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powerpc/xive: add OPAL extensions for the XIVE native exploitation support

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The support for XIVE native exploitation mode in Linux/KVM needs a
couple more OPAL calls to get and set the state of the XIVE internal
structures being used by a sPAPR guest.

Signed-off-by: Cédric Le Goater <clg@kaod.org>
Reviewed-by: David Gibson <david@gibson.dropbear.id.au>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
This commit is contained in:
Cédric Le Goater
2019-04-10 19:04:33 +02:00
committed by Michael Ellerman
parent 8c2ffd9174
commit 88ec6b93c8
5 changed files with 127 additions and 3 deletions
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99
arch/powerpc/sysdev/xive/native.c
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@@ -437,6 +437,12 @@ void xive_native_sync_source(u32 hw_irq)
}
EXPORT_SYMBOL_GPL(xive_native_sync_source);
void xive_native_sync_queue(u32 hw_irq)
{
opal_xive_sync(XIVE_SYNC_QUEUE, hw_irq);
}
EXPORT_SYMBOL_GPL(xive_native_sync_queue);
static const struct xive_ops xive_native_ops = {
.populate_irq_data = xive_native_populate_irq_data,
.configure_irq = xive_native_configure_irq,
@@ -711,3 +717,96 @@ bool xive_native_has_single_escalation(void)
return xive_has_single_esc;
}
EXPORT_SYMBOL_GPL(xive_native_has_single_escalation);
int xive_native_get_queue_info(u32 vp_id, u32 prio,
u64 *out_qpage,
u64 *out_qsize,
u64 *out_qeoi_page,
u32 *out_escalate_irq,
u64 *out_qflags)
{
__be64 qpage;
__be64 qsize;
__be64 qeoi_page;
__be32 escalate_irq;
__be64 qflags;
s64 rc;
rc = opal_xive_get_queue_info(vp_id, prio, &qpage, &qsize,
&qeoi_page, &escalate_irq, &qflags);
if (rc) {
pr_err("OPAL failed to get queue info for VCPU %d/%d : %lld\n",
vp_id, prio, rc);
return -EIO;
}
if (out_qpage)
*out_qpage = be64_to_cpu(qpage);
if (out_qsize)
*out_qsize = be32_to_cpu(qsize);
if (out_qeoi_page)
*out_qeoi_page = be64_to_cpu(qeoi_page);
if (out_escalate_irq)
*out_escalate_irq = be32_to_cpu(escalate_irq);
if (out_qflags)
*out_qflags = be64_to_cpu(qflags);
return 0;
}
EXPORT_SYMBOL_GPL(xive_native_get_queue_info);
int xive_native_get_queue_state(u32 vp_id, u32 prio, u32 *qtoggle, u32 *qindex)
{
__be32 opal_qtoggle;
__be32 opal_qindex;
s64 rc;
rc = opal_xive_get_queue_state(vp_id, prio, &opal_qtoggle,
&opal_qindex);
if (rc) {
pr_err("OPAL failed to get queue state for VCPU %d/%d : %lld\n",
vp_id, prio, rc);
return -EIO;
}
if (qtoggle)
*qtoggle = be32_to_cpu(opal_qtoggle);
if (qindex)
*qindex = be32_to_cpu(opal_qindex);
return 0;
}
EXPORT_SYMBOL_GPL(xive_native_get_queue_state);
int xive_native_set_queue_state(u32 vp_id, u32 prio, u32 qtoggle, u32 qindex)
{
s64 rc;
rc = opal_xive_set_queue_state(vp_id, prio, qtoggle, qindex);
if (rc) {
pr_err("OPAL failed to set queue state for VCPU %d/%d : %lld\n",
vp_id, prio, rc);
return -EIO;
}
return 0;
}
EXPORT_SYMBOL_GPL(xive_native_set_queue_state);
int xive_native_get_vp_state(u32 vp_id, u64 *out_state)
{
__be64 state;
s64 rc;
rc = opal_xive_get_vp_state(vp_id, &state);
if (rc) {
pr_err("OPAL failed to get vp state for VCPU %d : %lld\n",
vp_id, rc);
return -EIO;
}
if (out_state)
*out_state = be64_to_cpu(state);
return 0;
}
EXPORT_SYMBOL_GPL(xive_native_get_vp_state);