* [RFC v1 1/6] xen/arm: traps: Reorder early overwrite of FID
2017-01-30 17:21 [RFC v1 0/6] zynqmp: Add forwarding of platform specific firmware calls Edgar E. Iglesias
@ 2017-01-30 17:21 ` Edgar E. Iglesias
2017-01-30 17:21 ` [RFC v1 2/6] xen/arm: Introduce platform_hvc Edgar E. Iglesias
` (4 subsequent siblings)
5 siblings, 0 replies; 8+ messages in thread
From: Edgar E. Iglesias @ 2017-01-30 17:21 UTC (permalink / raw)
To: xen-devel; +Cc: edgar.iglesias, julien.grall, sstabellini
From: "Edgar E. Iglesias" <edgar.iglesias@xilinx.com>
Move the early setting of PSCI_RESULT_REG to a later stage
avoiding the early override of the FID that's stored in
the same register.
No functional change.
Signed-off-by: Edgar E. Iglesias <edgar.iglesias@xilinx.com>
---
xen/arch/arm/traps.c | 7 +++++--
1 file changed, 5 insertions(+), 2 deletions(-)
diff --git a/xen/arch/arm/traps.c b/xen/arch/arm/traps.c
index 35d8e8b..a5fbf1e 100644
--- a/xen/arch/arm/traps.c
+++ b/xen/arch/arm/traps.c
@@ -1334,8 +1334,6 @@ static void do_trap_psci(struct cpu_user_regs *regs)
{
register_t fid = PSCI_ARG(regs,0);
- /* preloading in case psci_mode_check fails */
- PSCI_RESULT_REG(regs) = PSCI_INVALID_PARAMETERS;
switch( fid )
{
case PSCI_cpu_off:
@@ -1368,6 +1366,7 @@ static void do_trap_psci(struct cpu_user_regs *regs)
case PSCI_0_2_FN_MIGRATE_INFO_UP_CPU:
case PSCI_0_2_FN64_MIGRATE_INFO_UP_CPU:
perfc_incr(vpsci_migrate_info_up_cpu);
+ PSCI_RESULT_REG(regs) = PSCI_INVALID_PARAMETERS;
if ( psci_mode_check(current->domain, fid) )
PSCI_RESULT_REG(regs) = do_psci_0_2_migrate_info_up_cpu();
break;
@@ -1384,6 +1383,7 @@ static void do_trap_psci(struct cpu_user_regs *regs)
case PSCI_0_2_FN_CPU_ON:
case PSCI_0_2_FN64_CPU_ON:
perfc_incr(vpsci_cpu_on);
+ PSCI_RESULT_REG(regs) = PSCI_INVALID_PARAMETERS;
if ( psci_mode_check(current->domain, fid) )
{
register_t vcpuid = PSCI_ARG(regs,1);
@@ -1396,6 +1396,7 @@ static void do_trap_psci(struct cpu_user_regs *regs)
case PSCI_0_2_FN_CPU_SUSPEND:
case PSCI_0_2_FN64_CPU_SUSPEND:
perfc_incr(vpsci_cpu_suspend);
+ PSCI_RESULT_REG(regs) = PSCI_INVALID_PARAMETERS;
if ( psci_mode_check(current->domain, fid) )
{
uint32_t pstate = PSCI_ARG32(regs,1);
@@ -1408,6 +1409,7 @@ static void do_trap_psci(struct cpu_user_regs *regs)
case PSCI_0_2_FN_AFFINITY_INFO:
case PSCI_0_2_FN64_AFFINITY_INFO:
perfc_incr(vpsci_cpu_affinity_info);
+ PSCI_RESULT_REG(regs) = PSCI_INVALID_PARAMETERS;
if ( psci_mode_check(current->domain, fid) )
{
register_t taff = PSCI_ARG(regs,1);
@@ -1419,6 +1421,7 @@ static void do_trap_psci(struct cpu_user_regs *regs)
case PSCI_0_2_FN_MIGRATE:
case PSCI_0_2_FN64_MIGRATE:
perfc_incr(vpsci_cpu_migrate);
+ PSCI_RESULT_REG(regs) = PSCI_INVALID_PARAMETERS;
if ( psci_mode_check(current->domain, fid) )
{
uint32_t tcpu = PSCI_ARG32(regs,1);
--
2.7.4
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^ permalink raw reply related [flat|nested] 8+ messages in thread
* [RFC v1 2/6] xen/arm: Introduce platform_hvc
2017-01-30 17:21 [RFC v1 0/6] zynqmp: Add forwarding of platform specific firmware calls Edgar E. Iglesias
2017-01-30 17:21 ` [RFC v1 1/6] xen/arm: traps: Reorder early overwrite of FID Edgar E. Iglesias
@ 2017-01-30 17:21 ` Edgar E. Iglesias
2017-01-30 17:21 ` [RFC v1 3/6] xen/arm: Allow platform_hvc to handle guest SMC calls Edgar E. Iglesias
` (3 subsequent siblings)
5 siblings, 0 replies; 8+ messages in thread
From: Edgar E. Iglesias @ 2017-01-30 17:21 UTC (permalink / raw)
To: xen-devel; +Cc: edgar.iglesias, julien.grall, sstabellini
From: "Edgar E. Iglesias" <edgar.iglesias@xilinx.com>
Introduce platform_hvc as a way to handle hypercalls that
Xen does not know about in a platform specific way. This
is particularly useful for implementing the SiP (SoC
implementation specific) service calls.
