Re: [PATCH v2 30/50] target/i386: Assert !SVME for user-only

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Re: [PATCH v2 30/50] target/i386: Assert !SVME for user-only

From:	Paolo Bonzini
Subject:	Re: [PATCH v2 30/50] target/i386: Assert !SVME for user-only
Date:	Tue, 18 May 2021 11:51:07 +0200
User-agent:	Mozilla/5.0 (X11; Linux x86_64; rv:78.0) Gecko/20100101 Thunderbird/78.8.1

On 14/05/21 17:13, Richard Henderson wrote:

Most of the VMM instructions are already disabled for
user-only, by being usable only from ring 0.

The spec is intentionally loose for VMMCALL, allowing
the VMM to define syscalls for user-only.  However,
linux does not do so; VMMCALL is illegal.


Perhaps:

However we're not emulating any VMM, so VMMCALL can just raise #UDunconditionally.


Paolo

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Re: [PATCH v2 32/50] target/i386: Implement skinit in translate.c, (continued)
- [PATCH v2 31/50] target/i386: Assert !GUEST for user-only, Richard Henderson, 2021/05/14
  - Re: [PATCH v2 31/50] target/i386: Assert !GUEST for user-only, Paolo Bonzini, 2021/05/18
- [PATCH v2 33/50] target/i386: Eliminate SVM helpers for user-only, Richard Henderson, 2021/05/14
  - Re: [PATCH v2 33/50] target/i386: Eliminate SVM helpers for user-only, Paolo Bonzini, 2021/05/18
- [PATCH v2 24/50] target/i386: Reduce DisasContext popl_esp_hack and rip_offset to uint8_t, Richard Henderson, 2021/05/14
  - Re: [PATCH v2 24/50] target/i386: Reduce DisasContext popl_esp_hack and rip_offset to uint8_t, Paolo Bonzini, 2021/05/18
- [PATCH v2 22/50] target/i386: Reduce DisasContext.prefix to uint8_t, Richard Henderson, 2021/05/14
  - Re: [PATCH v2 22/50] target/i386: Reduce DisasContext.prefix to uint8_t, Paolo Bonzini, 2021/05/18
- [PATCH v2 30/50] target/i386: Assert !SVME for user-only, Richard Henderson, 2021/05/14
  - Re: [PATCH v2 30/50] target/i386: Assert !SVME for user-only, Paolo Bonzini <=
- [PATCH v2 29/50] target/i386: Add stub generator for helper_set_dr, Richard Henderson, 2021/05/14
  - Re: [PATCH v2 29/50] target/i386: Add stub generator for helper_set_dr, Paolo Bonzini, 2021/05/18
- [PATCH v2 36/50] target/i386: Tidy svm_check_intercept from tcg, Richard Henderson, 2021/05/14
  - Re: [PATCH v2 36/50] target/i386: Tidy svm_check_intercept from tcg, Paolo Bonzini, 2021/05/18
- [PATCH v2 37/50] target/i386: Remove pc_start argument to gen_svm_check_intercept, Richard Henderson, 2021/05/14
  - Re: [PATCH v2 37/50] target/i386: Remove pc_start argument to gen_svm_check_intercept, Paolo Bonzini, 2021/05/18
- [PATCH v2 38/50] target/i386: Remove user stub for cpu_vmexit, Richard Henderson, 2021/05/14
  - Re: [PATCH v2 38/50] target/i386: Remove user stub for cpu_vmexit, Paolo Bonzini, 2021/05/18
- [PATCH v2 39/50] target/i386: Cleanup read_crN, write_crN, lmsw, Richard Henderson, 2021/05/14
  - Re: [PATCH v2 39/50] target/i386: Cleanup read_crN, write_crN, lmsw, Paolo Bonzini, 2021/05/18

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