[Qemu-devel] [PULL buildfix] QOM CPUState patch queue 2012-11-02

[Qemu-devel] [PULL buildfix] QOM CPUState patch queue 2012-11-02

[Andreas Färber]

Hello,

Here's a build fix for {i386,x86_64}-linux-user. Please pull.

Regards,
Andreas


The following changes since commit 4ba79505f43bd0ace35c3fe42197eb02e7e0478e:

  Merge remote-tracking branch 'kraxel/pixman.v3' into staging (2012-11-01 11:14:39 -0500)

are available in the git repository at:


  git://github.com/afaerber/qemu-cpu.git qom-cpu

for you to fetch changes up to e4ab0d6b0d1118a90238d8194eedb91aab15ebe1:

  target-i386: cpu: fix --disable-kvm compilation (2012-11-02 17:55:29 +0100)

----------------------------------------------------------------
Eduardo Habkost (1):
      target-i386: cpu: fix --disable-kvm compilation

 target-i386/cpu.c |    4 ++++
 1 Datei geändert, 4 Zeilen hinzugefügt(+)

[Qemu-devel] [PATCH] target-i386: cpu: fix --disable-kvm compilation

[Andreas Färber]

From: Eduardo Habkost <ehabkost@redhat.com>

This fixes the following:
  target-i386/cpu.o: In function `kvm_cpu_fill_host':
  target-i386/cpu.c:783: undefined reference to `kvm_state'

I didn't notice the problem before because GCC was optimizing the entire
kvm_cpu_fill_host() function out (because all calls are conditional on
kvm_enabled()).

* cpu_x86_fill_model_id() is used only if CONFIG_KVM is set, so #ifdef it
  entirely to avoid compiler warnings.

* kvm_cpu_fill_host() should be called only if KVM is enabled, so
  use #ifdef CONFIG_KVM around the entire function body.

Reported-by: Andreas Färber <afaerber@suse.de>
Signed-off-by: Eduardo Habkost <ehabkost@redhat.com>
Signed-off-by: Andreas Färber <afaerber@suse.de>
---
 target-i386/cpu.c |    4 ++++
 1 Datei geändert, 4 Zeilen hinzugefügt(+)

diff --git a/target-i386/cpu.c b/target-i386/cpu.c
index c46286a..e1db639 100644
--- a/target-i386/cpu.c
+++ b/target-i386/cpu.c
@@ -758,6 +758,7 @@ static x86_def_t builtin_x86_defs[] = {
     },
 };
 
+#ifdef CONFIG_KVM
 static int cpu_x86_fill_model_id(char *str)
 {
     uint32_t eax = 0, ebx = 0, ecx = 0, edx = 0;
@@ -772,6 +773,7 @@ static int cpu_x86_fill_model_id(char *str)
     }
     return 0;
 }
+#endif
 
 /* Fill a x86_def_t struct with information about the host CPU, and
  * the CPU features supported by the host hardware + host kernel
@@ -780,6 +782,7 @@ static int cpu_x86_fill_model_id(char *str)
  */
 static void kvm_cpu_fill_host(x86_def_t *x86_cpu_def)
 {
+#ifdef CONFIG_KVM
     KVMState *s = kvm_state;
     uint32_t eax = 0, ebx = 0, ecx = 0, edx = 0;
 
@@ -838,6 +841,7 @@ static void kvm_cpu_fill_host(x86_def_t *x86_cpu_def)
      * unsupported ones later.
      */
     x86_cpu_def->svm_features = -1;
+#endif /* CONFIG_KVM */
 }
 
 static int unavailable_host_feature(struct model_features_t *f, uint32_t mask)
-- 
1.7.10.4

Re: [Qemu-devel] [PULL buildfix] QOM CPUState patch queue 2012-11-02

[Anthony Liguori]

Andreas Färber <afaerber@suse.de> writes:

> Hello,
>
> Here's a build fix for {i386,x86_64}-linux-user. Please pull.

Pulled. Thanks.

