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[Qemu-devel] [PATCH 12/15] pseries: Split xics irq configuration from st
From: |
David Gibson |
Subject: |
[Qemu-devel] [PATCH 12/15] pseries: Split xics irq configuration from state information |
Date: |
Thu, 18 Oct 2012 16:50:34 +1100 |
Currently the XICS irq controller code has a per-irq state structure which
amongst other things includes whether the interrupt is level or message
triggered - this is configured by the platform code, and is not directly
visible to the guest. This leads to a slightly awkward construct at reset
time where we need to reset everything in the state structure _except_ the
lsi/msi flag, which needs to retain the information given at platform init
time.
More importantly this flag will make matching the qemu state to the KVM
state for the upcoming in-kernel XICS implementation more awkward. This
patch, therefore, removes this flag from the per-irq state structure,
instead adding a parallel array giving the lsi/msi configuration per irq.
Signed-off-by: David Gibson <address@hidden>
---
hw/xics.c | 20 ++++++++------------
1 file changed, 8 insertions(+), 12 deletions(-)
diff --git a/hw/xics.c b/hw/xics.c
index 403afdb..5e20f0f 100644
--- a/hw/xics.c
+++ b/hw/xics.c
@@ -179,13 +179,13 @@ struct ics_irq_state {
#define XICS_STATUS_REJECTED 0x4
#define XICS_STATUS_MASKED_PENDING 0x8
uint8_t status;
- bool lsi;
};
struct ics_state {
int nr_irqs;
int offset;
qemu_irq *qirqs;
+ bool *islsi;
struct ics_irq_state *irqs;
struct icp_state *icp;
};
@@ -254,9 +254,8 @@ static void set_irq_lsi(struct ics_state *ics, int srcno,
int val)
static void ics_set_irq(void *opaque, int srcno, int val)
{
struct ics_state *ics = (struct ics_state *)opaque;
- struct ics_irq_state *irq = ics->irqs + srcno;
- if (irq->lsi) {
+ if (ics->islsi[srcno]) {
set_irq_lsi(ics, srcno, val);
} else {
set_irq_msi(ics, srcno, val);
@@ -293,7 +292,7 @@ static void ics_write_xive(struct ics_state *ics, int nr,
int server,
trace_xics_ics_write_xive(nr, srcno, server, priority);
- if (irq->lsi) {
+ if (ics->islsi[srcno]) {
write_xive_lsi(ics, srcno);
} else {
write_xive_msi(ics, srcno);
@@ -314,10 +313,8 @@ static void ics_resend(struct ics_state *ics)
int i;
for (i = 0; i < ics->nr_irqs; i++) {
- struct ics_irq_state *irq = ics->irqs + i;
-
/* FIXME: filter by server#? */
- if (irq->lsi) {
+ if (ics->islsi[i]) {
resend_lsi(ics, i);
} else {
resend_msi(ics, i);
@@ -332,7 +329,7 @@ static void ics_eoi(struct ics_state *ics, int nr)
trace_xics_ics_eoi(nr);
- if (irq->lsi) {
+ if (ics->islsi[srcno]) {
irq->status &= ~XICS_STATUS_SENT;
}
}
@@ -354,7 +351,7 @@ void xics_set_irq_type(struct icp_state *icp, int irq, bool
lsi)
{
assert(ics_valid_irq(icp->ics, irq));
- icp->ics->irqs[irq - icp->ics->offset].lsi = lsi;
+ icp->ics->islsi[irq - icp->ics->offset] = lsi;
}
static target_ulong h_cppr(CPUPPCState *env, sPAPREnvironment *spapr,
@@ -515,10 +512,8 @@ static void xics_reset(void *opaque)
qemu_set_irq(icp->ss[i].output, 0);
}
+ memset(ics->irqs, 0, sizeof(struct ics_irq_state) * ics->nr_irqs);
for (i = 0; i < ics->nr_irqs; i++) {
- /* Reset everything *except* the type */
- ics->irqs[i].server = 0;
- ics->irqs[i].status = 0;
ics->irqs[i].priority = 0xff;
ics->irqs[i].saved_priority = 0xff;
}
@@ -559,6 +554,7 @@ struct icp_state *xics_system_init(int nr_servers, int
nr_irqs)
ics->nr_irqs = nr_irqs;
ics->offset = XICS_IRQ_BASE;
ics->irqs = g_malloc0(nr_irqs * sizeof(struct ics_irq_state));
+ ics->islsi = g_malloc0(nr_irqs * sizeof(bool));
icp->ics = ics;
ics->icp = icp;
--
1.7.10.4
- [Qemu-devel] [0/15] pseries patch queue, David Gibson, 2012/10/18
- [Qemu-devel] [PATCH 05/15] pseries: Clean up inconsistent variable name in xics.c, David Gibson, 2012/10/18
- [Qemu-devel] [PATCH 01/15] pseries: Don't allow duplicate registration of hcalls or RTAS calls, David Gibson, 2012/10/18
- [Qemu-devel] [PATCH 09/15] pseries: Return the token when we register an RTAS call, David Gibson, 2012/10/18
- [Qemu-devel] [PATCH 10/15] pseries: Allow RTAS tokens without a qemu handler, David Gibson, 2012/10/18
- [Qemu-devel] [PATCH 06/15] pseries: Use #define for XICS base irq number, David Gibson, 2012/10/18
- [Qemu-devel] [PATCH 02/15] target-ppc: Rework storage of VPA registration state, David Gibson, 2012/10/18
- [Qemu-devel] [PATCH 07/15] pseries: Cleanup duplications of ics_valid_irq() code, David Gibson, 2012/10/18
- [Qemu-devel] [PATCH 12/15] pseries: Split xics irq configuration from state information,
David Gibson <=
- [Qemu-devel] [PATCH 11/15] pseries: Add tracepoints to the XICS interrupt controller, David Gibson, 2012/10/18
- [Qemu-devel] [PATCH 04/15] target-ppc: Extend FPU state for newer POWER CPUs, David Gibson, 2012/10/18
- [Qemu-devel] [PATCH 08/15] pseries: Move XICS initialization before cpu initialization, David Gibson, 2012/10/18
- [Qemu-devel] [PATCH 13/15] target-pcc: Convert ppcemb_tlb_t to use fixed 64-bit RPN, David Gibson, 2012/10/18
- [Qemu-devel] [PATCH 03/15] pseries: Implement qemu initiated shutdowns using EPOW events, David Gibson, 2012/10/18
- [Qemu-devel] [PATCH 14/15] pseries: Implement PAPR NVRAM, David Gibson, 2012/10/18
- [Qemu-devel] [PATCH 15/15] pseries: Update SLOF for NVRAM support, David Gibson, 2012/10/18