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Tue, 10 Sep 2019 10:16:56 +0200 To: Shu-Chun Weng , Riku Voipio References: <20190816211049.57317-1-scw@google.com> From: Laurent Vivier Openpgp: preference=signencrypt Autocrypt: addr=laurent@vivier.eu; prefer-encrypt=mutual; keydata= mQINBFYFJhkBEAC2me7w2+RizYOKZM+vZCx69GTewOwqzHrrHSG07MUAxJ6AY29/+HYf6EY2 WoeuLWDmXE7A3oJoIsRecD6BXHTb0OYS20lS608anr3B0xn5g0BX7es9Mw+hV/pL+63EOCVm SUVTEQwbGQN62guOKnJJJfphbbv82glIC/Ei4Ky8BwZkUuXd7d5NFJKC9/GDrbWdj75cDNQx UZ9XXbXEKY9MHX83Uy7JFoiFDMOVHn55HnncflUncO0zDzY7CxFeQFwYRbsCXOUL9yBtqLer Ky8/yjBskIlNrp0uQSt9LMoMsdSjYLYhvk1StsNPg74+s4u0Q6z45+l8RAsgLw5OLtTa+ePM JyS7OIGNYxAX6eZk1+91a6tnqfyPcMbduxyBaYXn94HUG162BeuyBkbNoIDkB7pCByed1A7q q9/FbuTDwgVGVLYthYSfTtN0Y60OgNkWCMtFwKxRaXt1WFA5ceqinN/XkgA+vf2Ch72zBkJL RBIhfOPFv5f2Hkkj0MvsUXpOWaOjatiu0fpPo6Hw14UEpywke1zN4NKubApQOlNKZZC4hu6/ 8pv2t4HRi7s0K88jQYBRPObjrN5+owtI51xMaYzvPitHQ2053LmgsOdN9EKOqZeHAYG2SmRW LOxYWKX14YkZI5j/TXfKlTpwSMvXho+efN4kgFvFmP6WT+tPnwARAQABtCJMYXVyZW50IFZp dmllciA8bGF1cmVudEB2aXZpZXIuZXU+iQI4BBMBAgAiBQJWBTDeAhsDBgsJCAcDAgYVCAIJ CgsEFgIDAQIeAQIXgAAKCRDzDDi9Py++PCEdD/oD8LD5UWxhQrMQCsUgLlXCSM7sxGLkwmmF ozqSSljEGRhffxZvO35wMFcdX9Z0QOabVoFTKrT04YmvbjsErh/dP5zeM/4EhUByeOS7s6Yl HubMXVQTkak9Wa9Eq6irYC6L41QNzz/oTwNEqL1weV1+XC3TNnht9B76lIaELyrJvRfgsp9M rE+PzGPo5h7QHWdL/Cmu8yOtPLa8Y6l/ywEJ040IoiAUfzRoaJs2csMXf0eU6gVBhCJ4bs91 jtWTXhkzdl4tdV+NOwj3j0ukPy+RjqeL2Ej+bomnPTOW8nAZ32dapmu7Fj7VApuQO/BSIHyO NkowMMjB46yohEepJaJZkcgseaus0x960c4ua/SUm/Nm6vioRsxyUmWd2nG0m089pp8LPopq WfAk1l4GciiMepp1Cxn7cnn1kmG6fhzedXZ/8FzsKjvx/aVeZwoEmucA42uGJ3Vk9TiVdZes lqMITkHqDIpHjC79xzlWkXOsDbA2UY/P18AtgJEZQPXbcrRBtdSifCuXdDfHvI+3exIdTpvj BfbgZAar8x+lcsQBugvktlQWPfAXZu4Shobi3/mDYMEDOE92dnNRD2ChNXg2IuvAL4OW40wh gXlkHC1ZgToNGoYVvGcZFug1NI+vCeCFchX+L3bXyLMg3rAfWMFPAZLzn42plIDMsBs+x2yP +bkCDQRWBSYZARAAvFJBFuX9A6eayxUPFaEczlMbGXugs0mazbOYGlyaWsiyfyc3PStHLFPj rSTaeJpPCjBJErwpZUN4BbpkBpaJiMuVO6egrC8Xy8/cnJakHPR2JPEvmj7Gm/L9DphTcE15 92rxXLesWzGBbuYxKsj8LEnrrvLyi3kNW6B5LY3Id+ZmU8YTQ2zLuGV5tLiWKKxc6s3eMXNq wrJTCzdVd6ThXrmUfAHbcFXOycUyf9vD+s+WKpcZzCXwKgm7x1LKsJx3UhuzT8ier1L363RW ZaJBZ9CTPiu8R5NCSn9V+BnrP3wlFbtLqXp6imGhazT9nJF86b5BVKpF8Vl3F0/Y+UZ4gUwL d9cmDKBcmQU/JaRUSWvvolNu1IewZZu3rFSVgcpdaj7F/1aC0t5vLdx9KQRyEAKvEOtCmP4m 38kU/6r33t3JuTJnkigda4+Sfu5kYGsogeYG6dNyjX5wpK5GJIJikEhdkwcLM+BUOOTi+I9u tX03BGSZo7FW/J7S9y0l5a8nooDs2gBRGmUgYKqQJHCDQyYut+hmcr+BGpUn9/pp2FTWijrP inb/Pc96YDQLQA1q2AeAFv3Rx3XoBTGl0RCY4KZ02c0kX/dm3eKfMX40XMegzlXCrqtzUk+N 