[kvm-unit-tests PATCH v8 11/35] powerpc/sprs: Specify SPRs with data rather than code

Nicholas Piggin
2024-04-05T08:36:32Z

A significant rework that builds an array of 'struct spr', where each
element describes an SPR. This makes various metadata about the SPR
like name and access type easier to carry and use.

Hypervisor privileged registers are described despite not being used
at the moment for completeness, but also the code might one day be
reused for a hypervisor-privileged test.

Acked-by: Thomas Huth <thuth@redhat.com>
Signed-off-by: Nicholas Piggin <npiggin@gmail.com>
---
lib/powerpc/asm/reg.h | 2 +
powerpc/sprs.c | 647 +++++++++++++++++++++++++++++-------------
2 files changed, 457 insertions(+), 192 deletions(-)

diff --git a/lib/powerpc/asm/reg.h b/lib/powerpc/asm/reg.h
index 6810c1d82..1f991288e 100644
--- a/lib/powerpc/asm/reg.h
+++ b/lib/powerpc/asm/reg.h
@@ -5,6 +5,8 @@

#define UL(x) _AC(x, UL)

+#define SPR_SRR0 0x01a
+#define SPR_SRR1 0x01b
#define SPR_TB 0x10c
#define SPR_SPRG0 0x110
#define SPR_SPRG1 0x111
diff --git a/powerpc/sprs.c b/powerpc/sprs.c
index a19d80a1a..44edd0d7b 100644
--- a/powerpc/sprs.c
+++ b/powerpc/sprs.c
@@ -30,229 +30,458 @@
#include <asm/time.h>
#include <asm/barrier.h>

-uint64_t before[1024], after[1024];
-
-/* Common SPRs for all PowerPC CPUs */
-static void set_sprs_common(uint64_t val)
+/* "Indirect" mfspr/mtspr which accept a non-constant spr number */
+static uint64_t __mfspr(unsigned spr)
{
- mtspr(9, val); /* CTR */
- // mtspr(273, val); /* SPRG1 */ /* Used by our exception handler */
- mtspr(274, val); /* SPRG2 */
- mtspr(275, val); /* SPRG3 */
+ uint64_t tmp;
+ uint64_t ret;
+
+ asm volatile(
+" bcl 20, 31, 1f \n"
+"1: mflr %0 \n"
+" addi %0, %0, (2f-1b) \n"
+" add %0, %0, %2 \n"
+" mtctr %0 \n"
+" bctr \n"
+"2: \n"
+".LSPR=0 \n"
+".rept 1024 \n"
+" mfspr %1, .LSPR \n"
+" b 3f \n"
+" .LSPR=.LSPR+1 \n"
+".endr \n"
+"3: \n"
+ : "=&r"(tmp),
+ "=r"(ret)
+ : "r"(spr*8) /* 8 bytes per 'mfspr ; b' block */
+ : "lr", "ctr");
+
+ return ret;
}

-/* SPRs from PowerPC Operating Environment Architecture, Book III, Vers. 2.01 */
-static void set_sprs_book3s_201(uint64_t val)
+static void __mtspr(unsigned spr, uint64_t val)
{
- mtspr(18, val); /* DSISR */
- mtspr(19, val); /* DAR */
- mtspr(152, val); /* CTRL */
- mtspr(256, val); /* VRSAVE */
- mtspr(786, val); /* MMCRA */
- mtspr(795, val); /* MMCR0 */
- mtspr(798, val); /* MMCR1 */
+ uint64_t tmp;
+
+ asm volatile(
+" bcl 20, 31, 1f \n"
+"1: mflr %0 \n"
+" addi %0, %0, (2f-1b) \n"
+" add %0, %0, %2 \n"
+" mtctr %0 \n"
+" bctr \n"
+"2: \n"
+".LSPR=0 \n"
+".rept 1024 \n"
+" mtspr .LSPR, %1 \n"
+" b 3f \n"
+" .LSPR=.LSPR+1 \n"
+".endr \n"
+"3: \n"
+ : "=&r"(tmp)
+ : "r"(val),
+ "r"(spr*8) /* 8 bytes per 'mfspr ; b' block */
+ : "lr", "ctr", "xer");
}

