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From: Marc Orr <marcorr@google.com>
To: Brijesh Singh <brijesh.singh@amd.com>
Cc: x86@kernel.org, linux-kernel@vger.kernel.org,
	 kvm list <kvm@vger.kernel.org>,
	linux-efi@vger.kernel.org,  platform-driver-x86@vger.kernel.org,
	linux-coco@lists.linux.dev,  linux-mm@kvack.org,
	linux-crypto@vger.kernel.org,
	 Thomas Gleixner <tglx@linutronix.de>,
	Ingo Molnar <mingo@redhat.com>, Joerg Roedel <jroedel@suse.de>,
	 Tom Lendacky <thomas.lendacky@amd.com>,
	"H. Peter Anvin" <hpa@zytor.com>,
	 Ard Biesheuvel <ardb@kernel.org>,
	Paolo Bonzini <pbonzini@redhat.com>,
	 Sean Christopherson <seanjc@google.com>,
	Vitaly Kuznetsov <vkuznets@redhat.com>,
	 Wanpeng Li <wanpengli@tencent.com>,
	Jim Mattson <jmattson@google.com>,
	 Andy Lutomirski <luto@kernel.org>,
	Dave Hansen <dave.hansen@linux.intel.com>,
	 Sergio Lopez <slp@redhat.com>, Peter Gonda <pgonda@google.com>,
	 Peter Zijlstra <peterz@infradead.org>,
	 Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com>,
	David Rientjes <rientjes@google.com>,
	 Dov Murik <dovmurik@linux.ibm.com>,
	Tobin Feldman-Fitzthum <tobin@ibm.com>,
	Borislav Petkov <bp@alien8.de>,
	 Michael Roth <michael.roth@amd.com>,
	Vlastimil Babka <vbabka@suse.cz>,
	tony.luck@intel.com,  npmccallum@redhat.com,
	brijesh.ksingh@gmail.com,  Alper Gun <alpergun@google.com>
Subject: Re: [PATCH Part2 RFC v4 15/40] crypto: ccp: Handle the legacy TMR allocation when SNP is enabled
Date: Wed, 14 Jul 2021 06:22:35 -0700	[thread overview]
Message-ID: <CAA03e5HA_vjhOtTPL-vKFJvPxseLRMs5=s90ffUwDWQxtG7aCQ@mail.gmail.com> (raw)
In-Reply-To: <20210707183616.5620-16-brijesh.singh@amd.com>

On Wed, Jul 7, 2021 at 11:37 AM Brijesh Singh <brijesh.singh@amd.com> wrote:
>
> The behavior and requirement for the SEV-legacy command is altered when
> the SNP firmware is in the INIT state. See SEV-SNP firmware specification
> for more details.
>
> When SNP is INIT state, all the SEV-legacy commands that cause the
> firmware to write memory must be in the firmware state. The TMR memory
> is allocated by the host but updated by the firmware, so, it must be
> in the firmware state.  Additionally, the TMR memory must be a 2MB aligned
> instead of the 1MB, and the TMR length need to be 2MB instead of 1MB.
> The helper __snp_{alloc,free}_firmware_pages() can be used for allocating
> and freeing the memory used by the firmware.
>
> While at it, provide API that can be used by others to allocate a page
> that can be used by the firmware. The immediate user for this API will
> be the KVM driver. The KVM driver to need to allocate a firmware context
> page during the guest creation. The context page need to be updated
> by the firmware. See the SEV-SNP specification for further details.
>
> Signed-off-by: Brijesh Singh <brijesh.singh@amd.com>
> ---
>  drivers/crypto/ccp/sev-dev.c | 144 +++++++++++++++++++++++++++++++----
>  include/linux/psp-sev.h      |  11 +++
>  2 files changed, 142 insertions(+), 13 deletions(-)
>
> diff --git a/drivers/crypto/ccp/sev-dev.c b/drivers/crypto/ccp/sev-dev.c
> index ad9a0c8111e0..bb07c68834a6 100644
> --- a/drivers/crypto/ccp/sev-dev.c
> +++ b/drivers/crypto/ccp/sev-dev.c
> @@ -54,6 +54,14 @@ static int psp_timeout;
>  #define SEV_ES_TMR_SIZE                (1024 * 1024)
>  static void *sev_es_tmr;
>
> +/* When SEV-SNP is enabled the TMR need to be 2MB aligned and 2MB size. */

nit: "the TMR need" -> "the TMR needs"

