From: Philippe Mathieu-Daudé <f4...@amsat.org>
Initialize 'oldlevel' early to avoid on Debian/sid:
FAILED: libqemu-x86_64-softmmu.fa.p/hw_i386_amd_iommu.c.o
In function 'pte_get_page_mask',
inlined from 'amdvi_page_walk' at hw/i386/amd_iommu.c:945:25,
inlined from 'amdvi_do_translate' at hw/i386/amd_iommu.c:989:5,
inlined from 'amdvi_translate' at hw/i386/amd_iommu.c:1038:5:
hw/i386/amd_iommu.c:877:38: error: 'oldlevel' may be used uninitialized
[-Werror=maybe-uninitialized]
877 | return ~((1UL << ((oldlevel * 9) + 3)) - 1);
| ~~~~~~~~~~~~~~~~^~~~
hw/i386/amd_iommu.c: In function 'amdvi_translate':
hw/i386/amd_iommu.c:906:41: note: 'oldlevel' was declared here
906 | unsigned level, present, pte_perms, oldlevel;
| ^~~~~~~~
cc1: all warnings being treated as errors
Having:
$ gcc --version
gcc (Debian 12-20220313-1) 12.0.1 20220314 (experimental)
Signed-off-by: Philippe Mathieu-Daudé <f4...@amsat.org>
---
hw/i386/amd_iommu.c | 1 +
1 file changed, 1 insertion(+)
diff --git a/hw/i386/amd_iommu.c b/hw/i386/amd_iommu.c
index 4d13d8e697..b6d299f964 100644
--- a/hw/i386/amd_iommu.c
+++ b/hw/i386/amd_iommu.c
@@ -904,6 +904,7 @@ static void amdvi_page_walk(AMDVIAddressSpace *as, uint64_t
*dte,
/* make sure the DTE has TV = 1 */
if (pte & AMDVI_DEV_TRANSLATION_VALID) {
level = get_pte_translation_mode(pte);
+ oldlevel = level;
if (level >= 7) {
trace_amdvi_mode_invalid(level, addr);
return;
--
2.35.1