Signed-off-by: Edgar E. Iglesias <edgar.iglesias@xilinx.com>
---
xen/arch/arm/platform.c | 8 ++++++++
xen/arch/arm/traps.c | 3 +++
xen/include/asm-arm/platform.h | 5 +++++
3 files changed, 16 insertions(+)
diff --git a/xen/arch/arm/platform.c b/xen/arch/arm/platform.c
index 0af6d57..90ea6b8 100644
--- a/xen/arch/arm/platform.c
+++ b/xen/arch/arm/platform.c
@@ -127,6 +127,14 @@ void platform_poweroff(void)
platform->poweroff();
}
+bool platform_hvc(struct cpu_user_regs *regs)
+{
+ if ( platform && platform->hvc )
+ return platform->hvc(regs);
+
+ return false;
+}
+
bool_t platform_has_quirk(uint32_t quirk)
{
uint32_t quirks = 0;
diff --git a/xen/arch/arm/traps.c b/xen/arch/arm/traps.c
index a5fbf1e..e8cd111 100644
--- a/xen/arch/arm/traps.c
+++ b/xen/arch/arm/traps.c
@@ -43,6 +43,7 @@
#include <asm/cpufeature.h>
#include <asm/flushtlb.h>
#include <asm/monitor.h>
+#include <asm/platform.h>
#include "decode.h"
#include "vtimer.h"
@@ -1429,6 +1430,8 @@ static void do_trap_psci(struct cpu_user_regs *regs)
}
break;
default:
+ if ( platform_hvc(regs) )
+ return;
domain_crash_synchronous();
return;
}
diff --git a/xen/include/asm-arm/platform.h b/xen/include/asm-arm/platform.h
index 08010ba..4d51f0a 100644
--- a/xen/include/asm-arm/platform.h
+++ b/xen/include/asm-arm/platform.h
@@ -26,6 +26,10 @@ struct platform_desc {
void (*reset)(void);
/* Platform power-off */
void (*poweroff)(void);
+ /* Platform specific HVC handler.
+ * Returns true if the call was handled and false if not.
+ */
+ bool (*hvc)(struct cpu_user_regs *regs);
/*
* Platform quirks
* Defined has a function because a platform can support multiple
@@ -55,6 +59,7 @@ int platform_cpu_up(int cpu);
#endif
void platform_reset(void);
void platform_poweroff(void);
+bool platform_hvc(struct cpu_user_regs *regs);
bool_t platform_has_quirk(uint32_t quirk);
bool_t platform_device_is_blacklisted(const struct dt_device_node *node);
--
2.7.4
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^ permalink raw reply related [flat|nested] 8+ messages in thread
* [RFC v1 3/6] xen/arm: Allow platform_hvc to handle guest SMC calls
2017-01-30 17:21 [RFC v1 0/6] zynqmp: Add forwarding of platform specific firmware calls Edgar E. Iglesias
2017-01-30 17:21 ` [RFC v1 1/6] xen/arm: traps: Reorder early overwrite of FID Edgar E. Iglesias
2017-01-30 17:21 ` [RFC v1 2/6] xen/arm: Introduce platform_hvc Edgar E. Iglesias
@ 2017-01-30 17:21 ` Edgar E. Iglesias
2017-01-30 17:21 ` [RFC v1 4/6] xen/arm: Introduce call_smcc64 Edgar E. Iglesias
` (2 subsequent siblings)
5 siblings, 0 replies; 8+ messages in thread
From: Edgar E. Iglesias @ 2017-01-30 17:21 UTC (permalink / raw)
To: xen-devel; +Cc: edgar.iglesias, julien.grall, sstabellini
From: "Edgar E. Iglesias" <edgar.iglesias@xilinx.com>
Allow platform_hvc to handle guest SMC calls (as well as
HVC calls) in a platform specific way.