> +#define SEV_SNP_ES_TMR_SIZE    (2 * 1024 * 1024)
> +
> +static size_t sev_es_tmr_size = SEV_ES_TMR_SIZE;
> +
> +static int __sev_do_cmd_locked(int cmd, void *data, int *psp_ret);
> +static int sev_do_cmd(int cmd, void *data, int *psp_ret);
> +
>  static inline bool sev_version_greater_or_equal(u8 maj, u8 min)
>  {
>         struct sev_device *sev = psp_master->sev_data;
> @@ -151,6 +159,112 @@ static int sev_cmd_buffer_len(int cmd)
>         return 0;
>  }
>
> +static int snp_reclaim_page(struct page *page, bool locked)
> +{
> +       struct sev_data_snp_page_reclaim data = {};

Hmmm.. according to some things I read online, an empty initializer
list is not legal in C. For example:
https://stackoverflow.com/questions/17589533/is-an-empty-initializer-list-valid-c-code
I'm sure this is compiling. Should we change this to `{0}`, which I
believe will initialize all fields in this struct to zero, according
to: https://stackoverflow.com/questions/11152160/initializing-a-struct-to-0?

> +       int ret, err;
> +
> +       data.paddr = page_to_pfn(page) << PAGE_SHIFT;
> +
> +       if (locked)
> +               ret = __sev_do_cmd_locked(SEV_CMD_SNP_PAGE_RECLAIM, &data, &err);
> +       else
> +               ret = sev_do_cmd(SEV_CMD_SNP_PAGE_RECLAIM, &data, &err);
> +
> +       return ret;
> +}
> +
> +static int snp_set_rmptable_state(unsigned long paddr, int npages,
> +                                 struct rmpupdate *val, bool locked, bool need_reclaim)
> +{
> +       unsigned long pfn = __sme_clr(paddr) >> PAGE_SHIFT;
> +       unsigned long pfn_end = pfn + npages;
> +       struct psp_device *psp = psp_master;
> +       struct sev_device *sev;
> +       int rc;
> +
> +       if (!psp || !psp->sev_data)
> +               return 0;

Should this return a non-zero value -- maybe `-ENODEV`? Otherwise, the
`snp_alloc_firmware_page()` API will return a page that the caller
believes is suitable to use with FW. My concern is that someone
decides to use this API to stash a page very early on during kernel
boot and that page becomes a time bomb.

If we initialize `rc` to `-ENODEV` (or something similar), then every
return in this function can be `return rc`.

> +
> +       /* If SEV-SNP is initialized then add the page in RMP table. */
> +       sev = psp->sev_data;
> +       if (!sev->snp_inited)
> +               return 0;

Ditto. Should this turn a non-zero value?

> +
> +       while (pfn < pfn_end) {
> +               if (need_reclaim)
> +                       if (snp_reclaim_page(pfn_to_page(pfn), locked))
> +                               return -EFAULT;
> +
> +               rc = rmpupdate(pfn_to_page(pfn), val);
> +               if (rc)
> +                       return rc;
> +
> +               pfn++;
> +       }
> +
> +       return 0;
> +}
> +
> +static struct page *__snp_alloc_firmware_pages(gfp_t gfp_mask, int order, bool locked)
> +{
> +       struct rmpupdate val = {};

`{}` -> `{0}`? (Not sure, see my previous comment.)

> +       unsigned long paddr;
> +       struct page *page;
> +
> +       page = alloc_pages(gfp_mask, order);
> +       if (!page)
> +               return NULL;
> +
> +       val.assigned = 1;
> +       val.immutable = 1;
> +       paddr = __pa((unsigned long)page_address(page));
> +
> +       if (snp_set_rmptable_state(paddr, 1 << order, &val, locked, false)) {
> +               pr_warn("Failed to set page state (leaking it)\n");

Maybe `WARN_ONCE` instead of `pr_warn`? It's both a big attention
grabber and also rate limited.

