linux/arch/arm64
Shanker Donthineni 68381b2b00 arm64: KVM: Optimize __guest_enter/exit() to save a few instructions
We are doing an unnecessary stack push/pop operation when restoring
the guest registers x0-x18 in __guest_enter(). This patch saves the
two instructions by using x18 as a base register. No need to store
the vcpu context pointer in stack because it is redundant, the same
information is available in tpidr_el2. The function __guest_exit()
calling convention is slightly modified, caller only pushes the regs
x0-x1 to stack instead of regs x0-x3.

Signed-off-by: Shanker Donthineni <shankerd@codeaurora.org>
Reviewed-by: Christoffer Dall <christoffer.dall@linaro.org>
Signed-off-by: Christoffer Dall <christoffer.dall@linaro.org>
2016-09-08 12:53:00 +02:00
..
boot ARM: SoC fixes 2016-08-11 14:14:23 -07:00
configs arm64: defconfig: enable CONFIG_LOCALVERSION_AUTO 2016-08-12 19:08:48 +01:00
crypto Merge branch 'linus' of git://git.kernel.org/pub/scm/linux/kernel/git/herbert/crypto-2.6 2016-03-17 11:22:54 -07:00
include arm64 fixes: 2016-08-13 19:29:46 -07:00
kernel arm64: hibernate: handle allocation failures 2016-08-12 19:08:33 +01:00
kvm arm64: KVM: Optimize __guest_enter/exit() to save a few instructions 2016-09-08 12:53:00 +02:00
lib arm64/uaccess: Enable hardened usercopy 2016-07-26 14:41:49 -07:00
mm arm64: Handle el1 synchronous instruction aborts cleanly 2016-08-12 17:58:48 +01:00
net arm64: bpf: optimize LD_ABS, LD_IND 2016-06-10 23:11:50 -07:00
xen arm/xen: add support for vm_assist hypercall 2016-07-06 10:42:14 +01:00
Kconfig Implements HARDENED_USERCOPY verification of copy_to_user/copy_from_user 2016-08-08 14:48:14 -07:00
Kconfig.debug arm64: enable CONFIG_SET_MODULE_RONX by default 2016-05-31 14:23:29 +01:00
Kconfig.platforms arm64: Kconfig: select HISILICON_IRQ_MBIGEN only if PCI is selected 2016-08-10 22:58:12 +02:00
Makefile arm64 fixes: 2016-08-06 08:58:59 -04:00