Signed-off-by: Edgar E. Iglesias <edgar.iglesias@xilinx.com>
---
xen/arch/arm/traps.c | 3 +++
1 file changed, 3 insertions(+)
diff --git a/xen/arch/arm/traps.c b/xen/arch/arm/traps.c
index e8cd111..1925122 100644
--- a/xen/arch/arm/traps.c
+++ b/xen/arch/arm/traps.c
@@ -2622,6 +2622,9 @@ static void do_trap_smc(struct cpu_user_regs *regs, const union hsr hsr)
if ( current->domain->arch.monitor.privileged_call_enabled )
rc = monitor_smc();
+ if ( platform_hvc(regs) )
+ rc = 1;
+
if ( rc != 1 )
inject_undef_exception(regs, hsr);
}
--
2.7.4
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^ permalink raw reply related [flat|nested] 8+ messages in thread
* [RFC v1 4/6] xen/arm: Introduce call_smcc64
2017-01-30 17:21 [RFC v1 0/6] zynqmp: Add forwarding of platform specific firmware calls Edgar E. Iglesias
` (2 preceding siblings ...)
2017-01-30 17:21 ` [RFC v1 3/6] xen/arm: Allow platform_hvc to handle guest SMC calls Edgar E. Iglesias
@ 2017-01-30 17:21 ` Edgar E. Iglesias
2017-01-30 17:21 ` [RFC v1 5/6] xen/arm: zynqmp: Forward plaform specific firmware calls Edgar E. Iglesias
2017-01-30 17:21 ` [RFC v1 6/6] xen/arm: zynqmp: Remove blacklist of ZynqMP's PM node Edgar E. Iglesias
5 siblings, 0 replies; 8+ messages in thread
From: Edgar E. Iglesias @ 2017-01-30 17:21 UTC (permalink / raw)
To: xen-devel; +Cc: edgar.iglesias, julien.grall, sstabellini
From: "Edgar E. Iglesias" <edgar.iglesias@xilinx.com>
Introduce call_smcc64, a helper function to issue 64-bit SMC
calls that follow the SMC Calling Convention. This includes
returning up to 4 64-bit values.
Signed-off-by: Edgar E. Iglesias <edgar.iglesias@xilinx.com>
---
xen/include/asm-arm/processor.h | 40 ++++++++++++++++++++++++++++++++++++++++
1 file changed, 40 insertions(+)
diff --git a/xen/include/asm-arm/processor.h b/xen/include/asm-arm/processor.h
index afc0e9a..a604f8c 100644
--- a/xen/include/asm-arm/processor.h
+++ b/xen/include/asm-arm/processor.h
@@ -706,6 +706,46 @@ void vcpu_regs_user_to_hyp(struct vcpu *vcpu,
int call_smc(register_t function_id, register_t arg0, register_t arg1,
register_t arg2);
+/*
+ * Helper to issue a 64-bit SMC according to the SMC Calling Convention.