> +               return NULL;
> +       }
> +
> +       return page;
> +}
> +
> +void *snp_alloc_firmware_page(gfp_t gfp_mask)
> +{
> +       struct page *page;
> +
> +       page = __snp_alloc_firmware_pages(gfp_mask, 0, false);
> +
> +       return page ? page_address(page) : NULL;
> +}
> +EXPORT_SYMBOL_GPL(snp_alloc_firmware_page);
>
> +static void __snp_free_firmware_pages(struct page *page, int order, bool locked)
> +{
> +       struct rmpupdate val = {};

`{}` -> `{0}`? (Not sure, see my previous comment.)

> +       unsigned long paddr;
> +
> +       if (!page)
> +               return;
> +
> +       paddr = __pa((unsigned long)page_address(page));
> +
> +       if (snp_set_rmptable_state(paddr, 1 << order, &val, locked, true)) {
> +               pr_warn("Failed to set page state (leaking it)\n");

WARN_ONCE?

> +               return;
> +       }
> +
> +       __free_pages(page, order);
> +}
> +
> +void snp_free_firmware_page(void *addr)
> +{
> +       if (!addr)
> +               return;
> +
> +       __snp_free_firmware_pages(virt_to_page(addr), 0, false);
> +}
> +EXPORT_SYMBOL(snp_free_firmware_page);
> +
>  static int __sev_do_cmd_locked(int cmd, void *data, int *psp_ret)
>  {
>         struct psp_device *psp = psp_master;
> @@ -273,7 +387,7 @@ static int __sev_platform_init_locked(int *error)
>
>                 data.flags |= SEV_INIT_FLAGS_SEV_ES;
>                 data.tmr_address = tmr_pa;
> -               data.tmr_len = SEV_ES_TMR_SIZE;
> +               data.tmr_len = sev_es_tmr_size;
>         }
>
>         rc = __sev_do_cmd_locked(SEV_CMD_INIT, &data, error);
> @@ -630,6 +744,8 @@ static int __sev_snp_init_locked(int *error)
>         sev->snp_inited = true;
>         dev_dbg(sev->dev, "SEV-SNP firmware initialized\n");
>
> +       sev_es_tmr_size = SEV_SNP_ES_TMR_SIZE;
> +
>         return rc;
>  }
>
> @@ -1153,8 +1269,10 @@ static void sev_firmware_shutdown(struct sev_device *sev)
>                 /* The TMR area was encrypted, flush it from the cache */
>                 wbinvd_on_all_cpus();
>
> -               free_pages((unsigned long)sev_es_tmr,
> -                          get_order(SEV_ES_TMR_SIZE));
> +
> +               __snp_free_firmware_pages(virt_to_page(sev_es_tmr),
> +                                         get_order(sev_es_tmr_size),
> +                                         false);
>                 sev_es_tmr = NULL;
>         }
>
> @@ -1204,16 +1322,6 @@ void sev_pci_init(void)
>             sev_update_firmware(sev->dev) == 0)
>                 sev_get_api_version();
>
> -       /* Obtain the TMR memory area for SEV-ES use */
> -       tmr_page = alloc_pages(GFP_KERNEL, get_order(SEV_ES_TMR_SIZE));
> -       if (tmr_page) {
> -               sev_es_tmr = page_address(tmr_page);
> -       } else {
> -               sev_es_tmr = NULL;
> -               dev_warn(sev->dev,
> -                        "SEV: TMR allocation failed, SEV-ES support unavailable\n");
> -       }
> -
>         /*
>          * If boot CPU supports the SNP, then first attempt to initialize
>          * the SNP firmware.
> @@ -1229,6 +1337,16 @@ void sev_pci_init(void)
>                 }
>         }
>
> +       /* Obtain the TMR memory area for SEV-ES use */
> +       tmr_page = __snp_alloc_firmware_pages(GFP_KERNEL, get_order(sev_es_tmr_size), false);
> +       if (tmr_page) {
> +               sev_es_tmr = page_address(tmr_page);
> +       } else {
> +               sev_es_tmr = NULL;
> +               dev_warn(sev->dev,
> +                        "SEV: TMR allocation failed, SEV-ES support unavailable\n");
> +       }
> +
>         /* Initialize the platform */
>         rc = sev_platform_init(&error);
>         if (rc && (error == SEV_RET_SECURE_DATA_INVALID)) {
> diff --git a/include/linux/psp-sev.h b/include/linux/psp-sev.h
> index 63ef766cbd7a..b72a74f6a4e9 100644
> --- a/include/linux/psp-sev.h
> +++ b/include/linux/psp-sev.h
> @@ -12,6 +12,8 @@
>  #ifndef __PSP_SEV_H__
>  #define __PSP_SEV_H__
>
> +#include <linux/sev.h>
> +
>  #include <uapi/linux/psp-sev.h>
>
>  #ifdef CONFIG_X86
> @@ -920,6 +922,8 @@ int snp_guest_dbg_decrypt(struct sev_data_snp_dbg *data, int *error);
>
>
>  void *psp_copy_user_blob(u64 uaddr, u32 len);
> +void *snp_alloc_firmware_page(gfp_t mask);
> +void snp_free_firmware_page(void *addr);
>
>  #else  /* !CONFIG_CRYPTO_DEV_SP_PSP */
>
> @@ -961,6 +965,13 @@ static inline int snp_guest_dbg_decrypt(struct sev_data_snp_dbg *data, int *erro
>         return -ENODEV;
>  }
>
> +static inline void *snp_alloc_firmware_page(gfp_t mask)
> +{
> +       return NULL;
> +}
> +
> +static inline void snp_free_firmware_page(void *addr) { }
> +
>  #endif /* CONFIG_CRYPTO_DEV_SP_PSP */
>
>  #endif /* __PSP_SEV_H__ */
> --
> 2.17.1
>
>

