescook@chromium.org, ajones@ventanamicro.com, conor.dooley@microchip.com, cleger@rivosinc.com, atishp@atishpatra.org, alex@ghiti.fr, bjorn@rivosinc.com, alexghiti@rivosinc.com, samuel.holland@sifive.com, conor@kernel.org Cc: linux-doc@vger.kernel.org, linux-riscv@lists.infradead.org, linux-kernel@vger.kernel.org, devicetree@vger.kernel.org, linux-mm@kvack.org, linux-arch@vger.kernel.org, linux-kselftest@vger.kernel.org, corbet@lwn.net, palmer@dabbelt.com, aou@eecs.berkeley.edu, robh+dt@kernel.org, krzysztof.kozlowski+dt@linaro.org, oleg@redhat.com, akpm@linux-foundation.org, arnd@arndb.de, ebiederm@xmission.com, Liam.Howlett@oracle.com, vbabka@suse.cz, lstoakes@gmail.com, shuah@kernel.org, brauner@kernel.org, debug@rivosinc.com, andy.chiu@sifive.com, jerry.shih@sifive.com, hankuan.chen@sifive.com, greentime.hu@sifive.com, evan@rivosinc.com, xiao.w.wang@intel.com, charlie@rivosinc.com, apatel@ventanamicro.com, mchitale@ventanamicro.com, dbarboza@ventanamicro.com, sameo@rivosinc.com, shikemeng@huaweicloud.com, willy@infradead.org, vincent.chen@sifive.com, guoren@kernel.org, samitolvanen@google.com, songshuaishuai@tinylab.org, gerg@kernel.org, heiko@sntech.de, bhe@redhat.com, jeeheng.sia@starfivetech.com, cyy@cyyself.name, maskray@google.com, ancientmodern4@gmail.com, mathis.salmen@matsal.de, cuiyunhui@bytedance.com, bgray@linux.ibm.com, mpe@ellerman.id.au, baruch@tkos.co.il, alx@kernel.org, david@redhat.com, catalin.marinas@arm.com, revest@chromium.org, josh@joshtriplett.org, shr@devkernel.io, deller@gmx.de, omosnace@redhat.com, ojeda@kernel.org, jhubbard@nvidia.com Subject: [PATCH v3 12/29] riscv mmu: teach pte_mkwrite to manufacture shadow stack PTEs Date: Wed, 3 Apr 2024 16:35:00 -0700 [thread overview] Message-ID: <20240403234054.2020347-13-debug@rivosinc.com> (raw) In-Reply-To: <20240403234054.2020347-1-debug@rivosinc.com> pte_mkwrite creates PTEs with WRITE encodings for underlying arch. Underlying arch can have two types of writeable mappings. One that can be written using regular store instructions. Another one that can only be written using specialized store instructions (like shadow stack stores). pte_mkwrite can select write PTE encoding based on VMA range (i.e. VM_SHADOW_STACK) Signed-off-by: Deepak Gupta <debug@rivosinc.com> --- arch/riscv/include/asm/pgtable.h | 7 +++++++ arch/riscv/mm/pgtable.c | 21 +++++++++++++++++++++ 2 files changed, 28 insertions(+) diff --git a/arch/riscv/include/asm/pgtable.h b/arch/riscv/include/asm/pgtable.h index 6362407f1e83..9b837239d3e8 100644 --- a/arch/riscv/include/asm/pgtable.h +++ b/arch/riscv/include/asm/pgtable.h @@ -403,6 +403,10 @@ static inline pte_t pte_wrprotect(pte_t pte) /* static inline pte_t pte_mkread(pte_t pte) */ +struct vm_area_struct; +pte_t pte_mkwrite(pte_t pte, struct vm_area_struct *vma); +#define pte_mkwrite pte_mkwrite + static inline pte_t pte_mkwrite_novma(pte_t pte) { return __pte(pte_val(pte) | _PAGE_WRITE); @@ -694,6 +698,9 @@ static inline pmd_t pmd_mkyoung(pmd_t pmd) return pte_pmd(pte_mkyoung(pmd_pte(pmd))); } +pmd_t pmd_mkwrite(pmd_t pmd, struct vm_area_struct *vma); +#define pmd_mkwrite pmd_mkwrite + static inline pmd_t pmd_mkwrite_novma(pmd_t pmd) { return pte_pmd(pte_mkwrite_novma(pmd_pte(pmd))); diff --git a/arch/riscv/mm/pgtable.c b/arch/riscv/mm/pgtable.c index ef887efcb679..c84ae2e0424d 100644 --- a/arch/riscv/mm/pgtable.c +++ b/arch/riscv/mm/pgtable.c @@ -142,3 +142,24 @@ pmd_t pmdp_collapse_flush(struct vm_area_struct *vma, return pmd; } #endif /* CONFIG_TRANSPARENT_HUGEPAGE */ + +pte_t pte_mkwrite(pte_t pte, struct vm_area_struct *vma) +{ + if (vma_is_shadow_stack(vma->vm_flags)) + return pte_mkwrite_shstk(pte); + + pte = pte_mkwrite_novma(pte); + + return pte; +} + +pmd_t pmd_mkwrite(pmd_t pmd, struct vm_area_struct *vma) +{ + if (vma_is_shadow_stack(vma->vm_flags)) + return pmd_mkwrite_shstk(pmd); + + pmd = pmd_mkwrite_novma(pmd); + + return pmd; +} + -- 2.43.2 _______________________________________________ linux-riscv mailing list linux-riscv@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-riscv
next prev parent reply other threads:[~2024-04-03 23:42 UTC|newest] Thread overview: 156+ messages / expand[flat|nested] mbox.gz Atom feed top 2024-04-03 23:34 [PATCH v3 00/29] riscv control-flow integrity for usermode Deepak Gupta 2024-04-03 23:34 ` Deepak Gupta 2024-04-03 23:34 ` [PATCH v3 01/29] riscv: envcfg save and restore on task switching Deepak Gupta 2024-04-03 23:34 ` Deepak Gupta 2024-05-09 0:10 ` Charlie Jenkins 2024-05-09 0:10 ` Charlie Jenkins 2024-05-09 19:00 ` Deepak Gupta 2024-05-09 19:00 ` Deepak Gupta 2024-04-03 23:34 ` [PATCH v3 02/29] riscv: define default value for envcfg for task Deepak Gupta 2024-04-03 23:34 ` Deepak Gupta 2024-05-10 22:33 ` Charlie Jenkins 2024-05-10 22:33 ` Charlie Jenkins 2024-05-13 18:33 ` Deepak Gupta 2024-05-13 18:33 ` Deepak Gupta 2024-04-03 23:34 ` [PATCH v3 03/29] riscv/Kconfig: enable HAVE_EXIT_THREAD for riscv Deepak Gupta 2024-04-03 23:34 ` Deepak Gupta 2024-05-10 22:36 ` Charlie Jenkins 2024-05-10 22:36 ` Charlie Jenkins 2024-04-03 23:34 ` [PATCH v3 04/29] riscv: zicfilp / zicfiss in dt-bindings (extensions.yaml) Deepak Gupta 2024-04-03 23:34 ` Deepak Gupta 2024-04-10 11:58 ` Rob Herring 2024-04-10 11:58 ` Rob Herring 2024-04-10 21:37 ` Deepak Gupta 2024-04-10 21:37 ` Deepak Gupta 2024-04-15 19:41 ` Rob Herring 2024-04-15 19:41 ` Rob Herring 2024-04-16 15:44 ` Deepak Gupta 2024-04-16 15:44 ` Deepak Gupta 2024-05-09 18:14 ` Conor Dooley 2024-05-09 18:14 ` Conor Dooley 2024-05-09 18:46 ` Deepak Gupta 2024-05-09 18:46 ` Deepak Gupta 2024-05-09 20:32 ` Conor Dooley 2024-05-09 20:32 ` Conor Dooley 2024-05-09 23:26 ` Deepak Gupta 2024-05-09 23:26 ` Deepak Gupta 2024-04-03 23:34 ` [PATCH v3 05/29] riscv: zicfiss / zicfilp enumeration Deepak Gupta 