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Tue, 11 Mar 2025 14:56:11 -0700 (PDT) MIME-Version: 1.0 References: <20250311123326.2686682-1-hca@linux.ibm.com> <20250311123326.2686682-3-hca@linux.ibm.com> In-Reply-To: <20250311123326.2686682-3-hca@linux.ibm.com> From: Jeff Xu Date: Tue, 11 Mar 2025 14:55:59 -0700 X-Gm-Features: AQ5f1JproEjPKIxAE30A0OuywGTTestqZJn0ft9KPznI_k8qhCvO_e_XSZ-aYQc Message-ID: Subject: Re: [PATCH mm-unstable 2/2] mseal sysmap: enable s390 To: Heiko Carstens Cc: Andrew Morton , Lorenzo Stoakes , "Liam R . Howlett" , Kees Cook , =?UTF-8?Q?Thomas_Wei=C3=9Fschuh?= , Alexander Gordeev , Sven Schnelle , Vasily Gorbik , Christian Borntraeger , linux-kernel@vger.kernel.org, linux-mm@kvack.org, linux-hardening@vger.kernel.org Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable X-Stat-Signature: hmmjfg5nmkuugo1ej57wc9omthsbqsqg X-Rspamd-Queue-Id: F251980008 X-Rspam-User: X-Rspamd-Server: rspam09 X-HE-Tag: 1741730172-621874 X-HE-Meta: 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 YUkSl0/T 0t0lBye7vdjh1BThrHIOx43oAjtOJ/8bfGJ+6Rsw/xzUSfiAfmc/PB1AFozKWmBjc5VAGeQtnFD30rHluEIBwNC1LwYClo1bFAzMpttHDUgBkbd10nsQ71Pa8AnCPZ4FG9e093scVzJLesD9GOsHukdJDAF01gFjScZGUDvOgmpHrafWVodM6y0p+ArSyBxwyPt3q0RhOLFHHVafEFGI/hdlFQLdkjp/D+swLs+6fQIN+FRh1A3U0aD3Pzw== X-Bogosity: Ham, tests=bogofilter, spamicity=0.007199, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: List-Subscribe: List-Unsubscribe: On Tue, Mar 11, 2025 at 5:33=E2=80=AFAM Heiko Carstens = wrote: > > Provide support for CONFIG_MSEAL_SYSTEM_MAPPINGS on s390, covering the > vdso. > > Signed-off-by: Heiko Carstens > --- > arch/s390/Kconfig | 1 + > arch/s390/kernel/vdso.c | 2 +- > 2 files changed, 2 insertions(+), 1 deletion(-) > > diff --git a/arch/s390/Kconfig b/arch/s390/Kconfig > index 608a965e2344..93b880992596 100644 > --- a/arch/s390/Kconfig > +++ b/arch/s390/Kconfig > @@ -141,6 +141,7 @@ config S390 > select ARCH_SUPPORTS_DEBUG_PAGEALLOC > select ARCH_SUPPORTS_HUGETLBFS > select ARCH_SUPPORTS_INT128 if CC_HAS_INT128 && CC_IS_CLANG > + select ARCH_SUPPORTS_MSEAL_SYSTEM_MAPPINGS > select ARCH_SUPPORTS_NUMA_BALANCING > select ARCH_SUPPORTS_PER_VMA_LOCK > select ARCH_USE_BUILTIN_BSWAP > diff --git a/arch/s390/kernel/vdso.c b/arch/s390/kernel/vdso.c > index 70c8f9ad13cd..430feb1a5013 100644 > --- a/arch/s390/kernel/vdso.c > +++ b/arch/s390/kernel/vdso.c > @@ -80,7 +80,7 @@ static int map_vdso(unsigned long addr, unsigned long v= dso_mapping_len) > vdso_text_start =3D vvar_start + VDSO_NR_PAGES * PAGE_SIZE; > /* VM_MAYWRITE for COW so gdb can set breakpoints */ > vma =3D _install_special_mapping(mm, vdso_text_start, vdso_text_l= en, > - VM_READ|VM_EXEC| > + VM_READ|VM_EXEC|VM_SEALED_SYSMAP| > VM_MAYREAD|VM_MAYWRITE|VM_MAYEXEC, > vdso_mapping); > if (IS_ERR(vma)) { > -- > 2.45.2 > Great ! one more architecture uses this feature. Reviewed-by: Jeff Xu