Re: [Xen-devel] [V0 PATCH] pvh: expose feature flags from tools for domUs

[Ian Campbell <Ian.Campbell@xxxxxxxxxx>]

On Fri, 2014-01-24 at 17:13 -0800, Mukesh Rathor wrote:
> Expose features for pvh domUs from tools.
> 

I assume this is targeting 4.5?

> Signed-off-by: Mukesh Rathor <mukesh.rathor@xxxxxxxxxx>
> ---
>  tools/libxc/xc_cpuid_x86.c |   26 ++++++++++++++++----------
>  tools/libxc/xc_domain.c    |    1 +
>  tools/libxc/xenctrl.h      |    2 +-
>  3 files changed, 18 insertions(+), 11 deletions(-)
> 
> diff --git a/tools/libxc/xc_cpuid_x86.c b/tools/libxc/xc_cpuid_x86.c
> index bbbf9b8..33f6829 100644
> --- a/tools/libxc/xc_cpuid_x86.c
> +++ b/tools/libxc/xc_cpuid_x86.c
> @@ -433,7 +433,7 @@ static void xc_cpuid_hvm_policy(
>  
>  static void xc_cpuid_pv_policy(
>      xc_interface *xch, domid_t domid,
> -    const unsigned int *input, unsigned int *regs)
> +    const unsigned int *input, unsigned int *regs, int is_pvh)
>  {
>      DECLARE_DOMCTL;
>      unsigned int guest_width;
> @@ -455,13 +455,16 @@ static void xc_cpuid_pv_policy(
>  
>      if ( (input[0] & 0x7fffffff) == 0x00000001 )
>      {
> -        clear_bit(X86_FEATURE_VME, regs[3]);
> -        clear_bit(X86_FEATURE_PSE, regs[3]);
> -        clear_bit(X86_FEATURE_PGE, regs[3]);
> -        clear_bit(X86_FEATURE_MCE, regs[3]);
> -        clear_bit(X86_FEATURE_MCA, regs[3]);
> +        if ( !is_pvh )
> +        {
> +            clear_bit(X86_FEATURE_VME, regs[3]);
> +            clear_bit(X86_FEATURE_PSE, regs[3]);
> +            clear_bit(X86_FEATURE_PGE, regs[3]);
> +            clear_bit(X86_FEATURE_MCE, regs[3]);
> +            clear_bit(X86_FEATURE_MCA, regs[3]);
> +            clear_bit(X86_FEATURE_PSE36, regs[3]);
> +        }
>          clear_bit(X86_FEATURE_MTRR, regs[3]);
> -        clear_bit(X86_FEATURE_PSE36, regs[3]);
>      }
>  
>      switch ( input[0] )
> @@ -524,8 +527,11 @@ static void xc_cpuid_pv_policy(
>          {
>              set_bit(X86_FEATURE_SYSCALL, regs[3]);
>          }
> -        clear_bit(X86_FEATURE_PAGE1GB, regs[3]);
> -        clear_bit(X86_FEATURE_RDTSCP, regs[3]);
> +        if ( !is_pvh )
> +        {
> +            clear_bit(X86_FEATURE_PAGE1GB, regs[3]);
> +            clear_bit(X86_FEATURE_RDTSCP, regs[3]);
> +        }
>  
>          clear_bit(X86_FEATURE_SVM, regs[2]);
>          clear_bit(X86_FEATURE_OSVW, regs[2]);
> @@ -561,7 +567,7 @@ static int xc_cpuid_policy(
>      if ( info.hvm )
>          xc_cpuid_hvm_policy(xch, domid, input, regs);
>      else
> -        xc_cpuid_pv_policy(xch, domid, input, regs);
> +        xc_cpuid_pv_policy(xch, domid, input, regs, info.pvh);
>  
>      return 0;
>  }
> diff --git a/tools/libxc/xc_domain.c b/tools/libxc/xc_domain.c
> index c2fdd74..f12999a 100644
> --- a/tools/libxc/xc_domain.c
> +++ b/tools/libxc/xc_domain.c
> @@ -316,6 +316,7 @@ int xc_domain_getinfo(xc_interface *xch,
>          info->running  = !!(domctl.u.getdomaininfo.flags&XEN_DOMINF_running);
>          info->hvm      = 
> !!(domctl.u.getdomaininfo.flags&XEN_DOMINF_hvm_guest);
>          info->debugged = 
> !!(domctl.u.getdomaininfo.flags&XEN_DOMINF_debugged);
> +        info->pvh      = 
> !!(domctl.u.getdomaininfo.flags&XEN_DOMINF_pvh_guest);
>  
>          info->shutdown_reason =
>              (domctl.u.getdomaininfo.flags>>XEN_DOMINF_shutdownshift) &
> diff --git a/tools/libxc/xenctrl.h b/tools/libxc/xenctrl.h
> index 13f816b..77d219a 100644
> --- a/tools/libxc/xenctrl.h
> +++ b/tools/libxc/xenctrl.h
> @@ -404,7 +404,7 @@ typedef struct xc_dominfo {
>      uint32_t      ssidref;
>      unsigned int  dying:1, crashed:1, shutdown:1,
>                    paused:1, blocked:1, running:1,
> -                  hvm:1, debugged:1;
> +                  hvm:1, debugged:1, pvh:1;
>      unsigned int  shutdown_reason; /* only meaningful if shutdown==1 */
>      unsigned long nr_pages; /* current number, not maximum */
>      unsigned long nr_outstanding_pages;



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