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| author |  Kai Huang <kai.huang@intel.com>
| 2021-03-19 20:22:17 +1300 |
|---|---|---|
| committer |  Borislav Petkov <bp@suse.de>
| 2021-03-25 17:33:11 +0100 |
| commit | e9a15a40e857fc6ccfbb05fec7b184e9003057df (patch) | |
| tree | ecbd1593e483739054736e0f3f80e37f70a3bb22 /arch/x86/kernel/cpu/feat_ctl.c | |
| parent | x86/sgx: Remove unnecessary kmap() from sgx_ioc_enclave_init() (diff) | |
| download | linux-e9a15a40e857fc6ccfbb05fec7b184e9003057df.tar.gz linux-e9a15a40e857fc6ccfbb05fec7b184e9003057df.tar.bz2 linux-e9a15a40e857fc6ccfbb05fec7b184e9003057df.zip | |
x86/cpufeatures: Make SGX_LC feature bit depend on SGX bit
Move SGX_LC feature bit to CPUID dependency table to make clearing all
SGX feature bits easier. Also remove clear_sgx_caps() since it is just
a wrapper of setup_clear_cpu_cap(X86_FEATURE_SGX) now.
Suggested-by: Sean Christopherson <seanjc@google.com>
Signed-off-by: Kai Huang <kai.huang@intel.com>
Signed-off-by: Borislav Petkov <bp@suse.de>
Reviewed-by: Sean Christopherson <seanjc@google.com>
Acked-by: Dave Hansen <dave.hansen@intel.com>
Acked-by: Jarkko Sakkinen <jarkko@kernel.org>
Link: https://lkml.kernel.org/r/5d4220fd0a39f52af024d3fa166231c1d498dd10.1616136308.git.kai.huang@intel.com
Diffstat (limited to 'arch/x86/kernel/cpu/feat_ctl.c')
| -rw-r--r-- | arch/x86/kernel/cpu/feat_ctl.c | 12 |
1 files changed, 3 insertions, 9 deletions
diff --git a/arch/x86/kernel/cpu/feat_ctl.c b/arch/x86/kernel/cpu/feat_ctl.c index 3b1b01f2b248..27533a6e04fa 100644 --- a/arch/x86/kernel/cpu/feat_ctl.c +++ b/arch/x86/kernel/cpu/feat_ctl.c @@ -93,15 +93,9 @@ static void init_vmx_capabilities(struct cpuinfo_x86 *c) } #endif /* CONFIG_X86_VMX_FEATURE_NAMES */ -static void clear_sgx_caps(void) -{ - setup_clear_cpu_cap(X86_FEATURE_SGX); - setup_clear_cpu_cap(X86_FEATURE_SGX_LC); -} - static int __init nosgx(char *str) { - clear_sgx_caps(); + setup_clear_cpu_cap(X86_FEATURE_SGX); return 0; } @@ -116,7 +110,7 @@ void init_ia32_feat_ctl(struct cpuinfo_x86 *c) if (rdmsrl_safe(MSR_IA32_FEAT_CTL, &msr)) { clear_cpu_cap(c, X86_FEATURE_VMX); - clear_sgx_caps(); + clear_cpu_cap(c, X86_FEATURE_SGX); return; } @@ -177,6 +171,6 @@ update_sgx: !(msr & FEAT_CTL_SGX_LC_ENABLED) || !enable_sgx) { if (enable_sgx) pr_err_once("SGX disabled by BIOS\n"); - clear_sgx_caps(); + clear_cpu_cap(c, X86_FEATURE_SGX); } } |