Merge tag 'uml-for-linux-6.19-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/uml/linux

Pull UML updates from Johannes Berg:
 "Apart from the usual small churn, we have

   - initial SMP support (only kernel)

   - major vDSO cleanups (and fixes for 32-bit)"

* tag 'uml-for-linux-6.19-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/uml/linux: (33 commits)
  um: Disable KASAN_INLINE when STATIC_LINK is selected
  um: Don't rename vmap to kernel_vmap
  um: drivers: virtio: use string choices helper
  um: Always set up AT_HWCAP and AT_PLATFORM
  x86/um: Remove FIXADDR_USER_START and FIXADDR_USE_END
  um: Remove __access_ok_vsyscall()
  um: Remove redundant range check from __access_ok_vsyscall()
  um: Remove fixaddr_user_init()
  x86/um: Drop gate area handling
  x86/um: Do not inherit vDSO from host
  um: Split out default elf_aux_hwcap
  x86/um: Move ELF_PLATFORM fallback to x86-specific code
  um: Split out default elf_aux_platform
  um: Avoid circular dependency on asm-offsets in pgtable.h
  um: Enable SMP support on x86
  asm-generic: percpu: Add assembly guard
  um: vdso: Remove getcpu support on x86
  um: Add initial SMP support
  um: Define timers on a per-CPU basis
  um: Determine sleep based on need_resched()
  ...

1 files changed, 4 insertions, 50 deletions

diff --git a/arch/um/os-Linux/start_up.c b/arch/um/os-Linux/start_up.c
index a827c2e01aa5..054ac03bbf5e 100644
--- a/arch/um/os-Linux/start_up.c
+++ b/arch/um/os-Linux/start_up.c
@@ -22,6 +22,7 @@
 #include <asm/unistd.h>
 #include <init.h>
 #include <os.h>
+#include <smp.h>
 #include <kern_util.h>
 #include <mem_user.h>
 #include <ptrace_user.h>
@@ -481,6 +482,9 @@ void __init os_early_checks(void)
 			fatal("SECCOMP userspace requested but not functional!\n");
 	}
 
+	if (uml_ncpus > 1)
+		fatal("SMP is not supported with PTRACE userspace.\n");
+
 	using_seccomp = 0;
 	check_ptrace();
 
@@ -489,53 +493,3 @@ void __init os_early_checks(void)
 		fatal("Failed to initialize default registers");
 	stop_ptraced_child(pid, 1);
 }
-
-int __init parse_iomem(char *str, int *add)
-{
-	struct iomem_region *new;
-	struct stat64 buf;
-	char *file, *driver;
-	int fd, size;
-
-	driver = str;
-	file = strchr(str,',');
-	if (file == NULL) {
-		os_warn("parse_iomem : failed to parse iomem\n");
-		goto out;
-	}
-	*file = '\0';
-	file++;
-	fd = open(file, O_RDWR, 0);
-	if (fd < 0) {
-		perror("parse_iomem - Couldn't open io file");
-		goto out;
-	}
-
-	if (fstat64(fd, &buf) < 0) {
-		perror("parse_iomem - cannot stat_fd file");
-		goto out_close;
-	}
-
-	new = malloc(sizeof(*new));
-	if (new == NULL) {
-		perror("Couldn't allocate iomem_region struct");
-		goto out_close;
-	}
-
-	size = (buf.st_size + UM_KERN_PAGE_SIZE) & ~(UM_KERN_PAGE_SIZE - 1);
-
-	*new = ((struct iomem_region) { .next		= iomem_regions,
-					.driver		= driver,
-					.fd		= fd,
-					.size		= size,
-					.phys		= 0,
-					.virt		= 0 });
-	iomem_regions = new;
-	iomem_size += new->size + UM_KERN_PAGE_SIZE;
-
-	return 0;
- out_close:
-	close(fd);
- out:
-	return 1;
-}