similar to: [PATCH] x86/paravirt: remove unused operation

Remove the paravirt operation "get_tsc_khz" as it is used nowhere. Signed-off-by: Juergen Gross <jgross at suse.com> --- arch/x86/include/asm/paravirt_types.h | 1 - 1 file changed, 1 deletion(-) diff --git a/arch/x86/include/asm/paravirt_types.h b/arch/x86/include/asm/paravirt_types.h index a6b8f9f..5a18a66 100644 --- a/arch/x86/include/asm/paravirt_types.h +++

Remove the paravirt operation "get_tsc_khz" as it is used nowhere. Signed-off-by: Juergen Gross <jgross at suse.com> --- arch/x86/include/asm/paravirt_types.h | 1 - 1 file changed, 1 deletion(-) diff --git a/arch/x86/include/asm/paravirt_types.h b/arch/x86/include/asm/paravirt_types.h index a6b8f9f..5a18a66 100644 --- a/arch/x86/include/asm/paravirt_types.h +++

Remove the paravirt operation "get_tsc_khz" as it is used nowhere. Signed-off-by: Juergen Gross <jgross at suse.com> Acked-by: Rusty Russell <rusty at rustcorp.com.au> --- arch/x86/include/asm/paravirt_types.h | 1 - 1 file changed, 1 deletion(-) diff --git a/arch/x86/include/asm/paravirt_types.h b/arch/x86/include/asm/paravirt_types.h index ce029e4..31247b5 100644 ---

Remove the paravirt operation "get_tsc_khz" as it is used nowhere. Signed-off-by: Juergen Gross <jgross at suse.com> Acked-by: Rusty Russell <rusty at rustcorp.com.au> --- arch/x86/include/asm/paravirt_types.h | 1 - 1 file changed, 1 deletion(-) diff --git a/arch/x86/include/asm/paravirt_types.h b/arch/x86/include/asm/paravirt_types.h index ce029e4..31247b5 100644 ---

Instead of using six globally visible paravirt ops structures combine them in a single structure, keeping the original structures as sub-structures. This avoids the need to assemble struct paravirt_patch_template at runtime on the stack each time apply_paravirt() is being called (i.e. when loading a module). Signed-off-by: Juergen Gross <jgross at suse.com> --- arch/x86/hyperv/mmu.c

From: Quan Xu <quan.xu0 at gmail.com> So far, pv_idle_ops.poll is the only ops for pv_idle. .poll is called in idle path which will poll for a while before we enter the real idle state. In virtualization, idle path includes several heavy operations includes timer access(LAPIC timer or TSC deadline timer) which will hurt performance especially for latency intensive workload like message

The only member of that structure is startup_ipi_hook which is always set to paravirt_nop. Signed-off-by: Juergen Gross <jgross at suse.com> --- arch/x86/include/asm/paravirt.h | 9 --------- arch/x86/include/asm/paravirt_types.h | 10 ---------- arch/x86/include/asm/smp.h | 3 --- arch/x86/kernel/paravirt.c | 8 -------- arch/x86/kernel/smpboot.c

The only member of that structure is startup_ipi_hook which is always set to paravirt_nop. Signed-off-by: Juergen Gross <jgross at suse.com> --- arch/x86/include/asm/paravirt.h | 9 --------- arch/x86/include/asm/paravirt_types.h | 10 ---------- arch/x86/include/asm/smp.h | 3 --- arch/x86/kernel/paravirt.c | 8 -------- arch/x86/kernel/smpboot.c

From: Borislav Petkov <bp at suse.de> paravirt_patch_ignore() is completely unused and paravirt_patch_nop() doesn't do a whole lot. Remove them both. Signed-off-by: Borislav Petkov <bp at suse.de> Cc: Andrew Morton <akpm at linux-foundation.org> Cc: Andy Lutomirski <luto at kernel.org> Cc: Chris Wright <chrisw at sous-sol.org> Cc: "H. Peter Anvin"

