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qemu-system-x86-64-headless: add patch to fix MMU bug (#7935)

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Zerogoki00 2021-11-06 11:33:02 +03:00 committed by GitHub
parent a7901ee3eb
commit 10fa08e865
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1 changed files with 37 additions and 0 deletions
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37
packages/qemu-system-x86-64-headless/0017-fix-i386-mmu.patch Normal file
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@ -0,0 +1,37 @@
--- qemu-6.1.0/target/i386/tcg/sysemu/excp_helper.c
+++ qemu-6.1.0/target/i386/tcg/sysemu/excp_helper.c
@@ -94,15 +94,6 @@ static int mmu_translate(CPUState *cs, hwaddr addr, MMUTranslateFunc get_hphys_f
bool la57 = pg_mode & PG_MODE_LA57;
uint64_t pml5e_addr, pml5e;
uint64_t pml4e_addr, pml4e;
- int32_t sext;
-
- /* test virtual address sign extension */
- sext = la57 ? (int64_t)addr >> 56 : (int64_t)addr >> 47;
- if (get_hphys_func && sext != 0 && sext != -1) {
- env->error_code = 0;
- cs->exception_index = EXCP0D_GPF;
- return 1;
- }
if (la57) {
pml5e_addr = ((cr3 & ~0xfff) +
@@ -423,6 +414,18 @@ static int handle_mmu_fault(CPUState *cs, vaddr addr, int size,
page_size = 4096;
} else {
pg_mode = get_pg_mode(env);
+ if (pg_mode & PG_MODE_LMA) {
+ int32_t sext;
+
+ /* test virtual address sign extension */
+ sext = (int64_t)addr >> (pg_mode & PG_MODE_LA57 ? 56 : 47);
+ if (sext != 0 && sext != -1) {
+ env->error_code = 0;
+ cs->exception_index = EXCP0D_GPF;
+ return 1;
+ }
+ }
+
error_code = mmu_translate(cs, addr, get_hphys, env->cr[3], is_write1,
mmu_idx, pg_mode,
&paddr, &page_size, &prot);