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KVM/arm64 fixes for 6.1, take #2

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- Fix a bug preventing restoring an ITS containing mappings
   for very large and very sparse device topology
 
 - Work around a relocation handling error when compiling
   the nVHE object with profile optimisation
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Merge tag 'kvmarm-fixes-6.1-2' of git://git.kernel.org/pub/scm/linux/kernel/git/kvmarm/kvmarm into HEAD

KVM/arm64 fixes for 6.1, take #2

- Fix a bug preventing restoring an ITS containing mappings
  for very large and very sparse device topology

- Work around a relocation handling error when compiling
  the nVHE object with profile optimisation
This commit is contained in:
Paolo Bonzini 2022-10-22 03:33:26 -04:00
commit ebccb53e93
2 changed files with 8 additions and 1 deletions
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4
arch/arm64/kvm/hyp/nvhe/Makefile
View File

@ -92,6 +92,10 @@ quiet_cmd_hypcopy = HYPCOPY $@
# Remove ftrace, Shadow Call Stack, and CFI CFLAGS.
# This is equivalent to the 'notrace', '__noscs', and '__nocfi' annotations.
KBUILD_CFLAGS := $(filter-out $(CC_FLAGS_FTRACE) $(CC_FLAGS_SCS) $(CC_FLAGS_CFI), $(KBUILD_CFLAGS))
# Starting from 13.0.0 llvm emits SHT_REL section '.llvm.call-graph-profile'
# when profile optimization is applied. gen-hyprel does not support SHT_REL and
# causes a build failure. Remove profile optimization flags.
KBUILD_CFLAGS := $(filter-out -fprofile-sample-use=% -fprofile-use=%, $(KBUILD_CFLAGS))
# KVM nVHE code is run at a different exception code with a different map, so
# compiler instrumentation that inserts callbacks or checks into the code may

5
arch/arm64/kvm/vgic/vgic-its.c
View File

@ -2149,7 +2149,7 @@ static int scan_its_table(struct vgic_its *its, gpa_t base, int size, u32 esz,
memset(entry, 0, esz);
while (len > 0) {
while (true) {
int next_offset;
size_t byte_offset;
@ -2162,6 +2162,9 @@ static int scan_its_table(struct vgic_its *its, gpa_t base, int size, u32 esz,
return next_offset;
byte_offset = next_offset * esz;
if (byte_offset >= len)
break;
id += next_offset;
gpa += byte_offset;
len -= byte_offset;