Regards,

Anthony Liguori

>
> Regards,
> Andreas
>
>
> The following changes since commit 4ba79505f43bd0ace35c3fe42197eb02e7e0478e:
>
>   Merge remote-tracking branch 'kraxel/pixman.v3' into staging (2012-11-01 11:14:39 -0500)
>
> are available in the git repository at:
>
>
>   git://github.com/afaerber/qemu-cpu.git qom-cpu
>
> for you to fetch changes up to e4ab0d6b0d1118a90238d8194eedb91aab15ebe1:
>
>   target-i386: cpu: fix --disable-kvm compilation (2012-11-02 17:55:29 +0100)
>
> ----------------------------------------------------------------
> Eduardo Habkost (1):
>       target-i386: cpu: fix --disable-kvm compilation
>
>  target-i386/cpu.c |    4 ++++
>  1 Datei geändert, 4 Zeilen hinzugefügt(+)

Re: [Qemu-devel] [PATCH 27/28] target-i386: kvm_cpu_fill_host: use GET_SUPPORTED_CPUID

[Eduardo Habkost]

On Fri, Nov 02, 2012 at 04:34:00PM +0100, Andreas Färber wrote:
> Am 31.10.2012 10:40, schrieb Marcelo Tosatti:
> > From: Eduardo Habkost <ehabkost@redhat.com>
> > 
> > Change the kvm_cpu_fill_host() function to use
> > kvm_arch_get_supported_cpuid() instead of running the CPUID instruction
> > directly, when checking for supported CPUID features.
> > 
> > This should solve two problems at the same time:
> > 
> >  * "-cpu host" was not enabling features that don't need support on
> >    the host CPU (e.g. x2apic);
> >  * "check" and "enforce" options were not detecting problems when the
> >    host CPU did support a feature, but the KVM kernel code didn't
> >    support it.
> > 
> > Signed-off-by: Eduardo Habkost <ehabkost@redhat.com>
> > Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
> > ---
> >  target-i386/cpu.c |   25 +++++++++++++++----------
> >  1 files changed, 15 insertions(+), 10 deletions(-)
> > 
> > diff --git a/target-i386/cpu.c b/target-i386/cpu.c
> > index 390ed47..4c84e9f 100644
> > --- a/target-i386/cpu.c
> > +++ b/target-i386/cpu.c
> > @@ -773,13 +773,13 @@ static int cpu_x86_fill_model_id(char *str)
> >   */
> >  static void kvm_cpu_fill_host(x86_def_t *x86_cpu_def)
> >  {
> > +    KVMState *s = kvm_state;
> 
> This broke the linux-user build:
> 
> target-i386/cpu.o: In function `kvm_cpu_fill_host':
> /home/andreas/QEMU/qemu-rcar/target-i386/cpu.c:783: undefined reference
> to `kvm_state'
> collect2: error: ld returned 1 exit status
> make[1]: *** [qemu-i386] Fehler 1
> make: *** [subdir-i386-linux-user] Fehler 2
> 
> Any idea how to fix?

This function should never be called without CONFIG_KVM, so we can
#ifdef out the whole function body. I will send a patch shortly.


