From: Ackerley Tng <ackerleytng@google.com>
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Ackerley Tng <ackerleytng@google.com>
Subject: [RFC PATCH v3 2/2] selftests: restrictedmem: Check hugepage-ness of shmem file backing restrictedmem fd
Date: Fri, 31 Mar 2023 23:50:40 +0000 [thread overview]
Message-ID: <0061b62966d34952fb9f51235d31100df0baf450.1680306489.git.ackerleytng@google.com> (raw)
In-Reply-To: <cover.1680306489.git.ackerleytng@google.com>
For memfd_restricted() calls without a userspace mount, the backing
file should be the shmem mount in the kernel, and the size of backing
pages should be as defined by system-wide shmem configuration.
If a userspace mount is provided, the size of backing pages should be
as defined in the mount.
Also includes negative tests for invalid inputs, including fds
representing read-only superblocks/mounts.
Signed-off-by: Ackerley Tng <ackerleytng@google.com>
---
tools/testing/selftests/Makefile | 1 +
.../selftests/restrictedmem/.gitignore | 3 +
.../testing/selftests/restrictedmem/Makefile | 15 +
.../testing/selftests/restrictedmem/common.c | 9 +
.../testing/selftests/restrictedmem/common.h | 8 +
.../restrictedmem_hugepage_test.c | 486 ++++++++++++++++++
6 files changed, 522 insertions(+)
create mode 100644 tools/testing/selftests/restrictedmem/.gitignore
create mode 100644 tools/testing/selftests/restrictedmem/Makefile
create mode 100644 tools/testing/selftests/restrictedmem/common.c
create mode 100644 tools/testing/selftests/restrictedmem/common.h
create mode 100644 tools/testing/selftests/restrictedmem/restrictedmem_hugepage_test.c
diff --git a/tools/testing/selftests/Makefile b/tools/testing/selftests/Makefile
index f07aef7c592c..44078eeefb79 100644
--- a/tools/testing/selftests/Makefile
+++ b/tools/testing/selftests/Makefile
@@ -60,6 +60,7 @@ TARGETS += pstore
TARGETS += ptrace
TARGETS += openat2
TARGETS += resctrl
+TARGETS += restrictedmem
TARGETS += rlimits
TARGETS += rseq
TARGETS += rtc
diff --git a/tools/testing/selftests/restrictedmem/.gitignore b/tools/testing/selftests/restrictedmem/.gitignore
new file mode 100644
index 000000000000..2581bcc8ff29
--- /dev/null
+++ b/tools/testing/selftests/restrictedmem/.gitignore
@@ -0,0 +1,3 @@
+# SPDX-License-Identifier: GPL-2.0-only
+
+restrictedmem_hugepage_test
diff --git a/tools/testing/selftests/restrictedmem/Makefile b/tools/testing/selftests/restrictedmem/Makefile
new file mode 100644
index 000000000000..8e5378d20226
--- /dev/null
+++ b/tools/testing/selftests/restrictedmem/Makefile
@@ -0,0 +1,15 @@
+# SPDX-License-Identifier: GPL-2.0
+
+CFLAGS = $(KHDR_INCLUDES)
+CFLAGS += -Wall -Wstrict-prototypes -Wuninitialized -std=gnu99
+
+TEST_GEN_PROGS += restrictedmem_hugepage_test
+
+include ../lib.mk
+
+EXTRA_CLEAN = $(OUTPUT)/common.o
+
+$(OUTPUT)/common.o: common.c
+ $(CC) $(CFLAGS) $(CPPFLAGS) $(TARGET_ARCH) -c -ffreestanding $< -o $@
+
+$(TEST_GEN_PROGS): $(OUTPUT)/common.o
diff --git a/tools/testing/selftests/restrictedmem/common.c b/tools/testing/selftests/restrictedmem/common.c
new file mode 100644
index 000000000000..03dac843404f
--- /dev/null
+++ b/tools/testing/selftests/restrictedmem/common.c
@@ -0,0 +1,9 @@
+// SPDX-License-Identifier: GPL-2.0-only
+
+#include <sys/syscall.h>
+#include <unistd.h>
+
+int memfd_restricted(unsigned int flags, int mount_fd)
+{
+ return syscall(__NR_memfd_restricted, flags, mount_fd);
+}
diff --git a/tools/testing/selftests/restrictedmem/common.h b/tools/testing/selftests/restrictedmem/common.h
new file mode 100644
index 000000000000..06284ed86baf
--- /dev/null
+++ b/tools/testing/selftests/restrictedmem/common.h
@@ -0,0 +1,8 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+
+#ifndef SELFTESTS_RESTRICTEDMEM_COMMON_H
+#define SELFTESTS_RESTRICTEDMEM_COMMON_H