+static uint64_t before[1024], after[1024];
+
+#define SPR_PR_READ 0x0001
+#define SPR_PR_WRITE 0x0002
+#define SPR_OS_READ 0x0010
+#define SPR_OS_WRITE 0x0020
+#define SPR_HV_READ 0x0100
+#define SPR_HV_WRITE 0x0200
+
+#define RW 0x333
+#define RO 0x111
+#define WO 0x222
+#define OS_RW 0x330
+#define OS_RO 0x110
+#define OS_WO 0x220
+#define HV_RW 0x300
+#define HV_RO 0x100
+#define HV_WO 0x200
+
+#define SPR_ASYNC 0x1000 /* May be updated asynchronously */
+#define SPR_INT 0x2000 /* May be updated by synchronous interrupt */
+#define SPR_HARNESS 0x4000 /* Test harness uses the register */
+
+struct spr {
+ const char *name;
+ uint8_t width;
+ uint16_t access;
+ uint16_t type;
+};
+
+/* SPRs common denominator back to PowerPC Operating Environment Architecture */
+static const struct spr sprs_common[1024] = {
+ [1] = { "XER", 64, RW, SPR_HARNESS, }, /* Used by compiler */
+ [8] = { "LR", 64, RW, SPR_HARNESS, }, /* Compiler, mfspr/mtspr */
+ [9] = { "CTR", 64, RW, SPR_HARNESS, }, /* Compiler, mfspr/mtspr */
+ [18] = { "DSISR", 32, OS_RW, SPR_INT, },
+ [19] = { "DAR", 64, OS_RW, SPR_INT, },
+ [26] = { "SRR0", 64, OS_RW, SPR_INT, },
+ [27] = { "SRR1", 64, OS_RW, SPR_INT, },
+[268] = { "TB", 64, RO , SPR_ASYNC, },
+[269] = { "TBU", 32, RO, SPR_ASYNC, },
+[272] = { "SPRG0", 64, OS_RW, SPR_HARNESS, }, /* Interrupt stacr */
+[273] = { "SPRG1", 64, OS_RW, SPR_HARNESS, }, /* Interrupt Scratch */
+[274] = { "SPRG2", 64, OS_RW, },
+[275] = { "SPRG3", 64, OS_RW, },
+[287] = { "PVR", 32, OS_RO, },
+};
+
+/* SPRs from PowerPC Operating Environment Architecture, Book III, Vers. 2.01 */
+static const struct spr sprs_201[1024] = {
+ [22] = { "DEC", 32, OS_RW, SPR_ASYNC, },
+ [25] = { "SDR1", 64, HV_RW | OS_RO, },
+ [29] = { "ACCR", 64, OS_RW, },
+[136] = { "CTRL", 32, RO, },
+[152] = { "CTRL", 32, OS_WO, },
+[259] = { "SPRG3", 64, RO, },
+/* ASR, EAR omitted */
+[284] = { "TBL", 32, HV_WO, },
+[285] = { "TBU", 32, HV_WO, },
+[310] = { "HDEC", 32, HV_RW, SPR_ASYNC, },
+[1013]= { "DABR", 64, HV_RW | OS_RO, },
+[1023]= { "PIR", 32, OS_RO, SPR_ASYNC, }, /* Can't be virtualised, appears to be async */
+};
+
+static const struct spr sprs_970_pmu[1024] = {
+/* POWER4+ PMU, should confirm with PPC970 */
+[770] = { "MMCRA", 64, RO, },
+[771] = { "PMC1", 32, RO, },
+[772] = { "PMC2", 32, RO, },
+[773] = { "PMC3", 32, RO, },
+[774] = { "PMC4", 32, RO, },
+[775] = { "PMC5", 32, RO, },
+[776] = { "PMC6", 32, RO, },
+[777] = { "PMC7", 32, RO, },
+[778] = { "PMC8", 32, RO, },
+[779] = { "MMCR0", 64, RO, },
+[780] = { "SIAR", 64, RO, },
+[781] = { "SDAR", 64, RO, },
+[782] = { "MMCR1", 64, RO, },
+[786] = { "MMCRA", 64, OS_RW, },
+[787] = { "PMC1", 32, OS_RW, },
+[788] = { "PMC2", 32, OS_RW, },
+[789] = { "PMC3", 32, OS_RW, },
+[790] = { "PMC4", 32, OS_RW, },
+[791] = { "PMC5", 32, OS_RW, },
+[792] = { "PMC6", 32, OS_RW, },
+[793] = { "PMC7", 32, OS_RW, },
+[794] = { "PMC8", 32, OS_RW, },
+[795] = { "MMCR0", 64, OS_RW, },
+[796] = { "SIAR", 64, OS_RW, },
+[797] = { "SDAR", 64, OS_RW, },
+[798] = { "MMCR1", 64, OS_RW, },
+};
+
+/* These are common SPRs from 2.07S onward (POWER CPUs that support KVM HV) */
+static const struct spr sprs_power_common[1024] = {
+ [3] = { "DSCR", 64, RW, },
+ [13] = { "AMR", 64, RW, },
+ [17] = { "DSCR", 64, OS_RW, },
+ [28] = { "CFAR", 64, OS_RW, SPR_ASYNC, }, /* Effectively async */
+ [29] = { "AMR", 64, OS_RW, },
+ [61] = { "IAMR", 64, OS_RW, },
+[136] = { "CTRL", 32, RO, },
+[152] = { "CTRL", 32, OS_WO, },
+[153] = { "FSCR", 64, OS_RW, },
+[157] = { "UAMOR", 64, OS_RW, },
+[159] = { "PSPB", 32, OS_RW, },
+[176] = { "DPDES", 64, HV_RW | OS_RO, },