> 
> Andreas
> 
> >      uint32_t eax = 0, ebx = 0, ecx = 0, edx = 0;
> >  
> >      assert(kvm_enabled());
> >  
> >      x86_cpu_def->name = "host";
> >      host_cpuid(0x0, 0, &eax, &ebx, &ecx, &edx);
> > -    x86_cpu_def->level = eax;
> >      x86_cpu_def->vendor1 = ebx;
> >      x86_cpu_def->vendor2 = edx;
> >      x86_cpu_def->vendor3 = ecx;
> > @@ -788,21 +788,24 @@ static void kvm_cpu_fill_host(x86_def_t *x86_cpu_def)
> >      x86_cpu_def->family = ((eax >> 8) & 0x0F) + ((eax >> 20) & 0xFF);
> >      x86_cpu_def->model = ((eax >> 4) & 0x0F) | ((eax & 0xF0000) >> 12);
> >      x86_cpu_def->stepping = eax & 0x0F;
> > -    x86_cpu_def->ext_features = ecx;
> > -    x86_cpu_def->features = edx;
> > +
> > +    x86_cpu_def->level = kvm_arch_get_supported_cpuid(s, 0x0, 0, R_EAX);
> > +    x86_cpu_def->features = kvm_arch_get_supported_cpuid(s, 0x1, 0, R_EDX);
> > +    x86_cpu_def->ext_features = kvm_arch_get_supported_cpuid(s, 0x1, 0, R_ECX);
> >  
> >      if (x86_cpu_def->level >= 7) {
> > -        x86_cpu_def->cpuid_7_0_ebx_features = kvm_arch_get_supported_cpuid(kvm_state, 0x7, 0, R_EBX);
> > +        x86_cpu_def->cpuid_7_0_ebx_features =
> > +                    kvm_arch_get_supported_cpuid(s, 0x7, 0, R_EBX);
> >      } else {
> >          x86_cpu_def->cpuid_7_0_ebx_features = 0;
> >      }
> >  
> > -    host_cpuid(0x80000000, 0, &eax, &ebx, &ecx, &edx);
> > -    x86_cpu_def->xlevel = eax;
> > +    x86_cpu_def->xlevel = kvm_arch_get_supported_cpuid(s, 0x80000000, 0, R_EAX);
> > +    x86_cpu_def->ext2_features =
> > +                kvm_arch_get_supported_cpuid(s, 0x80000001, 0, R_EDX);
> > +    x86_cpu_def->ext3_features =
> > +                kvm_arch_get_supported_cpuid(s, 0x80000001, 0, R_ECX);
> >  
> > -    host_cpuid(0x80000001, 0, &eax, &ebx, &ecx, &edx);
> > -    x86_cpu_def->ext2_features = edx;
> > -    x86_cpu_def->ext3_features = ecx;
> >      cpu_x86_fill_model_id(x86_cpu_def->model_id);
> >      x86_cpu_def->vendor_override = 0;
> >  
> > @@ -811,11 +814,13 @@ static void kvm_cpu_fill_host(x86_def_t *x86_cpu_def)
> >          x86_cpu_def->vendor2 == CPUID_VENDOR_VIA_2 &&
> >          x86_cpu_def->vendor3 == CPUID_VENDOR_VIA_3) {
> >          host_cpuid(0xC0000000, 0, &eax, &ebx, &ecx, &edx);
> > +        eax = kvm_arch_get_supported_cpuid(s, 0xC0000000, 0, R_EAX);
> >          if (eax >= 0xC0000001) {
> >              /* Support VIA max extended level */
> >              x86_cpu_def->xlevel2 = eax;
> >              host_cpuid(0xC0000001, 0, &eax, &ebx, &ecx, &edx);
> > -            x86_cpu_def->ext4_features = edx;
> > +            x86_cpu_def->ext4_features =
> > +                    kvm_arch_get_supported_cpuid(s, 0xC0000001, 0, R_EDX);
> >          }
> >      }
> >  
> > 
> 
> 
> -- 
> SUSE LINUX Products GmbH, Maxfeldstr. 5, 90409 Nürnberg, Germany
> GF: Jeff Hawn, Jennifer Guild, Felix Imendörffer; HRB 16746 AG Nürnberg

-- 
Eduardo

[Qemu-devel] [PATCH] target-i386: cpu: fix --disable-kvm compilation

[Eduardo Habkost]

This fixes the following:
  target-i386/cpu.o: In function `kvm_cpu_fill_host':
  target-i386/cpu.c:783: undefined reference to `kvm_state'

I didn't notice the problem before because GCC was optimizing the entire
kvm_cpu_fill_host() function out (because all calls are conditional on
kvm_enabled()).

* cpu_x86_fill_model_id() is used only if CONFIG_KVM is set, so #ifdef it
  entirely to avoid compiler warnings.

* kvm_cpu_fill_host() should be called only if KVM is enabled, so
  use #ifdef CONFIG_KVM around the entire function body.