  reply	other threads:[~2021-07-14 13:22 UTC|newest]

Thread overview: 176+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-07-07 18:35 [PATCH Part2 RFC v4 00/40] Add AMD Secure Nested Paging (SEV-SNP) Hypervisor Support Brijesh Singh
2021-07-07 18:35 ` [PATCH Part2 RFC v4 01/40] KVM: SVM: Add support to handle AP reset MSR protocol Brijesh Singh
2021-07-14 20:17   ` Sean Christopherson
2021-07-15  7:39     ` Joerg Roedel
2021-07-15 13:42     ` Tom Lendacky
2021-07-15 15:45       ` Sean Christopherson
2021-07-15 17:05         ` Tom Lendacky
2021-07-07 18:35 ` [PATCH Part2 RFC v4 02/40] KVM: SVM: Provide the Hypervisor Feature support VMGEXIT Brijesh Singh
2021-07-14 20:37   ` Sean Christopherson
2021-07-14 21:00     ` Brijesh Singh
2021-07-07 18:35 ` [PATCH Part2 RFC v4 03/40] x86/cpufeatures: Add SEV-SNP CPU feature Brijesh Singh
2021-07-07 18:35 ` [PATCH Part2 RFC v4 04/40] x86/sev: Add the host SEV-SNP initialization support Brijesh Singh
2021-07-14 21:07   ` Sean Christopherson
2021-07-14 22:02     ` Brijesh Singh
2021-07-14 22:06       ` Sean Christopherson
2021-07-14 22:11         ` Brijesh Singh
2021-07-07 18:35 ` [PATCH Part2 RFC v4 05/40] x86/sev: Add RMP entry lookup helpers Brijesh Singh
2021-07-15 18:37   ` Sean Christopherson
2021-07-15 19:28     ` Brijesh Singh
2021-07-16 17:22       ` Brijesh Singh
2021-07-20 22:06         ` Sean Christopherson
2021-07-20 23:10           ` Brijesh Singh
2021-07-07 18:35 ` [PATCH Part2 RFC v4 06/40] x86/sev: Add helper functions for RMPUPDATE and PSMASH instruction Brijesh Singh
2021-07-12 18:44   ` Peter Gonda
2021-07-12 19:00     ` Dave Hansen
2021-07-15 18:56       ` Sean Christopherson
2021-07-15 19:08         ` Dave Hansen
2021-07-15 19:18           ` Sean Christopherson
2021-07-07 18:35 ` [PATCH Part2 RFC v4 07/40] x86/sev: Split the physmap when adding the page in RMP table Brijesh Singh
2021-07-14 22:25   ` Sean Christopherson
2021-07-15 17:05     ` Brijesh Singh
2021-07-15 17:51       ` Sean Christopherson
2021-07-15 18:14         ` Brijesh Singh
2021-07-15 18:39           ` Sean Christopherson
2021-07-15 19:38             ` Brijesh Singh
2021-07-15 22:01               ` Sean Christopherson
2021-07-15 22:11                 ` Brijesh Singh
2021-07-30 11:31               ` Vlastimil Babka
2021-07-30 16:10                 ` Brijesh Singh
2021-07-07 18:35 ` [PATCH Part2 RFC v4 08/40] x86/traps: Define RMP violation #PF error code Brijesh Singh
2021-07-15 19:02   ` Sean Christopherson
2021-07-15 19:16     ` Dave Hansen
2021-07-07 18:35 ` [PATCH Part2 RFC v4 09/40] x86/fault: Add support to dump RMP entry on fault Brijesh Singh