+[180] = { "DAWR0", 64, HV_RW, },
+[186] = { "RPR", 64, HV_RW, },
+[187] = { "CIABR", 64, HV_RW, },
+[188] = { "DAWRX0", 32, HV_RW, },
+[190] = { "HFSCR", 64, HV_RW, },
+[256] = { "VRSAVE", 32, RW, },
+[259] = { "SPRG3", 64, RO, },
+[284] = { "TBL", 32, HV_WO, },
+[285] = { "TBU", 32, HV_WO, },
+[286] = { "TBU40", 64, HV_WO, },
+[304] = { "HSPRG0", 64, HV_RW, },
+[305] = { "HSPRG1", 64, HV_RW, },
+[306] = { "HDSISR", 32, HV_RW, SPR_INT, },
+[307] = { "HDAR", 64, HV_RW, SPR_INT, },
+[308] = { "SPURR", 64, HV_RW | OS_RO, SPR_ASYNC, },
+[309] = { "PURR", 64, HV_RW | OS_RO, SPR_ASYNC, },
+[313] = { "HRMOR", 64, HV_RW, },
+[314] = { "HSRR0", 64, HV_RW, SPR_INT, },
+[315] = { "HSRR1", 64, HV_RW, SPR_INT, },
+[318] = { "LPCR", 64, HV_RW, },
+[319] = { "LPIDR", 32, HV_RW, },
+[336] = { "HMER", 64, HV_RW, },
+[337] = { "HMEER", 64, HV_RW, },
+[338] = { "PCR", 64, HV_RW, },
+[349] = { "AMOR", 64, HV_RW, },
+[446] = { "TIR", 64, OS_RO, },
+[800] = { "BESCRS", 64, RW, },
+[801] = { "BESCRSU", 32, RW, },
+[802] = { "BESCRR", 64, RW, },
+[803] = { "BESCRRU", 32, RW, },
+[804] = { "EBBHR", 64, RW, },
+[805] = { "EBBRR", 64, RW, },
+[806] = { "BESCR", 64, RW, },
+[815] = { "TAR", 64, RW, },
+[848] = { "IC", 64, HV_RW | OS_RO, SPR_ASYNC, },
+[849] = { "VTB", 64, HV_RW | OS_RO, SPR_ASYNC, },
+[896] = { "PPR", 64, RW, },
+[898] = { "PPR32", 32, RW, },
+[1023]= { "PIR", 32, OS_RO, SPR_ASYNC, }, /* Can't be virtualised, appears to be async */
+};
+
+static const struct spr sprs_tm[1024] = {
+#if 0
+ /* XXX: leave these out until enabling TM facility (and more testing) */
+[128] = { "TFHAR", 64, RW, },
+[129] = { "TFIAR", 64, RW, },
+[130] = { "TEXASR", 64, RW, },
+[131] = { "TEXASRU", 32, RW, },
+#endif
+};
+
/* SPRs from PowerISA 2.07 Book III-S */
-static void set_sprs_book3s_207(uint64_t val)
-{
- mtspr(3, val); /* DSCR */
- mtspr(13, val); /* AMR */
- mtspr(17, val); /* DSCR */
- mtspr(18, val); /* DSISR */
- mtspr(19, val); /* DAR */
- mtspr(29, val); /* AMR */
- mtspr(61, val); /* IAMR */
- // mtspr(152, val); /* CTRL */ /* TODO: Needs a fix in KVM */
- mtspr(153, val); /* FSCR */
- mtspr(157, val); /* UAMOR */
- mtspr(159, val); /* PSPB */
- mtspr(256, val); /* VRSAVE */
- // mtspr(272, val); /* SPRG0 */ /* Used by our exception handler */
- mtspr(769, val); /* MMCR2 */
- mtspr(770, val); /* MMCRA */
- mtspr(771, val); /* PMC1 */
- mtspr(772, val); /* PMC2 */
- mtspr(773, val); /* PMC3 */
- mtspr(774, val); /* PMC4 */
- mtspr(775, val); /* PMC5 */
- mtspr(776, val); /* PMC6 */
- mtspr(779, (val & 0xfffffffffbab3fffULL) | 0xfa0b2070); /* MMCR0 */
- mtspr(784, val); /* SIER */
- mtspr(785, val); /* MMCR2 */
- mtspr(786, val); /* MMCRA */
- mtspr(787, val); /* PMC1 */
- mtspr(788, val); /* PMC2 */
- mtspr(789, val); /* PMC3 */
- mtspr(790, val); /* PMC4 */
- mtspr(791, val); /* PMC5 */
- mtspr(792, val); /* PMC6 */
- mtspr(795, (val & 0xfffffffffbab3fffULL) | 0xfa0b2070); /* MMCR0 */
- mtspr(796, val); /* SIAR */
- mtspr(797, val); /* SDAR */
- mtspr(798, val); /* MMCR1 */
- mtspr(800, val); /* BESCRS */
- mtspr(801, val); /* BESCCRSU */
- mtspr(802, val); /* BESCRR */
- mtspr(803, val); /* BESCRRU */
- mtspr(804, val); /* EBBHR */
- mtspr(805, val); /* EBBRR */
- mtspr(806, val); /* BESCR */
- mtspr(815, val); /* TAR */
-}
+static const struct spr sprs_207[1024] = {
+ [22] = { "DEC", 32, OS_RW, SPR_ASYNC, },
+ [25] = { "SDR1", 64, HV_RW, },
+[177] = { "DHDES", 64, HV_RW, },
+[283] = { "CIR", 32, OS_RO, },
+[310] = { "HDEC", 32, HV_RW, SPR_ASYNC, },
+[312] = { "RMOR", 64, HV_RW, },
+[339] = { "HEIR", 32, HV_RW, SPR_INT, },
+};

