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| author | Andrew Cooper <andrew.cooper3@citrix.com> | 2019-07-15 18:16:41 +0300 |
|---|---|---|
| committer | Thomas Gleixner <tglx@linutronix.de> | 2019-07-22 11:12:33 +0300 |
| commit | 83b584d9c6a1494170abd3a8b24f41939b23d625 (patch) | |
| tree | d1cd396adbb7280482b290a423d09005b4dd0d6d /arch/x86/xen | |
| parent | 229b969b3d38bc28bcd55841ee7ca9a9afb922f3 (diff) | |
| download | linux-83b584d9c6a1494170abd3a8b24f41939b23d625.tar.xz | |
x86/paravirt: Drop {read,write}_cr8() hooks
There is a lot of infrastructure for functionality which is used
exclusively in __{save,restore}_processor_state() on the suspend/resume
path.
cr8 is an alias of APIC_TASKPRI, and APIC_TASKPRI is saved/restored by
lapic_{suspend,resume}(). Saving and restoring cr8 independently of the
rest of the Local APIC state isn't a clever thing to be doing.
Delete the suspend/resume cr8 handling, which shrinks the size of struct
saved_context, and allows for the removal of both PVOPS.
Signed-off-by: Andrew Cooper <andrew.cooper3@citrix.com>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Reviewed-by: Juergen Gross <jgross@suse.com>
Link: https://lkml.kernel.org/r/20190715151641.29210-1-andrew.cooper3@citrix.com
Diffstat (limited to 'arch/x86/xen')
| -rw-r--r-- | arch/x86/xen/enlighten_pv.c | 15 |
1 files changed, 0 insertions, 15 deletions
diff --git a/arch/x86/xen/enlighten_pv.c b/arch/x86/xen/enlighten_pv.c index 7ceb32821093..58f79ab32358 100644 --- a/arch/x86/xen/enlighten_pv.c +++ b/arch/x86/xen/enlighten_pv.c @@ -877,16 +877,6 @@ static void xen_write_cr4(unsigned long cr4) native_write_cr4(cr4); } -#ifdef CONFIG_X86_64 -static inline unsigned long xen_read_cr8(void) -{ - return 0; -} -static inline void xen_write_cr8(unsigned long val) -{ - BUG_ON(val); -} -#endif static u64 xen_read_msr_safe(unsigned int msr, int *err) { @@ -1023,11 +1013,6 @@ static const struct pv_cpu_ops xen_cpu_ops __initconst = { .write_cr4 = xen_write_cr4, -#ifdef CONFIG_X86_64 - .read_cr8 = xen_read_cr8, - .write_cr8 = xen_write_cr8, -#endif - .wbinvd = native_wbinvd, .read_msr = xen_read_msr, |