+
+int memfd_restricted(unsigned int flags, int mount_fd);
+
+#endif // SELFTESTS_RESTRICTEDMEM_COMMON_H
diff --git a/tools/testing/selftests/restrictedmem/restrictedmem_hugepage_test.c b/tools/testing/selftests/restrictedmem/restrictedmem_hugepage_test.c
new file mode 100644
index 000000000000..9ed319b83cb8
--- /dev/null
+++ b/tools/testing/selftests/restrictedmem/restrictedmem_hugepage_test.c
@@ -0,0 +1,486 @@
+// SPDX-License-Identifier: GPL-2.0-only
+
+#define _GNU_SOURCE /* for O_PATH */
+#define _POSIX_C_SOURCE /* for PATH_MAX */
+#include <limits.h>
+#include <stdio.h>
+#include <string.h>
+#include <sys/mman.h>
+#include <sys/mount.h>
+#include <sys/stat.h>
+#include <unistd.h>
+
+#include "linux/restrictedmem.h"
+
+#include "common.h"
+#include "../kselftest_harness.h"
+
+/*
+ * Expect policy to be one of always, within_size, advise, never,
+ * deny, force
+ */
+#define POLICY_BUF_SIZE 12
+
+static int get_hpage_pmd_size(void)
+{
+ FILE *fp;
+ char buf[100];
+ char *ret;
+ int size;
+
+ fp = fopen("/sys/kernel/mm/transparent_hugepage/hpage_pmd_size", "r");
+ if (!fp)
+ return -1;
+
+ ret = fgets(buf, 100, fp);
+ if (ret != buf) {
+ size = -1;
+ goto out;
+ }
+
+ if (sscanf(buf, "%d\n", &size) != 1)
+ size = -1;
+
+out:
+ fclose(fp);
+
+ return size;
+}
+
+static bool is_valid_shmem_thp_policy(char *policy)
+{
+ if (strcmp(policy, "always") == 0)
+ return true;
+ if (strcmp(policy, "within_size") == 0)
+ return true;
+ if (strcmp(policy, "advise") == 0)
+ return true;
+ if (strcmp(policy, "never") == 0)
+ return true;
+ if (strcmp(policy, "deny") == 0)
+ return true;
+ if (strcmp(policy, "force") == 0)
+ return true;
+
+ return false;
+}
+
+static int get_shmem_thp_policy(char *policy)
+{
+ FILE *fp;
+ char buf[100];
+ char *left = NULL;
+ char *right = NULL;
+ int ret = -1;
+
+ fp = fopen("/sys/kernel/mm/transparent_hugepage/shmem_enabled", "r");
+ if (!fp)
+ return -1;
+
+ if (fgets(buf, 100, fp) != buf)
+ goto out;
+
+ /*
+ * Expect shmem_enabled to be of format like "always within_size advise
+ * [never] deny force"
+ */
+ left = memchr(buf, '[', 100);
+ if (!left)
+ goto out;
+
+ right = memchr(buf, ']', 100);
+ if (!right)
+ goto out;
+
+ memcpy(policy, left + 1, right - left - 1);
+
+ ret = !is_valid_shmem_thp_policy(policy);
+
+out:
+ fclose(fp);
+ return ret;
+}
+
+static int write_string_to_file(const char *path, const char *string)
+{
+ FILE *fp;
+ size_t len = strlen(string);
+ int ret = -1;
+
+ fp = fopen(path, "w");
+ if (!fp)
+ return ret;
+
+ if (fwrite(string, 1, len, fp) != len)
+ goto out;
+
+ ret = 0;
+
+out:
+ fclose(fp);
+ return ret;
+}
+
+static int set_shmem_thp_policy(char *policy)
+{
+ int ret = -1;
+ /* +1 for newline */
+ char to_write[POLICY_BUF_SIZE + 1] = { 0 };
+
+ if (!is_valid_shmem_thp_policy(policy))
+ return ret;
+
+ ret = snprintf(to_write, POLICY_BUF_SIZE + 1, "%s\n", policy);
+ if (ret != strlen(policy) + 1)
+ return -1;
+
+ ret = write_string_to_file(
+ "/sys/kernel/mm/transparent_hugepage/shmem_enabled", to_write);
+
+ return ret;
+}
+
+FIXTURE(reset_shmem_enabled)
+{
+ char shmem_enabled[POLICY_BUF_SIZE];
+};
+
+FIXTURE_SETUP(reset_shmem_enabled)
+{
+ memset(self->shmem_enabled, 0, POLICY_BUF_SIZE);
+ ASSERT_EQ(get_shmem_thp_policy(self->shmem_enabled), 0);
+}
+
+FIXTURE_TEARDOWN(reset_shmem_enabled)
+{
+ ASSERT_EQ(set_shmem_thp_policy(self->shmem_enabled), 0);
+}
+
+TEST_F(reset_shmem_enabled, restrictedmem_fstat_shmem_enabled_never)
+{
+ int fd = -1;
+ struct stat stat;
+
+ ASSERT_EQ(set_shmem_thp_policy("never"), 0);
+
+ fd = memfd_restricted(0, -1);
+ ASSERT_GT(fd, 0);
+
+ ASSERT_EQ(fstat(fd, &stat), 0);
+
+ /*
+ * st_blksize is set based on the superblock's s_blocksize_bits. For
+ * shmem, this is set to PAGE_SHIFT
+ */