/* SPRs from PowerISA 3.00 Book III */
-static void set_sprs_book3s_300(uint64_t val)
-{
- set_sprs_book3s_207(val);
- mtspr(48, val); /* PIDR */
- mtspr(144, val); /* TIDR */
- mtspr(823, val); /* PSSCR */
-}
+static const struct spr sprs_300[1024] = {
+ [22] = { "DEC", 64, OS_RW, SPR_ASYNC, },
+ [48] = { "PIDR", 32, OS_RW, },
+[144] = { "TIDR", 64, OS_RW, },
+[283] = { "CIR", 32, OS_RO, },
+[310] = { "HDEC", 64, HV_RW, SPR_ASYNC, },
+[339] = { "HEIR", 32, HV_RW, SPR_INT, },
+[464] = { "PTCR", 64, HV_RW, },
+[816] = { "ASDR", 64, HV_RW, SPR_INT, },
+[823] = { "PSSCR", 64, OS_RW, },
+[855] = { "PSSCR", 64, HV_RW, },
+};

-/* SPRs from Power ISA Version 3.1B */
-static void set_sprs_book3s_31(uint64_t val)
-{
- set_sprs_book3s_207(val);
- mtspr(48, val); /* PIDR */
- /* 3.1 removes TIDR */
- mtspr(823, val); /* PSSCR */
-}
+/* SPRs from PowerISA 3.1B Book III */
+static const struct spr sprs_31[1024] = {
+ [22] = { "DEC", 64, OS_RW, SPR_ASYNC, },
+ [48] = { "PIDR", 32, OS_RW, },
+[181] = { "DAWR1", 64, HV_RW, },
+[189] = { "DAWRX1", 32, HV_RW, },
+[310] = { "HDEC", 64, HV_RW, SPR_ASYNC, },
+[339] = { "HEIR", 64, HV_RW, SPR_INT, },
+[455] = { "HDEXCR", 32, RO, },
+[464] = { "PTCR", 64, HV_RW, },
+[468] = { "HASHKEYR", 64, OS_RW, },
+[469] = { "HASHPKEYR", 64, HV_RW, },
+[471] = { "HDEXCR", 64, HV_RW, },
+[812] = { "DEXCR", 32, RO, },
+[816] = { "ASDR", 64, HV_RW, SPR_INT, },
+[823] = { "PSSCR", 64, OS_RW, },
+[828] = { "DEXCR", 64, OS_RW, },
+[855] = { "PSSCR", 64, HV_RW, },
+};

