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[220.235.194.103]) by smtp.gmail.com with ESMTPSA id x24-20020aa784d8000000b006e463414493sm3626693pfn.105.2024.02.26.02.13.15 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 26 Feb 2024 02:13:19 -0800 (PST) From: Nicholas Piggin To: Thomas Huth Cc: Nicholas Piggin , Laurent Vivier , Andrew Jones , Paolo Bonzini , Joel Stanley , linuxppc-dev@lists.ozlabs.org, kvm@vger.kernel.org, =?utf-8?q?C=C3=A9dric_Le_Goater?= Subject: [kvm-unit-tests PATCH 11/32] powerpc: Support powernv machine with QEMU TCG Date: Mon, 26 Feb 2024 20:11:57 +1000 Message-ID: <20240226101218.1472843-12-npiggin@gmail.com> X-Mailer: git-send-email 2.42.0 In-Reply-To: <20240226101218.1472843-1-npiggin@gmail.com> References: <20240226101218.1472843-1-npiggin@gmail.com> Precedence: bulk X-Mailing-List: kvm@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Add support for QEMU's powernv machine. This uses standard firmware (skiboot) rather than a minimal firmware shim. Reviewed-by: Cédric Le Goater Signed-off-by: Nicholas Piggin --- lib/powerpc/asm/processor.h | 23 +++++++++++ lib/powerpc/asm/reg.h | 4 ++ lib/powerpc/hcall.c | 4 +- lib/powerpc/io.c | 27 ++++++++++++- lib/powerpc/io.h | 6 +++ lib/powerpc/processor.c | 37 ++++++++++++++++++ lib/powerpc/setup.c | 14 +++++-- lib/ppc64/asm/opal.h | 15 ++++++++ lib/ppc64/opal-calls.S | 50 ++++++++++++++++++++++++ lib/ppc64/opal.c | 76 +++++++++++++++++++++++++++++++++++++ powerpc/Makefile.ppc64 | 2 + powerpc/cstart64.S | 7 ++++ powerpc/run | 42 ++++++++++++++++---- powerpc/unittests.cfg | 10 ++++- 14 files changed, 301 insertions(+), 16 deletions(-) create mode 100644 lib/ppc64/asm/opal.h create mode 100644 lib/ppc64/opal-calls.S create mode 100644 lib/ppc64/opal.c diff --git a/lib/powerpc/asm/processor.h b/lib/powerpc/asm/processor.h index e415f9235..9d8061962 100644 --- a/lib/powerpc/asm/processor.h +++ b/lib/powerpc/asm/processor.h @@ -10,6 +10,8 @@ void handle_exception(int trap, void (*func)(struct pt_regs *, void *), void *); void do_handle_exception(struct pt_regs *regs); #endif /* __ASSEMBLY__ */ +extern bool cpu_has_hv; + static inline uint64_t mfspr(int nr) { uint64_t ret; @@ -38,4 +40,25 @@ static inline void mtmsr(uint64_t msr) asm volatile ("mtmsrd %[msr]" :: [msr] "r" (msr) : "memory"); } +/* + * This returns true on PowerNV / OPAL machines which run in hypervisor + * mode. False on pseries / PAPR machines that run in guest mode. + */ +static inline bool machine_is_powernv(void) +{ + return cpu_has_hv; +} + +/* + * This returns true on pseries / PAPR / KVM machines which run under a + * hypervisor or QEMU pseries machine. False for PowerNV / OPAL. + */ +static inline bool machine_is_pseries(void) +{ + return !machine_is_powernv(); +} + +void enable_mcheck(void); +void disable_mcheck(void); + #endif /* _ASMPOWERPC_PROCESSOR_H_ */ diff --git a/lib/powerpc/asm/reg.h