+ ASSERT_EQ(stat.st_blksize, getpagesize());
+
+ close(fd);
+}
+
+TEST_F(reset_shmem_enabled, restrictedmem_fstat_shmem_enabled_always)
+{
+ int fd = -1;
+ struct stat stat;
+
+ ASSERT_EQ(set_shmem_thp_policy("always"), 0);
+
+ fd = memfd_restricted(0, -1);
+ ASSERT_GT(fd, 0);
+
+ ASSERT_EQ(fstat(fd, &stat), 0);
+
+ ASSERT_EQ(stat.st_blksize, get_hpage_pmd_size());
+
+ close(fd);
+}
+
+TEST(restrictedmem_tmpfile_invalid_fd)
+{
+ int fd = memfd_restricted(RMFD_USERMNT, -2);
+
+ ASSERT_EQ(fd, -1);
+ ASSERT_EQ(errno, EINVAL);
+}
+
+TEST(restrictedmem_tmpfile_fd_not_a_mount)
+{
+ int fd = memfd_restricted(RMFD_USERMNT, STDOUT_FILENO);
+
+ ASSERT_EQ(fd, -1);
+ ASSERT_EQ(errno, EINVAL);
+}
+
+TEST(restrictedmem_tmpfile_not_tmpfs_mount)
+{
+ int fd = -1;
+ int mfd = -1;
+
+ mfd = open("/proc", O_PATH);
+ ASSERT_NE(mfd, -1);
+
+ fd = memfd_restricted(RMFD_USERMNT, mfd);
+
+ ASSERT_EQ(fd, -1);
+ ASSERT_EQ(errno, EINVAL);
+}
+
+FIXTURE(tmpfs_hugepage_sfd)
+{
+ int sfd;
+};
+
+FIXTURE_SETUP(tmpfs_hugepage_sfd)
+{
+ self->sfd = fsopen("tmpfs", 0);
+ ASSERT_NE(self->sfd, -1);
+}
+
+FIXTURE_TEARDOWN(tmpfs_hugepage_sfd)
+{
+ EXPECT_EQ(close(self->sfd), 0);
+}
+
+TEST_F(tmpfs_hugepage_sfd, restrictedmem_fstat_tmpfs_huge_always)
+{
+ int ret = -1;
+ int fd = -1;
+ int mfd = -1;
+ struct stat stat;
+
+ fsconfig(self->sfd, FSCONFIG_SET_STRING, "huge", "always", 0);
+ fsconfig(self->sfd, FSCONFIG_CMD_CREATE, NULL, NULL, 0);
+
+ mfd = fsmount(self->sfd, 0, 0);
+ ASSERT_NE(mfd, -1);
+
+ fd = memfd_restricted(RMFD_USERMNT, mfd);
+ ASSERT_GT(fd, 0);
+
+ /* User can close reference to mount */
+ ret = close(mfd);
+ ASSERT_EQ(ret, 0);
+
+ ret = fstat(fd, &stat);
+ ASSERT_EQ(ret, 0);
+ ASSERT_EQ(stat.st_blksize, get_hpage_pmd_size());
+
+ close(fd);
+}
+
+TEST_F(tmpfs_hugepage_sfd, restrictedmem_fstat_tmpfs_huge_never)
+{
+ int ret = -1;
+ int fd = -1;
+ int mfd = -1;
+ struct stat stat;
+
+ fsconfig(self->sfd, FSCONFIG_SET_STRING, "huge", "never", 0);
+ fsconfig(self->sfd, FSCONFIG_CMD_CREATE, NULL, NULL, 0);
+
+ mfd = fsmount(self->sfd, 0, 0);
+ ASSERT_NE(mfd, -1);
+
+ fd = memfd_restricted(RMFD_USERMNT, mfd);
+ ASSERT_GT(fd, 0);
+
+ /* User can close reference to mount */
+ ret = close(mfd);
+ ASSERT_EQ(ret, 0);
+
+ ret = fstat(fd, &stat);
+ ASSERT_EQ(ret, 0);
+ ASSERT_EQ(stat.st_blksize, getpagesize());
+
+ close(fd);
+}
+
+TEST_F(tmpfs_hugepage_sfd, restrictedmem_check_mount_flags)
+{
+ int ret = -1;
+ int fd = -1;
+ int mfd = -1;
+
+ fsconfig(self->sfd, FSCONFIG_CMD_CREATE, NULL, NULL, 0);
+
+ mfd = fsmount(self->sfd, 0, MOUNT_ATTR_RDONLY);
+ ASSERT_NE(mfd, -1);
+
+ fd = memfd_restricted(RMFD_USERMNT, mfd);
+ ASSERT_EQ(fd, -1);
+ ASSERT_EQ(errno, EROFS);
+
+ ret = close(mfd);
+ ASSERT_EQ(ret, 0);
+}
+
+TEST_F(tmpfs_hugepage_sfd, restrictedmem_check_superblock_flags)
+{
+ int ret = -1;
+ int fd = -1;
+ int mfd = -1;
+
+ fsconfig(self->sfd, FSCONFIG_SET_FLAG, "ro", NULL, 0);
+ fsconfig(self->sfd, FSCONFIG_CMD_CREATE, NULL, NULL, 0);
+
+ mfd = fsmount(self->sfd, 0, 0);
+ ASSERT_NE(mfd, -1);
+
+ fd = memfd_restricted(RMFD_USERMNT, mfd);
+ ASSERT_EQ(fd, -1);
+ ASSERT_EQ(errno, EROFS);
+
+ ret = close(mfd);
+ ASSERT_EQ(ret, 0);
+}
+
+static bool directory_exists(const char *path)
+{
+ struct stat sb;
+
+ return stat(path, &sb) == 0 && S_ISDIR(sb.st_mode);
+}
+
+FIXTURE(tmpfs_hugepage_mount_path)
+{
+ char *mount_path;
+};
+
+FIXTURE_SETUP(tmpfs_hugepage_mount_path)
+{
+ int ret = -1;
+
+ /* /tmp is an FHS-mandated world-writable directory */
+ self->mount_path = "/tmp/restrictedmem-selftest-mnt";
+
+ if (!directory_exists(self->mount_path)) {
+ ret = mkdir(self->mount_path, 0777);
+ ASSERT_EQ(ret, 0);
+ }
+}
+
+FIXTURE_TEARDOWN(tmpfs_hugepage_mount_path)
+{
+ int ret = -1;
+
+ if (!directory_exists(self->mount_path))
+ return;
+