-static void set_sprs(uint64_t val)
+/* SPRs POWER9, POWER10 User Manual */
+static const struct spr sprs_power9_10[1024] = {
+[276] = { "SPRC", 64, HV_RW, },
+[277] = { "SPRD", 64, HV_RW, },
+[317] = { "TFMR", 64, HV_RW, },
+[799] = { "IMC", 64, HV_RW, },
+[850] = { "LDBAR", 64, HV_RO, },
+[851] = { "MMCRC", 32, HV_RW, },
+[853] = { "PMSR", 32, HV_RO, },
+[861] = { "L2QOSR", 64, HV_WO, },
+[881] = { "TRIG1", 64, OS_WO, },
+[882] = { "TRIG2", 64, OS_WO, },
+[884] = { "PMCR", 64, HV_RW, },
+[885] = { "RWMR", 64, HV_RW, },
+[895] = { "WORT", 64, OS_RW, }, /* UM says 18-bits! */
+[921] = { "TSCR", 32, HV_RW, },
+[922] = { "TTR", 64, HV_RW, },
+[1006]= { "TRACE", 64, WO, },
+[1008]= { "HID", 64, HV_RW, },
+};
+
+/* This covers POWER8 and POWER9 PMUs */
+static const struct spr sprs_power_common_pmu[1024] = {
+[768] = { "SIER", 64, RO, },
+[769] = { "MMCR2", 64, RW, },
+[770] = { "MMCRA", 64, RW, },
+[771] = { "PMC1", 32, RW, },
+[772] = { "PMC2", 32, RW, },
+[773] = { "PMC3", 32, RW, },
+[774] = { "PMC4", 32, RW, },
+[775] = { "PMC5", 32, RW, },
+[776] = { "PMC6", 32, RW, },
+[779] = { "MMCR0", 64, RW, },
+[780] = { "SIAR", 64, RO, },
+[781] = { "SDAR", 64, RO, },
+[782] = { "MMCR1", 64, RO, },
+[784] = { "SIER", 64, OS_RW, },
+[785] = { "MMCR2", 64, OS_RW, },
+[786] = { "MMCRA", 64, OS_RW, },
+[787] = { "PMC1", 32, OS_RW, },
+[788] = { "PMC2", 32, OS_RW, },
+[789] = { "PMC3", 32, OS_RW, },
+[790] = { "PMC4", 32, OS_RW, },
+[791] = { "PMC5", 32, OS_RW, },
+[792] = { "PMC6", 32, OS_RW, },
+[795] = { "MMCR0", 64, OS_RW, },
+[796] = { "SIAR", 64, OS_RW, },
+[797] = { "SDAR", 64, OS_RW, },
+[798] = { "MMCR1", 64, OS_RW, },
+};
+
+static const struct spr sprs_power10_pmu[1024] = {
+[736] = { "SIER2", 64, RO, },
+[737] = { "SIER3", 64, RO, },
+[738] = { "MMCR3", 64, RO, },
+[752] = { "SIER2", 64, OS_RW, },
+[753] = { "SIER3", 64, OS_RW, },
+[754] = { "MMCR3", 64, OS_RW, },
+};
+
+static struct spr sprs[1024];
+
+static void setup_sprs(void)
{
- set_sprs_common(val);
+ int i;
+
+ for (i = 0; i < 1024; i++) {
+ if (sprs_common[i].name) {
+ memcpy(&sprs[i], &sprs_common[i], sizeof(struct spr));
+ }
+ }

