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[PATCH] target/i386: Change unavail from u32 to u64


From: Xiong Zhang
Subject: [PATCH] target/i386: Change unavail from u32 to u64
Date: Tue, 30 Jul 2024 16:29:27 +0800

The feature word 'r' is a u64, and "unavail" is a u32, the operation
'r &= ~unavail' clears the high 32 bits of 'r'. This causes many vmx cases
in kvm-unit-tests to fail. Changing 'unavail' from u32 to u64 fixes this
issue.

Bugzilla: https://gitlab.com/qemu-project/qemu/-/issues/2442
Fixes: 0b2757412cb1 ("target/i386: drop AMD machine check bits from Intel 
CPUID")
Signed-off-by: Xiong Zhang <xiong.y.zhang@linux.intel.com>
---
 target/i386/cpu.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/target/i386/cpu.c b/target/i386/cpu.c
index 4688d140c2..ef06da54c6 100644
--- a/target/i386/cpu.c
+++ b/target/i386/cpu.c
@@ -6039,7 +6039,7 @@ uint64_t x86_cpu_get_supported_feature_word(X86CPU *cpu, 
FeatureWord w)
 {
     FeatureWordInfo *wi = &feature_word_info[w];
     uint64_t r = 0;
-    uint32_t unavail = 0;
+    uint64_t unavail = 0;
 
     if (kvm_enabled()) {
         switch (wi->type) {
-- 
2.40.1




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