+ ret = umount2(self->mount_path, MNT_FORCE);
+ EXPECT_EQ(ret, 0);
+ if (ret == -1 && errno == EINVAL)
+ fprintf(stderr, " %s was not mounted\n", self->mount_path);
+
+ ret = rmdir(self->mount_path);
+ EXPECT_EQ(ret, 0);
+ if (ret == -1)
+ fprintf(stderr, " rmdir(%s) failed: %m\n", self->mount_path);
+}
+
+/*
+ * memfd_restricted() syscall can only be used with the fd of the root of the
+ * mount. When the restrictedmem's fd is open, a user should not be able to
+ * unmount or remove the mounted directory
+ */
+TEST_F(tmpfs_hugepage_mount_path, restrictedmem_umount_rmdir_while_file_open)
+{
+ int ret = -1;
+ int fd = -1;
+ int mfd = -1;
+ struct stat stat;
+
+ ret = mount("name", self->mount_path, "tmpfs", 0, "huge=always");
+ ASSERT_EQ(ret, 0);
+
+ mfd = open(self->mount_path, O_PATH);
+ ASSERT_NE(mfd, -1);
+
+ fd = memfd_restricted(RMFD_USERMNT, mfd);
+ ASSERT_GT(fd, 0);
+
+ /* We don't need this reference to the mount anymore */
+ ret = close(mfd);
+ ASSERT_EQ(ret, 0);
+
+ /* restrictedmem's fd should still be usable */
+ ret = fstat(fd, &stat);
+ ASSERT_EQ(ret, 0);
+ ASSERT_EQ(stat.st_blksize, get_hpage_pmd_size());
+
+ /* User should not be able to unmount directory */
+ ret = umount2(self->mount_path, MNT_FORCE);
+ ASSERT_EQ(ret, -1);
+ ASSERT_EQ(errno, EBUSY);
+
+ ret = rmdir(self->mount_path);
+ ASSERT_EQ(ret, -1);
+ ASSERT_EQ(errno, EBUSY);
+
+ close(fd);
+}
+
+/* The fd of a file on the mount cannot be provided as mount_fd */
+TEST_F(tmpfs_hugepage_mount_path, restrictedmem_provide_fd_of_file)
+{
+ int ret = -1;
+ int fd = -1;
+ int ffd = -1;
+ char tmp_file_path[PATH_MAX] = { 0 };
+
+ ret = mount("name", self->mount_path, "tmpfs", 0, "huge=always");
+ ASSERT_EQ(ret, 0);
+
+ snprintf(tmp_file_path, PATH_MAX, "%s/tmp-file", self->mount_path);
+ ret = write_string_to_file(tmp_file_path, "filler\n");
+ ASSERT_EQ(ret, 0);
+
+ ffd = open(tmp_file_path, O_RDWR);
+ ASSERT_GT(ffd, 0);
+
+ fd = memfd_restricted(RMFD_USERMNT, ffd);
+ ASSERT_LT(fd, 0);
+ ASSERT_EQ(errno, EINVAL);
+
+ ret = close(ffd);
+ ASSERT_EQ(ret, 0);
+
+ close(fd);
+ remove(tmp_file_path);
+}
+
+/* The fd of files on the mount cannot be provided as mount_fd */
+TEST_F(tmpfs_hugepage_mount_path, restrictedmem_provide_fd_of_file_in_subdir)
+{
+ int ret = -1;
+ int fd = -1;
+ int ffd = -1;
+ char tmp_dir_path[PATH_MAX] = { 0 };
+ char tmp_file_path[PATH_MAX] = { 0 };
+
+ ret = mount("name", self->mount_path, "tmpfs", 0, "huge=always");
+ ASSERT_EQ(ret, 0);
+
+ snprintf(tmp_dir_path, PATH_MAX, "%s/tmp-subdir", self->mount_path);
+ ret = mkdir(tmp_dir_path, 0777);
+ ASSERT_EQ(ret, 0);
+
+ snprintf(tmp_file_path, PATH_MAX, "%s/tmp-subdir/tmp-file",
+ self->mount_path);
+ ret = write_string_to_file(tmp_file_path, "filler\n");
+ ASSERT_EQ(ret, 0);
+
+ ffd = open(tmp_file_path, O_RDWR);
+ ASSERT_NE(ffd, -1);
+
+ fd = memfd_restricted(RMFD_USERMNT, ffd);
+ ASSERT_LT(fd, 0);
+ ASSERT_EQ(errno, EINVAL);
+
+ ret = close(ffd);
+ ASSERT_EQ(ret, 0);
+
+ close(fd);
+ remove(tmp_file_path);
+ rmdir(tmp_dir_path);
+}
+
+TEST_HARNESS_MAIN
--
2.40.0.348.gf938b09366-goog
next prev parent reply other threads:[~2023-03-31 23:51 UTC|newest]
Thread overview: 398+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-03-31 23:50 [RFC PATCH v3 0/2] Providing mount in memfd_restricted() syscall Ackerley Tng
2023-03-31 23:50 ` [RFC PATCH v3 1/2] mm: restrictedmem: Allow userspace to specify mount for memfd_restricted Ackerley Tng
2023-04-03 8:21 ` David Hildenbrand
2023-04-05 22:29 ` Ackerley Tng
2023-04-04 8:25 ` Kirill A. Shutemov
2023-04-05 22:32 ` Ackerley Tng
2023-04-04 13:53 ` Christian Brauner
2023-04-04 14:58 ` Christian Brauner
2023-04-05 21:58 ` Ackerley Tng
2023-04-12 9:59 ` Christian Brauner
2023-04-13 22:53 ` Ackerley Tng
2023-04-13 23:07 ` Sean Christopherson