switch (mfspr(SPR_PVR) & PVR_VERSION_MASK) {
case PVR_VER_970:
case PVR_VER_970FX:
case PVR_VER_970MP:
- set_sprs_book3s_201(val);
+ for (i = 0; i < 1024; i++) {
+ if (sprs_201[i].name) {
+ assert(!sprs[i].name);
+ memcpy(&sprs[i], &sprs_201[i], sizeof(struct spr));
+ }
+ if (sprs_970_pmu[i].name) {
+ assert(!sprs[i].name);
+ memcpy(&sprs[i], &sprs_power_common_pmu[i], sizeof(struct spr));
+ }
+ }
break;
+
case PVR_VER_POWER8E:
case PVR_VER_POWER8NVL:
case PVR_VER_POWER8:
- set_sprs_book3s_207(val);
+ for (i = 0; i < 1024; i++) {
+ if (sprs_power_common[i].name) {
+ assert(!sprs[i].name);
+ memcpy(&sprs[i], &sprs_power_common[i], sizeof(struct spr));
+ }
+ if (sprs_207[i].name) {
+ assert(!sprs[i].name);
+ memcpy(&sprs[i], &sprs_207[i], sizeof(struct spr));
+ }
+ if (sprs_tm[i].name) {
+ assert(!sprs[i].name);
+ memcpy(&sprs[i], &sprs_tm[i], sizeof(struct spr));
+ }
+ if (sprs_power_common_pmu[i].name) {
+ assert(!sprs[i].name);
+ memcpy(&sprs[i], &sprs_power_common_pmu[i], sizeof(struct spr));
+ }
+ }
break;
+
case PVR_VER_POWER9:
- set_sprs_book3s_300(val);
+ for (i = 0; i < 1024; i++) {
+ if (sprs_power_common[i].name) {
+ assert(!sprs[i].name);
+ memcpy(&sprs[i], &sprs_power_common[i], sizeof(struct spr));
+ }
+ if (sprs_300[i].name) {
+ assert(!sprs[i].name);
+ memcpy(&sprs[i], &sprs_300[i], sizeof(struct spr));
+ }
+ if (sprs_tm[i].name) {
+ assert(!sprs[i].name);
+ memcpy(&sprs[i], &sprs_tm[i], sizeof(struct spr));
+ }
+ if (sprs_power9_10[i].name) {
+ assert(!sprs[i].name);
+ memcpy(&sprs[i], &sprs_power9_10[i], sizeof(struct spr));
+ }
+ if (sprs_power_common_pmu[i].name) {
+ assert(!sprs[i].name);
+ memcpy(&sprs[i], &sprs_power_common_pmu[i], sizeof(struct spr));
+ }
+ }
break;
+
case PVR_VER_POWER10:
- set_sprs_book3s_31(val);
+ for (i = 0; i < 1024; i++) {
+ if (sprs_power_common[i].name) {
+ assert(!sprs[i].name);
+ memcpy(&sprs[i], &sprs_power_common[i], sizeof(struct spr));
+ }
+ if (sprs_31[i].name) {
+ assert(!sprs[i].name);
+ memcpy(&sprs[i], &sprs_31[i], sizeof(struct spr));
+ }
+ if (sprs_power9_10[i].name) {
+ assert(!sprs[i].name);
+ memcpy(&sprs[i], &sprs_power9_10[i], sizeof(struct spr));
+ }
+ if (sprs_power_common_pmu[i].name) {
+ assert(!sprs[i].name);
+ memcpy(&sprs[i], &sprs_power_common_pmu[i], sizeof(struct spr));
+ }
+ if (sprs_power10_pmu[i].name) {
+ assert(!sprs[i].name);
+ memcpy(&sprs[i], &sprs_power10_pmu[i], sizeof(struct spr));
+ }
+ }
break;
+
default:
- puts("Warning: Unknown processor version!\n");
+ memcpy(sprs, sprs_common, sizeof(sprs));
+ puts("Warning: Unknown processor version, falling back to common SPRs!\n");
+ break;
}
}

