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pnv/xive2: Add NVG and NVC to cache watch facility 

The cache watch facility uses the same register interface to handle
entries in the NVP, NVG and NVC tables. A bit-field in the 'watchX
specification' register tells the table type. So far, that bit-field
was not read and the code assumed a read/write to the NVP table.

This patch allows to read/write entries in the NVG and NVC table as
well.

Signed-off-by: Frederic Barrat <fbarrat@linux.ibm.com>
Signed-off-by: Michael Kowal <kowal@linux.vnet.ibm.com>
Reviewed-by: Cédric Le Goater <clg@kaod.org>
Signed-off-by: Nicholas Piggin <npiggin@gmail.com>
This commit is contained in:
Frederic Barrat 2024-07-24 16:21:23 -05:00 committed by Nicholas Piggin
parent 76125c0132
commit d6d5f5c034
1 changed files with 38 additions and 11 deletions
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49
hw/intc/pnv_xive2.c
View File

@ -465,10 +465,30 @@ static int pnv_xive2_write_nvp(Xive2Router *xrtr, uint8_t blk, uint32_t idx,
word_number);
}
static int pnv_xive2_nvp_update(PnvXive2 *xive, uint8_t watch_engine)
static int pnv_xive2_nxc_to_table_type(uint8_t nxc_type, uint32_t *table_type)
{
uint8_t blk;
uint32_t idx;
switch (nxc_type) {
case PC_NXC_WATCH_NXC_NVP:
*table_type = VST_NVP;
break;
case PC_NXC_WATCH_NXC_NVG:
*table_type = VST_NVG;
break;
case PC_NXC_WATCH_NXC_NVC:
*table_type = VST_NVC;
break;
default:
qemu_log_mask(LOG_GUEST_ERROR,
"XIVE: invalid table type for nxc operation\n");
return -1;
}
return 0;
}
static int pnv_xive2_nxc_update(PnvXive2 *xive, uint8_t watch_engine)
{
uint8_t blk, nxc_type;
uint32_t idx, table_type = -1;
int i, spec_reg, data_reg;
uint64_t nxc_watch[4];
@ -476,21 +496,24 @@ static int pnv_xive2_nvp_update(PnvXive2 *xive, uint8_t watch_engine)
spec_reg = (PC_NXC_WATCH0_SPEC + watch_engine * 0x40) >> 3;
data_reg = (PC_NXC_WATCH0_DATA0 + watch_engine * 0x40) >> 3;
nxc_type = GETFIELD(PC_NXC_WATCH_NXC_TYPE, xive->pc_regs[spec_reg]);
blk = GETFIELD(PC_NXC_WATCH_BLOCK_ID, xive->pc_regs[spec_reg]);
idx = GETFIELD(PC_NXC_WATCH_INDEX, xive->pc_regs[spec_reg]);
assert(!pnv_xive2_nxc_to_table_type(nxc_type, &table_type));
for (i = 0; i < ARRAY_SIZE(nxc_watch); i++) {
nxc_watch[i] = cpu_to_be64(xive->pc_regs[data_reg + i]);
}
return pnv_xive2_vst_write(xive, VST_NVP, blk, idx, nxc_watch,
return pnv_xive2_vst_write(xive, table_type, blk, idx, nxc_watch,
XIVE_VST_WORD_ALL);
}
static void pnv_xive2_nvp_cache_load(PnvXive2 *xive, uint8_t watch_engine)
static void pnv_xive2_nxc_cache_load(PnvXive2 *xive, uint8_t watch_engine)
{
uint8_t blk;
uint32_t idx;
uint8_t blk, nxc_type;
uint32_t idx, table_type = -1;
uint64_t nxc_watch[4] = { 0 };
int i, spec_reg, data_reg;
@ -498,11 +521,15 @@ static void pnv_xive2_nvp_cache_load(PnvXive2 *xive, uint8_t watch_engine)
spec_reg = (PC_NXC_WATCH0_SPEC + watch_engine * 0x40) >> 3;
data_reg = (PC_NXC_WATCH0_DATA0 + watch_engine * 0x40) >> 3;
nxc_type = GETFIELD(PC_NXC_WATCH_NXC_TYPE, xive->pc_regs[spec_reg]);
blk = GETFIELD(PC_NXC_WATCH_BLOCK_ID, xive->pc_regs[spec_reg]);
idx = GETFIELD(PC_NXC_WATCH_INDEX, xive->pc_regs[spec_reg]);
if (pnv_xive2_vst_read(xive, VST_NVP, blk, idx, nxc_watch)) {
xive2_error(xive, "VST: no NVP entry %x/%x !?", blk, idx);
assert(!pnv_xive2_nxc_to_table_type(nxc_type, &table_type));
if (pnv_xive2_vst_read(xive, table_type, blk, idx, nxc_watch)) {
xive2_error(xive, "VST: no NXC entry %x/%x in %s table!?",
blk, idx, vst_infos[table_type].name);
}
for (i = 0; i < ARRAY_SIZE(nxc_watch); i++) {
@ -1432,7 +1459,7 @@ static uint64_t pnv_xive2_ic_pc_read(void *opaque, hwaddr offset,
* SPEC register
*/
watch_engine = (offset - PC_NXC_WATCH0_DATA0) >> 6;
pnv_xive2_nvp_cache_load(xive, watch_engine);
pnv_xive2_nxc_cache_load(xive, watch_engine);
val = xive->pc_regs[reg];
break;
@ -1506,7 +1533,7 @@ static void pnv_xive2_ic_pc_write(void *opaque, hwaddr offset,
/* writing to DATA0 triggers the cache write */
watch_engine = (offset - PC_NXC_WATCH0_DATA0) >> 6;
xive->pc_regs[reg] = val;
pnv_xive2_nvp_update(xive, watch_engine);
pnv_xive2_nxc_update(xive, watch_engine);
break;
/* case PC_NXC_FLUSH_CTRL: */