From: Andrew Jones <drjones@redhat.com>
To: kvm@vger.kernel.org
Cc: alexandru.elisei@arm.com, nikos.nikoleris@arm.com,
andre.przywara@arm.com, eric.auger@redhat.com
Subject: [PATCH kvm-unit-tests 8/8] arm/arm64: psci: don't assume method is hvc
Date: Wed, 7 Apr 2021 20:59:18 +0200 [thread overview]
Message-ID: <20210407185918.371983-9-drjones@redhat.com> (raw)
In-Reply-To: <20210407185918.371983-1-drjones@redhat.com>
The method can also be smc and it will be when running on bare metal.
Signed-off-by: Andrew Jones <drjones@redhat.com>
---
arm/selftest.c | 34 +++++++---------------------------
lib/arm/asm/psci.h | 9 +++++++--
lib/arm/psci.c | 17 +++++++++++++++--
lib/arm/setup.c | 22 ++++++++++++++++++++++
4 files changed, 51 insertions(+), 31 deletions(-)
diff --git a/arm/selftest.c b/arm/selftest.c
index 4495b161cdd5..9f459ed3d571 100644
--- a/arm/selftest.c
+++ b/arm/selftest.c
@@ -400,33 +400,13 @@ static void check_vectors(void *arg __unused)
exit(report_summary());
}
-static bool psci_check(void)
+static void psci_print(void)
{
- const struct fdt_property *method;
- int node, len, ver;
-
- node = fdt_node_offset_by_compatible(dt_fdt(), -1, "arm,psci-0.2");
- if (node < 0) {
- printf("PSCI v0.2 compatibility required\n");
- return false;
- }
-
- method = fdt_get_property(dt_fdt(), node, "method", &len);
- if (method == NULL) {
- printf("bad psci device tree node\n");
- return false;
- }
-
- if (len < 4 || strcmp(method->data, "hvc") != 0) {
- printf("psci method must be hvc\n");
- return false;
- }
-
- ver = psci_invoke(PSCI_0_2_FN_PSCI_VERSION, 0, 0, 0);
- printf("PSCI version %d.%d\n", PSCI_VERSION_MAJOR(ver),
- PSCI_VERSION_MINOR(ver));
-
- return true;
+ int ver = psci_invoke(PSCI_0_2_FN_PSCI_VERSION, 0, 0, 0);
+ report_info("PSCI version: %d.%d", PSCI_VERSION_MAJOR(ver),
+ PSCI_VERSION_MINOR(ver));
+ report_info("PSCI method: %s", psci_invoke == psci_invoke_hvc ?
+ "hvc" : "smc");
}
static void cpu_report(void *data __unused)
@@ -465,7 +445,7 @@ int main(int argc, char **argv)
} else if (strcmp(argv[1], "smp") == 0) {
- report(psci_check(), "PSCI version");
+ psci_print();
on_cpus(cpu_report, NULL);
while (!cpumask_full(&ready))
cpu_relax();
diff --git a/lib/arm/asm/psci.h b/lib/arm/asm/psci.h
index 7b956bf5987d..e385ce27f5d1 100644
--- a/lib/arm/asm/psci.h
+++ b/lib/arm/asm/psci.h
@@ -3,8 +3,13 @@
#include <libcflat.h>
#include <linux/psci.h>
-extern int psci_invoke(unsigned long function_id, unsigned long arg0,
- unsigned long arg1, unsigned long arg2);
+typedef int (*psci_invoke_fn)(unsigned long function_id, unsigned long arg0,
+ unsigned long arg1, unsigned long arg2);
+extern psci_invoke_fn psci_invoke;
+extern int psci_invoke_hvc(unsigned long function_id, unsigned long arg0,
+ unsigned long arg1, unsigned long arg2);
+extern int psci_invoke_smc(unsigned long function_id, unsigned long arg0,
+ unsigned long arg1, unsigned long arg2);
extern int psci_cpu_on(unsigned long cpuid, unsigned long entry_point);
extern void psci_system_reset(void);
extern int cpu_psci_cpu_boot(unsigned int cpu);
diff --git a/lib/arm/psci.c b/lib/arm/psci.c
index 936c83948b6a..46300f30822c 100644
--- a/lib/arm/psci.c
+++ b/lib/arm/psci.c
@@ -11,9 +11,11 @@
#include <asm/page.h>
#include <asm/smp.h>
+psci_invoke_fn psci_invoke;
+
__attribute__((noinline))
-int psci_invoke(unsigned long function_id, unsigned long arg0,
- unsigned long arg1, unsigned long arg2)
+int psci_invoke_hvc(unsigned long function_id, unsigned long arg0,
+ unsigned long arg1, unsigned long arg2)
{
asm volatile(
"hvc #0"
@@ -22,6 +24,17 @@ int psci_invoke(unsigned long function_id, unsigned long arg0,
return function_id;
}