-static void get_sprs_common(uint64_t *v)
-{
- v[9] = mfspr(9); /* CTR */
- // v[273] = mfspr(273); /* SPRG1 */ /* Used by our exception handler */
- v[274] = mfspr(274); /* SPRG2 */
- v[275] = mfspr(275); /* SPRG3 */
-}
-
-static void get_sprs_book3s_201(uint64_t *v)
-{
- v[18] = mfspr(18); /* DSISR */
- v[19] = mfspr(19); /* DAR */
- v[136] = mfspr(136); /* CTRL */
- v[256] = mfspr(256); /* VRSAVE */
- v[786] = mfspr(786); /* MMCRA */
- v[795] = mfspr(795); /* MMCR0 */
- v[798] = mfspr(798); /* MMCR1 */
-}
-
-static void get_sprs_book3s_207(uint64_t *v)
-{
- v[3] = mfspr(3); /* DSCR */
- v[13] = mfspr(13); /* AMR */
- v[17] = mfspr(17); /* DSCR */
- v[18] = mfspr(18); /* DSISR */
- v[19] = mfspr(19); /* DAR */
- v[29] = mfspr(29); /* AMR */
- v[61] = mfspr(61); /* IAMR */
- // v[136] = mfspr(136); /* CTRL */ /* TODO: Needs a fix in KVM */
- v[153] = mfspr(153); /* FSCR */
- v[157] = mfspr(157); /* UAMOR */
- v[159] = mfspr(159); /* PSPB */
- v[256] = mfspr(256); /* VRSAVE */
- v[259] = mfspr(259); /* SPRG3 (read only) */
- // v[272] = mfspr(272); /* SPRG0 */ /* Used by our exception handler */
- v[769] = mfspr(769); /* MMCR2 */
- v[770] = mfspr(770); /* MMCRA */
- v[771] = mfspr(771); /* PMC1 */
- v[772] = mfspr(772); /* PMC2 */
- v[773] = mfspr(773); /* PMC3 */
- v[774] = mfspr(774); /* PMC4 */
- v[775] = mfspr(775); /* PMC5 */
- v[776] = mfspr(776); /* PMC6 */
- v[779] = mfspr(779); /* MMCR0 */
- v[780] = mfspr(780); /* SIAR (read only) */
- v[781] = mfspr(781); /* SDAR (read only) */
- v[782] = mfspr(782); /* MMCR1 (read only) */
- v[784] = mfspr(784); /* SIER */
- v[785] = mfspr(785); /* MMCR2 */
- v[786] = mfspr(786); /* MMCRA */
- v[787] = mfspr(787); /* PMC1 */
- v[788] = mfspr(788); /* PMC2 */
- v[789] = mfspr(789); /* PMC3 */
- v[790] = mfspr(790); /* PMC4 */
- v[791] = mfspr(791); /* PMC5 */
- v[792] = mfspr(792); /* PMC6 */
- v[795] = mfspr(795); /* MMCR0 */
- v[796] = mfspr(796); /* SIAR */
- v[797] = mfspr(797); /* SDAR */
- v[798] = mfspr(798); /* MMCR1 */
- v[800] = mfspr(800); /* BESCRS */
- v[801] = mfspr(801); /* BESCCRSU */
- v[802] = mfspr(802); /* BESCRR */
- v[803] = mfspr(803); /* BESCRRU */
- v[804] = mfspr(804); /* EBBHR */
- v[805] = mfspr(805); /* EBBRR */
- v[806] = mfspr(806); /* BESCR */
- v[815] = mfspr(815); /* TAR */
-}
-
-static void get_sprs_book3s_300(uint64_t *v)
+static void get_sprs(uint64_t *v)
{
- get_sprs_book3s_207(v);
- v[48] = mfspr(48); /* PIDR */
- v[144] = mfspr(144); /* TIDR */
- v[823] = mfspr(823); /* PSSCR */
-}
+ int i;