2024-04-03 23:34 ` Deepak Gupta 2024-05-09 0:00 ` Andy Chiu 2024-05-09 0:00 ` Andy Chiu 2024-05-09 0:07 ` Charlie Jenkins 2024-05-09 0:07 ` Charlie Jenkins 2024-04-03 23:34 ` [PATCH v3 06/29] riscv: zicfiss / zicfilp extension csr and bit definitions Deepak Gupta 2024-04-03 23:34 ` Deepak Gupta 2024-05-10 22:37 ` Charlie Jenkins 2024-05-10 22:37 ` Charlie Jenkins 2024-04-03 23:34 ` [PATCH v3 07/29] riscv: usercfi state for task and save/restore of CSR_SSP on trap entry/exit Deepak Gupta 2024-04-03 23:34 ` Deepak Gupta 2024-05-10 22:51 ` Charlie Jenkins 2024-05-10 22:51 ` Charlie Jenkins 2024-04-03 23:34 ` [PATCH v3 08/29] mm: Define VM_SHADOW_STACK for RISC-V Deepak Gupta 2024-04-03 23:34 ` Deepak Gupta 2024-04-04 18:58 ` David Hildenbrand 2024-04-04 18:58 ` David Hildenbrand 2024-04-04 19:04 ` Mark Brown 2024-04-04 19:04 ` Mark Brown 2024-04-04 19:15 ` David Hildenbrand 2024-04-04 19:15 ` David Hildenbrand 2024-04-04 19:21 ` Deepak Gupta 2024-04-04 19:21 ` Deepak Gupta 2024-04-03 23:34 ` [PATCH v3 09/29] mm: abstract shadow stack vma behind `vma_is_shadow_stack` Deepak Gupta 2024-04-03 23:34 ` Deepak Gupta 2024-04-04 19:02 ` David Hildenbrand 2024-04-04 19:02 ` David Hildenbrand 2024-04-04 21:39 ` Deepak Gupta 2024-04-04 21:39 ` Deepak Gupta 2024-04-03 23:34 ` [PATCH v3 10/29] riscv/mm : ensure PROT_WRITE leads to VM_READ | VM_WRITE Deepak Gupta 2024-04-03 23:34 ` Deepak Gupta 2024-05-10 21:02 ` Charlie Jenkins 2024-05-10 21:02 ` Charlie Jenkins 2024-05-13 17:47 ` Deepak Gupta 2024-05-13 17:47 ` Deepak Gupta 2024-05-13 18:36 ` Charlie Jenkins 2024-05-13 18:36 ` Charlie Jenkins 2024-05-13 18:41 ` Deepak Gupta 2024-05-13 18:41 ` Deepak Gupta 2024-05-13 21:26 ` Charlie Jenkins 2024-05-13 21:26 ` Charlie Jenkins 2024-05-12 16:24 ` Alexandre Ghiti 2024-05-12 16:24 ` Alexandre Ghiti 2024-05-13 18:29 ` Deepak Gupta 2024-05-13 18:29 ` Deepak Gupta 2024-04-03 23:34 ` [PATCH v3 11/29] riscv mm: manufacture shadow stack pte Deepak Gupta 2024-04-03 23:34 ` Deepak Gupta 2024-05-12 16:26 ` Alexandre Ghiti 2024-05-12 16:26 ` Alexandre Ghiti 2024-04-03 23:35 ` Deepak Gupta [this message] 2024-04-03 23:35 ` [PATCH v3 12/29] riscv mmu: teach pte_mkwrite to manufacture shadow stack PTEs Deepak Gupta 2024-05-12 16:28 ` Alexandre Ghiti 2024-05-12 16:28 ` Alexandre Ghiti 2024-05-13 17:33 ` Deepak Gupta 2024-05-13 17:33 ` Deepak Gupta 2024-04-03 23:35 ` [PATCH v3 13/29] riscv mmu: write protect and shadow stack Deepak Gupta 2024-04-03 23:35 ` Deepak Gupta 2024-05-12 16:31 ` Alexandre Ghiti 2024-05-12 16:31 ` Alexandre Ghiti 2024-05-13 17:32 ` Deepak Gupta 2024-05-13 17:32 ` Deepak Gupta 2024-04-03 23:35 ` [PATCH v3 14/29] riscv/mm: Implement map_shadow_stack() syscall Deepak Gupta 2024-04-03 23:35 ` Deepak Gupta 2024-05-12 16:50 ` Alexandre Ghiti 2024-05-12 16:50 ` Alexandre Ghiti 2024-05-13 17:25 ` Deepak Gupta 2024-05-13 17:25 ` Deepak Gupta 2024-04-03 23:35 ` [PATCH