+ *
+ * @fid: Function Identifier
+ * @a0 - a5: 6 arguments
+ * @ret: Pointer to 4 register_t carrying return values
+ */
+static inline register_t call_smcc64(register_t fid,
+ register_t a0,
+ register_t a1,
+ register_t a2,
+ register_t a3,
+ register_t a4,
+ register_t a5,
+ register_t *ret)
+{
+ register register_t x0 asm("x0") = fid;
+ register register_t x1 asm("x1") = a0;
+ register register_t x2 asm("x2") = a1;
+ register register_t x3 asm("x3") = a2;
+ register register_t x4 asm("x4") = a3;
+ register register_t x5 asm("x5") = a4;
+ register register_t x6 asm("x6") = a5;
+
+ asm volatile ("smc #0\n"
+ : "+r" (x0), "+r" (x1), "+r" (x2), "+r" (x3),
+ "+r" (x4), "+r" (x5), "+r" (x6)
+ :
+ : "x7", "x8", "x9", "x10", "x11", "x12",
+ "x13", "x14", "x15", "x16", "x17" );
+
+ if (ret) {
+ ret[0] = x0;
+ ret[1] = x1;
+ ret[2] = x2;
+ ret[3] = x3;
+ }
+ return x0;
+}
+
void do_trap_guest_error(struct cpu_user_regs *regs);
#endif /* __ASSEMBLY__ */
--
2.7.4
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^ permalink raw reply related [flat|nested] 8+ messages in thread
* [RFC v1 5/6] xen/arm: zynqmp: Forward plaform specific firmware calls
2017-01-30 17:21 [RFC v1 0/6] zynqmp: Add forwarding of platform specific firmware calls Edgar E. Iglesias
` (3 preceding siblings ...)
2017-01-30 17:21 ` [RFC v1 4/6] xen/arm: Introduce call_smcc64 Edgar E. Iglesias
@ 2017-01-30 17:21 ` Edgar E. Iglesias
2017-01-31 9:52 ` Edgar E. Iglesias
2017-01-30 17:21 ` [RFC v1 6/6] xen/arm: zynqmp: Remove blacklist of ZynqMP's PM node Edgar E. Iglesias
5 siblings, 1 reply; 8+ messages in thread
From: Edgar E. Iglesias @ 2017-01-30 17:21 UTC (permalink / raw)
To: xen-devel; +Cc: edgar.iglesias, julien.grall, sstabellini
From: "Edgar E. Iglesias" <edgar.iglesias@xilinx.com>
Forward platform specific firmware calls from the hardware
domain to firmware.
Signed-off-by: Edgar E. Iglesias <edgar.iglesias@xilinx.com>
---
xen/arch/arm/platforms/xilinx-zynqmp.c | 63 ++++++++++++++++++++++++++++++++++
1 file changed, 63 insertions(+)
diff --git a/xen/arch/arm/platforms/xilinx-zynqmp.c b/xen/arch/arm/platforms/xilinx-zynqmp.c
index 2adee91..bde7f52 100644
--- a/xen/arch/arm/platforms/xilinx-zynqmp.c
+++ b/xen/arch/arm/platforms/xilinx-zynqmp.c
@@ -19,6 +19,46 @@
#include <asm/platform.h>
+/* Service calls. */
+#define SVC_MASK 0x3F000000
+#define SVC_SIP 0x02000000 /* SoC Implementation Specific. */
+
+/* SMC function IDs for SiP Service queries */
+#define ZYNQMP_SIP_SVC_CALL_COUNT 0xff00
+#define ZYNQMP_SIP_SVC_UID 0xff01
+#define ZYNQMP_SIP_SVC_VERSION 0xff03
+
+enum pm_api_id {
+ /* Miscellaneous API functions: */
+ GET_API_VERSION = 1,
+ SET_CONFIGURATION,
+ GET_NODE_STATUS,
+ GET_OPERATING_CHARACTERISTIC,
+ REGISTER_NOTIFIER,
+ /* API for suspending of PUs: */
+ REQUEST_SUSPEND,
+ SELF_SUSPEND,
+ FORCE_POWERDOWN,
+ ABORT_SUSPEND,
+ REQUEST_WAKEUP,
