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ppc/xive: Move the TIMA operations to the controller model

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On the P9 Processor, the thread interrupt context registers of a CPU
can be accessed "directly" when by load/store from the CPU or
"indirectly" by the IC through an indirect TIMA page. This requires to
configure first the PC_TCTXT_INDIRx registers.

Today, we rely on the get_tctx() handler to deduce from the CPU PIR
the chip from which the TIMA access is being done. By handling the
TIMA memory ops under the interrupt controller model of each machine,
we can uniformize the TIMA direct and indirect ops under PowerNV. We
can also check that the CPUs have been enabled in the XIVE controller.

This prepares ground for the future versions of XIVE.

Reviewed-by: Greg Kurz <groug@kaod.org>
Signed-off-by: Cédric Le Goater <clg@kaod.org>
Message-Id: <20191125065820.927-15-clg@kaod.org>
Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
This commit is contained in:
Cédric Le Goater 2019-11-25 07:58:14 +01:00 committed by David Gibson
parent 5373c61d6a
commit d024a2c111
4 changed files with 65 additions and 33 deletions
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35
hw/intc/pnv_xive.c
View File

@ -1467,6 +1467,39 @@ static const MemoryRegionOps xive_tm_indirect_ops = {
},
};
static void pnv_xive_tm_write(void *opaque, hwaddr offset,
uint64_t value, unsigned size)
{
PowerPCCPU *cpu = POWERPC_CPU(current_cpu);
PnvXive *xive = pnv_xive_tm_get_xive(cpu);
XiveTCTX *tctx = XIVE_TCTX(pnv_cpu_state(cpu)->intc);
xive_tctx_tm_write(XIVE_PRESENTER(xive), tctx, offset, value, size);
}
static uint64_t pnv_xive_tm_read(void *opaque, hwaddr offset, unsigned size)
{
PowerPCCPU *cpu = POWERPC_CPU(current_cpu);
PnvXive *xive = pnv_xive_tm_get_xive(cpu);
XiveTCTX *tctx = XIVE_TCTX(pnv_cpu_state(cpu)->intc);
return xive_tctx_tm_read(XIVE_PRESENTER(xive), tctx, offset, size);
}
const MemoryRegionOps pnv_xive_tm_ops = {
.read = pnv_xive_tm_read,
.write = pnv_xive_tm_write,
.endianness = DEVICE_BIG_ENDIAN,
.valid = {
.min_access_size = 1,
.max_access_size = 8,
},
.impl = {
.min_access_size = 1,
.max_access_size = 8,
},
};
/*
* Interrupt controller XSCOM region.
*/
@ -1809,7 +1842,7 @@ static void pnv_xive_realize(DeviceState *dev, Error **errp)
"xive-pc", PNV9_XIVE_PC_SIZE);
/* Thread Interrupt Management Area (Direct) */
memory_region_init_io(&xive->tm_mmio, OBJECT(xive), &xive_tm_ops,
memory_region_init_io(&xive->tm_mmio, OBJECT(xive), &pnv_xive_tm_ops,
xive, "xive-tima", PNV9_XIVE_TM_SIZE);
qemu_register_reset(pnv_xive_reset, dev);

33
hw/intc/spapr_xive.c
View File

@ -205,6 +205,35 @@ void spapr_xive_mmio_set_enabled(SpaprXive *xive, bool enable)
memory_region_set_enabled(&xive->end_source.esb_mmio, false);
}
static void spapr_xive_tm_write(void *opaque, hwaddr offset,
uint64_t value, unsigned size)
{
XiveTCTX *tctx = spapr_cpu_state(POWERPC_CPU(current_cpu))->tctx;
xive_tctx_tm_write(XIVE_PRESENTER(opaque), tctx, offset, value, size);
}
static uint64_t spapr_xive_tm_read(void *opaque, hwaddr offset, unsigned size)
{
XiveTCTX *tctx = spapr_cpu_state(POWERPC_CPU(current_cpu))->tctx;
return xive_tctx_tm_read(XIVE_PRESENTER(opaque), tctx, offset, size);
}
const MemoryRegionOps spapr_xive_tm_ops = {
.read = spapr_xive_tm_read,
.write = spapr_xive_tm_write,
.endianness = DEVICE_BIG_ENDIAN,
.valid = {
.min_access_size = 1,
.max_access_size = 8,
},
.impl = {
.min_access_size = 1,
.max_access_size = 8,
},
};
static void spapr_xive_end_reset(XiveEND *end)
{
memset(end, 0, sizeof(*end));
@ -314,8 +343,8 @@ static void spapr_xive_realize(DeviceState *dev, Error **errp)
qemu_register_reset(spapr_xive_reset, dev);
/* TIMA initialization */
memory_region_init_io(&xive->tm_mmio, OBJECT(xive), &xive_tm_ops, xive,
"xive.tima", 4ull << TM_SHIFT);
memory_region_init_io(&xive->tm_mmio, OBJECT(xive), &spapr_xive_tm_ops,
xive, "xive.tima", 4ull << TM_SHIFT);
sysbus_init_mmio(SYS_BUS_DEVICE(xive), &xive->tm_mmio);
/*

29
hw/intc/xive.c
View File

@ -523,35 +523,6 @@ uint64_t xive_tctx_tm_read(XivePresenter *xptr, XiveTCTX *tctx, hwaddr offset,
return xive_tm_raw_read(tctx, offset, size);
}
static void xive_tm_write(void *opaque, hwaddr offset,
uint64_t value, unsigned size)
{
XiveTCTX *tctx = xive_router_get_tctx(XIVE_ROUTER(opaque), current_cpu);
xive_tctx_tm_write(XIVE_PRESENTER(opaque), tctx, offset, value, size);
}
static uint64_t xive_tm_read(void *opaque, hwaddr offset, unsigned size)
{
XiveTCTX *tctx = xive_router_get_tctx(XIVE_ROUTER(opaque), current_cpu);
return xive_tctx_tm_read(XIVE_PRESENTER(opaque), tctx, offset, size);
}
const MemoryRegionOps xive_tm_ops = {
.read = xive_tm_read,
.write = xive_tm_write,
.endianness = DEVICE_BIG_ENDIAN,
.valid = {
.min_access_size = 1,
.max_access_size = 8,
},
.impl = {
.min_access_size = 1,
.max_access_size = 8,
},
};
static char *xive_tctx_ring_print(uint8_t *ring)
{
uint32_t w2 = xive_tctx_word2(ring);

1
include/hw/ppc/xive.h
View File

@ -462,7 +462,6 @@ typedef struct XiveENDSource {
#define XIVE_TM_OS_PAGE 0x2
#define XIVE_TM_USER_PAGE 0x3
extern const MemoryRegionOps xive_tm_ops;
void xive_tctx_tm_write(XivePresenter *xptr, XiveTCTX *tctx, hwaddr offset,
uint64_t value, unsigned size);
uint64_t xive_tctx_tm_read(XivePresenter *xptr, XiveTCTX *tctx, hwaddr offset,