| Message ID | 20240308015435.4044339-3-xin.wang2@amd.com (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
| Series | DOMCTL-based guest magic regions allocation for dom0less | expand |
Hi Henry, On 08/03/2024 02:54, Henry Wang wrote: > Currently direct mapped domain is only supported by the Arm > architecture at the domain creation time by setting the CDF_directmap > flag. There is not a need for every non-Arm architecture, i.e. x86, > RISC-V and PPC, to define a stub is_domain_direct_mapped() in arch > header. > > Move is_domain_direct_mapped() to a centralized place at xen/domain.h > and evaluate CDF_directmap for non-Arm architecture to 0. > > Signed-off-by: Henry Wang <xin.wang2@amd.com> Shouldn't you add Suggested-by: Jan? Reviewed-by: Michal Orzel <michal.orzel@amd.com> Another alternative would be to let the arch header define it if needed and use a centralized stub in xen/domain.h: #ifndef is_domain_direct_mapped #define is_domain_direct_mapped(d) ((void)(d), 0) #endif I'm not sure which solution is better. ~Michal
Hi Michal, On 3/8/2024 4:59 PM, Michal Orzel wrote: > Hi Henry, > > On 08/03/2024 02:54, Henry Wang wrote: >> Currently direct mapped domain is only supported by the Arm >> architecture at the domain creation time by setting the CDF_directmap >> flag. There is not a need for every non-Arm architecture, i.e. x86, >> RISC-V and PPC, to define a stub is_domain_direct_mapped() in arch >> header. >> >> Move is_domain_direct_mapped() to a centralized place at xen/domain.h >> and evaluate CDF_directmap for non-Arm architecture to 0. >> >> Signed-off-by: Henry Wang <xin.wang2@amd.com> > Shouldn't you add Suggested-by: Jan? Yeah indeed I should have added it. I always have a hard time to determine if I should add "Suggested-by"/"Reported-by" tags, sorry for missing it this time. I will add it in the next version. > Reviewed-by: Michal Orzel <michal.orzel@amd.com> Thanks! > Another alternative would be to let the arch header define it if needed and use a centralized stub in xen/domain.h: > > #ifndef is_domain_direct_mapped > #define is_domain_direct_mapped(d) ((void)(d), 0) > #endif > > I'm not sure which solution is better. Thanks for the suggestion. I am fine with either way, so let's see what the others would say and I will do the update of this patch accordingly. Kind regards, Henry > ~Michal
On 08.03.2024 10:06, Henry Wang wrote: > On 3/8/2024 4:59 PM, Michal Orzel wrote: >> Another alternative would be to let the arch header define it if needed and use a centralized stub in xen/domain.h: >> >> #ifndef is_domain_direct_mapped >> #define is_domain_direct_mapped(d) ((void)(d), 0) >> #endif >> >> I'm not sure which solution is better. > > Thanks for the suggestion. I am fine with either way, so let's see what > the others would say and I will do the update of this patch accordingly. While I wouldn't strictly mind the addition of an #ifdef, I'd prefer it to be omitted until such time when an arch would really want to override it. IOW patch as-is Reviewed-by: Jan Beulich <jbeulich@suse.com> Jan
