[6.6 regression] qemu-system-riscv64: Unable to read ISA_EXT KVM register ssaia, error -1

[Andreas Schwab]

v6.6 broke KVM with qemu 8.1.2.

$ qemu-system-riscv64 -cpu rv64 -machine virt,accel=kvm
qemu-system-riscv64: Unable to read ISA_EXT KVM register ssaia, error -1

openat(AT_FDCWD, "/dev/kvm", O_RDWR|O_CLOEXEC) = 9
ioctl(9, _IOC(_IOC_NONE, 0xae, 0x1, 0), 0) = 10
ioctl(10, _IOC(_IOC_NONE, 0xae, 0x41, 0), 0) = 11
ioctl(11, _IOC(_IOC_WRITE, 0xae, 0xab, 0x10), 0x7fffd101e3f8) = 0
ioctl(11, _IOC(_IOC_WRITE, 0xae, 0xab, 0x10), 0x7fffd101e3f8) = 0
ioctl(11, _IOC(_IOC_WRITE, 0xae, 0xab, 0x10), 0x7fffd101e3f8) = 0
ioctl(11, _IOC(_IOC_WRITE, 0xae, 0xab, 0x10), 0x7fffd101e3f8) = 0
ioctl(11, _IOC(_IOC_WRITE, 0xae, 0xab, 0x10), 0x7fffd101e3f8) = 0
ioctl(11, _IOC(_IOC_WRITE, 0xae, 0xab, 0x10), 0x7fffd101e3f8) = 0
ioctl(11, _IOC(_IOC_WRITE, 0xae, 0xab, 0x10), 0x7fffd101e3f8) = 0
ioctl(11, _IOC(_IOC_WRITE, 0xae, 0xab, 0x10), 0x7fffd101e3f8) = 0
ioctl(11, _IOC(_IOC_WRITE, 0xae, 0xab, 0x10), 0x7fffd101e3f8) = -1 ENOENT (No such file or directory)
write(2, "qemu-system-riscv64:", 20qemu-system-riscv64:)    = 20
write(2, " ", 1 )                        = 1
write(2, "Unable to read ISA_EXT KVM regis"..., 51Unable to read ISA_EXT KVM register ssaia, error -1) = 51
write(2, "\n", 1
)                       = 1
close(11)                               = 0
close(10)                               = 0
close(9)                                = 0
exit_group(1)                           = ?
+++ exited with 1 +++

-- 
Andreas Schwab, SUSE Labs, schwab at suse.de
GPG Key fingerprint = 0196 BAD8 1CE9 1970 F4BE  1748 E4D4 88E3 0EEA B9D7
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