From: Borislav Petkov <bp at suse.de> paravirt_patch_ignore() is completely unused and paravirt_patch_nop() doesn't do a whole lot. Remove them both. Signed-off-by: Borislav Petkov <bp at suse.de> Cc: Andrew Morton <akpm at linux-foundation.org> Cc: Andy Lutomirski <luto at kernel.org> Cc: Chris Wright <chrisw at sous-sol.org> Cc: "H. Peter Anvin"

On 2017/8/29 21:55, Konrad Rzeszutek Wilk wrote: > On Tue, Aug 29, 2017 at 11:46:35AM +0000, Yang Zhang wrote: >> So far, pv_idle_ops.poll is the only ops for pv_idle. .poll is called in >> idle path which will polling for a while before we enter the real idle >> state. >> >> In virtualization, idle path includes several heavy operations >> includes timer

On 2017/8/29 21:55, Konrad Rzeszutek Wilk wrote: > On Tue, Aug 29, 2017 at 11:46:35AM +0000, Yang Zhang wrote: >> So far, pv_idle_ops.poll is the only ops for pv_idle. .poll is called in >> idle path which will polling for a while before we enter the real idle >> state. >> >> In virtualization, idle path includes several heavy operations >> includes timer

Commit 111e7b15cf10f6 ("x86/ioperm: Extend IOPL config to control ioperm() as well") reworked the iopl syscall to use I/O bitmaps. Unfortunately this broke Xen PV domains using that syscall as there is currently no I/O bitmap support in PV domains. Add I/O bitmap support via a new paravirt function update_io_bitmap which Xen PV domains can use to update their I/O bitmaps via a

Commit 111e7b15cf10f6 ("x86/ioperm: Extend IOPL config to control ioperm() as well") reworked the iopl syscall to use I/O bitmaps. Unfortunately this broke Xen PV domains using that syscall as there is currently no I/O bitmap support in PV domains. Add I/O bitmap support via a new paravirt function update_io_bitmap which Xen PV domains can use to update their I/O bitmaps via a

paravirt_disable_iospace() isn't used anywhere. Remove it. Signed-off-by: Juergen Gross <jgross at suse.com> --- arch/x86/include/asm/paravirt_types.h | 2 -- arch/x86/kernel/paravirt.c | 19 ------------------- 2 files changed, 21 deletions(-) diff --git a/arch/x86/include/asm/paravirt_types.h b/arch/x86/include/asm/paravirt_types.h index 7465d6fe336f..7a5de42cb465 100644

This is to fix some lock holder preemption issues. Some other locks implementation do a spin loop before acquiring the lock itself. Currently kernel has an interface of bool vcpu_is_preempted(int cpu). It takes the cpu as parameter and return true if the cpu is preempted. Then kernel can break the spin loops upon on the retval of vcpu_is_preempted. As kernel has used this interface, So lets

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 independently by lapic_{suspend,resume}(). Delete the saving and restoration of cr8, which allows for the removal of both PVOPS. Signed-off-by: Andrew Cooper <andrew.cooper3 at

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 independently by lapic_{suspend,resume}(). Delete the saving and restoration of cr8, which allows for the removal of both PVOPS. Signed-off-by: Andrew Cooper <andrew.cooper3 at

On Tue, Jul 30, 2019 at 12:12:54PM -0700, Thomas Garnier wrote: > if PIE is enabled, switch the paravirt assembly constraints to be > compatible. The %c/i constrains generate smaller code so is kept by > default. > > Position Independent Executable (PIE) support will allow to extend the > KASLR randomization range below 0xffffffff80000000. > > Signed-off-by: Thomas

On Tue, Jul 30, 2019 at 12:12:54PM -0700, Thomas Garnier wrote: > if PIE is enabled, switch the paravirt assembly constraints to be > compatible. The %c/i constrains generate smaller code so is kept by > default. > > Position Independent Executable (PIE) support will allow to extend the > KASLR randomization range below 0xffffffff80000000. > > Signed-off-by: Thomas