libxc: Do not use dom0 physmem as parameter to lzma decoder

It's not clear why a userspace lzma decode would want to use that
particular value, what bearing it has on anything or why it would
assume it could use 1/3 of the total RAM in the system (potentially
quite a large amount of RAM) as opposed to any other limit number.

Instead, hardcode 32Mby.

This reverts 22830:c80960244942, removes the xc_get_physmem/physmem
function entirely, and replaces the expression at the call site with a
fixed constant.

Signed-off-by: Ian Jackson <ian.jackson@eu.citrix.com>
Acked-by: Ian Campbell <Ian.Campbell@eu.citrix.com>
Cc: Christoph Egger <Christoph.Egger@amd.com>
Committed-by: Ian Jackson <ian.jackson@eu.citrix.com>

1 files changed, 0 insertions, 21 deletions

diff --git a/tools/libxc/xc_netbsd.c b/tools/libxc/xc_netbsd.c
index 76d80595e8..8c82e36645 100644
--- a/tools/libxc/xc_netbsd.c
+++ b/tools/libxc/xc_netbsd.c
@@ -23,9 +23,6 @@
 #include <xen/sys/evtchn.h>
 #include <unistd.h>
 #include <fcntl.h>
-#include <stdio.h>
-#include <errno.h>
-#include <sys/sysctl.h>
 
 static xc_osdep_handle netbsd_privcmd_open(xc_interface *xch)
 {
@@ -354,24 +351,6 @@ void discard_file_cache(xc_interface *xch, int fd, int flush)
     errno = saved_errno;
 }
 
-uint64_t xc_get_physmem(void)
-{
-    int mib[2], rc;
-    size_t len;
-    uint64_t physmem;
-
-    mib[0] = CTL_HW;
-    mib[1] = HW_PHYSMEM64;
-    rc = sysctl(mib, 2, &physmem, &len, NULL, 0);
-
-    if (rc == -1) {
-        /* PERROR("%s: Failed to get hw.physmem64: %s\n", strerror(errno)); */
-        return 0;
-    }
-
-    return physmem;
-}
-
 static struct xc_osdep_ops *netbsd_osdep_init(xc_interface *xch, enum xc_osdep_type type)
 {
     switch ( type )