v3 15/29] riscv/shstk: If needed allocate a new shadow stack on clone Deepak Gupta 2024-04-03 23:35 ` Deepak Gupta 2024-05-12 17:05 ` Alexandre Ghiti 2024-05-12 17:05 ` Alexandre Ghiti 2024-05-13 17:10 ` Deepak Gupta 2024-05-13 17:10 ` Deepak Gupta 2024-04-03 23:35 ` [PATCH v3 16/29] prctl: arch-agnostic prctl for shadow stack Deepak Gupta 2024-04-03 23:35 ` Deepak Gupta 2024-04-03 23:35 ` [PATCH v3 17/29] prctl: arch-agnostic prctl for indirect branch tracking Deepak Gupta 2024-04-03 23:35 ` Deepak Gupta 2024-05-10 23:29 ` Charlie Jenkins 2024-05-10 23:29 ` Charlie Jenkins 2024-05-13 18:31 ` Deepak Gupta 2024-05-13 18:31 ` Deepak Gupta 2024-04-03 23:35 ` [PATCH v3 18/29] riscv: Implements arch agnostic shadow stack prctls Deepak Gupta 2024-04-03 23:35 ` Deepak Gupta 2024-04-03 23:35 ` [PATCH v3 19/29] riscv: Implements arch agnostic indirect branch tracking prctls Deepak Gupta 2024-04-03 23:35 ` Deepak Gupta 2024-04-03 23:35 ` [PATCH v3 20/29] riscv/kernel: update __show_regs to print shadow stack register Deepak Gupta 2024-04-03 23:35 ` Deepak Gupta 2024-05-12 17:10 ` Alexandre Ghiti 2024-05-12 17:10 ` Alexandre Ghiti 2024-04-03 23:35 ` [PATCH v3 21/29] riscv/traps: Introduce software check exception Deepak Gupta 2024-04-03 23:35 ` Deepak Gupta 2024-04-03 23:35 ` [PATCH v3 22/29] riscv sigcontext: adding cfi state field in sigcontext Deepak Gupta 2024-04-03 23:35 ` Deepak Gupta 2024-04-03 23:35 ` [PATCH v3 23/29] riscv signal: Save and restore of shadow stack for signal Deepak Gupta 2024-04-03 23:35 ` Deepak Gupta 2024-04-03 23:35 ` [PATCH v3 24/29] riscv/ptrace: riscv cfi status and state via ptrace and in core files Deepak Gupta 2024-04-03 23:35 ` Deepak Gupta 2024-04-03 23:35 ` [PATCH v3 25/29] riscv/hwprobe: zicfilp / zicfiss enumeration in hwprobe Deepak Gupta 2024-04-03 23:35 ` Deepak Gupta 2024-04-03 23:35 ` [PATCH v3 26/29] riscv: create a config for shadow stack and landing pad instr support Deepak Gupta 2024-04-03 23:35 ` Deepak Gupta 2024-04-03 23:35 ` [PATCH v3 27/29] riscv: Documentation for landing pad / indirect branch tracking Deepak Gupta 2024-04-03 23:35 ` Deepak Gupta 2024-05-10 20:30 ` Charlie Jenkins 2024-05-10 20:30 ` Charlie Jenkins 2024-05-13 17:07 ` Deepak Gupta 2024-05-13 17:07 ` Deepak Gupta 2024-04-03 23:35 ` [PATCH v3 28/29] riscv: Documentation for shadow stack on riscv Deepak Gupta 2024-04-03 23:35 ` Deepak Gupta 2024-04-03 23:35 ` [PATCH v3 29/29] kselftest/riscv: kselftest for user mode cfi Deepak Gupta 2024-04-03 23:35 ` Deepak Gupta 2024-05-09 18:21 ` Charlie Jenkins 2024-05-09 18:21 ` Charlie Jenkins 2024-05-09 19:16 ` Deepak Gupta 2024-05-09 19:16 ` Deepak Gupta 2024-05-10 1:20 ` Charlie Jenkins 2024-05-10 1:20 ` Charlie Jenkins 2024-05-09 0:33 ` [PATCH v3 00/29] riscv control-flow integrity for usermode Charlie Jenkins 2024-05-09 0:33 ` Charlie Jenkins
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