xiaomi-sm8450/android_kernel_xiaomi_sm8450
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

KVM: arm64: Migrate _elx sysreg accessors to msr_s/mrs_s

Browse Source 
Currently, the {read,write}_sysreg_el*() accessors for accessing
particular ELs' sysregs in the presence of VHE rely on some local
hacks and define their system register encodings in a way that is
inconsistent with the core definitions in <asm/sysreg.h>.

As a result, it is necessary to add duplicate definitions for any
system register that already needs a definition in sysreg.h for
other reasons.

This is a bit of a maintenance headache, and the reasons for the
_el*() accessors working the way they do is a bit historical.

This patch gets rid of the shadow sysreg definitions in
<asm/kvm_hyp.h>, converts the _el*() accessors to use the core
__msr_s/__mrs_s interface, and converts all call sites to use the
standard sysreg #define names (i.e., upper case, with SYS_ prefix).

This patch will conflict heavily anyway, so the opportunity
to clean up some bad whitespace in the context of the changes is
taken.

The change exposes a few system registers that have no sysreg.h
definition, due to msr_s/mrs_s being used in place of msr/mrs:
additions are made in order to fill in the gaps.

Signed-off-by: Dave Martin <Dave.Martin@arm.com>
Cc: Catalin Marinas <catalin.marinas@arm.com>
Cc: Christoffer Dall <christoffer.dall@arm.com>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Will Deacon <will.deacon@arm.com>
Link: https://www.spinics.net/lists/kvm-arm/msg31717.html
[Rebased to v4.21-rc1]
Signed-off-by: Sudeep Holla <sudeep.holla@arm.com>
[Rebased to v5.2-rc5, changelog updates]
Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
This commit is contained in:
Dave Martin
2019-04-06 11:29:40 +01:00
committed by Marc Zyngier
parent 49caebe9b3
commit fdec2a9ef8
11 changed files with 148 additions and 156 deletions
Download Patch File Download Diff File Expand all files Collapse all files

4
arch/arm64/kvm/regmap.c
View File

@@ -152,7 +152,7 @@ unsigned long vcpu_read_spsr32(const struct kvm_vcpu *vcpu)
switch (spsr_idx) {
case KVM_SPSR_SVC:
return read_sysreg_el1(spsr);
return read_sysreg_el1(SYS_SPSR);
case KVM_SPSR_ABT:
return read_sysreg(spsr_abt);
case KVM_SPSR_UND:
@@ -177,7 +177,7 @@ void vcpu_write_spsr32(struct kvm_vcpu *vcpu, unsigned long v)
switch (spsr_idx) {
case KVM_SPSR_SVC:
write_sysreg_el1(v, spsr);
write_sysreg_el1(v, SYS_SPSR);
case KVM_SPSR_ABT:
write_sysreg(v, spsr_abt);
case KVM_SPSR_UND: