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ppc/pnv: Dump the XIVE NVT table 

This is useful to dump the saved contexts of the vCPUs : configuration
of the base END index of the vCPU and the Interrupt Pending Buffer
register, which is updated when an interrupt can not be presented.

When dumping the NVT table, we skip empty indirect pages which are not
necessarily allocated.

Signed-off-by: Cédric Le Goater <clg@kaod.org>
Message-Id: <20191125065820.927-21-clg@kaod.org>
Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
This commit is contained in:
Cédric Le Goater 2019-11-25 07:58:20 +01:00 committed by David Gibson
parent f22f56dd48
commit d302e00080
2 changed files with 67 additions and 0 deletions
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64
hw/intc/pnv_xive.c
View File

@ -527,6 +527,44 @@ static uint32_t pnv_xive_nr_ipis(PnvXive *xive, uint8_t blk)
return VSD_INDIRECT & vsd ? 0 : vst_tsize * SBE_PER_BYTE;
}
/*
* Compute the number of entries per indirect subpage.
*/
static uint64_t pnv_xive_vst_per_subpage(PnvXive *xive, uint32_t type)
{
uint8_t blk = pnv_xive_block_id(xive);
uint64_t vsd = xive->vsds[type][blk];
const XiveVstInfo *info = &vst_infos[type];
uint64_t vsd_addr;
uint32_t page_shift;
/* For direct tables, fake a valid value */
if (!(VSD_INDIRECT & vsd)) {
return 1;
}
/* Get the page size of the indirect table. */
vsd_addr = vsd & VSD_ADDRESS_MASK;
vsd = ldq_be_dma(&address_space_memory, vsd_addr);
if (!(vsd & VSD_ADDRESS_MASK)) {
#ifdef XIVE_DEBUG
xive_error(xive, "VST: invalid %s entry %x !?", info->name, idx);
#endif
return 0;
}
page_shift = GETFIELD(VSD_TSIZE, vsd) + 12;
if (!pnv_xive_vst_page_size_allowed(page_shift)) {
xive_error(xive, "VST: invalid %s page shift %d", info->name,
page_shift);
return 0;
}
return (1ull << page_shift) / info->size;
}
/*
* EDT Table
*
@ -1665,6 +1703,21 @@ static const MemoryRegionOps pnv_xive_pc_ops = {
},
};
static void xive_nvt_pic_print_info(XiveNVT *nvt, uint32_t nvt_idx,
Monitor *mon)
{
uint8_t eq_blk = xive_get_field32(NVT_W1_EQ_BLOCK, nvt->w1);
uint32_t eq_idx = xive_get_field32(NVT_W1_EQ_INDEX, nvt->w1);
if (!xive_nvt_is_valid(nvt)) {
return;
}
monitor_printf(mon, " %08x end:%02x/%04x IPB:%02x\n", nvt_idx,
eq_blk, eq_idx,
xive_get_field32(NVT_W4_IPB, nvt->w4));
}
void pnv_xive_pic_print_info(PnvXive *xive, Monitor *mon)
{
XiveRouter *xrtr = XIVE_ROUTER(xive);
@ -1674,7 +1727,9 @@ void pnv_xive_pic_print_info(PnvXive *xive, Monitor *mon)
uint32_t nr_ipis = pnv_xive_nr_ipis(xive, blk);
XiveEAS eas;
XiveEND end;
XiveNVT nvt;
int i;
uint64_t xive_nvt_per_subpage;
monitor_printf(mon, "XIVE[%x] #%d Source %08x .. %08x\n", chip_id, blk,
srcno0, srcno0 + nr_ipis - 1);
@ -1702,6 +1757,15 @@ void pnv_xive_pic_print_info(PnvXive *xive, Monitor *mon)
while (!xive_router_get_end(xrtr, blk, i, &end)) {
xive_end_eas_pic_print_info(&end, i++, mon);
}
monitor_printf(mon, "XIVE[%x] #%d NVTT %08x .. %08x\n", chip_id, blk,
0, XIVE_NVT_COUNT - 1);
xive_nvt_per_subpage = pnv_xive_vst_per_subpage(xive, VST_TSEL_VPDT);
for (i = 0; i < XIVE_NVT_COUNT; i += xive_nvt_per_subpage) {
while (!xive_router_get_nvt(xrtr, blk, i, &nvt)) {
xive_nvt_pic_print_info(&nvt, i++, mon);
}
}
}
static void pnv_xive_reset(void *dev)

3
include/hw/ppc/xive_regs.h
View File

@ -252,6 +252,8 @@ typedef struct XiveNVT {
uint32_t w0;
#define NVT_W0_VALID PPC_BIT32(0)
uint32_t w1;
#define NVT_W1_EQ_BLOCK PPC_BITMASK32(0, 3)
#define NVT_W1_EQ_INDEX PPC_BITMASK32(4, 31)
uint32_t w2;
uint32_t w3;
uint32_t w4;
@ -277,6 +279,7 @@ typedef struct XiveNVT {
* field of the XIVE END
*/
#define XIVE_NVT_SHIFT 19
#define XIVE_NVT_COUNT (1 << XIVE_NVT_SHIFT)
static inline uint32_t xive_nvt_cam_line(uint8_t nvt_blk, uint32_t nvt_idx)
{