b/lib/powerpc/asm/reg.h index c80b32059..782e75527 100644 --- a/lib/powerpc/asm/reg.h +++ b/lib/powerpc/asm/reg.h @@ -30,7 +30,11 @@ #define MMCR0_PMAO UL(0x00000080) /* Machine State Register definitions: */ +#define MSR_LE_BIT 0 #define MSR_EE_BIT 15 /* External Interrupts Enable */ +#define MSR_HV_BIT 60 /* Hypervisor mode */ #define MSR_SF_BIT 63 /* 64-bit mode */ +#define MSR_ME UL(0x1000) + #endif diff --git a/lib/powerpc/hcall.c b/lib/powerpc/hcall.c index b4d39ac65..45f201315 100644 --- a/lib/powerpc/hcall.c +++ b/lib/powerpc/hcall.c @@ -25,7 +25,7 @@ int hcall_have_broken_sc1(void) return r3 == (unsigned long)H_PRIVILEGE; } -void putchar(int c) +void papr_putchar(int c) { unsigned long vty = 0; /* 0 == default */ unsigned long nr_chars = 1; @@ -34,7 +34,7 @@ void putchar(int c) hcall(H_PUT_TERM_CHAR, vty, nr_chars, chars); } -int __getchar(void) +int __papr_getchar(void) { register unsigned long r3 asm("r3") = H_GET_TERM_CHAR; register unsigned long r4 asm("r4") = 0; /* 0 == default vty */ diff --git a/lib/powerpc/io.c b/lib/powerpc/io.c index a381688bc..ab7bb843c 100644 --- a/lib/powerpc/io.c +++ b/lib/powerpc/io.c @@ -9,13 +9,33 @@ #include #include #include +#include #include "io.h" static struct spinlock print_lock; +void putchar(int c) +{ + if (machine_is_powernv()) + opal_putchar(c); + else + papr_putchar(c); +} + +int __getchar(void) +{ + if (machine_is_powernv()) + return __opal_getchar(); + else + return __papr_getchar(); +} + void io_init(void) { - rtas_init(); + if (machine_is_powernv()) + assert(!opal_init()); + else + rtas_init(); } void puts(const char *s) @@ -38,7 +58,10 @@ void exit(int code) // FIXME: change this print-exit/rtas-poweroff to chr_testdev_exit(), // maybe by plugging chr-testdev into a spapr-vty. printf("\nEXIT: STATUS=%d\n", ((code) << 1) | 1); - rtas_power_off(); + if (machine_is_powernv()) + opal_power_off(); + else + rtas_power_off(); halt(code); __builtin_unreachable(); } diff --git a/lib/powerpc/io.h b/lib/powerpc/io.h index d4f21ba15..943bf142b 100644 --- a/lib/powerpc/io.h +++ b/lib/powerpc/io.h @@ -8,6 +8,12 @@ #define _POWERPC_IO_H_ extern void io_init(void); +extern int opal_init(void); +extern void opal_power_off(void); extern void putchar(int c); +extern void opal_putchar(int c); +extern void papr_putchar(int c); +extern int __opal_getchar(void); +extern int __papr_getchar(void); #endif diff --git a/lib/powerpc/processor.c b/lib/powerpc/processor.c index 114584024..1b4bb0d61 100644 --- a/lib/powerpc/processor.c +++ b/lib/powerpc/processor.c @@ -84,6 +84,16 @@ void sleep_tb(uint64_t cycles) { uint64_t start, end, now; + if (!machine_is_pseries()) { + /* + * P9/10 Could use 'stop' to sleep here which would be + * interesting. stop with ESL=0 should be simple enough, ESL=1 + * would require SRESET based wakeup which is more involved. + */ + delay(cycles); + return; + } + start = now = get_tb(); end = start + cycles; @@ -120,3 +130,30 @@ void usleep(uint64_t us) { sleep_tb((us * tb_hz) / 1000000); } + +static void rfid_msr(uint64_t msr) +{ + uint64_t tmp; + + asm volatile( + "mtsrr1 %1 \n\ + bl 0f \n\ + 0: \n\ + mflr %0 \n\ + addi %0,%0,1f-0b \n\ + mtsrr0 %0 \n\ + rfid \n\ + 1: \n" + : "=r"(tmp) : "r"(msr) : "lr"); +} + +void enable_mcheck(void) +{ + /* This is a no-op on pseries */ + rfid_msr(mfmsr() | MSR_ME); +} + +void disable_mcheck(void) +{ + rfid_msr(mfmsr() & ~MSR_ME); +} diff --git a/lib/powerpc/setup.c b/lib/powerpc/setup.c index d98f66fae..89e5157f2 100644 --- a/lib/powerpc/setup.c +++ b/lib/powerpc/setup.c @@ -19,6 +19,7 @@ #include #include #include +#include #include #include "io.h" @@ -85,6 +86,8 @@ static void cpu_set(int fdtnode, u64 regval, void *info) } } +bool cpu_has_hv; + static void cpu_init(void) { struct cpu_set_params params; @@ -98,12 +101,13 @@ static void cpu_init(void) tb_hz = params.tb_hz; /* Interrupt Endianness */ - + if (machine_is_pseries()) { #if __BYTE_ORDER__ == __ORDER_LITTLE_ENDIAN__ - hcall(H_SET_MODE, 1, 4, 0, 0); + hcall(H_SET_MODE, 1, 4, 0, 0); #else - hcall(H_SET_MODE, 0, 4, 0, 0); + hcall(H_SET_MODE, 0, 4, 0, 0); #endif + } } static void mem_init(phys_addr_t freemem_start) @@ -159,6 +163,10 @@ void setup(const void *fdt) u32 fdt_size; int ret; + cpu_has_hv = !!(mfmsr() & (1ULL << MSR_HV_BIT)); + + enable_mcheck(); + /* * Before calling mem_init we need to move the fdt and initrd * to safe locations. We move them to construct the memory diff --git a/lib/ppc64/asm/opal.h b/lib/ppc64/asm/opal.h new file mode 100644 index 000000000..de64e2c8d --- /dev/null +++ b/lib/ppc64/asm/opal.h @@ -0,0 +1,15 @@ +/* SPDX-License-Identifier: GPL-2.0-or-later */ +#ifndef _ASMPPC64_OPAL_H_ +#define _ASMPPC64_OPAL_H_ + +#define OPAL_SUCCESS 0 + +#define OPAL_CONSOLE_WRITE 1 +#define OPAL_CONSOLE_READ 2 +#define OPAL_CEC_POWER_DOWN 5 +#define OPAL_POLL_EVENTS 10 +#define OPAL_REINIT_CPUS 70 +# define OPAL_REINIT_CPUS_HILE_BE (1 << 0) +# define OPAL_REINIT_CPUS_HILE_LE (1 << 1) + +#endif diff --git a/lib/ppc64/opal-calls.S b/lib/ppc64/opal-calls.S new file mode 100644 index 000000000..8cb4c3e91 --- /dev/null +++ b/lib/ppc64/opal-calls.S @@ -0,0 +1,50 @@ +/* SPDX-License-Identifier: GPL-2.0-or-later */ +/* + * Copyright (c) 2016 IBM Corporation. + */ + +#include + + .text + .globl opal_call +opal_call: + mr r0,r3 + mr r3,r4 + mr r4,r5 + mr r5,r6 + mr r6,r7 + mflr r11 + std r11,16(r1) + mfcr r12 + stw r12,8(r1) + std r2,-8(r1) /* use redzone */ + + /* Set opal return address */ + LOAD_REG_ADDR(r11, opal_return) + mtlr r11 + mfmsr r12 + std r12,-16(r1) /* use redzone */ + + /* switch to BE when we enter OPAL */ + li r11,(1 << MSR_LE_BIT) + ori r11,r11,(1 << MSR_EE_BIT) + andc r12,r12,r11 + mtspr SPR_HSRR1,r12 + + /* load the opal call entry point and base */ + LOAD_REG_ADDR(r11, opal) + ld r12,8(r11) + ld r2,0(r11) + mtspr SPR_HSRR0,r12 + hrfid + +opal_return: + FIXUP_ENDIAN + ld r12,-16(r1) /* use redzone */ + mtmsrd r12 + ld r2,-8(r1) /* use redzone */ + lwz r11,8(r1); + ld r12,16(r1) + mtcr r11; + mtlr r12 + blr diff --git a/lib/ppc64/opal.c b/lib/ppc64/opal.c new file mode 100644 index 000000000..63fe42ae6 --- /dev/null +++ b/lib/ppc64/opal.c @@ -0,0 +1,76 @@ +/* SPDX-License-Identifier: GPL-2.0-or-later */ +/* + * OPAL call helpers + */ +#include +#include +#include +#include +#include +#include "../powerpc/io.h" + +struct opal { + uint64_t base; + uint64_t entry; +} opal; + +extern int64_t opal_call(int64_t token, int64_t arg1, int64_t arg2, int64_t arg3); + +int opal_init(void) +{ + const struct fdt_property *prop; + int node, len; + + node = fdt_path_offset(dt_fdt(), "/ibm,opal"); + if (node < 0) + return -1; + + prop = fdt_get_property(dt_fdt(), node, "opal-base-address", &len); + if (!prop) + return -1; + opal.base = fdt64_to_cpu(*(uint64_t *)prop->data); + + prop = fdt_get_property(dt_fdt(), node, "opal-entry-address", &len); + if (!prop) + return -1; + opal.entry = fdt64_to_cpu(*(uint64_t *)prop->data); + +#if __BYTE_ORDER__ == __ORDER_LITTLE_ENDIAN__ + if (opal_call(OPAL_REINIT_CPUS, OPAL_REINIT_CPUS_HILE_LE, 0, 0) != OPAL_SUCCESS) + return -1; +#endif + + return 0; +} + +extern void opal_power_off(void) +{ + opal_call(OPAL_CEC_POWER_DOWN, 0, 0, 0); + while (true) + opal_call(OPAL_POLL_EVENTS, 0, 0, 0); +} + +void opal_putchar(int c) +{ + unsigned long vty = 0; /* 0 == default */ + unsigned long nr_chars = cpu_to_be64(1); + char ch = c; + + opal_call(OPAL_CONSOLE_WRITE, (int64_t)vty, (int64_t)&nr_chars, (int64_t)&ch); +} + +int __opal_getchar(void) +{ + unsigned long vty = 0; /* 0 == default */ + unsigned long nr_chars = cpu_to_be64(1); + char ch; + int rc; + + rc = opal_call(OPAL_CONSOLE_READ, (int64_t)vty, (int64_t)&nr_chars, (int64_t)&ch); + if (rc != OPAL_SUCCESS) + return -1; + if (nr_chars == 0) + return -1; + + return ch; +} diff --git a/powerpc/Makefile.ppc64 b/powerpc/Makefile.ppc64 index eb682c226..a18a9628f 100644 --- a/powerpc/Makefile.ppc64 +++ b/powerpc/Makefile.ppc64 @@ -18,6 +18,8 @@ reloc.o = $(TEST_DIR)/reloc64.o OBJDIRS += lib/ppc64 cflatobjs += lib/ppc64/stack.o +cflatobjs += lib/ppc64/opal.o +cflatobjs += lib/ppc64/opal-calls.o # ppc64 specific tests tests = $(TEST_DIR)/spapr_vpa.elf diff --git a/powerpc/cstart64.S b/powerpc/cstart64.S index 278af84a6..5e091e325 100644 --- a/powerpc/cstart64.S +++ b/powerpc/cstart64.S @@ -100,6 +100,13 @@ start: sync isync + /* powernv machine does not check broken_sc1 */ + mfmsr r3 + li r4,1 + sldi r4,r4,MSR_HV_BIT + and. r3,r3,r4 + bne 1f + /* patch sc1 if needed */ bl hcall_have_broken_sc1 cmpwi r3, 0 diff --git a/powerpc/run b/powerpc/run index 5cdb94194..172f32a46 100755 --- a/powerpc/run +++ b/powerpc/run @@ -1,5 +1,14 @@ #!