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Date: Wed, 6 Jan 2021 15:52:35 +0800 From: Shuo A Liu <shuo.a.liu@...el.com> To: Borislav Petkov <bp@...en8.de> Cc: linux-kernel@...r.kernel.org, x86@...nel.org, Greg Kroah-Hartman <gregkh@...uxfoundation.org>, "H . Peter Anvin" <hpa@...or.com>, Thomas Gleixner <tglx@...utronix.de>, Ingo Molnar <mingo@...hat.com>, Sean Christopherson <sean.j.christopherson@...el.com>, Yu Wang <yu1.wang@...el.com>, Reinette Chatre <reinette.chatre@...el.com>, Yakui Zhao <yakui.zhao@...el.com>, Nick Desaulniers <ndesaulniers@...gle.com>, Dave Hansen <dave.hansen@...el.com>, Dan Williams <dan.j.williams@...el.com>, Fengwei Yin <fengwei.yin@...el.com>, Zhi Wang <zhi.a.wang@...el.com>, Zhenyu Wang <zhenyuw@...ux.intel.com>, Arvind Sankar <nivedita@...m.mit.edu>, Peter Zijlstra <peterz@...radead.org>, Segher Boessenkool <segher@...nel.crashing.org> Subject: Re: [PATCH v6 04/18] x86/acrn: Introduce hypercall interfaces On Wed 30.Dec'20 at 18:33:05 +0100, Borislav Petkov wrote: >On Tue, Dec 01, 2020 at 05:38:39PM +0800, shuo.a.liu@...el.com wrote: >> From: Shuo Liu <shuo.a.liu@...el.com> >> >> The Service VM communicates with the hypervisor via conventional >> hypercalls. VMCALL instruction is used to make the hypercalls. >> >> ACRN hypercall ABI: >> * Hypercall number is in R8 register. >> * Up to 2 parameters are in RDI and RSI registers. >> * Return value is in RAX register. >> >> Introduce the ACRN hypercall interfaces. Because GCC doesn't support R8 >> register as direct register constraints, use supported constraint as >> input with a explicit MOV to R8 in beginning of asm. >> >> Originally-by: Yakui Zhao <yakui.zhao@...el.com> >> Signed-off-by: Shuo Liu <shuo.a.liu@...el.com> >> Reviewed-by: Reinette Chatre <reinette.chatre@...el.com> >> Reviewed-by: Nick Desaulniers <ndesaulniers@...gle.com> >> Cc: Dave Hansen <dave.hansen@...el.com> >> Cc: Sean Christopherson <sean.j.christopherson@...el.com> >> Cc: Dan Williams <dan.j.williams@...el.com> >> Cc: Fengwei Yin <fengwei.yin@...el.com> >> Cc: Zhi Wang <zhi.a.wang@...el.com> >> Cc: Zhenyu Wang <zhenyuw@...ux.intel.com> >> Cc: Yu Wang <yu1.wang@...el.com> >> Cc: Reinette Chatre <reinette.chatre@...el.com> >> Cc: Greg Kroah-Hartman <gregkh@...uxfoundation.org> >> Cc: Borislav Petkov <bp@...en8.de> >> Cc: Arvind Sankar <nivedita@...m.mit.edu> >> Cc: Peter Zijlstra <peterz@...radead.org> >> Cc: Nick Desaulniers <ndesaulniers@...gle.com> >> Cc: Segher Boessenkool <segher@...nel.crashing.org> >> --- >> arch/x86/include/asm/acrn.h | 54 +++++++++++++++++++++++++++++++++++++ >> 1 file changed, 54 insertions(+) > >The x86 bits in patches 2-4 look ok now, thanks! > >Acked-by: Borislav Petkov <bp@...e.de> Thanks for review! Shuo
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