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Re: [Xen-devel] [PATCH v3 5/6] xen/arm: zynqmp: implement zynqmp_eemi


On 10/10/2018 11:49 PM, Stefano Stabellini wrote:
On Tue, 28 Aug 2018, Julien Grall wrote:
Hi Stefano,

On 11/08/18 01:01, Stefano Stabellini wrote:
From: "Edgar E. Iglesias" <edgar.iglesias@xxxxxxxxxx>

From: Edgar E. Iglesias <edgar.iglesias@xxxxxxxxxx>

zynqmp_eemi uses the defined functions and structs to decide whether to
make a call to the firmware, or to simply return a predefined value.

Signed-off-by: Edgar E. Iglesias <edgar.iglesias@xxxxxxxxxx>
Signed-off-by: Stefano Stabellini <stefanos@xxxxxxxxxx>
   xen/arch/arm/platforms/xilinx-zynqmp-eemi.c | 143
   1 file changed, 142 insertions(+), 1 deletion(-)

diff --git a/xen/arch/arm/platforms/xilinx-zynqmp-eemi.c
index 62cc15c..1dbdf04 100644
--- a/xen/arch/arm/platforms/xilinx-zynqmp-eemi.c
+++ b/xen/arch/arm/platforms/xilinx-zynqmp-eemi.c
@@ -808,7 +808,148 @@ static bool domain_has_mmio_access(struct domain *d,
     bool zynqmp_eemi(struct cpu_user_regs *regs)
-    return false;
+    struct arm_smccc_res res;
+    bool is_mmio_write = false;
+    uint32_t fid = get_user_reg(regs, 0);
+    uint32_t nodeid = get_user_reg(regs, 1);
+    unsigned int pm_fn = fid & 0xFFFF;

Here you will receive all the function ID for the SIP subsystem. Can you
confirm the EEMI can be accessed from both SMC32 and SMC64 convention?


Can you point me to the documentation? For instance, CALL_COUNT, UID and VERSION are only accessible via SMC32.


Julien Grall

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