mirror of
https://gitlab.com/qemu-project/qemu
synced 2024-09-06 01:43:39 +00:00
![Marc-André Lureau](/assets/img/avatar_default.png)
Signed-off-by: Marc-André Lureau <marcandre.lureau@redhat.com> Message-Id: <20220323155743.1585078-33-marcandre.lureau@redhat.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
54 lines
1.6 KiB
C
54 lines
1.6 KiB
C
/*
|
|
* Variable page size handling -- target independent part.
|
|
*
|
|
* Copyright (c) 2003 Fabrice Bellard
|
|
*
|
|
* This library is free software; you can redistribute it and/or
|
|
* modify it under the terms of the GNU Lesser General Public
|
|
* License as published by the Free Software Foundation; either
|
|
* version 2.1 of the License, or (at your option) any later version.
|
|
*
|
|
* This library is distributed in the hope that it will be useful,
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
|
|
* Lesser General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU Lesser General Public
|
|
* License along with this library; if not, see <http://www.gnu.org/licenses/>.
|
|
*/
|
|
|
|
#define IN_PAGE_VARY 1
|
|
|
|
#include "qemu/osdep.h"
|
|
#include "exec/page-vary.h"
|
|
|
|
/* WARNING: This file must *not* be complied with -flto. */
|
|
|
|
TargetPageBits target_page;
|
|
|
|
bool set_preferred_target_page_bits_common(int bits)
|
|
{
|
|
/*
|
|
* The target page size is the lowest common denominator for all
|
|
* the CPUs in the system, so we can only make it smaller, never
|
|
* larger. And we can't make it smaller once we've committed to
|
|
* a particular size.
|
|
*/
|
|
if (target_page.bits == 0 || target_page.bits > bits) {
|
|
if (target_page.decided) {
|
|
return false;
|
|
}
|
|
target_page.bits = bits;
|
|
}
|
|
return true;
|
|
}
|
|
|
|
void finalize_target_page_bits_common(int min)
|
|
{
|
|
if (target_page.bits == 0) {
|
|
target_page.bits = min;
|
|
}
|
|
target_page.mask = -1ull << target_page.bits;
|
|
target_page.decided = true;
|
|
}
|