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| author | Paolo Bonzini <pbonzini@redhat.com> | 2021-01-27 09:28:49 +0100 |
|---|---|---|
| committer | Paolo Bonzini <pbonzini@redhat.com> | 2021-02-08 14:43:55 +0100 |
| commit | e7e7bdababeefff10736c6adf410c66d2f0d46fe (patch) | |
| tree | 51083d40362f1a247b4aa24a92611d5d7f534a7d /target/i386/cpu.c | |
| parent | 51909241d26fe6fe18a08def93ccc8273f61a8b3 (diff) | |
| download | qemu-e7e7bdababeefff10736c6adf410c66d2f0d46fe.zip qemu-e7e7bdababeefff10736c6adf410c66d2f0d46fe.tar.gz qemu-e7e7bdababeefff10736c6adf410c66d2f0d46fe.tar.bz2 | |
target/i86: implement PKS
Protection Keys for Supervisor-mode pages is a simple extension of
the PKU feature that QEMU already implements. For supervisor-mode
pages, protection key restrictions come from a new MSR. The MSR
has no XSAVE state associated to it.
PKS is only respected in long mode. However, in principle it is
possible to set the MSR even outside long mode, and in fact
even the XSAVE state for PKRU could be set outside long mode
using XRSTOR. So do not limit the migration subsections for
PKRU and PKRS to long mode.
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Diffstat (limited to 'target/i386/cpu.c')
| -rw-r--r-- | target/i386/cpu.c | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/target/i386/cpu.c b/target/i386/cpu.c index ff25ad6..0b0d65c 100644 --- a/target/i386/cpu.c +++ b/target/i386/cpu.c @@ -667,7 +667,7 @@ static void x86_cpu_vendor_words2str(char *dst, uint32_t vendor1, CPUID_7_0_EBX_RDSEED */ #define TCG_7_0_ECX_FEATURES (CPUID_7_0_ECX_PKU | \ /* CPUID_7_0_ECX_OSPKE is dynamic */ \ - CPUID_7_0_ECX_LA57) + CPUID_7_0_ECX_LA57 | CPUID_7_0_ECX_PKS) #define TCG_7_0_EDX_FEATURES 0 #define TCG_7_1_EAX_FEATURES 0 #define TCG_APM_FEATURES 0 @@ -964,7 +964,7 @@ static FeatureWordInfo feature_word_info[FEATURE_WORDS] = { "la57", NULL, NULL, NULL, NULL, NULL, "rdpid", NULL, NULL, "cldemote", NULL, "movdiri", - "movdir64b", NULL, NULL, NULL, + "movdir64b", NULL, NULL, "pks", }, .cpuid = { .eax = 7, |