Messages in this thread | | | Subject | Re: [PATCH Part2 v5 04/45] x86/sev: Add RMP entry lookup helpers | From | Brijesh Singh <> | Date | Mon, 27 Sep 2021 11:01:37 -0500 |
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Hi Boris,
I agreed with all of your comment, responding to your specific questions.
On 9/24/21 4:49 AM, Borislav Petkov wrote: ...
>> +} >> +EXPORT_SYMBOL_GPL(snp_lookup_rmpentry); > > This export is for kvm, I presume?
yes, both KVM and CCP (i.e PSP) driver will need to lookup RMP entries.
> >> diff --git a/include/linux/sev.h b/include/linux/sev.h >> new file mode 100644 >> index 000000000000..1a68842789e1 >> --- /dev/null >> +++ b/include/linux/sev.h >> @@ -0,0 +1,30 @@ >> +/* SPDX-License-Identifier: GPL-2.0 */ >> +/* >> + * AMD Secure Encrypted Virtualization >> + * >> + * Author: Brijesh Singh <brijesh.singh@amd.com> >> + */ >> + >> +#ifndef __LINUX_SEV_H >> +#define __LINUX_SEV_H >> + >> +/* RMUPDATE detected 4K page and 2MB page overlap. */ >> +#define RMPUPDATE_FAIL_OVERLAP 7 >> + >> +#ifdef CONFIG_AMD_MEM_ENCRYPT >> +int snp_lookup_rmpentry(u64 pfn, int *level); >> +int psmash(u64 pfn); >> +int rmp_make_private(u64 pfn, u64 gpa, enum pg_level level, int asid, bool immutable); >> +int rmp_make_shared(u64 pfn, enum pg_level level); >> +#else >> +static inline int snp_lookup_rmpentry(u64 pfn, int *level) { return 0; } >> +static inline int psmash(u64 pfn) { return -ENXIO; } >> +static inline int rmp_make_private(u64 pfn, u64 gpa, enum pg_level level, int asid, >> + bool immutable) >> +{ >> + return -ENODEV; >> +} >> +static inline int rmp_make_shared(u64 pfn, enum pg_level level) { return -ENODEV; } >> + >> +#endif /* CONFIG_AMD_MEM_ENCRYPT */ >> +#endif /* __LINUX_SEV_H */ >> -- > > What is going to use this linux/ namespace header? >
The kvm and ccp drivers.
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