-static void get_sprs_book3s_31(uint64_t *v)
-{
- get_sprs_book3s_207(v);
- v[48] = mfspr(48); /* PIDR */
- v[823] = mfspr(823); /* PSSCR */
+ for (i = 0; i < 1024; i++) {
+ if (!(sprs[i].access & SPR_OS_READ))
+ continue;
+ v[i] = __mfspr(i);
+ }
}

-static void get_sprs(uint64_t *v)
+static void set_sprs(uint64_t val)
{
- uint32_t pvr = mfspr(287); /* Processor Version Register */
-
- get_sprs_common(v);
+ int i;

- switch (pvr >> 16) {
- case 0x39: /* PPC970 */
- case 0x3C: /* PPC970FX */
- case 0x44: /* PPC970MP */
- get_sprs_book3s_201(v);
- break;
- case 0x4b: /* POWER8E */
- case 0x4c: /* POWER8NVL */
- case 0x4d: /* POWER8 */
- get_sprs_book3s_207(v);
- break;
- case 0x4e: /* POWER9 */
- get_sprs_book3s_300(v);
- break;
- case 0x80: /* POWER10 */
- get_sprs_book3s_31(v);
- break;
+ for (i = 0; i < 1024; i++) {
+ if (!(sprs[i].access & SPR_OS_WRITE))
+ continue;
+ if (sprs[i].type & SPR_HARNESS)
+ continue;
+ if (!strcmp(sprs[i].name, "MMCR0")) {
+ /* XXX: could use a comment or better abstraction! */
+ __mtspr(i, (val & 0xfffffffffbab3fffULL) | 0xfa0b2070);
+ } else {
+ __mtspr(i, val);
+ }
}
}

@@ -289,7 +518,9 @@ int main(int argc, char **argv)
}
}

- printf("Settings SPRs to %#lx...\n", pat);
+ setup_sprs();
+
+ printf("Setting SPRs to 0x%lx...\n", pat);
set_sprs(pat);

memset(before, 0, sizeof(before));
@@ -299,18 +530,50 @@ int main(int argc, char **argv)

if (pause) {
migrate_once();
+ /* Reload regs changed by getchar/putchar hcalls */
+ before[SPR_SRR0] = mfspr(SPR_SRR0);
+ before[SPR_SRR1] = mfspr(SPR_SRR1);
+
+ /* WORT seems to go to 0 after KVM switch, perhaps CPU idle */
+ if (sprs[895].name)
+ before[895] = mfspr(895);
} else {
msleep(2000);
+
+ /* Reload regs changed by dec interrupt */
+ before[SPR_SRR0] = mfspr(SPR_SRR0);
+ before[SPR_SRR1] = mfspr(SPR_SRR1);
+ before[SPR_SPRG1] = mfspr(SPR_SPRG1);
+
+ /* WORT seems to go to 0 after KVM switch, perhaps CPU idle */
+ if (sprs[895].name)
+ before[895] = mfspr(895);
}

get_sprs(after);

puts("Checking SPRs...\n");
for (i = 0; i < 1024; i++) {
- if (before[i] != 0 || after[i] != 0)
- report(before[i] == after[i],
- "SPR %d:\t%#018lx <==> %#018lx", i, before[i],
- after[i]);
+ bool pass = true;
+
+ if (!(sprs[i].access & SPR_OS_READ))
+ continue;
+
+ if (sprs[i].width == 32) {
+ if (before[i] >> 32)
+ pass = false;
+ }
+ if (!(sprs[i].type & (SPR_HARNESS|SPR_ASYNC)) && (before[i] != after[i]))
+ pass = false;
+
+ if (sprs[i].width == 32 && !(before[i] >> 32) && !(after[i] >> 32))
+ report(pass, "%-10s(%4d):\t 0x%08lx <==> 0x%08lx",
+ sprs[i].name, i,
+ before[i], after[i]);
+ else
+ report(pass, "%-10s(%4d):\t0x%016lx <==> 0x%016lx",
+ sprs[i].name, i,
+ before[i], after[i]);
}

return report_summary();
--
2.43.0