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vfio/ap: Pass in physical address of ind to ap_aqic()

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The ap_aqic() is called by vfio_ap_irq_enable() where it passes in a
virt value that's casted from a physical address "h_nib". Inside the
ap_aqic(), it does virt_to_phys() again.

Since ap_aqic() needs a physical address, let's just pass in a pa of
ind directly. So change the "ind" to "pa_ind".

Reviewed-by: Harald Freudenberger <freude@linux.ibm.com>
Reviewed-by: Jason Gunthorpe <jgg@nvidia.com>
Tested-by: Eric Farman <farman@linux.ibm.com>
Signed-off-by: Nicolin Chen <nicolinc@nvidia.com>
Link: https://lore.kernel.org/r/20220723020256.30081-4-nicolinc@nvidia.com
Signed-off-by: Alex Williamson <alex.williamson@redhat.com>
This commit is contained in:
Nicolin Chen 2022-07-22 19:02:49 -07:00 committed by Alex Williamson
parent 2c9e8c0110
commit 10e19d492a
3 changed files with 8 additions and 7 deletions
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6
arch/s390/include/asm/ap.h
View file

@ -227,13 +227,13 @@ struct ap_qirq_ctrl {
* ap_aqic(): Control interruption for a specific AP.
* @qid: The AP queue number
* @qirqctrl: struct ap_qirq_ctrl (64 bit value)
* @ind: The notification indicator byte
* @pa_ind: Physical address of the notification indicator byte
*
* Returns AP queue status.
*/
static inline struct ap_queue_status ap_aqic(ap_qid_t qid,
struct ap_qirq_ctrl qirqctrl,
void *ind)
phys_addr_t pa_ind)
{
unsigned long reg0 = qid | (3UL << 24); /* fc 3UL is AQIC */
union {
@ -241,7 +241,7 @@ static inline struct ap_queue_status ap_aqic(ap_qid_t qid,
struct ap_qirq_ctrl qirqctrl;
struct ap_queue_status status;
} reg1;
unsigned long reg2 = virt_to_phys(ind);
unsigned long reg2 = pa_ind;
reg1.qirqctrl = qirqctrl;

2
drivers/s390/crypto/ap_queue.c
View file

@ -34,7 +34,7 @@ static int ap_queue_enable_irq(struct ap_queue *aq, void *ind)
qirqctrl.ir = 1;
qirqctrl.isc = AP_ISC;
status = ap_aqic(aq->qid, qirqctrl, ind);
status = ap_aqic(aq->qid, qirqctrl, virt_to_phys(ind));
switch (status.response_code) {
case AP_RESPONSE_NORMAL:
case AP_RESPONSE_OTHERWISE_CHANGED:

7
drivers/s390/crypto/vfio_ap_ops.c
View file

@ -154,7 +154,7 @@ static struct ap_queue_status vfio_ap_irq_disable(struct vfio_ap_queue *q)
int retries = 5;
do {
status = ap_aqic(q->apqn, aqic_gisa, NULL);
status = ap_aqic(q->apqn, aqic_gisa, 0);
switch (status.response_code) {
case AP_RESPONSE_OTHERWISE_CHANGED:
case AP_RESPONSE_NORMAL:
@ -245,7 +245,8 @@ static struct ap_queue_status vfio_ap_irq_enable(struct vfio_ap_queue *q,
struct kvm_s390_gisa *gisa;
int nisc;
struct kvm *kvm;
unsigned long h_nib, g_pfn, h_pfn;
unsigned long g_pfn, h_pfn;
phys_addr_t h_nib;
int ret;
/* Verify that the notification indicator byte address is valid */
@ -290,7 +291,7 @@ static struct ap_queue_status vfio_ap_irq_enable(struct vfio_ap_queue *q,
aqic_gisa.ir = 1;
aqic_gisa.gisa = (uint64_t)gisa >> 4;
status = ap_aqic(q->apqn, aqic_gisa, (void *)h_nib);
status = ap_aqic(q->apqn, aqic_gisa, h_nib);
switch (status.response_code) {
case AP_RESPONSE_NORMAL:
/* See if we did clear older IRQ configuration */