/usr/bin/env bash +get_qemu_machine () +{ + if [ "$MACHINE" ]; then + echo $MACHINE + else + echo pseries + fi +} + if [ -z "$KUT_STANDALONE" ]; then if [ ! -f config.mak ]; then echo "run ./configure && make first. See ./configure -h" @@ -11,24 +20,41 @@ fi set_qemu_accelerator || exit $? +MACHINE=$(get_qemu_machine) || + exit $? + +if [[ "$MACHINE" == "powernv"* ]] && [ "$ACCEL" = "kvm" ]; then + echo "PowerNV machine does not support KVM. ACCEL=tcg must be specified." + exit 2 +fi + qemu=$(search_qemu_binary) || exit $? -if ! $qemu -machine '?' 2>&1 | grep 'pseries' > /dev/null; then - echo "$qemu doesn't support pSeries ('-machine pseries'). Exiting." +if ! $qemu -machine '?' 2>&1 | grep $MACHINE > /dev/null; then + echo "$qemu doesn't support '-machine $MACHINE'. Exiting." exit 2 fi -M='-machine pseries' +M="-machine $MACHINE" M+=",accel=$ACCEL$ACCEL_PROPS" +B="" +D="" + +if [[ "$MACHINE" == "pseries"* ]] ; then + if [[ "$ACCEL" == "tcg" ]] ; then + M+=",cap-cfpc=broken,cap-sbbc=broken,cap-ibs=broken,cap-ccf-assist=off" + elif [[ "$ACCEL" == "kvm" ]] ; then + M+=",cap-ccf-assist=off" + fi + B+="-bios $FIRMWARE" +fi -if [[ "$ACCEL" == "tcg" ]] ; then - M+=",cap-cfpc=broken,cap-sbbc=broken,cap-ibs=broken,cap-ccf-assist=off" -elif [[ "$ACCEL" == "kvm" ]] ; then - M+=",cap-ccf-assist=off" +if [[ "$MACHINE" == "powernv"* ]] ; then + D+="-device ipmi-bmc-sim,id=bmc0 -device isa-ipmi-bt,bmc=bmc0,irq=10" fi -command="$qemu -nodefaults $M -bios $FIRMWARE" +command="$qemu -nodefaults $M $B $D" command+=" -display none -serial stdio -kernel" command="$(migration_cmd) $(timeout_cmd) $command" diff --git a/powerpc/unittests.cfg b/powerpc/unittests.cfg index fadd8dde6..41bb8a327 100644 --- a/powerpc/unittests.cfg +++ b/powerpc/unittests.cfg @@ -33,11 +33,12 @@ [selftest-setup] file = selftest.elf smp = 2 -extra_params = -m 256 -append 'setup smp=2 mem=256' +extra_params = -m 1g -append 'setup smp=2 mem=1024' groups = selftest [selftest-migration] file = selftest-migration.elf +machine = pseries groups = selftest migration [selftest-migration-skip] @@ -55,24 +56,29 @@ groups = migration [spapr_hcall] file = spapr_hcall.elf +machine = pseries [spapr_vpa] file = spapr_vpa.elf +machine = pseries [rtas-get-time-of-day] file = rtas.elf +machine = pseries timeout = 5 extra_params = -append "get-time-of-day date=$(date +%s)" groups = rtas [rtas-get-time-of-day-base] file = rtas.elf +machine = pseries timeout = 5 extra_params = -rtc base="2006-06-17" -append "get-time-of-day date=$(date --date="2006-06-17 UTC" +%s)" groups = rtas [rtas-set-time-of-day] file = rtas.elf +machine = pseries extra_params = -append "set-time-of-day" timeout = 5 groups = rtas @@ -82,6 +88,7 @@ file = emulator.elf [h_cede_tm] file = tm.elf +machine = pseries accel = kvm smp = 2,threads=2 extra_params = -machine cap-htm=on -append "h_cede_tm" @@ -92,5 +99,6 @@ file = sprs.elf [sprs-migration] file = sprs.elf +machine = pseries extra_params = -append '-w' groups = migration