2023-03-31 23:50 ` Ackerley Tng [this message]
2023-04-03 8:24 ` [RFC PATCH v3 2/2] selftests: restrictedmem: Check hugepage-ness of shmem file backing restrictedmem fd David Hildenbrand
2023-04-11 1:35 ` Ackerley Tng
-- strict thread matches above, loose matches on Subject: below --
2022-12-02 6:13 [PATCH v10 0/9] KVM: mm: fd-based approach for supporting KVM Chao Peng
2022-12-02 6:13 ` [PATCH v10 1/9] mm: Introduce memfd_restricted system call to create restricted user memory Chao Peng
2022-12-06 14:57 ` Fuad Tabba
2022-12-07 13:50 ` Chao Peng
2022-12-13 23:49 ` Huang, Kai
2022-12-19 7:53 ` Chao Peng
2022-12-19 8:48 ` Huang, Kai
2022-12-20 7:22 ` Chao Peng
2022-12-20 8:33 ` Huang, Kai
2022-12-21 13:39 ` Chao Peng
2022-12-22 0:37 ` Huang, Kai
2022-12-23 8:20 ` Chao Peng
2023-01-23 14:03 ` Vlastimil Babka
2023-01-23 15:18 ` Kirill A. Shutemov
2023-02-13 14:23 ` Vlastimil Babka
2023-01-23 23:01 ` Huang, Kai
2023-01-23 23:38 ` Sean Christopherson
2023-01-24 7:51 ` Vlastimil Babka
2022-12-22 18:15 ` Sean Christopherson
2022-12-23 0:50 ` Huang, Kai
2022-12-23 8:24 ` Chao Peng
2023-01-23 15:43 ` Kirill A. Shutemov
2023-02-13 11:43 ` Vlastimil Babka
2023-02-13 13:10 ` Michael Roth
2023-01-13 21:54 ` Sean Christopherson
2023-01-17 12:41 ` Chao Peng
2023-01-17 16:34 ` Sean Christopherson
2023-01-18 8:16 ` Chao Peng
2023-01-18 10:17 ` Isaku Yamahata
2023-02-22 2:07 ` Alexey Kardashevskiy
2023-02-24 5:42 ` Chao Peng
2023-01-30 5:26 ` Ackerley Tng
2023-01-30 6:04 ` Wang, Wei W
2023-02-16 9:51 ` Nikunj A. Dadhania
2023-03-20 19:08 ` Michael Roth
2023-04-13 15:25 ` [PATCH v7 00/14] KVM: mm: fd-based approach for supporting KVM guest private memory Christian Brauner
2023-04-13 22:28 ` Sean Christopherson
2023-04-14 22:38 ` Ackerley Tng
2023-04-14 23:26 ` Sean Christopherson
2023-04-15 0:06 ` Sean Christopherson
2023-04-19 8:29 ` Christian Brauner
2023-04-20 0:49 ` Sean Christopherson
2023-04-20 8:35 ` Christian Brauner
2023-04-13 17:22 ` [PATCH v10 1/9] mm: Introduce memfd_restricted system call to create restricted user memory Ackerley Tng
2022-12-02 6:13 ` [PATCH v10 2/9] KVM: Introduce per-page memory attributes Chao Peng
2022-12-06 13:34 ` Fabiano Rosas
2022-12-07 14:31 ` Chao Peng
2022-12-06 15:07 ` Fuad Tabba
2022-12-07 14:51 ` Chao Peng
2022-12-16 15:09 ` Borislav Petkov
2022-12-19 8:15 ` Chao Peng
2022-12-19 10:17 ` Borislav Petkov
2022-12-20 7:24 ` Chao Peng
2022-12-28 8:28 ` Chenyi Qiang
2023-01-03 1:39 ` Chao Peng
2023-01-03 3:32 ` Wang, Wei W
2023-01-03 23:06 ` Sean Christopherson
2023-01-05 4:39 ` Chao Peng
2023-01-13 22:02 ` Sean Christopherson
2023-01-17 3:21 ` Binbin Wu
2023-01-17 13:30 ` Chao Peng
2023-01-17 17:25 ` Sean Christopherson
2023-02-09 7:25 ` Isaku Yamahata
2023-02-10 0:35 ` Sean Christopherson
2023-02-13 23:53 ` Isaku Yamahata
2023-02-14 18:07 ` Sean Christopherson
2023-05-19 17:32 ` Nicolas Saenz Julienne
2023-05-19 18:23 ` Sean Christopherson
2023-05-19 19:49 ` Nicolas Saenz Julienne
2023-05-19 19:57 ` Sean Christopherson
2023-05-23 18:59 ` Nicolas Saenz Julienne
2022-12-02 6:13 ` [PATCH v10 3/9] KVM: Extend the memslot to support fd-based private memory Chao Peng
2022-12-05 9:03 ` Fuad Tabba
2022-12-06 11:53 ` Chao Peng
2022-12-06 12:39 ` Fuad Tabba
2022-12-07 15:10 ` Chao Peng
2022-12-08 8:37 ` Xiaoyao Li
2022-12-08 11:30 ` Chao Peng
2022-12-13 12:04 ` Xiaoyao Li
2022-12-19 7:50 ` Chao Peng
2022-12-19 14:36 ` Borislav Petkov
2022-12-20 7:43 ` Chao Peng
2022-12-20 9:55 ` Borislav Petkov
2022-12-21 13:42 ` Chao Peng
2023-01-05 11:23 ` Jarkko Sakkinen
2023-01-06 9:40 ` Chao Peng
2023-01-09 19:32 ` Sean Christopherson
2023-01-10 9:14 ` Chao Peng
2023-01-10 22:51 ` Vishal Annapurve
2023-01-13 22:37 ` Sean Christopherson
2023-01-17 12:42 ` Chao Peng
2023-01-20 23:42 ` Jarkko Sakkinen
