From: Nikunj A Dadhania <nikunj@amd.com>
To: <linux-kernel@vger.kernel.org>, <x86@kernel.org>
Cc: <bp@alien8.de>, <thomas.lendacky@amd.com>,
<dionnaglaze@google.com>, <pgonda@google.com>, <jroedel@suse.de>,
<mingo@redhat.com>, <tglx@linutronix.de>,
<dave.hansen@linux.intel.com>, <seanjc@google.com>,
<pbonzini@redhat.com>, <nikunj@amd.com>, <michael.roth@amd.com>,
<ketanch@iitk.ac.in>
Subject: [RFC PATCH 06/11] x86/mm: Add generic guest initialization hook
Date: Mon, 30 Jan 2023 17:33:22 +0530 [thread overview]
Message-ID: <20230130120327.977460-7-nikunj@amd.com> (raw)
In-Reply-To: <20230130120327.977460-1-nikunj@amd.com>
Add generic enc_init guest hook for performing any type of
initialization that is vendor specific.
Signed-off-by: Nikunj A Dadhania <nikunj@amd.com>
---
arch/x86/include/asm/x86_init.h | 2 ++
arch/x86/kernel/x86_init.c | 2 ++
arch/x86/mm/mem_encrypt.c | 3 +++
3 files changed, 7 insertions(+)
diff --git a/arch/x86/include/asm/x86_init.h b/arch/x86/include/asm/x86_init.h
index c1c8c581759d..4026ac30a79f 100644
--- a/arch/x86/include/asm/x86_init.h
+++ b/arch/x86/include/asm/x86_init.h
@@ -148,12 +148,14 @@ struct x86_init_acpi {
* @enc_status_change_finish Notify HV after the encryption status of a range is changed
* @enc_tlb_flush_required Returns true if a TLB flush is needed before changing page encryption status
* @enc_cache_flush_required Returns true if a cache flush is needed before changing page encryption status
+ * @enc_init Prepare and initialize encryption features
*/
struct x86_guest {
void (*enc_status_change_prepare)(unsigned long vaddr, int npages, bool enc);
bool (*enc_status_change_finish)(unsigned long vaddr, int npages, bool enc);
bool (*enc_tlb_flush_required)(bool enc);
bool (*enc_cache_flush_required)(void);
+ void (*enc_init)(void);
};
/**
diff --git a/arch/x86/kernel/x86_init.c b/arch/x86/kernel/x86_init.c
index ef80d361b463..a71996e51a9c 100644
--- a/arch/x86/kernel/x86_init.c
+++ b/arch/x86/kernel/x86_init.c
@@ -134,6 +134,7 @@ static void enc_status_change_prepare_noop(unsigned long vaddr, int npages, bool
static bool enc_status_change_finish_noop(unsigned long vaddr, int npages, bool enc) { return false; }
static bool enc_tlb_flush_required_noop(bool enc) { return false; }
static bool enc_cache_flush_required_noop(void) { return false; }
+static void enc_init_noop(void) { }
struct x86_platform_ops x86_platform __ro_after_init = {
.calibrate_cpu = native_calibrate_cpu_early,
@@ -155,6 +156,7 @@ struct x86_platform_ops x86_platform __ro_after_init = {
.enc_status_change_finish = enc_status_change_finish_noop,
.enc_tlb_flush_required = enc_tlb_flush_required_noop,
.enc_cache_flush_required = enc_cache_flush_required_noop,
+ .enc_init = enc_init_noop,
},
};
diff --git a/arch/x86/mm/mem_encrypt.c b/arch/x86/mm/mem_encrypt.c
index 9f27e14e185f..01abecc9a774 100644
--- a/arch/x86/mm/mem_encrypt.c
+++ b/arch/x86/mm/mem_encrypt.c
@@ -84,5 +84,8 @@ void __init mem_encrypt_init(void)
/* Call into SWIOTLB to update the SWIOTLB DMA buffers */
swiotlb_update_mem_attributes();
+ if (x86_platform.guest.enc_init)
+ x86_platform.guest.enc_init();
+
print_mem_encrypt_feature_info();
}
--
2.32.0
next prev parent reply other threads:[~2023-01-30 12:06 UTC|newest]
Thread overview: 14+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-01-30 12:03 [RFC PATCH 00/11] Add Secure TSC support for SNP guests Nikunj A Dadhania
2023-01-30 12:03 ` [RFC PATCH 01/11] virt: sev-guest: Use AES GCM crypto library Nikunj A Dadhania
2023-01-30 12:03 ` [RFC PATCH 02/11] virt: sev-guest: Move mutex to SNP guest device structure Nikunj A Dadhania
2023-01-30 12:03 ` [RFC PATCH 03/11] virt: sev-guest: Add snp_guest_req structure Nikunj A Dadhania
2023-01-30 18:45 ` Dionna Amalie Glaze
2023-01-31 3:08 ` Nikunj A. Dadhania
2023-01-30 12:03 ` [RFC PATCH 04/11] virt: sev-guest: Add simplified helper to assign vmpck Nikunj A Dadhania
2023-01-30 12:03 ` [RFC PATCH 05/11] x86/sev: Move and reorganize sev guest request api Nikunj A Dadhania
2023-01-30 12:03 ` Nikunj A Dadhania [this message]
2023-01-30 12:03 ` [RFC PATCH 07/11] x86/sev: Change TSC MSR behavior for Secure TSC enabled guests Nikunj A Dadhania
2023-01-30 12:03 ` [RFC PATCH 08/11] x86/sev: Add Secure TSC support for SNP guests Nikunj A Dadhania
2023-01-30 12:03 ` [RFC PATCH 09/11] x86/kvmclock: Use Secure TSC as clock if available Nikunj A Dadhania
2023-01-30 12:03 ` [RFC PATCH 10/11] x86/tsc: Mark Secure TSC as reliable clocksource Nikunj A Dadhania
2023-01-30 12:03 ` [RFC PATCH 11/11] x86/sev: Enable Secure TSC for SNP guests Nikunj A Dadhania
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=20230130120327.977460-7-nikunj@amd.com \
--to=nikunj@amd.com \
--cc=bp@alien8.de \
--cc=dave.hansen@linux.intel.com \
--cc=dionnaglaze@google.com \
--cc=jroedel@suse.de \
--cc=ketanch@iitk.ac.in \
--cc=linux-kernel@vger.kernel.org \
--cc=michael.roth@amd.com \
--cc=mingo@redhat.com \
--cc=pbonzini@redhat.com \
--cc=pgonda@google.com \
--cc=seanjc@google.com \
--cc=tglx@linutronix.de \
--cc=thomas.lendacky@amd.com \
--cc=x86@kernel.org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).