2021-07-07 19:21   ` Dave Hansen
2021-07-08 15:02     ` Brijesh Singh
2021-07-08 15:30       ` Dave Hansen
2021-07-08 16:48         ` Brijesh Singh
2021-07-08 16:58           ` Dave Hansen
2021-07-08 17:11             ` Brijesh Singh
2021-07-08 17:15               ` Dave Hansen
2021-07-07 18:35 ` [PATCH Part2 RFC v4 10/40] x86/fault: Add support to handle the RMP fault for user address Brijesh Singh
2021-07-08 16:16   ` Dave Hansen
2021-07-12 15:43     ` Brijesh Singh
2021-07-12 16:00       ` Dave Hansen
2021-07-12 16:11         ` Brijesh Singh
2021-07-12 16:15           ` Dave Hansen
2021-07-12 16:24             ` Brijesh Singh
2021-07-12 16:29               ` Dave Hansen
2021-07-12 16:49                 ` Brijesh Singh
2021-07-15 21:53                   ` Sean Christopherson
2021-07-30 16:00   ` Vlastimil Babka
2021-07-30 16:31     ` Dave Hansen
2021-07-07 18:35 ` [PATCH Part2 RFC v4 11/40] crypto:ccp: Define the SEV-SNP commands Brijesh Singh
2021-07-07 18:35 ` [PATCH Part2 RFC v4 12/40] crypto: ccp: Add support to initialize the AMD-SP for SEV-SNP Brijesh Singh
2021-07-07 18:35 ` [PATCH Part2 RFC v4 13/40] crypto: ccp: Shutdown SNP firmware on kexec Brijesh Singh
2021-07-07 18:35 ` [PATCH Part2 RFC v4 14/40] crypto:ccp: Provide APIs to issue SEV-SNP commands Brijesh Singh
2021-07-08 18:56   ` Dr. David Alan Gilbert
2021-07-07 18:35 ` [PATCH Part2 RFC v4 15/40] crypto: ccp: Handle the legacy TMR allocation when SNP is enabled Brijesh Singh
2021-07-14 13:22   ` Marc Orr [this message]
2021-07-14 16:45     ` Brijesh Singh
2021-07-14 18:14       ` Marc Orr
2021-07-15 23:48   ` Sean Christopherson
2021-07-16 12:55     ` Brijesh Singh
2021-07-16 15:35       ` Sean Christopherson
2021-07-16 15:47         ` Brijesh Singh
2021-07-07 18:35 ` [PATCH Part2 RFC v4 16/40] crypto: ccp: Handle the legacy SEV command " Brijesh Singh
2021-07-07 18:35 ` [PATCH Part2 RFC v4 17/40] crypto: ccp: Add the SNP_PLATFORM_STATUS command Brijesh Singh
2021-07-07 18:35 ` [PATCH Part2 RFC v4 18/40] crypto: ccp: Add the SNP_{SET,GET}_EXT_CONFIG command Brijesh Singh
2021-07-07 18:35 ` [PATCH Part2 RFC v4 19/40] crypto: ccp: provide APIs to query extended attestation report Brijesh Singh
2021-07-07 18:35 ` [PATCH Part2 RFC v4 20/40] KVM: SVM: Make AVIC backing, VMSA and VMCB memory allocation SNP safe Brijesh Singh
2021-07-14 13:35   ` Marc Orr
2021-07-14 16:47     ` Brijesh Singh
2021-07-20 18:02   ` Sean Christopherson
2021-08-03 14:38     ` Brijesh Singh
2021-07-07 18:35 ` [PATCH Part2 RFC v4 21/40] KVM: SVM: Add initial SEV-SNP support Brijesh Singh
2021-07-16 18:00   ` Sean Christopherson
2021-07-16 18:46     ` Brijesh Singh