8LeipEsnOoAQcEONAWWo1HcgUIgCjhJhBEF0AcELOQzitbJGG5UAEQEAAYkCHwQYAQIACQUC VgUmGQIbDAAKCRDzDDi9Py++PCD3D/9VCtydWDdOyMTJvEMRQGbx0GacqpydMEWbE3kUW0ha US5jz5gyJZHKR3wuf1En/3z+CEAEfP1M3xNGjZvpaKZXrgWaVWfXtGLoWAVTfE231NMQKGoB w2Dzx5ivIqxikXB6AanBSVpRpoaHWb06tPNxDL6SVV9lZpUn03DSR6gZEZvyPheNWkvz7bE6 FcqszV/PNvwm0C5Ju7NlJA8PBAQjkIorGnvN/vonbVh5GsRbhYPOc/JVwNNr63P76rZL8Gk/ hb3xtcIEi5CCzab45+URG/lzc6OV2nTj9Lg0SNcRhFZ2ILE3txrmI+aXmAu26+EkxLLfqCVT ohb2SffQha5KgGlOSBXustQSGH0yzzZVZb+HZPEvx6d/HjQ+t9sO1bCpEgPdZjyMuuMp9N1H ctbwGdQM2Qb5zgXO+8ZSzwC+6rHHIdtcB8PH2j+Nd88dVGYlWFKZ36ELeZxD7iJflsE8E8yg OpKgu3nD0ahBDqANU/ZmNNarBJEwvM2vfusmNnWm3QMIwxNuJghRyuFfx694Im1js0ZY3LEU JGSHFG4ZynA+ZFUPA6Xf0wHeJOxGKCGIyeKORsteIqgnkINW9fnKJw2pgk8qHkwVc3Vu+wGS ZiJK0xFusPQehjWTHn9WjMG1zvQ5TQQHxau/2FkP45+nRPco6vVFQe8JmgtRF8WFJA== Message-ID: <01038119-110d-a958-8771-7b002a6a549f@vivier.eu> Date: Tue, 10 Sep 2019 10:16:52 +0200 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:60.0) Gecko/20100101 Thunderbird/60.8.0 MIME-Version: 1.0 In-Reply-To: <20190816211049.57317-1-scw@google.com> Content-Type: text/plain; charset=utf-8 Content-Language: en-US Content-Transfer-Encoding: 8bit X-Provags-ID: V03:K1:OEYGxKMJKLeUf5mo8J0vT8UdaUH896lwYKDlW5T2+YBlOT9hMIA Jn0gWmSnaW/WUJldQezwFCGVISmufaEgh5/9HYJYjz8o1PGvxYJIpMi4GonQ4jR7KokBO4c BRYR3awKnuP8F4lfQnRfbSGuhLgb2e+k/NVfRWtlGucRXeEghRqL1Irv476zU/6Yq76lmFk m9J7uTjWiDe6fEZ5Yde1g== X-UI-Out-Filterresults: notjunk:1;V03:K0:f3rgsWEmijw=:NAWtdt2nONQo3N9iIKwugi 4OtaHutpRf3vrdg5OJaNsVlMgdoPhwy/SDlz4EVipxwZkc8/CPaIWSol/l7wsb15CBa+0z49f Gaf7j5OkwrbZ57a0h5bOPwmlZ7XyBJMySsL3FBSx8XebuJqmMzsxcnU96/A8a9dX+fc5DA6O6 uD+9zlGyLFwf+tGl8rNl/cpixPOgpmUWl8pHy82EmfZq/HoRt32eOyaB4/hOGcv8o8yxw9SrA uaFCuirMfMiHxvRSWXcyJH4WX1G1QzJrAakde+qR728tCW+KVLI6zdtV+L6lTrtz89/kHfFQL YuusD/Pp3ZwtgkmLVKxO31WiXINR22q+2NvoTlg4bpFtUjxN2ySForbhgqd3Iprq5qRK5F50+ h0eSfKxM6ZNrVMGTlA+1HS8ZJPusPaPwd+yTip+euMb6mW6+Uqoa5unxe06I+odsbn8erb1Qr b/j8MHkhPr9yB0LaBexQk6RK2H2vWDW917z3TKlpeA2mTII5Ztlp62i733lF3DIlhYIoosUBh lSmEeeAoEZ8f4OVP7XGZbhqoJ5GTfqi7m7RTdlipDtfGP9Xq/JPNJ/dPaN9XX0kvlWw/GF4CM y2PUsL+mDaO2xLebK76c3RE8YUb9l4/aS1l5w4GrfV1E4x3gRWB6WgLXvzF06wC+Y//Cv3S/v 3bHJTi8iDxKoQqb3ETIMIMqq2rr4B1NGbWw5x6aidxIrS65aFXqXI+ng76Drv3MfGEg8IIV7w UU5a/8XVT9nW76KoKDoHW0EXBk6nRBa4HdDetdaZcjTKv/+rroYmP0suYdULFBpttt91HvERM 5scRreyp1SCMhCJ0MQhthncqOJrrGa69JLxlYXRPKmwswlr4ks= X-detected-operating-system: by eggs.gnu.org: GNU/Linux 2.2.x-3.x [generic] X-Received-From: 212.227.126.187 Subject: Re: [Qemu-devel] [PATCH] linux-user: add memfd_create 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: arunkaly@google.com, qemu-devel@nongnu.org Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: "Qemu-devel" Le 16/08/2019 à 23:10, Shu-Chun Weng via Qemu-devel a écrit : > Add support for the memfd_create syscall. If the host does not have the > libc wrapper, translate to a direct syscall with NC-macro. > > Buglink: https://bugs.launchpad.net/qemu/+bug/1734792 > Signed-off-by: Shu-Chun Weng > --- > include/qemu/memfd.h | 4 ++++ > linux-user/syscall.c | 11 +++++++++++ > util/memfd.c | 2 +- > 3 files changed, 16 insertions(+), 1 deletion(-) > > diff --git a/include/qemu/memfd.h b/include/qemu/memfd.h > index d551c28b68..975b6bdb77 100644 > --- a/include/qemu/memfd.h > +++ b/include/qemu/memfd.h > @@ -32,6 +32,10 @@ > #define MFD_HUGE_SHIFT 26 > #endif > > +#if defined CONFIG_LINUX && !defined CONFIG_MEMFD > +int memfd_create(const char *name, unsigned int flags); > +#endif > + > int qemu_memfd_create(const char *name, size_t size, bool hugetlb, > uint64_t hugetlbsize, unsigned int seals, Error **errp); > bool qemu_memfd_alloc_check(void); > diff --git a/linux-user/syscall.c b/linux-user/syscall.c > index 8367cb138d..b506c1f40e 100644 > --- a/linux-user/syscall.c > +++ b/linux-user/syscall.c > @@ -20,6 +20,7 @@ > #include "qemu/osdep.h" > #include "qemu/cutils.h" > #include "qemu/path.h" > +#include "qemu/memfd.h" > #include > #include > #include > @@ -11938,6 +11939,16 @@ static abi_long do_syscall1(void *cpu_env, int num, abi_long arg1, > /* PowerPC specific. */ > return do_swapcontext(cpu_env, arg1, arg2, arg3); > #endif > +#ifdef TARGET_NR_memfd_create > + case TARGET_NR_memfd_create: > + p = lock_user_string(arg1); > + if (!p) { > + return -TARGET_EFAULT; > + } > + ret = get_errno(memfd_create(p, arg2)); > + unlock_user(p, arg1, 0); > + return ret; > +#endif > > default: > qemu_log_mask(LOG_UNIMP, "Unsupported syscall: %d\n", num); > diff --git a/util/memfd.c b/util/memfd.c > index 00334e5b21..4a3c07e0be 100644 > --- a/util/memfd.c > +++ b/util/memfd.c > @@ -35,7 +35,7 @@ > #include > #include > > -static int memfd_create(const char *name, unsigned int flags) > +int memfd_create(const char *name, unsigned int flags) > { > #ifdef __NR_memfd_create > return syscall(__NR_memfd_create, name, flags); > Applied to my linux-user branch. Thanks, Laurent