2023-01-20 23:28 ` Jarkko Sakkinen
2022-12-02 6:13 ` [PATCH v10 4/9] KVM: Add KVM_EXIT_MEMORY_FAULT exit Chao Peng
2022-12-06 15:47 ` Fuad Tabba
2022-12-07 15:11 ` Chao Peng
2023-01-13 23:13 ` Sean Christopherson
2022-12-02 6:13 ` [PATCH v10 5/9] KVM: Use gfn instead of hva for mmu_notifier_retry Chao Peng
2022-12-05 9:23 ` Fuad Tabba
2022-12-06 11:56 ` Chao Peng
2022-12-06 15:48 ` Fuad Tabba
2022-12-09 6:24 ` Chao Peng
2022-12-07 6:34 ` Isaku Yamahata
2022-12-07 15:14 ` Chao Peng
2022-12-02 6:13 ` [PATCH v10 6/9] KVM: Unmap existing mappings when change the memory attributes Chao Peng
2022-12-07 8:13 ` Yuan Yao
2022-12-08 11:20 ` Chao Peng
2022-12-09 5:43 ` Yuan Yao
2022-12-07 17:16 ` Fuad Tabba
2022-12-08 11:13 ` Chao Peng
2022-12-09 8:57 ` Fuad Tabba
2022-12-12 7:22 ` Chao Peng
2022-12-13 23:51 ` Huang, Kai
2022-12-19 7:54 ` Chao Peng
2023-01-13 22:50 ` Sean Christopherson
2022-12-02 6:13 ` [PATCH v10 7/9] KVM: Update lpage info when private/shared memory are mixed Chao Peng
2022-12-05 22:49 ` Isaku Yamahata
2022-12-06 12:02 ` Chao Peng
2022-12-07 6:42 ` Isaku Yamahata
2022-12-08 11:17 ` Chao Peng
2023-01-13 23:12 ` Sean Christopherson
2023-01-13 23:16 ` Sean Christopherson
2023-01-28 13:54 ` Chao Peng
2022-12-02 6:13 ` [PATCH v10 8/9] KVM: Handle page fault for private memory Chao Peng
2022-12-08 2:29 ` Yuan Yao
2022-12-08 11:23 ` Chao Peng
2022-12-09 5:45 ` Yuan Yao
2022-12-09 9:01 ` Fuad Tabba
2022-12-12 7:23 ` Chao Peng
2023-01-13 23:29 ` Sean Christopherson
2022-12-02 6:13 ` [PATCH v10 9/9] KVM: Enable and expose KVM_MEM_PRIVATE Chao Peng
2022-12-09 9:11 ` Fuad Tabba
2023-01-05 20:38 ` Vishal Annapurve
2023-01-06 4:13 ` Chao Peng
2023-01-14 0:01 ` Sean Christopherson
2023-01-17 13:12 ` Chao Peng
2023-01-17 19:35 ` Sean Christopherson
2023-01-18 8:23 ` Chao Peng
2023-01-28 14:00 ` Chao Peng
2023-03-08 0:13 ` Ackerley Tng
2023-03-08 7:40 ` Chao Peng
2023-03-23 0:41 ` Isaku Yamahata
2023-03-24 2:10 ` Chao Peng
2023-03-24 2:29 ` Xiaoyao Li
2023-03-28 10:41 ` Chao Peng
2023-04-14 21:08 ` Sean Christopherson
2023-04-18 23:38 ` Ackerley Tng
2023-04-25 23:01 ` Sean Christopherson
2023-03-07 19:14 ` Ackerley Tng
2023-03-07 20:27 ` Sean Christopherson
2023-01-14 0:37 ` [PATCH v10 0/9] KVM: mm: fd-based approach for supporting KVM Sean Christopherson
2023-01-16 13:48 ` Kirill A. Shutemov
2023-01-17 13:19 ` Chao Peng
2023-01-17 14:32 ` Fuad Tabba
2023-01-19 11:13 ` Isaku Yamahata
2023-01-19 15:25 ` Sean Christopherson
2023-01-19 22:37 ` Isaku Yamahata
2023-01-24 1:27 ` Sean Christopherson
2023-02-08 12:24 ` Isaku Yamahata
2023-02-13 13:01 ` Michael Roth
2023-02-21 12:11 ` Chao Peng
2023-03-23 1:27 ` Michael Roth
2023-03-24 2:13 ` Chao Peng
2023-04-12 22:01 ` Sean Christopherson
2023-04-17 14:37 ` Chao Peng
2023-04-17 15:01 ` Sean Christopherson
2023-01-24 16:08 ` Liam Merwick
2023-01-25 0:20 ` Sean Christopherson
2023-01-25 12:53 ` Kirill A. Shutemov
2023-01-25 16:01 ` Liam Merwick
2023-04-13 1:07 ` Sean Christopherson
2023-04-13 16:04 ` Kirill A. Shutemov
2023-02-16 5:13 ` Mike Rapoport
2023-02-16 9:41 ` David Hildenbrand
2023-02-22 21:53 ` Sean Christopherson
2023-04-17 15:40 ` Rename restrictedmem => guardedmem? (was: Re: [PATCH v10 0/9] KVM: mm: fd-based approach for supporting KVM) Sean Christopherson
2023-04-17 15:48 ` David Hildenbrand
2023-04-17 16:40 ` Sean Christopherson
2023-04-17 17:09 ` David Hildenbrand
2023-04-17 19:16 ` Sean Christopherson
2023-04-18 8:53 ` Fuad Tabba
2023-04-18 9:10 ` David Hildenbrand
2023-04-19 0:47 ` Sean Christopherson
2023-04-19 7:21 ` David Hildenbrand
2023-04-19 15:17 ` Sean Christopherson
2023-04-19 15:27 ` David Hildenbrand
2023-04-22 1:33 ` Sean Christopherson
2023-05-05 19:39 ` Ackerley Tng
2023-05-06 0:55 ` Sean Christopherson
2023-05-06 1:17 ` Vishal Annapurve
2023-05-15 23:46 ` Sean Christopherson
2023-07-13 22:46 ` Ackerley Tng
2023-07-14 19:29 ` Sean Christopherson
2023-07-14 23:09 ` Vishal Annapurve
2023-07-15 0:30 ` Sean Christopherson
2023-05-09 12:44 ` Chao Peng
2023-05-10 17:26 ` Vishal Annapurve
2023-05-10 20:23 ` Vishal Annapurve
2023-05-10 21:39 ` Sean Christopherson
2023-05-10 23:03 ` Vishal Annapurve
2023-05-11 20:22 ` Sean Christopherson
2023-05-19 1:07 ` Vishal Annapurve
2023-05-12 0:21 ` Michael Roth
2023-05-12 18:01 ` Sean Christopherson
2023-05-22 13:50 ` Michael Roth
2023-05-22 17:09 ` Sean Christopherson
2023-05-22 23:58 ` Michael Roth
2023-05-23 0:21 ` Sean Christopherson
2023-06-06 19:14 ` Ackerley Tng
2023-06-06 23:25 ` Sean Christopherson
2023-06-08 17:13 ` Ackerley Tng
2023-04-17 17:11 ` Ackerley Tng
2023-04-17 18:17 ` Sean Christopherson
2023-04-18 17:01 ` Ackerley Tng
2023-04-23 13:28 ` Jarkko Sakkinen
2023-05-05 20:00 ` David Hildenbrand
2023-05-06 7:44 ` Vlastimil Babka
2023-05-06 9:16 ` David Hildenbrand
2023-04-23 13:14 ` Jarkko Sakkinen
2022-07-06 8:20 [PATCH v7 00/14] KVM: mm: fd-based approach for supporting KVM guest private memory Chao Peng
2022-07-06 8:20 ` [PATCH v7 01/14] mm: Add F_SEAL_AUTO_ALLOCATE seal to memfd Chao Peng
2022-07-21 9:44 ` David Hildenbrand
2022-07-21 9:50 ` David Hildenbrand
2022-07-21 15:05 ` Sean Christopherson
2022-07-25 13:46 ` Chao Peng
2022-07-21 10:27 ` Gupta, Pankaj
2022-07-25 13:54 ` Chao Peng
2022-07-25 14:49 ` Gupta, Pankaj
2022-07-25 13:42 ` Chao Peng
2022-08-05 17:55 ` Paolo Bonzini
2022-08-05 18:06 ` David Hildenbrand
2022-08-10 9:40 ` Chao Peng
2022-08-10 9:38 ` Chao Peng
2022-08-17 23:41 ` Kirill A. Shutemov
2022-08-18 9:09 ` Paolo Bonzini
2022-08-23 7:36 ` David Hildenbrand
2022-08-24 10:20 ` Chao Peng
2022-08-26 15:19 ` Fuad Tabba
2022-08-29 15:18 ` Chao Peng
2022-07-06 8:20 ` [PATCH v7 02/14] selftests/memfd: Add tests for F_SEAL_AUTO_ALLOCATE Chao Peng
2022-08-05 13:11 ` David Hildenbrand
2022-07-06 8:20 ` [PATCH v7 03/14] mm: Introduce memfile_notifier Chao Peng
2022-08-05 13:22 ` David Hildenbrand
2022-08-10 9:22 ` Chao Peng
2022-08-10 10:05 ` David Hildenbrand
2022-08-10 14:38 ` Sean Christopherson
2022-08-11 12:27 ` Quentin Perret
2022-08-11 13:39 ` Chao Peng
2022-07-06 8:20 ` [PATCH v7 04/14] mm/shmem: Support memfile_notifier Chao Peng
2022-07-12 18:02 ` Gupta, Pankaj
2022-07-13 7:44 ` Chao Peng
2022-07-13 10:01 ` Gupta, Pankaj
2022-07-13 23:49 ` Chao Peng
2022-07-14 4:15 ` Gupta, Pankaj
2022-08-05 13:26 ` David Hildenbrand
2022-08-10 9:25 ` Chao Peng
2022-07-06 8:20 ` [PATCH v7 05/14] mm/memfd: Introduce MFD_INACCESSIBLE flag Chao Peng
2022-08-05 13:28 ` David Hildenbrand
2022-08-10 9:37 ` Chao Peng
2022-08-10 9:55 ` David Hildenbrand
2022-08-11 13:17 ` Chao Peng
2022-09-07 16:18 ` Kirill A. Shutemov
2022-07-06 8:20 ` [PATCH v7 06/14] KVM: Rename KVM_PRIVATE_MEM_SLOTS to KVM_INTERNAL_MEM_SLOTS Chao Peng
2022-07-06 8:20 ` [PATCH v7 07/14] KVM: Use gfn instead of hva for mmu_notifier_retry Chao Peng
2022-07-15 11:36 ` Gupta, Pankaj
2022-07-18 13:29 ` Chao Peng
2022-07-18 15:26 ` Sean Christopherson
2022-07-19 14:02 ` Chao Peng
2022-08-04 7:10 ` Isaku Yamahata
2022-08-10 8:19 ` Chao Peng
2022-07-06 8:20 ` [PATCH v7 08/14] KVM: Rename mmu_notifier_* Chao Peng
2022-07-29 19:02 ` Sean Christopherson
2022-08-03 10:13 ` Chao Peng
2022-08-05 19:54 ` Paolo Bonzini
2022-08-10 8:09 ` Chao Peng
2023-05-23 7:19 ` Kautuk Consul
2023-05-23 14:19 ` Sean Christopherson
2023-05-24 6:12 ` Kautuk Consul
2023-05-24 20:16 ` Sean Christopherson
2023-05-24 20:33 ` Peter Zijlstra
2023-05-24 21:39 ` Sean Christopherson
2023-05-25 8:54 ` Peter Zijlstra
2023-05-25 3:52 ` Kautuk Consul
2023-05-24 20:28 ` Peter Zijlstra
2022-07-06 8:20 ` [PATCH v7 09/14] KVM: Extend the memslot to support fd-based private memory Chao Peng