2021-07-16 19:31       ` Sean Christopherson
2021-07-16 21:03         ` Brijesh Singh
2021-07-07 18:35 ` [PATCH Part2 RFC v4 22/40] KVM: SVM: Add KVM_SNP_INIT command Brijesh Singh
2021-07-16 19:33   ` Sean Christopherson
2021-07-16 21:25     ` Brijesh Singh
2021-07-19 20:24       ` Sean Christopherson
2021-07-07 18:35 ` [PATCH Part2 RFC v4 23/40] KVM: SVM: Add KVM_SEV_SNP_LAUNCH_START command Brijesh Singh
2021-07-12 18:45   ` Peter Gonda
2021-07-16 19:43   ` Sean Christopherson
2021-07-16 21:42     ` Brijesh Singh
2021-07-07 18:36 ` [PATCH Part2 RFC v4 24/40] KVM: SVM: Add KVM_SEV_SNP_LAUNCH_UPDATE command Brijesh Singh
2021-07-16 20:01   ` Sean Christopherson
2021-07-16 22:00     ` Brijesh Singh
2021-07-19 20:51       ` Sean Christopherson
2021-07-19 21:34         ` Brijesh Singh
2021-07-19 21:36           ` Brijesh Singh
2021-07-07 18:36 ` [PATCH Part2 RFC v4 25/40] KVM: SVM: Reclaim the guest pages when SEV-SNP VM terminates Brijesh Singh
2021-07-16 20:09   ` Sean Christopherson
2021-07-16 22:16     ` Brijesh Singh
2021-07-17  0:46       ` Sean Christopherson
2021-07-19 12:55         ` Brijesh Singh
2021-07-19 17:18           ` Sean Christopherson
2021-07-19 18:34             ` Brijesh Singh
2021-07-19 19:03               ` Sean Christopherson
2021-07-19 19:14                 ` Sean Christopherson
2021-07-19 19:37                 ` Brijesh Singh
2021-07-20 16:40                   ` Sean Christopherson
2021-07-20 18:23                     ` Brijesh Singh
2021-07-07 18:36 ` [PATCH Part2 RFC v4 26/40] KVM: SVM: Add KVM_SEV_SNP_LAUNCH_FINISH command Brijesh Singh
2021-07-16 20:18   ` Sean Christopherson
2021-07-16 22:48     ` Brijesh Singh
2021-07-19 16:54       ` Sean Christopherson
2021-07-19 18:29         ` Brijesh Singh
2021-07-19 19:14           ` Sean Christopherson
2021-07-19 19:49             ` Brijesh Singh
2021-07-19 20:13               ` Sean Christopherson
2021-07-21 17:53         ` Marc Orr
2021-07-07 18:36 ` [PATCH Part2 RFC v4 27/40] KVM: X86: Add kvm_x86_ops to get the max page level for the TDP Brijesh Singh
2021-07-16 19:19   ` Sean Christopherson
2021-07-16 20:41     ` Brijesh Singh
2021-07-20 19:38       ` Sean Christopherson
2021-07-20 20:06         ` Brijesh Singh
2021-07-07 18:36 ` [PATCH Part2 RFC v4 28/40] KVM: X86: Introduce kvm_mmu_map_tdp_page() for use by SEV Brijesh Singh
2021-07-16 18:15   ` Sean Christopherson
2021-07-07 18:36 ` [PATCH Part2 RFC v4 29/40] KVM: X86: Introduce kvm_mmu_get_tdp_walk() for SEV-SNP use Brijesh Singh
2021-07-07 18:36 ` [PATCH Part2 RFC v4 30/40] KVM: X86: Define new RMP check related #NPF error bits Brijesh Singh
