Re: [Xen-devel] [RFC PATCH 16/31] arm: add SMC wrapper that is compatible with SMCCC

2017-12-05 Thread Stefano Stabellini
On Tue, 5 Dec 2017, Volodymyr Babchuk wrote: > Hi Stefano, > > On Mon, Dec 04, 2017 at 06:30:13PM -0800, Stefano Stabellini wrote: > > On Thu, 9 Nov 2017, Oleksandr Tyshchenko wrote: > > > From: Volodymyr Babchuk > > > > > > Existing SMC wrapper call_smc() allows only 4 parameters and > > > retu

Re: [Xen-devel] [RFC PATCH 16/31] arm: add SMC wrapper that is compatible with SMCCC

2017-12-05 Thread Oleksandr Tyshchenko
On Tue, Dec 5, 2017 at 7:08 PM, Volodymyr Babchuk wrote: > Hi Julien, Hi Julien, Volodymyr. > > On 05.12.17 16:58, Julien Grall wrote: >> >> Hi Oleksandr, >> >> On 09/11/17 17:10, Oleksandr Tyshchenko wrote: >>> >>> From: Volodymyr Babchuk >>> >>> Existing SMC wrapper call_smc() allows only 4 pa

Re: [Xen-devel] [RFC PATCH 16/31] arm: add SMC wrapper that is compatible with SMCCC

2017-12-05 Thread Julien Grall
On 05/12/17 17:08, Volodymyr Babchuk wrote: Hi Julien, On 05.12.17 16:58, Julien Grall wrote: Hi Oleksandr, On 09/11/17 17:10, Oleksandr Tyshchenko wrote: From: Volodymyr Babchuk Existing SMC wrapper call_smc() allows only 4 parameters and returns only one value. This is enough for existi

Re: [Xen-devel] [RFC PATCH 16/31] arm: add SMC wrapper that is compatible with SMCCC

2017-12-05 Thread Volodymyr Babchuk
Hi Julien, On 05.12.17 16:58, Julien Grall wrote: Hi Oleksandr, On 09/11/17 17:10, Oleksandr Tyshchenko wrote: From: Volodymyr Babchuk Existing SMC wrapper call_smc() allows only 4 parameters and returns only one value. This is enough for existing use in PSCI code, but TEE mediator will need

Re: [Xen-devel] [RFC PATCH 16/31] arm: add SMC wrapper that is compatible with SMCCC

2017-12-05 Thread Volodymyr Babchuk
Hi Stefano, On Mon, Dec 04, 2017 at 06:30:13PM -0800, Stefano Stabellini wrote: > On Thu, 9 Nov 2017, Oleksandr Tyshchenko wrote: > > From: Volodymyr Babchuk > > > > Existing SMC wrapper call_smc() allows only 4 parameters and > > returns only one value. This is enough for existing > > use in PS

Re: [Xen-devel] [RFC PATCH 16/31] arm: add SMC wrapper that is compatible with SMCCC

2017-12-05 Thread Julien Grall
Hi Oleksandr, On 09/11/17 17:10, Oleksandr Tyshchenko wrote: From: Volodymyr Babchuk Existing SMC wrapper call_smc() allows only 4 parameters and returns only one value. This is enough for existing use in PSCI code, but TEE mediator will need a call that is fully compatible with ARM SMCCC. Thi

Re: [Xen-devel] [RFC PATCH 16/31] arm: add SMC wrapper that is compatible with SMCCC

2017-12-04 Thread Stefano Stabellini
On Thu, 9 Nov 2017, Oleksandr Tyshchenko wrote: > From: Volodymyr Babchuk > > Existing SMC wrapper call_smc() allows only 4 parameters and > returns only one value. This is enough for existing > use in PSCI code, but TEE mediator will need a call that is > fully compatible with ARM SMCCC. > This