xen/arch/x86/acpi/suspend.c | 6 ++++-- xen/arch/x86/x86_64/traps.c | 2 +- 2 files changed, 5 insertions(+), 3 deletions(-)
Currently, configuration of the SYSENTER MSRs are behind a vendor check for
Intel and Centaur, but this misses Zhaoxin.
Use the feature bit, rather than a vendor check. cpu_has_sep is cleared early
for AMD processors, which can't use SYSENTER/SYSEXIT when operating in long
mode.
Suggested-by: Jan Beulich <JBeulich@suse.com>
Signed-off-by: Andrew Cooper <andrew.cooper3@citrix.com>
---
CC: Jan Beulich <JBeulich@suse.com>
CC: Wei Liu <wei.liu2@citrix.com>
CC: Roger Pau Monné <roger.pau@citrix.com>
CC: FionaLi-oc <fionali-oc@zhaoxin.com>
Please double check that this works for Zhaoxin. I've tried Intel and AMD.
---
xen/arch/x86/acpi/suspend.c | 6 ++++--
xen/arch/x86/x86_64/traps.c | 2 +-
2 files changed, 5 insertions(+), 3 deletions(-)
diff --git a/xen/arch/x86/acpi/suspend.c b/xen/arch/x86/acpi/suspend.c
index 9e69bf2..ba9d2e1 100644
--- a/xen/arch/x86/acpi/suspend.c
+++ b/xen/arch/x86/acpi/suspend.c
@@ -27,11 +27,13 @@ void save_rest_processor_state(void)
rdmsrl(MSR_SHADOW_GS_BASE, saved_kernel_gs_base);
rdmsrl(MSR_CSTAR, saved_cstar);
rdmsrl(MSR_LSTAR, saved_lstar);
- if ( boot_cpu_data.x86_vendor & (X86_VENDOR_INTEL | X86_VENDOR_CENTAUR) )
+
+ if ( cpu_has_sep )
{
rdmsrl(MSR_IA32_SYSENTER_ESP, saved_sysenter_esp);
rdmsrl(MSR_IA32_SYSENTER_EIP, saved_sysenter_eip);
}
+
if ( cpu_has_xsave )
saved_xcr0 = get_xcr0();
}
@@ -51,7 +53,7 @@ void restore_rest_processor_state(void)
wrgsbase(saved_gs_base);
wrmsrl(MSR_SHADOW_GS_BASE, saved_kernel_gs_base);
- if ( boot_cpu_data.x86_vendor & (X86_VENDOR_INTEL | X86_VENDOR_CENTAUR) )
+ if ( cpu_has_sep )
{
/* Recover sysenter MSRs */
wrmsrl(MSR_IA32_SYSENTER_ESP, saved_sysenter_esp);
diff --git a/xen/arch/x86/x86_64/traps.c b/xen/arch/x86/x86_64/traps.c
index 44af765..cb4bf0a 100644
--- a/xen/arch/x86/x86_64/traps.c
+++ b/xen/arch/x86/x86_64/traps.c
@@ -334,7 +334,7 @@ void subarch_percpu_traps_init(void)
(unsigned long)lstar_enter);
stub_va += offset;
- if ( boot_cpu_data.x86_vendor & (X86_VENDOR_INTEL | X86_VENDOR_CENTAUR) )
+ if ( cpu_has_sep )
{
/* SYSENTER entry. */
wrmsrl(MSR_IA32_SYSENTER_ESP, stack_bottom);
--
2.1.4
_______________________________________________
Xen-devel mailing list
Xen-devel@lists.xenproject.org
https://lists.xenproject.org/mailman/listinfo/xen-devel
>>> On 26.04.19 at 12:22, <andrew.cooper3@citrix.com> wrote: > Currently, configuration of the SYSENTER MSRs are behind a vendor check for > Intel and Centaur, but this misses Zhaoxin. > > Use the feature bit, rather than a vendor check. cpu_has_sep is cleared early > for AMD processors, which can't use SYSENTER/SYSEXIT when operating in long > mode. > > Suggested-by: Jan Beulich <JBeulich@suse.com> > Signed-off-by: Andrew Cooper <andrew.cooper3@citrix.com> Reviewed-by: Jan Beulich <jbeulich@suse.com> _______________________________________________ Xen-devel mailing list Xen-devel@lists.xenproject.org https://lists.xenproject.org/mailman/listinfo/xen-devel
© 2016 - 2024 Red Hat, Inc.