Am 07.11.22 um 09:57 schrieb Nico Boehr:
Fix virtual vs physical address confusion (which currently are the same).
In chsc_sgib(), do the virtual-physical conversion in the caller since
the caller needs to make sure it is a 31-bit address and zero has a
special meaning (disassociating the GIB).
Signed-off-by: Nico Boehr <nrb@xxxxxxxxxxxxx>
Looks good to me!
Reviewed-by: Michael Mueller <mimu@xxxxxxxxxxxxx>
---
arch/s390/kvm/interrupt.c | 11 +++++++----
1 file changed, 7 insertions(+), 4 deletions(-)
diff --git a/arch/s390/kvm/interrupt.c b/arch/s390/kvm/interrupt.c
index ab569faf0df2..ae018217eac8 100644
--- a/arch/s390/kvm/interrupt.c
+++ b/arch/s390/kvm/interrupt.c
@@ -3104,9 +3104,9 @@ static enum hrtimer_restart gisa_vcpu_kicker(struct hrtimer *timer)
static void process_gib_alert_list(void)
{
struct kvm_s390_gisa_interrupt *gi;
+ u32 final, gisa_phys, origin = 0UL;
struct kvm_s390_gisa *gisa;
struct kvm *kvm;
- u32 final, origin = 0UL;
do {
/*
@@ -3132,9 +3132,10 @@ static void process_gib_alert_list(void)
* interruptions asap.
*/
while (origin & GISA_ADDR_MASK) {
- gisa = (struct kvm_s390_gisa *)(u64)origin;
+ gisa_phys = origin;
+ gisa = phys_to_virt(gisa_phys);
origin = gisa->next_alert;
- gisa->next_alert = (u32)(u64)gisa;
+ gisa->next_alert = gisa_phys;
kvm = container_of(gisa, struct sie_page2, gisa)->kvm;
gi = &kvm->arch.gisa_int;
if (hrtimer_active(&gi->timer))
@@ -3418,6 +3419,7 @@ void kvm_s390_gib_destroy(void)
int kvm_s390_gib_init(u8 nisc)
{
+ u32 gib_origin;
int rc = 0;
if (!css_general_characteristics.aiv) {
@@ -3439,7 +3441,8 @@ int kvm_s390_gib_init(u8 nisc)
}
gib->nisc = nisc;
- if (chsc_sgib((u32)(u64)gib)) {
+ gib_origin = virt_to_phys(gib);
+ if (chsc_sgib(gib_origin)) {
pr_err("Associating the GIB with the AIV facility failed\n");
free_page((unsigned long)gib);
gib = NULL;