Reported-by: Andreas Färber <afaerber@suse.de>
Signed-off-by: Eduardo Habkost <ehabkost@redhat.com>
---
 target-i386/cpu.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/target-i386/cpu.c b/target-i386/cpu.c
index c46286a..e1db639 100644
--- a/target-i386/cpu.c
+++ b/target-i386/cpu.c
@@ -758,6 +758,7 @@ static x86_def_t builtin_x86_defs[] = {
     },
 };
 
+#ifdef CONFIG_KVM
 static int cpu_x86_fill_model_id(char *str)
 {
     uint32_t eax = 0, ebx = 0, ecx = 0, edx = 0;
@@ -772,6 +773,7 @@ static int cpu_x86_fill_model_id(char *str)
     }
     return 0;
 }
+#endif
 
 /* Fill a x86_def_t struct with information about the host CPU, and
  * the CPU features supported by the host hardware + host kernel
@@ -780,6 +782,7 @@ static int cpu_x86_fill_model_id(char *str)
  */
 static void kvm_cpu_fill_host(x86_def_t *x86_cpu_def)
 {
+#ifdef CONFIG_KVM
     KVMState *s = kvm_state;
     uint32_t eax = 0, ebx = 0, ecx = 0, edx = 0;
 
@@ -838,6 +841,7 @@ static void kvm_cpu_fill_host(x86_def_t *x86_cpu_def)
      * unsupported ones later.
      */
     x86_cpu_def->svm_features = -1;
+#endif /* CONFIG_KVM */
 }
 
 static int unavailable_host_feature(struct model_features_t *f, uint32_t mask)
-- 
1.7.11.7

Re: [Qemu-devel] [PATCH] target-i386: cpu: fix --disable-kvm compilation

[Andreas Färber]

Am 02.11.2012 17:25, schrieb Eduardo Habkost:
> This fixes the following:
>   target-i386/cpu.o: In function `kvm_cpu_fill_host':
>   target-i386/cpu.c:783: undefined reference to `kvm_state'
> 
> I didn't notice the problem before because GCC was optimizing the entire
> kvm_cpu_fill_host() function out (because all calls are conditional on
> kvm_enabled()).
> 
> * cpu_x86_fill_model_id() is used only if CONFIG_KVM is set, so #ifdef it
>   entirely to avoid compiler warnings.
> 
> * kvm_cpu_fill_host() should be called only if KVM is enabled, so
>   use #ifdef CONFIG_KVM around the entire function body.
> 
> Reported-by: Andreas Färber <afaerber@suse.de>
> Signed-off-by: Eduardo Habkost <ehabkost@redhat.com>

Acked-by: Andreas Färber <afaerber@suse.de>

If no one objects to this solution, unless Marcelo or Avi beat me, I'll
send out an urgent pull request as requested by Anthony.

Thanks,
Andreas

> ---
>  target-i386/cpu.c | 4 ++++
>  1 file changed, 4 insertions(+)
> 
> diff --git a/target-i386/cpu.c b/target-i386/cpu.c
> index c46286a..e1db639 100644
> --- a/target-i386/cpu.c
> +++ b/target-i386/cpu.c
> @@ -758,6 +758,7 @@ static x86_def_t builtin_x86_defs[] = {
>      },
>  };
>  
> +#ifdef CONFIG_KVM
>  static int cpu_x86_fill_model_id(char *str)
>  {
>      uint32_t eax = 0, ebx = 0, ecx = 0, edx = 0;
> @@ -772,6 +773,7 @@ static int cpu_x86_fill_model_id(char *str)
>      }
>      return 0;
>  }
> +#endif
>  
>  /* Fill a x86_def_t struct with information about the host CPU, and
>   * the CPU features supported by the host hardware + host kernel
> @@ -780,6 +782,7 @@ static int cpu_x86_fill_model_id(char *str)
>   */
>  static void kvm_cpu_fill_host(x86_def_t *x86_cpu_def)
>  {
> +#ifdef CONFIG_KVM
>      KVMState *s = kvm_state;
>      uint32_t eax = 0, ebx = 0, ecx = 0, edx = 0;
>  
> @@ -838,6 +841,7 @@ static void kvm_cpu_fill_host(x86_def_t *x86_cpu_def)
>       * unsupported ones later.
>       */
>      x86_cpu_def->svm_features = -1;
> +#endif /* CONFIG_KVM */
>  }
>  
>  static int unavailable_host_feature(struct model_features_t *f, uint32_t mask)
> 


-- 
SUSE LINUX Products GmbH, Maxfeldstr. 5, 90409 Nürnberg, Germany
GF: Jeff Hawn, Jennifer Guild, Felix Imendörffer; HRB 16746 AG Nürnberg