+ SET_WAKEUP_SOURCE,
+ SYSTEM_SHUTDOWN,
+ /* API for managing PM slaves: */
+ REQUEST_NODE,
+ RELEASE_NODE,
+ SET_REQUIREMENT,
+ SET_MAX_LATENCY,
+ /* Direct control API functions: */
+ RESET_ASSERT,
+ RESET_GET_STATUS,
+ MMIO_WRITE,
+ MMIO_READ,
+ PM_INIT,
+ FPGA_LOAD,
+ FPGA_GET_STATUS,
+ GET_CHIPID,
+};
+
static const char * const zynqmp_dt_compat[] __initconst =
{
"xlnx,zynqmp",
@@ -32,8 +72,31 @@ static const struct dt_device_match zynqmp_blacklist_dev[] __initconst =
{ /* sentinel */ },
};
+bool zynqmp_hvc(struct cpu_user_regs *regs)
+{
+ uint32_t fid = regs->x0;
+ uint32_t svc = fid & SVC_MASK;
+ register_t ret[4];
+
+ /* We only forward SiP service calls from the hw domain to firmware. */
+ if ( svc != SVC_SIP || !is_hardware_domain(current->domain) )
+ return false;
+
+ /* Forward the call. */
+ call_smcc64(regs->x0, regs->x1, regs->x2, regs->x3,
+ regs->x4, regs->x5, regs->x6, ret);
+
+ /* Transfer return values into guest registers. */
+ regs->x0 = ret[0];
+ regs->x1 = ret[1];
+ regs->x2 = ret[2];
+ regs->x3 = ret[3];
+ return true;
+}
+
PLATFORM_START(xgene_storm, "Xilinx ZynqMP")
.compatible = zynqmp_dt_compat,
+ .hvc = zynqmp_hvc,
.blacklist_dev = zynqmp_blacklist_dev,
PLATFORM_END
--
2.7.4
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* Re: [RFC v1 5/6] xen/arm: zynqmp: Forward plaform specific firmware calls
2017-01-30 17:21 ` [RFC v1 5/6] xen/arm: zynqmp: Forward plaform specific firmware calls Edgar E. Iglesias
@ 2017-01-31 9:52 ` Edgar E. Iglesias
0 siblings, 0 replies; 8+ messages in thread
From: Edgar E. Iglesias @ 2017-01-31 9:52 UTC (permalink / raw)
To: Edgar E. Iglesias; +Cc: julien.grall, sstabellini, xen-devel
On Mon, Jan 30, 2017 at 06:21:54PM +0100, Edgar E. Iglesias wrote:
> From: "Edgar E. Iglesias" <edgar.iglesias@xilinx.com>
>
> Forward platform specific firmware calls from the hardware
> domain to firmware.
>
> Signed-off-by: Edgar E. Iglesias <edgar.iglesias@xilinx.com>
> ---
> xen/arch/arm/platforms/xilinx-zynqmp.c | 63 ++++++++++++++++++++++++++++++++++
> 1 file changed, 63 insertions(+)
>
> diff --git a/xen/arch/arm/platforms/xilinx-zynqmp.c b/xen/arch/arm/platforms/xilinx-zynqmp.c
> index 2adee91..bde7f52 100644
> --- a/xen/arch/arm/platforms/xilinx-zynqmp.c
> +++ b/xen/arch/arm/platforms/xilinx-zynqmp.c
> @@ -19,6 +19,46 @@
>
> #include <asm/platform.h>
>
> +/* Service calls. */
> +#define SVC_MASK 0x3F000000
> +#define SVC_SIP 0x02000000 /* SoC Implementation Specific. */
> +
> +/* SMC function IDs for SiP Service queries */
> +#define ZYNQMP_SIP_SVC_CALL_COUNT 0xff00
> +#define ZYNQMP_SIP_SVC_UID 0xff01
> +#define ZYNQMP_SIP_SVC_VERSION 0xff03
> +
> +enum pm_api_id {
> + /* Miscellaneous API functions: */
> + GET_API_VERSION = 1,
> + SET_CONFIGURATION,
These pm_api_id enums are a left over and not needed, I'll remove them from
future versions of this patch.