2022-07-29 19:51 ` Sean Christopherson
2022-08-03 10:08 ` Chao Peng
2022-08-03 14:42 ` Sean Christopherson
2022-07-06 8:20 ` [PATCH v7 10/14] KVM: Add KVM_EXIT_MEMORY_FAULT exit Chao Peng
2022-07-06 8:20 ` [PATCH v7 11/14] KVM: Register/unregister the guest private memory regions Chao Peng
2022-07-19 8:00 ` Gupta, Pankaj
2022-07-19 14:08 ` Chao Peng
2022-07-19 14:23 ` Gupta, Pankaj
2022-07-20 15:07 ` Chao Peng
2022-07-20 15:31 ` Gupta, Pankaj
2022-07-20 16:21 ` Sean Christopherson
2022-07-20 17:41 ` Gupta, Pankaj
2022-07-21 7:34 ` Wei Wang
2022-07-21 9:29 ` Chao Peng
2022-07-21 17:58 ` Sean Christopherson
2022-07-25 13:04 ` Chao Peng
2022-07-29 19:54 ` Sean Christopherson
2022-08-02 0:49 ` Sean Christopherson
2022-08-02 16:38 ` Sean Christopherson
2022-08-03 9:48 ` Chao Peng
2022-08-03 15:51 ` Sean Christopherson
2022-08-04 7:58 ` Chao Peng
2022-07-20 16:44 ` Sean Christopherson
2022-07-21 9:37 ` Chao Peng
2022-08-19 19:37 ` Vishal Annapurve
2022-08-24 10:37 ` Chao Peng
2022-08-26 15:19 ` Fuad Tabba
2022-08-29 15:21 ` Chao Peng
2022-07-06 8:20 ` [PATCH v7 12/14] KVM: Handle page fault for private memory Chao Peng
2022-07-29 20:58 ` Sean Christopherson
2022-08-03 9:52 ` Chao Peng
2022-07-06 8:20 ` [PATCH v7 13/14] KVM: Enable and expose KVM_MEM_PRIVATE Chao Peng
2022-07-19 9:55 ` Gupta, Pankaj
2022-07-19 14:12 ` Chao Peng
2022-07-06 8:20 ` [PATCH v7 14/14] memfd_create.2: Describe MFD_INACCESSIBLE flag Chao Peng
2022-08-01 14:40 ` Dave Hansen
2022-08-03 9:53 ` Chao Peng
2022-07-13 3:58 ` [PATCH v7 00/14] KVM: mm: fd-based approach for supporting KVM guest private memory Gupta, Pankaj
2022-07-13 7:57 ` Chao Peng
2022-07-13 10:35 ` Gupta, Pankaj
2022-07-13 23:59 ` Chao Peng
2022-07-14 4:39 ` Gupta, Pankaj
2022-07-14 5:06 ` Gupta, Pankaj
2022-07-14 4:29 ` Andy Lutomirski
2022-07-14 5:13 ` Gupta, Pankaj
2022-08-11 10:02 ` Nikunj A. Dadhania
2022-08-11 11:30 ` Gupta, Pankaj
2022-08-11 13:32 ` Chao Peng
2022-08-11 17:28 ` Nikunj A. Dadhania
2022-08-12 3:22 ` Nikunj A. Dadhania
2022-08-11 17:18 ` Nikunj A. Dadhania
2022-08-11 23:02 ` Gupta, Pankaj
2022-08-12 6:02 ` Gupta, Pankaj
2022-08-12 7:18 ` Gupta, Pankaj
2022-08-12 8:48 ` Nikunj A. Dadhania
2022-08-12 9:33 ` Gupta, Pankaj
2022-08-15 13:04 ` Chao Peng
2022-08-16 4:28 ` Nikunj A. Dadhania
2022-08-16 11:33 ` Gupta, Pankaj
2022-08-16 12:24 ` Kirill A . Shutemov
2022-08-16 13:03 ` Gupta, Pankaj
2022-08-16 15:38 ` Sean Christopherson
2022-08-17 15:27 ` Michael Roth
2022-08-23 1:25 ` Isaku Yamahata
2022-08-23 17:41 ` Gupta, Pankaj
2022-08-18 5:40 ` Hugh Dickins
2022-08-18 13:24 ` Kirill A . Shutemov
2022-08-19 0:20 ` Sean Christopherson
2022-08-19 3:38 ` Hugh Dickins
2022-08-19 22:53 ` Sean Christopherson
2022-08-23 7:55 ` David Hildenbrand
2022-08-23 16:05 ` Sean Christopherson
2022-08-24 9:41 ` Chao Peng
2022-09-09 4:55 ` Andy Lutomirski
2022-08-19 3:00 ` Hugh Dickins
2022-08-20 0:27 ` Kirill A. Shutemov
2022-08-21 5:15 ` Hugh Dickins
2022-08-31 14:24 ` Kirill A . Shutemov
2022-09-02 10:27 ` Chao Peng
2022-09-02 12:30 ` Kirill A . Shutemov
2022-09-08 1:10 ` Kirill A. Shutemov
2022-09-13 9:44 ` Sean Christopherson
2022-09-13 13:28 ` Kirill A. Shutemov
2022-09-13 14:53 ` Sean Christopherson
2022-09-13 16:00 ` Kirill A. Shutemov
2022-09-13 16:12 ` Sean Christopherson
2022-09-09 4:48 ` Andy Lutomirski
2022-09-09 14:32 ` Kirill A . Shutemov
2022-09-09 19:11 ` Andy Lutomirski
2022-09-09 23:02 ` Kirill A . Shutemov
2022-08-21 10:27 ` Matthew Wilcox
2022-08-24 10:27 ` Chao Peng
2022-09-09 4:44 ` Andy Lutomirski
2022-08-26 15:19 ` Fuad Tabba
2022-08-29 15:17 ` Chao Peng
2022-08-31 9:12 ` Fuad Tabba
2022-09-02 10:19 ` Chao Peng
2022-09-09 15:35 ` Michael Roth
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