2021-07-16 20:22   ` Sean Christopherson
2021-07-17  0:34     ` Brijesh Singh
2021-07-07 18:36 ` [PATCH Part2 RFC v4 31/40] KVM: X86: update page-fault trace to log the 64-bit error code Brijesh Singh
2021-07-16 20:25   ` Sean Christopherson
2021-07-17  0:35     ` Brijesh Singh
2021-07-07 18:36 ` [PATCH Part2 RFC v4 32/40] KVM: SVM: Add support to handle GHCB GPA register VMGEXIT Brijesh Singh
2021-07-16 20:45   ` Sean Christopherson
2021-07-17  0:44     ` Brijesh Singh
2021-07-19 20:04       ` Sean Christopherson
2021-07-07 18:36 ` [PATCH Part2 RFC v4 33/40] KVM: SVM: Add support to handle MSR based Page State Change VMGEXIT Brijesh Singh
2021-07-16 21:00   ` Sean Christopherson
2021-07-19 14:19     ` Brijesh Singh
2021-07-19 18:55       ` Sean Christopherson
2021-07-19 19:15         ` Brijesh Singh
2021-08-13 16:32         ` Borislav Petkov
2021-07-07 18:36 ` [PATCH Part2 RFC v4 34/40] KVM: SVM: Add support to handle " Brijesh Singh
2021-07-16 21:14   ` Sean Christopherson
2021-07-19 14:24     ` Brijesh Singh
2021-07-07 18:36 ` [PATCH Part2 RFC v4 35/40] KVM: Add arch hooks to track the host write to guest memory Brijesh Singh
2021-07-19 23:30   ` Sean Christopherson
2021-07-20 15:15     ` Brijesh Singh
2021-07-07 18:36 ` [PATCH Part2 RFC v4 36/40] KVM: X86: Export the kvm_zap_gfn_range() for the SNP use Brijesh Singh
2021-07-07 18:36 ` [PATCH Part2 RFC v4 37/40] KVM: SVM: Add support to handle the RMP nested page fault Brijesh Singh
2021-07-20  0:10   ` Sean Christopherson
2021-07-20 17:55     ` Brijesh Singh
2021-07-20 22:31       ` Sean Christopherson
2021-07-20 23:53         ` Brijesh Singh
2021-07-21 20:15           ` Sean Christopherson
2021-07-07 18:36 ` [PATCH Part2 RFC v4 38/40] KVM: SVM: Provide support for SNP_GUEST_REQUEST NAE event Brijesh Singh
2021-07-19 22:50   ` Sean Christopherson
2021-07-20 14:37     ` Brijesh Singh
2021-07-20 16:28       ` Sean Christopherson
2021-07-20 18:21         ` Brijesh Singh
2021-07-20 22:09           ` Sean Christopherson
2021-07-07 18:36 ` [PATCH Part2 RFC v4 39/40] KVM: SVM: Use a VMSA physical address variable for populating VMCB Brijesh Singh
2021-07-21  0:20   ` Sean Christopherson
2021-07-21 16:26     ` Tom Lendacky
2021-07-07 18:36 ` [PATCH Part2 RFC v4 40/40] KVM: SVM: Support SEV-SNP AP Creation NAE event Brijesh Singh
2021-07-21  0:01   ` Sean Christopherson
2021-07-21 17:47     ` Tom Lendacky
2021-07-21 19:52       ` Sean Christopherson
2021-08-20 14:44         ` Tom Lendacky
2021-07-08 15:40 ` [PATCH Part2 RFC v4 00/40] Add AMD Secure Nested Paging (SEV-SNP) Hypervisor Support Dave Hansen

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