Hi Henry, On 3/7/24 7:54 PM, Henry Wang wrote: > Currently direct mapped domain is only supported by the Arm > architecture at the domain creation time by setting the CDF_directmap > flag. There is not a need for every non-Arm architecture, i.e. x86, > RISC-V and PPC, to define a stub is_domain_direct_mapped() in arch > header. > > Move is_domain_direct_mapped() to a centralized place at xen/domain.h > and evaluate CDF_directmap for non-Arm architecture to 0. > > Signed-off-by: Henry Wang <xin.wang2@amd.com> Regardless of whether or not you decide to go with the centralized ifdef approach suggested by Michal, consider the PPC parts: Acked-by: Shawn Anastasio <sanastasio@raptorengineering.com> Thanks, Shawn
diff --git a/xen/arch/arm/include/asm/domain.h b/xen/arch/arm/include/asm/domain.h index 8218afb862..f1d72c6e48 100644 --- a/xen/arch/arm/include/asm/domain.h +++ b/xen/arch/arm/include/asm/domain.h @@ -29,8 +29,6 @@ enum domain_type { #define is_64bit_domain(d) (0) #endif -#define is_domain_direct_mapped(d) ((d)->cdf & CDF_directmap) - /* * Is the domain using the host memory layout? * diff --git a/xen/arch/ppc/include/asm/domain.h b/xen/arch/ppc/include/asm/domain.h index 573276d0a8..3a447272c6 100644 --- a/xen/arch/ppc/include/asm/domain.h +++ b/xen/arch/ppc/include/asm/domain.h @@ -10,8 +10,6 @@ struct hvm_domain uint64_t params[HVM_NR_PARAMS]; }; -#define is_domain_direct_mapped(d) ((void)(d), 0) - /* TODO: Implement */ #define guest_mode(r) ({ (void)(r); BUG_ON("unimplemented"); 0; }) diff --git a/xen/arch/riscv/include/asm/domain.h b/xen/arch/riscv/include/asm/domain.h index 0f5dc2be40..027bfa8a93 100644 --- a/xen/arch/riscv/include/asm/domain.h +++ b/xen/arch/riscv/include/asm/domain.h @@ -10,8 +10,6 @@ struct hvm_domain uint64_t params[HVM_NR_PARAMS]; }; -#define is_domain_direct_mapped(d) ((void)(d), 0) - struct arch_vcpu_io { }; diff --git a/xen/arch/x86/include/asm/domain.h b/xen/arch/x86/include/asm/domain.h index 622d22bef2..4bd78e3a6d 100644 --- a/xen/arch/x86/include/asm/domain.h +++ b/xen/arch/x86/include/asm/domain.h @@ -22,7 +22,6 @@ #define is_hvm_pv_evtchn_domain(d) (is_hvm_domain(d) && \ ((d)->arch.hvm.irq->callback_via_type == HVMIRQ_callback_vector || \ (d)->vcpu[0]->arch.hvm.evtchn_upcall_vector)) -#define is_domain_direct_mapped(d) ((void)(d), 0) #define VCPU_TRAP_NONE 0 #define VCPU_TRAP_NMI 1 diff --git a/xen/include/xen/domain.h b/xen/include/xen/domain.h index b1a4aa6f38..3de5635291 100644 --- a/xen/include/xen/domain.h +++ b/xen/include/xen/domain.h @@ -41,6 +41,8 @@ void arch_get_domain_info(const struct domain *d, #ifdef CONFIG_ARM /* Should domain memory be directly mapped? */ #define CDF_directmap (1U << 1) +#else +#define CDF_directmap 0 #endif /* Is domain memory on static allocation? */ #ifdef CONFIG_STATIC_MEMORY @@ -49,6 +51,7 @@ void arch_get_domain_info(const struct domain *d, #define CDF_staticmem 0 #endif +#define is_domain_direct_mapped(d) ((d)->cdf & CDF_directmap) #define is_domain_using_staticmem(d) ((d)->cdf & CDF_staticmem) /*
Currently direct mapped domain is only supported by the Arm architecture at the domain creation time by setting the CDF_directmap flag. There is not a need for every non-Arm architecture, i.e. x86, RISC-V and PPC, to define a stub is_domain_direct_mapped() in arch header. Move is_domain_direct_mapped() to a centralized place at xen/domain.h and evaluate CDF_directmap for non-Arm architecture to 0. Signed-off-by: Henry Wang <xin.wang2@amd.com> --- v2: - New patch --- xen/arch/arm/include/asm/domain.h | 2 -- xen/arch/ppc/include/asm/domain.h | 2 -- xen/arch/riscv/include/asm/domain.h | 2 -- xen/arch/x86/include/asm/domain.h | 1 - xen/include/xen/domain.h | 3 +++ 5 files changed, 3 insertions(+), 7 deletions(-)