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authorAndrew Cooper <andrew.cooper3@citrix.com>2019-07-15 18:16:41 +0300
committerThomas Gleixner <tglx@linutronix.de>2019-07-22 11:12:33 +0300
commit83b584d9c6a1494170abd3a8b24f41939b23d625 (patch)
treed1cd396adbb7280482b290a423d09005b4dd0d6d /arch/x86/xen
parent229b969b3d38bc28bcd55841ee7ca9a9afb922f3 (diff)
downloadlinux-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.c15
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,