Cheers,
Edgar
> + GET_NODE_STATUS,
> + GET_OPERATING_CHARACTERISTIC,
> + REGISTER_NOTIFIER,
> + /* API for suspending of PUs: */
> + REQUEST_SUSPEND,
> + SELF_SUSPEND,
> + FORCE_POWERDOWN,
> + ABORT_SUSPEND,
> + REQUEST_WAKEUP,
> + SET_WAKEUP_SOURCE,
> + SYSTEM_SHUTDOWN,
> + /* API for managing PM slaves: */
> + REQUEST_NODE,
> + RELEASE_NODE,
> + SET_REQUIREMENT,
> + SET_MAX_LATENCY,
> + /* Direct control API functions: */
> + RESET_ASSERT,
> + RESET_GET_STATUS,
> + MMIO_WRITE,
> + MMIO_READ,
> + PM_INIT,
> + FPGA_LOAD,
> + FPGA_GET_STATUS,
> + GET_CHIPID,
> +};
> +
> static const char * const zynqmp_dt_compat[] __initconst =
> {
> "xlnx,zynqmp",
> @@ -32,8 +72,31 @@ static const struct dt_device_match zynqmp_blacklist_dev[] __initconst =
> { /* sentinel */ },
> };
>
> +bool zynqmp_hvc(struct cpu_user_regs *regs)
> +{
> + uint32_t fid = regs->x0;
> + uint32_t svc = fid & SVC_MASK;
> + register_t ret[4];
> +
> + /* We only forward SiP service calls from the hw domain to firmware. */
> + if ( svc != SVC_SIP || !is_hardware_domain(current->domain) )
> + return false;
> +
> + /* Forward the call. */
> + call_smcc64(regs->x0, regs->x1, regs->x2, regs->x3,
> + regs->x4, regs->x5, regs->x6, ret);
> +
> + /* Transfer return values into guest registers. */
> + regs->x0 = ret[0];
> + regs->x1 = ret[1];
> + regs->x2 = ret[2];
> + regs->x3 = ret[3];
> + return true;
> +}
> +
> PLATFORM_START(xgene_storm, "Xilinx ZynqMP")
> .compatible = zynqmp_dt_compat,
> + .hvc = zynqmp_hvc,
> .blacklist_dev = zynqmp_blacklist_dev,
> PLATFORM_END
>
> --
> 2.7.4
>
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^ permalink raw reply [flat|nested] 8+ messages in thread
* [RFC v1 6/6] xen/arm: zynqmp: Remove blacklist of ZynqMP's PM node
2017-01-30 17:21 [RFC v1 0/6] zynqmp: Add forwarding of platform specific firmware calls Edgar E. Iglesias
` (4 preceding siblings ...)
2017-01-30 17:21 ` [RFC v1 5/6] xen/arm: zynqmp: Forward plaform specific firmware calls Edgar E. Iglesias
@ 2017-01-30 17:21 ` Edgar E. Iglesias
5 siblings, 0 replies; 8+ messages in thread
From: Edgar E. Iglesias @ 2017-01-30 17:21 UTC (permalink / raw)
To: xen-devel; +Cc: edgar.iglesias, julien.grall, sstabellini
From: "Edgar E. Iglesias" <edgar.iglesias@xilinx.com>
Stop blacklisting ZynqMP's power management node.
This is now possible since we allow the hardware domain to
issue HVC/SMC calls to firmware.
Signed-off-by: Edgar E. Iglesias <edgar.iglesias@xilinx.com>
---
xen/arch/arm/platforms/xilinx-zynqmp.c | 8 --------
1 file changed, 8 deletions(-)
diff --git a/xen/arch/arm/platforms/xilinx-zynqmp.c b/xen/arch/arm/platforms/xilinx-zynqmp.c
index bde7f52..d21bd87 100644
--- a/xen/arch/arm/platforms/xilinx-zynqmp.c
+++ b/xen/arch/arm/platforms/xilinx-zynqmp.c
@@ -65,13 +65,6 @@ static const char * const zynqmp_dt_compat[] __initconst =
NULL
};
-static const struct dt_device_match zynqmp_blacklist_dev[] __initconst =
-{
- /* Power management is not yet supported. */
- DT_MATCH_COMPATIBLE("xlnx,zynqmp-pm"),
- { /* sentinel */ },
-};
-
bool zynqmp_hvc(struct cpu_user_regs *regs)
{
uint32_t fid = regs->x0;
@@ -97,7 +90,6 @@ bool zynqmp_hvc(struct cpu_user_regs *regs)
PLATFORM_START(xgene_storm, "Xilinx ZynqMP")
.compatible = zynqmp_dt_compat,
.hvc = zynqmp_hvc,
- .blacklist_dev = zynqmp_blacklist_dev,
PLATFORM_END
/*
--
2.7.4
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