kamkow1/Limine
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

sys/iommu: Remove VT-d polling timeout and fix poll loop order

Browse Source
This commit is contained in:
Mintsuki
2026-02-23 19:31:08 +01:00
parent c5c2e7909e
commit 57188a10d8
1 changed files with 3 additions and 17 deletions
Download Patch File Download Diff File Expand all files Collapse all files

20
common/sys/iommu.c
View File

@@ -27,8 +27,6 @@
// All other bits (TE, EAFL, QIE, IRE, CFI) are persistent toggles.
#define VTD_GCMD_ONESHOT_MASK 0x96FFFFFF
#define VTD_TIMEOUT 10000000
static void vtd_disable_unit(uintptr_t reg_base) {
uint32_t sts = mmind(reg_base + VTD_GSTS_REG);
@@ -37,12 +35,8 @@ static void vtd_disable_unit(uintptr_t reg_base) {
uint32_t gcmd = (sts & VTD_GCMD_ONESHOT_MASK) & ~VTD_GSTS_TES;
mmoutd(reg_base + VTD_GCMD_REG, gcmd);
for (int i = 0; i < VTD_TIMEOUT; i++) {
while ((sts = mmind(reg_base + VTD_GSTS_REG)) & VTD_GSTS_TES) {
asm volatile ("pause");
sts = mmind(reg_base + VTD_GSTS_REG);
if (!(sts & VTD_GSTS_TES)) {
break;
}
}
}
@@ -51,12 +45,8 @@ static void vtd_disable_unit(uintptr_t reg_base) {
uint32_t gcmd = (sts & VTD_GCMD_ONESHOT_MASK) & ~VTD_GSTS_IRES;
mmoutd(reg_base + VTD_GCMD_REG, gcmd);
for (int i = 0; i < VTD_TIMEOUT; i++) {
while ((sts = mmind(reg_base + VTD_GSTS_REG)) & VTD_GSTS_IRES) {
asm volatile ("pause");
sts = mmind(reg_base + VTD_GSTS_REG);
if (!(sts & VTD_GSTS_IRES)) {
break;
}
}
}
@@ -65,12 +55,8 @@ static void vtd_disable_unit(uintptr_t reg_base) {
uint32_t gcmd = (sts & VTD_GCMD_ONESHOT_MASK) & ~VTD_GSTS_QIES;
mmoutd(reg_base + VTD_GCMD_REG, gcmd);
for (int i = 0; i < VTD_TIMEOUT; i++) {
while ((sts = mmind(reg_base + VTD_GSTS_REG)) & VTD_GSTS_QIES) {
asm volatile ("pause");
sts = mmind(reg_base + VTD_GSTS_REG);
if (!(sts & VTD_GSTS_QIES)) {
break;
}
}
}
}