Lazy-fpsimd support patch series#2: add fpsimd@Arm64 support to kvm module

Add fpsimd support to KVM module so that the test case "TestKernelFloatingPoint"
can be passed on Arm64 platform.

Signed-off-by: Bin Lu <bin.lu@arm.com>

2 files changed, 8 insertions, 2 deletions

diff --git a/pkg/sentry/platform/ring0/defs_arm64.go b/pkg/sentry/platform/ring0/defs_arm64.go
index 1583dda12..0e2ab716c 100644
--- a/pkg/sentry/platform/ring0/defs_arm64.go
+++ b/pkg/sentry/platform/ring0/defs_arm64.go
@@ -124,6 +124,12 @@ func (c *CPU) SetAppAddr(value uintptr) {
 	c.appAddr = value
 }
 
+// GetLazyVFP returns the value of cpacr_el1.
+//go:nosplit
+func (c *CPU) GetLazyVFP() (value uintptr) {
+	return c.lazyVFP
+}
+
 // SwitchArchOpts are embedded in SwitchOpts.
 type SwitchArchOpts struct {
 	// UserASID indicates that the application ASID to be used on switch,
diff --git a/pkg/sentry/platform/ring0/lib_arm64.go b/pkg/sentry/platform/ring0/lib_arm64.go
index af075aae4..80922f43d 100644
--- a/pkg/sentry/platform/ring0/lib_arm64.go
+++ b/pkg/sentry/platform/ring0/lib_arm64.go
@@ -20,13 +20,13 @@ package ring0
 func CPACREL1() (value uintptr)
 
 // FPCR returns the value of FPCR register.
-func FPCR() (value uintptr)
+func GetFPCR() (value uintptr)
 
 // SetFPCR writes the FPCR value.
 func SetFPCR(value uintptr)
 
 // FPSR returns the value of FPSR register.
-func FPSR() (value uintptr)
+func GetFPSR() (value uintptr)
 
 // SetFPSR writes the FPSR value.
 func SetFPSR(value uintptr)