+__attribute__((noinline))
+int psci_invoke_smc(unsigned long function_id, unsigned long arg0,
+ unsigned long arg1, unsigned long arg2)
+{
+ asm volatile(
+ "smc #0"
+ : "+r" (function_id)
+ : "r" (arg0), "r" (arg1), "r" (arg2));
+ return function_id;
+}
+
int psci_cpu_on(unsigned long cpuid, unsigned long entry_point)
{
#ifdef __arm__
diff --git a/lib/arm/setup.c b/lib/arm/setup.c
index 5cda2d919d2b..e595a9e5a167 100644
--- a/lib/arm/setup.c
+++ b/lib/arm/setup.c
@@ -25,6 +25,7 @@
#include <asm/processor.h>
#include <asm/smp.h>
#include <asm/timer.h>
+#include <asm/psci.h>
#include "io.h"
@@ -55,6 +56,26 @@ int mpidr_to_cpu(uint64_t mpidr)
return -1;
}
+static void psci_set_conduit(void)
+{
+ const void *fdt = dt_fdt();
+ const struct fdt_property *method;
+ int node, len;
+
+ node = fdt_node_offset_by_compatible(fdt, -1, "arm,psci-0.2");
+ assert_msg(node >= 0, "PSCI v0.2 compatibility required");
+
+ method = fdt_get_property(fdt, node, "method", &len);
+ assert(method != NULL && len == 4);
+
+ if (strcmp(method->data, "hvc") == 0)
+ psci_invoke = psci_invoke_hvc;
+ else if (strcmp(method->data, "smc") == 0)
+ psci_invoke = psci_invoke_smc;
+ else
+ assert_msg(false, "Unknown PSCI conduit: %s", method->data);
+}
+
static void cpu_set(int fdtnode __unused, u64 regval, void *info __unused)
{
int cpu = nr_cpus++;
@@ -259,6 +280,7 @@ void setup(const void *fdt, phys_addr_t freemem_start)
mem_regions_add_assumed();
mem_init(PAGE_ALIGN((unsigned long)freemem));
+ psci_set_conduit();
cpu_init();
/* cpu_init must be called before thread_info_init */
--
2.26.3
next prev parent reply other threads:[~2021-04-07 18:59 UTC|newest]
Thread overview: 38+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-04-07 18:59 [PATCH kvm-unit-tests 0/8] arm/arm64: Prepare for target-efi Andrew Jones
2021-04-07 18:59 ` [PATCH kvm-unit-tests 1/8] arm/arm64: Reorganize cstart assembler Andrew Jones
2021-04-09 17:18 ` Nikos Nikoleris
2021-04-09 17:28 ` Andrew Jones
2021-04-13 16:34 ` Alexandru Elisei
2021-04-14 8:59 ` Andrew Jones
2021-04-14 15:15 ` Alexandru Elisei
2021-04-15 13:03 ` Andrew Jones
2021-04-07 18:59 ` [PATCH kvm-unit-tests 2/8] arm/arm64: Move setup_vm into setup Andrew Jones
2021-04-09 17:24 ` Nikos Nikoleris
2021-04-14 15:19 ` Alexandru Elisei
2021-04-07 18:59 ` [PATCH kvm-unit-tests 3/8] pci-testdev: ioremap regions Andrew Jones
2021-04-13 14:12 ` Nikos Nikoleris
2021-04-07 18:59 ` [PATCH kvm-unit-tests 4/8] arm/arm64: mmu: Stop mapping an assumed IO region Andrew Jones
2021-04-13 14:06 ` Nikos Nikoleris
2021-04-14 15:42 ` Alexandru Elisei
2021-04-15 13:09 ` Andrew Jones
2021-04-07 18:59 ` [PATCH kvm-unit-tests 5/8] arm/arm64: mmu: Remove memory layout assumptions Andrew Jones
2021-04-13 14:27 ` Nikos Nikoleris
2021-04-15 15:48 ` Alexandru Elisei
2021-04-15 17:11 ` Andrew Jones
2021-04-19 15:09 ` Alexandru Elisei
2021-04-07 18:59 ` [PATCH kvm-unit-tests 6/8] arm/arm64: setup: Consolidate " Andrew Jones
2021-04-13 16:41 ` Nikos Nikoleris
2021-04-14 9:03 ` Andrew Jones
2021-04-15 16:59 ` Alexandru Elisei
2021-04-15 17:25 ` Andrew Jones
2021-04-19 15:56 ` Alexandru Elisei
2021-04-19 15:59 ` Alexandru Elisei
2021-04-19 17:53 ` Andrew Jones
2021-04-07 18:59 ` [PATCH kvm-unit-tests 7/8] chr-testdev: Silently fail init Andrew Jones
2021-04-13 16:42 ` Nikos Nikoleris
2021-04-15 17:03 ` Alexandru Elisei
2021-04-07 18:59 ` Andrew Jones [this message]
2021-04-09 17:46 ` [PATCH kvm-unit-tests 8/8] arm/arm64: psci: don't assume method is hvc Nikos Nikoleris
2021-04-14 9:06 ` Andrew Jones
2021-04-19 16:33 ` Alexandru Elisei
2021-04-19 18:13 ` Andrew Jones
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